47results about How to "Effective elution" patented technology

The present invention provides an eluent for repairing contaminated soil. The eluent comprises, by weight, 50-70 parts of a nonionic biosurfactant and 5-30 parts of an anionic surfactant. The compounding synergism of the nonionic biosurfactant and the anionic surfactant enhances the solubilizing effect of the eluent on organic pollutants in soil, especially polycyclic aromatic hydrocarbons, so theelution efficiency of the eluent is significantly improved; and the components of the elutent are biodegradable, so the eluent does not cause secondary damage to the environment in the use process, and is an efficient, clean and environmentally-friendly in situ eluent for repairing contaminated soil. The eluent provided by the invention is firstly foamed in the use process, so the spreading efficiency of an eluent solution in the soil medium is increased, the migration of the eluent in the horizontal direction is enhanced, and the uniformity and the repairing efficiency of the eluent in the soil are further improved.

The invention relates to a membrane cleaning agent for polyacrylamide pollutants on reverse osmosis membranes. In the present invention, two types of chemical cleaning agents, acidic and alkaline, are prepared, and the polyacrylamide and the organic and inorganic pollutants wrapped on the surface of the polluted reverse osmosis membrane can be dissolved, dispersed, stripped and removed in a targeted manner. The invention has the characteristics of simple preparation of the cleaning agent, convenient and easy-to-obtain raw materials, quick restoration of the water production flux of the reverse osmosis membrane, no damage to the reverse osmosis membrane element, and the like.

The invention discloses an arsenic polluted soil remediating agent and an application thereof. A preparation method of the arsenic polluted soil remediating agent comprises steps of activation of a P11 strain, preparation of a fermentation broth, preparation of P11 dry powder, preparation of the arsenic polluted soil remediating agent and the like. The strain and culture medium materials used in the technical scheme are simple, easy to obtain and low in cost; the arsenic polluted soil remediating agent product is slightly acid, has the natural and most suitable pH (6.4+ / -0.2), the pH value isnot required to be adjusted during usage, the process is simplified, and secondarily, the pH is very close to that of common soil, so that the agent cannot harm to the soil. The arsenic polluted soilremediating agent can effectively elute arsenic in the soil and has the total removal rate of arsenic during ectopic leaching up to 95.52%; the P11 dry powder is used as a microbial fermented productand can be biodegraded, thus, the environment risk of the remediating agent remediation technology is reduced, and the agent causes small harm to the environment and cannot cause secondary pollution.

The invention discloses a high performance liquid chromatographic analysis method for simultaneous determination of the content of 14 kinds of vitamins; octadecylsilane bonded silica gel is used as a filling agent, a 0.1 M sodium acetate solution-methanol is used as a mobile phase for gradient elution, gradient flow velocity of the mobile phase and a program change wavelength of an ultraviolet detector are combined, and intact separation and quantitative analysis of the 14 kinds of vitamins (including 4 kinds of fat soluble vitamins and 10 kinds of water soluble vitamins) can be achieved in 60 minutes. The method has the advantages of strong specificity, high precision, good stability, high accuracy, simple operation, and cheap and easily available reagents and consumable materials, is suitable for quality control of compound vitamin products in medicine and food industries, and can effectively save the cost and time of detection.

The invention belongs to the field of steroid hormone drug analysis methods, and particularly relates to an HPLC analysis method for estrone-related substances, wherein the main parameters comprise that a chromatographic column having an octyl silane bonded silica gel as a filler is selected, mobile phase gradient elution is performed, the mobile phase comprises water, methanol and acetonitrile, high performance liquid chromatography analysis is performed at an appropriate flow rate and an appropriate column temperature, and the chromatogram is recorded. According to the present invention, with the HPLC analysis method, the impurities in the estrone bulk drug can be subjected to effective elution, separation and quantitation, and can be completely separated from the main peak, and the analysis is rapid; and the method can be separately used for the detection of the related substance in estrone impurity A sample or estrone impurity D sample.

The invention relates to the technical field of environmental engineering, in particular to a method for promoting dispersion and migration of nano ferroferric oxide. The method includes following steps: (1), dissolving xanthan gum into water, and stirring well to prepare a dispersant of certain concentration; (2), adding nano ferroferric oxide into the dispersant in the step (1), and stirring well to obtain nano ferroferric oxide dispersion liquid of certain concentration; (3), injecting the nano ferroferric oxide dispersion liquid in the step (2) into a water containing layer soil medium tobe treated. The xanthan gum has extremely strong stabilization assistance on nano ferroferric oxide, and dispersed nano ferroferric oxide shows remarkable migration performance in the water containinglayer soil medium. The xanthan gum is a microbial metabolite and is completely biodegradable, and is more environment-friendly and lower in cost when compared with synthetic products like polyacrylicacid and sodium carboxymethylcellulose commonly used at present.

The invention discloses a regenerating method of a zinc oxide desulfuration waste agent. The regenerating method includes the following steps that (1) aerobic roasting is carried out on the zinc oxide desulfuration waste agent, and non-activated zinc oxide materials and waste gas are obtained; (2) the waste gas is scrubbed with sulfuric acid, and a scrubbing solution is collected; (3) the non-activated zinc oxide materials and the scrubbing solution are mixed to make a replacement reaction, first-time solid-liquid separation is carried out after the reaction is finished, and a first liquid phase is obtained; (4) the first liquid phase, ammonium carbonate and / or ammonium bicarbonate react, and the pH value of a reaction system is controlled to be 7 in the reaction process until the reaction is finished; the pH value of a solution obtained after the reaction in the step (4) is finished keeps unchanged, the temperature of the solution rises to 60 DEG C to 70 DEG C, heat preservation and ageing are carried out, second-time solid-liquid separation is carried out after aging is finished, and a second solid phase is obtained; and (6) the second solid phase is subject to drying and roasting in sequence, and activated zinc oxide is obtained. The regenerating method is high in regenerating rate, and the breakthrough sulfur capacity of the activated zinc oxide obtained after regeneration is high.

The invention discloses a preparation method of a bactericidal deodorant, which comprises the following steps: (a) using a first surfactant to infiltrate shells to obtain infiltrated shells; (b) infiltrating the shells treated microwave puffing treatment to obtain puffed shells; (c) pulverizing the puffed shells to obtain pulverized shells; (d) preparing a mixture of the second surfactant, pulverized shells and water to obtain the described Germicidal deodorant. The invention also discloses the bactericidal and deodorant prepared by the aforementioned method. The bactericidal deodorant can kill bacteria well and eliminate bad smell.

The invention relates to a pretreatment method for measuring intracellular microcystin in natural water. The method comprises the steps of (1) carrying out microscopic examination before a water sample is filtered, and determining the quantity of needed water according to the turbid degree of the water sample and the detection effect of microcystis; (2) filtering the water sample, carrying out cell disruption after a filter membrane is cut into pieces, rotated in a vortex way and evenly mixed, and carrying out centrifugal separation to obtain supernate; (3) enriching the supernate containing microcystin in a solid-phase extraction column; and (4) eluting the microcystin enriched in the solid-phase extraction column, drying by blowing nitrogen, and making up to volume for testing. The method is simple, high in flexibility and high in operability, and is suitable for the pretreatment in the long-term measurement of intracellular microcystin in natural water at different seasons and in different areas.

The invention discloses an ultrafiltration membrane chemical cleaning method and aims at an ultrafiltration membrane that is used for processing purified PTA waste water. The invention uses an acid lotion prepared by citric acid and sodium bisulfite for dissolving and eluting inorganic pollutants that are formed by cobalt and manganese ion hydroxide, deposited and absorbed on the surface of the ultrafiltration membrane, and uses an alkaline oxidative lotion that contains sodium hypochlorite for dissolving and eluting organic colloid pollutants that are deposited and absorbed on the surface ofthe ultrafiltration membrane. The ultrafiltration membrane chemical cleaning method can effectively elute the pollutants, recover the running flux and running pressure of the ultrafiltration membrane, and ensure stable running of the purified PTA waste water in an ultrafiltration process.