196 results about "Sodication" patented technology

The invention discloses a monitoring method of salt ion content in saline soil based on a hyperspectral technology. The method comprises the following main steps: (1) collecting a soil sample in the wild and pre-treating the sample; (2) drying and sifting the soil sample; (3) measuring the total salt and eight salt ions in the soil sample; (4) carrying out hyperspectral measurement on the soil sample to obtain the original spectral reflectance characteristic curve of the soil sample; (5) processing the original spectral value, and carrying out correlation analysis between the spectral value and the measured salt ion content; (6) introducing the construction method of a support vector machine model, and performing model building and precision evaluation on the screened spectral transformation form. The monitoring method is relatively high in the prediction accuracy for each salt ion content in soil, provides a novel approach for the indoor measurement of the salt ion content in saline soil, and provides a novel way for achieving quick and lossless monitoring of the harm types of regional soil salinization.

The invention relates to a method for intercropping sorgho and sesbania on a saline and alkaline land, and the method comprises the following steps of: A, soil desalting and land preparation: desalting the plowed layer soil of the saline and alkaline land, leveling the land, fertilizing, and seeding; B, intercropping, wherein the intercropping row number ratio of the sorgho and the sesbania is 1:3, namely one row of the sorgho is intercropped with three rows of the sesbania, the row spacing of the sesbania and the sorgho is 25-30 cm, the row spacing of the sesbania is 33-35 cm, and the row spacing of the sorgho is 100-105 cm; C, field management: thinning or filling seedlings when the sorgho has 2-3 leaves and the sesbania has 3-4 leaves, and singling one strain in every hole; and D, harvesting: harvesting the sorgho 7-10 days before grains are mature, reaping stalks and seeds, and reaping the sesbania before the grains are mature and cracked. The method disclosed by the invention promotes the balanced yield increase of the sorgho and the sesbania by utilizing the advantage complementary action of a symbiotic system of the sorgho and the sesbania, reduces the fertilizer addition, effectively remits the nutrient pinch obstruction of the saline and alkaline land, alleviates the secondary salinization of soil and enhances the composite utilization ratio of the land.

The invention discloses a cultivation method for solving continuous cropping obstacles in protected agriculture. The method includes the key steps of performing deep tillage, burying livestock manure and straws, irrigating, covering greenhouses, letting in fresh air, applying biological organic fertilizers and the like, in agricultural greenhouse idle reasons July to August each year. The cultivation method has the advantages that the comprehensive technique of integrating soil deep tillage, greenhouse high-temperature covering, straw returning, soil sterilization and soil secondary salinization reduction is achieved, soil EC values are decreased, fewer soil-borne diseases occur, more organic matters are provided for the soil, the damage of continuous cropping obstacles to crops is substantially solved accordingly, and safety production of the protected agriculture is achieved.

The invention discloses a method for controlling salinity of medium and severe salinized soils applicable for cotton culture. Before sowing of cotton, ditching is performed by means of traction, wherein ditches are straight and are consistent in depth; crop straws are crushed and then covered in the ditches, the ditches are filled and levelled up by using soils and then are compacted; during sowing of the cotton, drip irrigation zones are paved to be above the ditches according to a mulch row spacing and a junction row spacing, drip irrigation is performed immediately after sowing, an irrigation volume is 30-40m<3> / mu (1 mu equals to 0.0667 hectares); from a trefoil stage to a harvesting stage during a growth period of the cotton, a high-frequency drip irrigation method is adopted. According to the method disclosed by the invention, by means of establishing a salt resisting layer, the cotton is subjected to dry sowing and wet germination, the salt is controlled to be below the resisting layer; in a sowing area of the cotton, the salinity is controlled to be below 6g / kg, so as to guarantee germination of the cotton; during a growth period, a high-frequency drip irrigation way is adopted to establish a desalting area for growth of the cotton, so that in a soil layer of 0-30cm, the salinity is controlled to be 10g / kg, in this way, a technical problem in salinity control of medium and severe salinized soils during cotton culture is solved, and the method has an important application value.

The invention discloses a preparation method of a seaweed biological soil conditioner with a saline and alkaline land improvement function. The soil conditioner is prepared with a compound microbial fermentation technology from raw materials including Enteromorpha, kelp and oyster shell powder, has the functions of seaweed fertilizer, microbial fertilizer and organic fertilizer, contains rich seaweed functional active ingredients and large quantities of probiotics, can effectively regulate microbial balance of soil, decompose organic or inorganic constituents such as organic matters, mineral substances and the like in the soil, eliminate soil hardening, desertification, salinization and the like caused by abuse of chemical fertilizer all year round and improve the soil effectively, has the specific function of improving the stress resistance of crops, and improves the crop capacity; the soil conditioner can especially promote release of the organic matters in the soil, improves the physicochemical structure of salinity soil, improves the soil aggregate and permeability, improves the soil fertility, improves the grain yield increase capacity of a saline and alkaline land and is an excellent saline and alkaline land soil conditioner and a crop growth promoter.

The invention discloses a preparation method and application of a secondary-salinization soil remediation microbial inoculum, wherein the secondary-salinization soil remediation microbial inoculum consists of a freeze-dried bacillus megaterium strain fermentation broth and a protective agent; specifically, the bacillus megaterium is bacillus megaterium NCT-2 which is preserved in China General Microbiological Culture Collection Center with preservation number of CGMCC No.4698; and the protective agent is any one or any combinations of sucrose, mannitol, Tween 80, glycerol, skimmed milk powder, sorbitol, starch, L-sodium glutamate, maltodextrin, glucose and trehalose. The invention is simple in technology and low in cost, and a finished product is convenient to carry, good in performance quality and is capable of effectively reducing nitrate content in soil, increasing organic matter content in the soil and effectively improving the yield and the quality of vegetables. The freeze-dried microbial inoculum has a broad prospect in the remediation of secondary-salinization soil of greenhouse vegetables.

The invention discloses a saline-alkali soil deep ploughing irrigation regulating treatment all-in-one machine which comprises a reeling type irrigation supply device and a deep ploughing irrigation machine tool vehicle; the reeling type irrigation supply device comprises an irrigation reel, an irrigation reel drive and a water supply PE pipe; the deep poughing irrigation machine tool vehicle comprises a vehicle body, lifting wheels, deep ploughing machine tools, a hydraulic control device and an irrigation water distribution structure; the top ends of the deep ploughing irrigation machine tools are connected to the vehicle body in a hinged mode, the bottom end of each deep ploughing irrigation machine tool is of a hook structure which bends forwards and is provided with a hollow cavity, an irrigation opening is formed in the rear portion of the bottom end of each hook structure, and the deep ploughing irrigation machine tools are connected with the vehicle body through machine tool lifting hydraulic cylinders; the water outlet end of the irrigation water distribution mechanism is communicated with the hollowing cavities of the hook structures of the deep ploughing irrigation machine tools. The saline-alkali soil deep ploughing irrigation regulating treatment all-in-one machine can achieve the phenomenon that soil secondary salinization is prevented on the premise that a water resource is saved, and the governance cost is lowered, efficient organic fertilizer application can be achieved, and the machine is especially suitable for initial improvement regulation of saline-alkali soil high in degree of alkalisation.

The invention relates to a modified bentonite environment-friendly formaldehyde removing agent for removing free formaldehyde in urea-formaldehyde glue. A preparation method of the formaldehyde removing agent comprises the following steps of: in parts by weight, crushing 100 parts of calcium bentonite, screening the crushed calcium bentonite through a 200-mesh sieve, adding 2 to 3.5 parts of sodium carbonate into the screened calcium bentonite, mixing uniformly, spraying water of which the weight accounts for 10 percent of that of the calcium bentonite, fully mixing uniformly, sealing the mixture for 24 hours for sodication reaction, and air-drying naturally; and adding 0.5 to 2.5 parts of hydroxyethyl cellulose, 1.5 to 2.5 parts of ammonia chloride and 2.5 to 5 parts of sodium nitrite into 100 parts of a raw material subjected to sodication, crushing the mixture and stirring for 3 hours to obtain powder, and screening the powder through a 300-mesh sieve to obtain formaldehyde removing powder. A use method of the modified bentonite environment-friendly formaldehyde removing agent comprises the following steps of: in parts by weight, adding 10 parts of water into 10 parts of the formaldehyde removing agent, stirring at a high speed for 40 minutes, adding 10 parts of a suspension of the mixture into 90 parts of the urea-formaldehyde glue, raising the temperature to 50 DEG C, fully stirring for 30 minutes, standing for more than 24 hours, and thus fully adsorbing the formaldehyde in the urea-formaldehyde glue. The modified bentonite environment-friendly formaldehyde removing agent has good adsorption effect on the formaldehyde, and cannot influence the performance of the urea-formaldehyde glue.

The invention relates to a green and efficient biological organic soil improvement agent, in particular to a novel composite biological soil improvement agent. The novel multifunctional composite biological soil improvement agent is characterized by being prepared by uniformly mixing the following raw materials in parts by weight: 20-40 parts of rhizopus stolonifer fermentation liquid, 20-40 parts of trichoderma viride fermentation liquid, 1.5-2.5 parts of water-soluble chitin and 1.5-4.5 parts of potassium fulvic. The soil improvement agent mainly has the functions that the photosynthesis capacity of plants can be enhanced, and the directional transportation of photosynthetic products is facilitated; the root growth is promoted, and the yield is increased by 20% to 30%; the fruits are attractive, the color is bright, and the content of sugar and vitamins is increased; the soil pH value is increased; acidified soil, hardened soil and salinity soil are improved; the soil nutrient is activated, and the soil fertility is released.

The invention discloses a nano saline alkali soil improvement agent. The nano saline alkali soil improvement agent comprises the following components according to a formula: 48-92wt% of ardealite, 0.001-5wt% of boric acid, 0.01-10wt% of zinc sulphate, 2-30wt% of urea phosphate, 1-35wt% of potassium fulvic acid and 0.001-5wt% of nano photocatalyst. The nano saline alkali soil improvement agent contains the nano photocatalyst, and heavy metal content in ardealite can be reduced by utilizing photochemical characteristics of the nano photocatalyst; soil source microorganisms of disease are killed by utilizing sterilization characteristic of a nano material; besides, surface activation performance of the nano material is utilized for improving ion exchange performance of the improvement agent and improving fertilizer efficiency of the improvement agent; and meanwhile, the problems that a contact area between a calcium preparation and soil particles is small as particles of a calcium preparation are larger and the capacity for replacing Na<+> in soil colloid by virtue of Ca<2+> is poorer in an existing salinity soil improvement agent are solved.

The invention discloses a method for controlling salinity of a saline and alkaline land. The method comprises the steps of: adopting a way of covering ridges with films and putting straws below ridges, that is to say, paving straws below ridges, and covering the ridges with films to prevent salinity of soil from moving upwards. The provided method for controlling salinity of the saline and alkaline land has the beneficial effects that: 1) straws are paved below the ridges to prevent salinity from moving upwards; 2) the ridges are covered with films, so that effects of temperature increase and preservation of soil moisture are obtained, floor evaporation is reduced, and salinity is prevented from moving towards the earth surface along with capillary water; 3) straws deeply buried in soil can generate organic acid and active organic substances in the decay process, so that the soil can be fertilized, and local salinization environment is improved.

The invention provides a modifier for secondary salinization of facility horticulture soil and a preparation method thereof. The raw materials comprise weathered coal or brown coal, zeolite and vermiculite of 1: (0.4-0.5): (0.15-0.25) parts by weight. The invention is a technique for preventing the secondary salinization of facility soil, and a modifier prepared according to the origin characteristic of the secondary salinization of facility soil and the fertilizer requirement of vegetables through the scientific experiments for years. The modifier for secondary salinization of facility horticulture soil has the advantages of rational product formula, obvious salt reducing effect, greatly increased yield of vegetables, easy application for farmers and distinct economic benefit. The inventive modifier and applied technology thereof can effectively treat the secondary salinization of facility soil, improve facility soil environment, balance nutrients of crops, and increase the yield and quality of vegetables and are favorable to the sustainable usage of the facility soil. The inventive method and product can effectively reduce the salt of soil by 30%-60% and increase the yield of vegetables by more than 10%.

The invention discloses a preparation method of a soil microbial remediation fungicide for salinized soil. The preparation method comprises the following steps: step 1, preparing a first composite fungicide and a second composite fungicide; step 2, performing enlarged culture on a salt-tolerant fungus strain; step 3, preparing a coating agent; step 4, mixing furfural residues with mushroom dregs, and performing crushing; step 5, fermenting a first composite fungicide; step 6, performing high-temperature fermentation; step 7, mixing plant ash with bentonite; step 8, mixing the second composite fungicide, and performing low-temperature oxygen consumption stacking fermentation; step 9, performing granulating; step 10, performing vacuum low-temperature drying and screening; and step 11, uniformly scattering a chelating agent and a nitrification inhibitor on the surfaces of the granules, and performing coating. The problems that in the prior art, a salinized soil remediation microbial agent prepared from plant ash, furfural residues and mushroom dregs does not contain various active microorganisms with different functions, the colonization survival performance of the microorganisms is low, and the disease prevention and insect prevention effects are not achieved can be solved.

The invention relates to a method for extracting vanadium from burning slag of a stone coal vanadium mine fluidized bed. The method comprises the following process flows of: grinding the burning slag of the stone coal vanadium mine fluidized bed together with ammonium sulfate, and roasting an obtained ground material at a low temperature; leaching an obtained roasting product by adopting dilute sulphuric acid, and sequentially preparing V2O5 and aluminum compounds from an obtained leaching solution by adopting a conventional method; preparing ammonium sulfate from the solution after aluminum extraction; and returning the obtained aluminum extraction to the grinding procedure for recycling. The invention provides the method for extracting the vanadium by roasting the burning slag of the stone coal vanadium mine fluidized bed at the low temperature and then leaching by using the dilute sulphuric acid, wherein the roasting temperature of the method is only 300-500 DEG C, and compared with the traditional sodication, calcification and low sodium roasting, the roasting temperature of the method is reduced by a half, so the energy consumption is obviously reduced, and the method is easy to implement in industrial production and solves the problem that proper roasting equipment is short of large production lines for extracting the vanadium from stone coal. Due to the method, the vanadium and the aluminum are more easily extracted from the leaching solution by using the traditional technology, and the leaching rates of vanadium and aluminum are respectively more than 88% and 91% which are both higher than those in the traditional method; and the ammonium sulfate is recovered from waste water where the vanadium and the aluminum are extracted and then returned to be used as an ingredient, so the method has the advantages of less consumption auxiliary materials, low processing cost and environmental protection.

The present invention discloses one kind of soil amendment. The soil amendment consists of zeolite powder, sodium fulvate, ferrous sulfate, magnesium sulfate, boric fertilizer and zinc fertilizer. The soil amendment may be used to raise soil temperature, improve soil aggregate structure, increase air and water in soil, regulate pH value of soil and promote the growth of beneficial microbes, so as to improve soil, increase crop yield and raise agricultural product quality.

The invention discloses a method for governing and improving soda saline and alkaline land through magnet tailing composite modifying agents. Tourmaline powder is accommodated in multiple-hole small cloth bags connected to a long rope and is evenly scattered onto a paddy field surface to make the paddy field surface make sufficient contact with tourmalines, water is completely drained after 4-5 days of field soaking, fresh water is supplemented, soaking is carried out 4-5 days, water is drained, salt leaching is carried out, and the modifying agents are applied, wherein the modifying agents are formed by mixing magnet tailing powder, fermented organic fertilizer and furfural residue; water filling, field harrowing, mud making and transplanting are carried out, and conventional rice cultivation technological management is carried out. The tourmalines are utilized to improve the salt leaching effect and quickly reducing salinity, and water drainage and salt leaching carried out before transplanting is carried out on the soda saline and alkaline land aim to quickly reduce salinity. Because saline-alkali soil is covered with the magnet tailing powder, physical properties of the soil can be changed, rain can more easily infiltrate downwards, surface soil salt can be leached, soil becomes rough in texture, and salt and alkali recovery is prevented. A drip line rises, water can not arrive at the ground directly easily, and salt is prevented from accumulating towards the earth surface. Poor physical characteristics like coldness, poor permeability and adhesion of alkali land are improved, less salt can rise, the soil is loosened, the saline and alkaline land is well improved, and secondary salinization is avoided.

The invention relates to a special fertilizer for a grape, which is prepared by the following ingredients in parts by weight: 25-30 parts of biogas residue, 15-20 parts of diammonium phosphate, 15-20 parts of potassium fulvic acid, 8-12 parts of boric acid, 8-12 parts of humic acid, 5-10 parts of pulverized fuel ash, 2-5 parts of ferrous sulfate, 2-5 parts of zinc sulfate and the balance of glycerol. With the adoption of the technical scheme, the special fertilizer for the grape provides the grape with nutriments required by the grape, effectively prevents soil from alkalization and salinization, increases the amount of organic matters of the soil, changes physical and chemical properties of the soil, prevents soil hardening and improves soil fertility through various acidic materials contained in the special fertilizer.

The invention discloses an organic fertilizer containing furfural slag and biological bacteria, as well as a preparation method thereof. The organic fertilizer containing furfural slag and biological bacteria comprises components in parts by weight as follows: 15 parts of furfural slag, 13 parts of chicken manure, 5 parts of amino acid, 15 parts of humic acid, 12 parts of bone powder, 20 parts of xylogen, 15 parts of bentonite and 5 parts of biological bacteria; the furfural slag is waste furfural slag generated in a furfural slag production process; and the biological bacteria are a mixture of one or more than two of bacillus megatherium, rhizobium japonicum, purple perilla rhizobium and an EM (effective microorganism) flora. According to the organic fertilizer containing furfural slag and biological bacteria, as well as the preparation method thereof, a large amount of furfural slag is added in the effective components, so that contents of CO3<2->and HCO3<-> in the soil can be reduced, physical and chemical properties of soil are effectively improved, and alkalinity of soil is reduced; and further, the content of the furfural slag in the organic fertilizer is higher, during application, Cl<-> can be further reduced, contents of elements such as organic matters, potassium, nitrogen and the like in salinity soil are increased, and the elements and other nutritional ingredients in the organic fertilizer are combined to promote growth of crops.

The invention belongs to the fields of microbial application technology and biological restoration of contaminated soil, and particularly relates to a Serratiasp. strain and application thereof in the restoration of salinized petroleum-contaminated soil. The Serratiasp. strain disclosed by the invention was preserved by China General Microbiological Culture Collection Center on September 9th, 2011, and the preservation number is CGMCC NO.5236; and the strain can efficiently degrade petroleum in a high-salt liquid environment and salinized soil. The strain is separated out from salinized petroleum-contaminated soil under salt stress conditions. The strain has regular edges, and is round in colony, non-transparent and white in color; and the thallus is a short rhabditiform and gram negativeone having a small size. The invention also discloses a nucleotide sequence of the Serratiasp. strain. The strain can degrade petroleum in a high-salt liquid environment, has a petroleum degradation rate of 60% or above in salinized soil, and has an obvious application effect in the restoration of salinized soil in the field.

The invention discloses a soil conditioner for improving acidification and salinization of soil. The soil conditioner is composed of biochar and vinegar lees at a mass ratio of (0.8-1.2):(0.8-1.2). The soil conditioner is added to the soil at a weight ratio of 3-5%, and can be used for improving acidified and / or salinized soil. Through the soil conditioner, the pH value of the soil can be increased, the EC value of the soil can be reduced, the urease and phosphatase activity of the soil can be improved, and the physical and chemical properties can be improved; and in addition, the photosynthetic ability of lettuce can be improved, the lettuce quality can be improved, and the lettuce yield can be increased. Above all, the soil acidification and secondary salinization hazards can be reducedthrough the method, the crop quality and yield can be increased, resources can be recycled, and environmental protection and high efficiency, cost saving and significant effects can be achieved.

The invention relates to the technical field of microbial fertilizer, and specifically relates to phosphate-solubilizing penicillium PSF. The strain is named, in classification, as PSF and belongs toPenicillium sp., namely to Penicillium citrinum; and the phosphate-solubilizing penicillium PSF is deposited with the China General Microbiological Culture Collection Center on Oct. 9th, 2019 and assigned accession number CGMCC No. 18558, and the deposited address is No. 3, No. 1 yard, West Beichen Road, Chaoyang District, Beijing 100101. The provided phosphate-solubilizing penicillium PSF has good dissolution effects on various insoluble phosphate such as Ca5(PO4)3OH, AlPO4, Zn3(PO4) and FePO4; and the phosphate-solubilizing penicillium PSF has high salt tolerance and can well grow and colonize in salinized soil so as to make insoluble phosphorus converted into dissolved phosphate that can be absorbed and utilized by plants, so that the growth of the plants can be promoted, the using amount of chemical fertilizer can be reduced, and therefore, the phosphate-solubilizing penicillium PSF can have good application and development prospects.

The invention discloses a method for improving the salt resistance of tall fescue by virtue of an air-dried sludge microbial agent. The microbial agents comprise Pseudomonas stutzeri + Trichoderma reesei + 100-fold dilution of Streptomyces flavus or Pseudomonas stutzeri + Trichoderma reesei + 200-fold dilution of Streptomyces flavus. The experimental results show that the plant height, biomass and chlorophyll content of tall fescue can be significantly improved, the contents of malonaldehyde and proline are lowered and the protective enzyme activity of tall fescue is enhanced by applying sludge complex microbial agents. On the whole, the microbial agents exhibit better effects in low fertility and the salinized soil, which fully shows the potential applications of microbial agents in the saline-alkali soil improvement.

The invention belongs to the technical field of resource utilization and composting, and relates to an organic fertilizer taking coffee grounds as a main raw material, and an aerobic composting process and an application of the organic fertilizer. Residual coffee grounds processed in coffee shops are used as the main raw material, environmental pollution caused by the coffee grounds is reduced, and the coffee grounds resources are recycled. High-temperature aerobic composting fermentation is realized by controlling the use amount and water content of each component in the mixture and controlling ventilation and the ventilation quantity according to the oxygen content in a reactor and the temperature of a compost body, so that the fermentation period is shortened, the composting energy consumption is reduced, the composting degree of the product is improved, and the degradation rate of organic matters is as high as 40% or above. The coffee grounds have a special porous structure and have an adsorption effect on soluble salt in the composting process, so that a relatively small EC change amplitude is ensured, the salinization risk of a composting product is reduced, and a quite goodremediation effect on soil is achieved. The pH value of the prepared organic fertilizer is 6.69-7.06, and the requirement that the pH value of a compost product should be 5.5-8.5 is met.

The invention belongs to the technical field of waste treatment, and particularly relates to a soil conditioner based on kitchen waste, a preparation method of the soil conditioner and a soil improvement method. The preparation method of the soil conditioner comprises the following steps: (1) treating raw materials; (2) washing and desalting; (3) performing centrifugal dehydration; (4) performingsecondary de-oiling; and (5) preparing the soil conditioner. The soil conditioner is applied to soil, mixed, irrigated and covered with a film, the salt content of the soil can be greatly reduced, thecontent of organic matters, total nitrogen, quick-acting phosphorus and quick-acting potassium in the soil can be increased, meanwhile, the pH of the soil can be increased, the volume weight of the soil can be reduced, formation of a soil aggregate structure can be promoted, and the porosity of the soil can be increased. Soil continuous cropping obstacles are reduced, and the incidence rate of crop soil-borne diseases caused by continuous cropping soil is reduced. The soil improvement method is high in treatment speed and free of pollution residues after treatment is completed, the physical and chemical properties of the secondary salinized soil can be remarkably improved, meanwhile, a new direction is provided for recycling of the kitchen waste, and the application prospect is great.

The invention relates to a saline alkali soil repairing microorganism bacterium agent and a preparation method thereof. In an agricultural production process, fertilizer is excessively utilized so that nutrients of agricultural products and agricultural soil are accumulated, secondary salinization is caused and certain problems on ecological security of the agricultural soil and the agricultural sustainable development are caused. In a special liquid fermentation culture medium provided by the invention, salt-tolerance microorganism micrococcus luteus A393 and cold-salt-tolerance mononucleosisA413 are cultured; a fermentation solution is collected and is centrifuged and separated to remove moisture in the fermentation solution to obtain orange red paste-shaped bacterium sludge; glycerineand kaolin are added and are uniformly stirred and mixed to obtain a white solid preparation, namely a target product. The invention provides an efficient and economical environment-friendly type saline alkali soil repairing technology; the soil saline alkali degree can be reduced by 70 percent or more; the efficient and economical environment-friendly type saline alkali soil repairing technologyhas the advantages of low treatment cost, simplicity in construction, no secondary pollution, small environment influences and the like.

The invention discloses a bentonite-containing hand-washing cream used in a heavy dirty industry and a production method thereof, and belongs to the field of deep processing of bentonite. The hand-washing cream is prepared from the following components: 10-15 parts of bentonite, 1-1.5 parts of a sodication agent, 10-20 parts of a surfactant, 0.5 part of an auxiliary agent, 20-30 parts of an abradant, 0.5-1 part of glycerol and 40-50 parts of water. By virtue of adsorption, chargeability, lubricity and other properties of the bentonite, through addition of the surfactant and the abradant, the surfactant has the functions of emulsifying, wetting, dispersing, dissolving and decomposing oil (dirt), and in coordination with the functions of the abradant, the oil (dirt) removing capability of the hand-washing cream can be significantly improved; the hand-washing cream can be widely used for workers in the heavy dirt industry to wash hands, a novel way is developed for utilization of the bentonite, and the production cost of the hand-washing cream is reduced.

The invention relates to the technical field of soil remediation, and discloses a secondary salinization soil leacheate sampling device which comprises a sampling pipe, the sampling pipe is in a round drill rod shape, a cylindrical cavity is coaxially formed in the sampling pipe, a plurality of circles of guide holes are distributed in a shell of the sampling pipe in the axial direction, and the guide holes in the same circle are evenly distributed in the circumferential direction. A high-pressure water pipe is coaxially fixed in the cavity, and one end of the high-pressure water pipe extends out of the sampling pipe and is connected with a liquid inlet pipe. The tail end of the insertion pipe can be inserted into soil to inject leacheate, operation is easy and convenient, the sampling pipe can sample leached soil through the insertion pipe inserted into the soil, a soil sample and the leacheate in the soil can be conveniently taken back, meanwhile, a draining hole is formed in the sampling pipe shell, and the sampling pipe is convenient to use. More leacheate can conveniently enter the cavity, a sample obtained after soil leaching can be stably and effectively obtained, and detection and use are convenient.

The invention relates to a drainage well layout calculation method for relieving soil secondary salinization. The method comprises the steps that the critical burial depth of salinized underground water is determined; hydrogeological parameters of a research area are determined; the underground water drawdown of a salinization area is determined; the influence radius of drainage wells is calculated; and reasonable layout of the drainage wells in the salinization area is determined. By taking the salinized underground water critical burial depth as a management and control target, the reasonable underground water drawdown of the secondary salinization area is accurately determined, and the influence radius of the drainage wells is determined by analyzing the influence of water pumping of the drainage wells on the underground water level, so that the underground water level of the secondary salinization area is accurately reduced by reasonably arranging the drainage wells, and secondarysalinization caused by the over-high underground water level of a local area due to unsmooth drainage of irrigation return water is remarkably and effectively relieved. The method has universality forsolving the problem of soil salinization caused by the too high underground water level, and reliable theoretical and technical supports are provided for guiding treatment of soil salinization and reasonable development and utilization of underground water resources.