Method for producing heavy metal passivators for farmland soil and application of heavy metal passivators

A heavy metal passivator and production method technology, applied in chemical instruments and methods, applications, soil conditioning materials, etc., can solve the problems of secondary pollution, high cost, incomplete clarity, etc., to reduce the residual of harmful substances, fast speed , the effect of simple and easy technology

Inactive Publication Date: 2018-08-17
吴洪生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] These methods have their own advantages and disadvantages, and most of them are used for water pollution control, but not many are used for large-scale soil pollution control, because the cost is too high, there is secondary pollution, and at the same time, it is not clear enough

Method used

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  • Method for producing heavy metal passivators for farmland soil and application of heavy metal passivators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Add 500 grams of calcium polysulfide, 500-2500 potassium sulfide, 500-2500 grams of dipotassium hydrogen phosphate, 500 grams of sodium lignosulfonate, 1000 grams of potassium humate, 500 grams of bentonite in a 10-liter suspension, 500 grams of quicklime, stir slowly, add 500 grams of sodium silicate and 500 grams of EDTA after mixing, slowly stir, transfer to a ball mill for crushing, and make a powder mixture with a particle size of about 300 mesh.

[0029] 2. Add 800 grams of the product treated in the above 1 into a container containing 10 kilograms of soil, let the mixture fully contact with the heavy metals in the soil, and fully react. Before adding the above mixture, add 1000 grams to the soil containing heavy metals Milliliters of distilled water, fully moisten the soil, and make the soil particles and voids evenly distributed, without large holes and soil clods.

[0030] 3. Stir the soil and the added passivator mixture after the above 1 treatment, keep st...

Embodiment 2

[0032]1. Add 2,000 grams of calcium polysulfide, 1,500 grams of potassium sulfide, 1,500 grams of dipotassium hydrogen phosphate, 1,000 grams of sodium lignosulfonate, 1,500 grams of potassium humate, 1,500 grams of bentonite, and 1,000 grams of quicklime in a 10-liter suspension. Stir slowly, add 1,000 grams of sodium silicate and 800 grams of EDTA after everything is mixed, stir slowly, transfer to a ball mill for crushing, and make a powder mixture with a particle size of about 300 mesh.

[0033] 2. Add 500 grams of the product treated in the above 1 into a container containing 10 kilograms of soil, let the mixture fully contact with the heavy metals in the soil, and fully react. Before adding the above mixture, add 2000 grams to the soil containing heavy metals Milliliters of distilled water, fully moisten the soil, and make the soil particles and voids evenly distributed, without large holes and soil clods.

[0034] 3. Stir the soil and the added passivator mixture after ...

Embodiment 3

[0036] 1. Add 5,000 grams of calcium polysulfide, 2,500 grams of potassium sulfide, 2,500 grams of dipotassium hydrogen phosphate, 1,500 grams of sodium lignosulfonate, 2,000 grams of potassium humate, 2,500 grams of bentonite, and 1,500 grams of quicklime in a 10-liter suspension , Stir slowly, after everything is mixed, add 1500 grams of sodium silicate and 1000 grams of EDTA, the total amount is about 20 kg, stir slowly, transfer to a ball mill for crushing, and make a powder mixture with a particle size of about 300 mesh.

[0037] 2. Add 100 grams of the product treated in the above 1 into a container containing 10 kilograms of soil, let the mixture fully contact with the heavy metals in the soil, and fully react. Before adding the above mixture, add 4000 Milliliters of distilled water, fully moisten the soil, and make the soil particles and voids evenly distributed, without large holes and soil clods.

[0038] 3. Stir the soil and the added passivator mixture after the ab...

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Abstract

The invention discloses a method for producing heavy metal passivators for farmland soil and application of the heavy metal passivators, and belongs to the field of environmental protection. The method includes steps of adding calcium polysulfide, potassium sulfide, potassium dihydrogen phosphate, sodium lignosulfonate, potassium humate, bentonite and quicklime into a suspending machine, stirringthe calcium polysulfide, the potassium sulfide, the potassium dihydrogen phosphate, the sodium lignosulfonate, the potassium humate, the bentonite and the quicklime and uniformly mixing the calcium polysulfide, the potassium sulfide, the potassium dihydrogen phosphate, the sodium lignosulfonate, the potassium humate, the bentonite and the quicklime with one another to obtain first mixtures; transferring the first mixtures into a ball mill and smashing the first mixtures; adding sodium silicate and EDTA (ethylene diamine tetraacetic acid) into the first mixtures and uniformly stirring the sodium silicate, the EDTA and the first mixtures. The method and the application have the advantages that the heavy metal passivators which are mixtures can be added into the soil contaminated by differenttypes of heavy metal, accordingly, the different types of heavy metal in the soil can be immobilized and passivated and can be turned into insoluble metal salt or alkali, and the activity, the mobility and the bioavailability of the heavy metal in the soil can be deteriorated to a great extent; contamination of the soil due to the different types of heavy metal can be abated, accordingly, the soil productivity and underground water can be protected, and the food safety can be guaranteed.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to a production method and application of a farmland soil heavy metal passivator. Background technique [0002] Heavy metals in nature are mainly distributed in the atmosphere, water and soil. The distribution of heavy metals in different systems is different, and the sources are divided into natural sources and artificial sources. [0003] Through the analysis and comparison of the heavy metal data in the surface dust of the main functional areas of several provincial capital cities, the results show that the heavy metal content in the surface dust of industrial areas is the highest, the content of heavy metals in the surface dust of traffic areas is the lowest, and the content of heavy metals in the surface dust of commercial areas and residential cultural and educational areas is in the middle. Level. Zn and Pb are the elements with greater differences in the level of hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08B09C2101/00C09K17/40C09K2101/00
Inventor 吴洪生
Owner 吴洪生
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