Soil conditioner for treating heavy metal pollution of cultivated land and preparation method thereof

A soil conditioner and heavy metal technology, applied in soil conditioning materials, chemical instruments and methods, low temperature treatment fertilizers, etc., can solve the problems of low removal rate of cadmium and lead, easy to cause harm again, hinder the growth of crops, etc., and achieve restoration. Fast, enhanced passivation effect, reduced absorption effect

Inactive Publication Date: 2021-09-28
GUANGZHOU XINNONGKE FERTILIZER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing soil amendments have a low removal rate of cadmium and lead in heavy metal-polluted farmland soil, and heavy metals are likely to cause harm again after re-enrichment and hinder crop growth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The soil conditioner used in this embodiment to control the heavy metal pollution of cultivated land is made of the following percentages of raw materials: 25% plant ash, 4% calcium magnesium phosphate fertilizer, 5% quicklime, 16% zeolite, 2% hydroxyapatite, 21 % organic fertilizer, 3% compound algae powder, 12% humic acid resin, 5% nano-based modified bentonite, 1% magnesium silicate, 3% potassium sulfoselenide, 1% nano zero-valent Iron, 2% modified molybdenum disulfide, the sum of the content percentages of the above-mentioned components is 100%;

[0025] Wherein the preparation method of the humic acid resin is: pulverize sodium sulfonated humate, pass through a 150 mesh sieve, mix the pulverized sodium sulfonated humate with phenolic resin and hydrochloric acid in a mass ratio of 1:2:1, mix After uniformity, cross-link and solidify at 400°C for 5 hours, wash with deionized water until colorless, dry, grind, and sieve, then soak the crude humic acid resin in calcium...

Embodiment 2

[0032] The soil conditioner used in this embodiment to control cultivated land heavy metal pollution is made of the following percentages of raw materials: 25% plant ash, 5% calcium magnesium phosphate fertilizer, 4% quicklime, 17% zeolite, 2% hydroxyapatite, 20% % organic fertilizer, 3% compound algae powder, 12% humic acid resin, 5% nano-based modified bentonite, 1% magnesium silicate, 3% potassium sulfoselenide, 1% nano zero-valent Iron, 2% modified molybdenum disulfide, the sum of the content percentages of the above-mentioned components is 100%;

[0033] Wherein the preparation method of the humic acid resin is: pulverize sodium sulfonated humate, pass through a 150 mesh sieve, mix the pulverized sodium sulfonated humate with phenolic resin and hydrochloric acid in a mass ratio of 1:2:1, mix After uniformity, cross-link and solidify at 400°C for 5 hours, wash with deionized water until colorless, dry, grind, and sieve, then soak the crude humic acid resin in calcium aceta...

Embodiment 3

[0040] The soil conditioner used in this embodiment to control cultivated land heavy metal pollution is made of the following percentages of raw materials: 25% plant ash, 5% calcium magnesium phosphate fertilizer, 4% quicklime, 16% zeolite, 2% hydroxyapatite, 20% % organic fertilizer, 3% compound algae powder, 13% humic acid resin, 5% nano-based modified bentonite, 1% magnesium silicate, 3% potassium sulfoselenide, 1% nano zero-valent Iron, 2% modified molybdenum disulfide, the sum of the content percentages of the above-mentioned components is 100%;

[0041]Wherein the preparation method of the humic acid resin is: pulverize sodium sulfonated humate, pass through a 150 mesh sieve, mix the pulverized sodium sulfonated humate with phenolic resin and hydrochloric acid in a mass ratio of 1:2:1, mix After uniformity, cross-link and solidify at 400°C for 5 hours, wash with deionized water until colorless, dry, grind, and sieve, then soak the crude humic acid resin in calcium acetat...

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Abstract

The invention discloses a soil conditioner for treating heavy metal pollution of cultivated land, and relates to the technical field of soil conditioners. The soil conditioner is prepared from the following raw materials in percentage: 25 to 30 percent of plant ash, 4 to 6 percent of calcium magnesium phosphate fertilizer, 4 to 6 percent of quick lime, 15 to 18 percent of zeolite, 2 to 4 percent of hydroxyapatite, 20 to 22 percent of organic fertilizer, 3 to 5 percent of composite algae powder, 10 to 13 percent of humic acid resin, 5 to 8 percent of sodium-based modified bentonite, 1 to 2 percent of magnesium silicate and 3 to 4 percent of potassium sulfoselenide. The soil conditioner comprises, by weight, 1-2% of nano zero-valent iron and 2-3% of modified molybdenum disulfide, the sum of the content percentages of all the parts is 100%, and the soil conditioner is quick, efficient and safe in heavy metal polluted farmland remediation and can be widely applied.

Description

technical field [0001] The invention relates to the technical field of soil conditioners, in particular to a soil conditioner for treating heavy metal pollution in cultivated land and a preparation method thereof. Background technique [0002] Heavy metal pollution in cultivated land is soil pollution caused by excessive deposition of heavy metals in the soil. Heavy metals polluting farmland soil mainly include cadmium, lead and other elements with significant biological toxicity. Mainly from mining waste, pesticides, wastewater, sludge and atmospheric deposition. The content of heavy metals in the soil increases, leading to comprehensive environmental problems such as the decline of soil productivity, the pollution of agricultural products, and the destruction of the ecological environment. Among them, cadmium is one of the most toxic heavy metals in the environment and the most commonly polluted farmland. After the heavy metals in the soil are absorbed by plants, they ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C05G3/80C05G5/12
CPCC09K17/40C05G3/80C05G5/12C05B13/02C09K2101/00C05B17/00C05D1/00C05D3/02C05D5/00C05D9/00C05D9/02C05F11/00C05F11/02C05G1/00
Inventor 陈鸿哲国彬孙秋彬李国富陈泽宇
Owner GUANGZHOU XINNONGKE FERTILIZER SCI & TECH
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