A vegetable cd, pb pollution and acidification, salinization soil remediation granule, its preparation method and application

A technology of soil remediation and granules, which is applied in the agricultural field to achieve good adsorption effect, improve hydrophilicity and cation exchange capacity, and alleviate vegetable salt damage

Active Publication Date: 2021-10-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the joint modification method is used to prepare modified biochar and add steel slag, pure organic binder, endophytic mycorrhizal fungus and EM bacteria to simultaneously repair soil Cd, Pb pollution, acidification and salinization and achieve good results. Application not reported

Method used

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  • A vegetable cd, pb pollution and acidification, salinization soil remediation granule, its preparation method and application
  • A vegetable cd, pb pollution and acidification, salinization soil remediation granule, its preparation method and application
  • A vegetable cd, pb pollution and acidification, salinization soil remediation granule, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1, modified traditional Chinese medicine residue charcoal adsorption of Cd, Pb

[0039] Chinese herbal residue charcoal was prepared under optimal cracking conditions, and then HNO 3 and KMnO 4 Preparation of HNO after solution impregnation and secondary pyrolysis 3 -KMnO 4 Combined with modified traditional Chinese medicine slag carbon, the specific surface area, total pore volume, and micropore volume (cm 3 / g), average pore diameter (nm). Using coconut shell charcoal as a control, the physical and chemical properties of traditional Chinese medicine residue charcoal before and after modification were compared and analyzed, and the changes in the potential ability of the modified method to adsorb Cd and Pb on the charcoal of traditional Chinese medicine residue were analyzed. The results are shown in Table 1.

[0040] 1. Preparation of traditional Chinese medicine residue charcoal

[0041] Collect the waste slag (more than 70% water content) from the prod...

Embodiment 2

[0049] Embodiment two, the preparation and screening of granule

[0050] 1. Raw material preparation and processing

[0051] 1.1 Preparation of traditional Chinese medicine residue charcoal

[0052] Preparation method is the same as 1 in embodiment one

[0053] 1.2 Preparation of modified traditional Chinese medicine residue charcoal powder

[0054] The modified traditional Chinese medicine residue charcoal was obtained according to 2 in Example 1, and the modified traditional Chinese medicine residue charcoal powder was obtained by crushing through a 60-100 mesh sieve and stored in an airtight bag for future use.

[0055] 1.3 Steel slag powder preparation:

[0056] Steel slag, a by-product of iron and steel production, is collected, air-dried to a water content of 10% to 12%, and crushed through a 60-mesh to 100-mesh sieve for later use.

[0057] 1.4 Adhesive preparation:

[0058] The organic binder whose main component is the modified starch of the wood department is us...

Embodiment 3

[0084] Embodiment three, granule field application method and application rate

[0085] The place of implementation is the same as in Example 2, adopting the granule 4 in the example 2 to carry out the field application method and application rate test on the eggplant, after 15 weeks, by measuring and analyzing the TCLP extraction state Cd, Pb content change, soil pH value, EC value in the soil The changes in the content of Cd and Pb in eggplant fruit, the growth potential and yield of eggplant, and finally determine the fertilization method and amount of fertilizer with low operation cost and high restoration efficiency. 6 treatment groups were set in the test: 1) blank control (no granules); 2) 100 kg of granules per acre; 3) 100 kg of granules per acre; 4) 150 kg of granules per acre; 150kg of granules per mu; 6) 200kg of granules per mu.

[0086] The method of hole application: prepare the soil according to the cultivation requirements and make a ridge, then determine the...

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Abstract

The invention relates to a vegetable Cd, Pb pollution and acidification, salinization soil restoration granule, its preparation method and its application. The granule is obtained by pyrolyzing the waste residue of Mailuoning as raw material to obtain charcoal of traditional Chinese medicine slag; using HNO 3 -KMnO 4 After modifying the charcoal powder of traditional Chinese medicine slag, mix steel slag powder and organic binder (wood department modified starch) to obtain an adsorption carrier, carry the concentrated mycorrhizal powder and EM stock solution on the adsorption carrier, adjust the water content, and granulate to obtain. Applying the soil remediation granules by hole application significantly reduced soil Cd and Pb, quickly repaired the soil, alleviated the salt damage of vegetables, improved yield and quality, and increased yield by 153% to 179% compared with the control.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a method for preparing vegetable planting Cd and Pb pollution and acidification and salinization soil remediation granules and its application. Background technique [0002] With the rapid development of industries involving heavy metal emissions such as mining, battery manufacturing, electroplating, chemical industry, and metallurgy, the amount of heavy metal emissions has increased year by year. In addition, some companies have violated regulations and exceeded sewage standards, sewage irrigation in vegetable production, and pesticides, chemical fertilizers, etc. A large amount of waste organic fertilizer has made heavy metal pollution, acidification and salinization of vegetable soil a high incidence. The inventor found in the research that in the same vegetable field within 5 years, the Cd content increased by nearly 3.8 times, and the Pb increased by 2 times. Although the accumula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08C09K101/00C09K109/00
CPCB09C1/00B09C1/08B09C2101/00C09K17/40C09K2101/00C09K2109/00
Inventor 毛欣宇魏湖滨邵孝候于怀志
Owner HOHAI UNIV
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