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Soil heavy metal repairing agent

A technology of heavy metals and remediation agents, applied in soil conditioning materials, organic fertilizers, fertilizer mixtures, etc., to improve the physical and chemical properties of soil, prevent the precipitation of heavy metal ions, and reduce the activity of heavy metals

Active Publication Date: 2015-04-29
湖南神隆海洋生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country has a lot of people and little land, and the contradiction between people and land is prominent. At this stage, it is unlikely to use green and environmentally friendly phytoremediation to carry out large-scale ecological reconstruction of heavy metal polluted cultivated land.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Active calcium magnesium phosphate fertilizer 35%, potassium silicate 15%, magnesium sulfate monohydrate 8%, zinc sulfate monohydrate 0.5%, boric acid 1%, carboxymethyl chitosan 3%, amino acid 3%, bentonite 15%, sea foam Stone 19.5%.

[0042] Preparation method: uniformly mix carboxymethyl chitosan, amino acid, zinc sulfate monohydrate, and boric acid, then mix with magnesium sulfate monohydrate, active calcium magnesium phosphate fertilizer, and potassium silicate in sequence, and finally mix with bentonite and sepiolite, Mix well.

Embodiment 2

[0044] Superphosphate 31.2%, potassium silicate 20%, magnesium sulfate monohydrate 15%, zinc sulfate monohydrate 0.3%, borax 3%, manganese sulfate 1%, polyacrylamide 0.5%, humic acid 2%, attapulgite 10 %, bentonite 17%.

[0045] Preparation method: Mix polyacrylamide, humic acid, zinc sulfate monohydrate, borax, and manganese sulfate evenly, then mix them with superphosphate, potassium silicate, and magnesium sulfate monohydrate in sequence, and finally mix them with bentonite and attapulgite, Mix well.

Embodiment 3

[0047] Calcium magnesium phosphate fertilizer 37%, calcium oxide 15%, sodium silicate 8%, magnesium sulfate monohydrate 5%, zinc sulfate monohydrate 0.5%, boric acid 2%, sodium molybdate 0.7%, polyacrylamide 0.3%, polychlorinated Iron 1%, activated carbon 5%, attapulgite 10%, sepiolite 15.5%.

[0048] Preparation method: uniformly mix polyacrylamide, polyferric chloride, activated carbon, zinc sulfate monohydrate, boric acid, and sodium molybdate, then mix with calcium magnesium phosphate fertilizer, calcium oxide, sodium silicate, and magnesium sulfate monohydrate in sequence, and finally Mix evenly with sepiolite and attapulgite.

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Abstract

The invention belongs to the field of environmental protection and discloses a soil heavy metal repairing agent and a preparation method thereof. The soil heavy metal repairing agent comprises a high molecular polymer and a filler, wherein the high molecular polymer can form a stable chelate compound with heavy metal ions to effectively adsorb and fix free heavy metal ions in soil, reduce the activity of heavy metals, stop crop absorption and control the migration of the heavy metals by virtue of adsorption of the filler. The preparation method of the soil heavy metal repairing agent disclosed by the invention is simple to operate and suitable for industrial production. A test result shows that the soil heavy metal repairing agent disclosed by the invention can reduce the activity of the heavy metals in soil, improve the physical and chemical properties of the soil, reduce the acidity of the soil and improve the soil fertility to promote the growth of rice, improve the yield of the rice and reduce the content of the heavy metals including cadmium, lead and arsenic in the rice so as to ensure that the content of the heavy metals including cadmium, lead and arsenic in the rice is less than a safe value of 0.2mg / kg.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a soil heavy metal restoration agent. Background technique [0002] Heavy metal pollution of the soil refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. Heavy metal pollution in farmland soil is extremely harmful. Heavy metal pollution in soil will not only reduce crop yield and quality, but also enter the human body through the soil-plant system and the food chain, endangering human health and life safety. Soil heavy metal pollution has the characteristics of concealment, hazard lag, long-term nature, and bioaccumulation of heavy metals in the biological chain. These determine that if the understanding and treatment of soil heavy metal pollution are delayed, it will bring unpredictable and se...

Claims

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Application Information

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IPC IPC(8): C09K17/40C05G3/04C09K101/00C05G3/80
Inventor 钟积东马国辉吕洋周艳万强宋世文丁子辉谭放军
Owner 湖南神隆海洋生物工程有限公司
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