Environmentally-friendly stabilizing agent for heavy metals in soil

Abstract

The invention discloses an environmentally-friendly stabilizing agent for heavy metals in soil. The environmentally-friendly stabilizing agent is prepared from the following materials by weight: 15-33parts of sodium dihydrogen phosphate, 20-31 parts of bentonite, 14-31 parts of potassium chloride, 11 -21 parts of polyvinyl alcohol, 14-31 parts of diethylenetriamine pentaacetic acid, 8-40 parts ofcarbide slag, 25-40 parts of mushroom residues, 15-28 parts of carboxymethyl chitosan, 17-31 parts of polyacrylamide, 7-11 parts of calcium magnesium phosphate fertilizer, 28-33 parts of calcium superphosphate, 13-23 parts of boric acid, 28-37 parts of zinc sulfate, 11-21 parts of amino acids, 9-14 parts of humic acid, 13-18 parts of a compound enzyme preparation, 4-6 parts of slash pine needlesand 4-6 parts of Pseudomonas fluorescens powder. The stabilizing agent for heavy metals in soil can be coordinated with various heavy metal ions to form a cross-linked netted chelate and passivate andstabilize various heavy metals in soil so as to reduce soil acidity and improve soil fertility; and thus, the purposes of improving soil fertility, enhancing soil properties and preventing soil passivation are achieved, and composite heavy metal pollutants are allowed to be stable and environment-friendly.

Description

technical field [0001] The invention specifically relates to the technical field of treatment and restoration of heavy metal polluted soil, in particular to an environmental protection soil heavy metal stabilizer. Background technique [0002] Heavy metal pollution in my country's environment has become more serious and widespread. Heavy metal pollution in the environment not only affects the yield and quality of crops and aquatic products, but also affects the quality of the atmosphere and water environment, and can endanger human life and health through the food chain. Due to the complex sources of heavy metals, the different forms of heavy metals in the environment, the interaction between different heavy metals and with other pollutants, the complexity of generating various complex pollution increases the difficulty of heavy metal research, and the harm of heavy metals to animals, plants and human body has Long-term, latent and irreversible. [0003] Therefore, heavy me...

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Problems solved by technology

[0004] 1. Soil heavy metal soil heavy metal remediation agent and its application to joint-contaminated soil-CN201310677528.8, which can be used to increase the yield of plants such as peppers on heavy metal-contaminated soil, but cannot effectively adsorb and fix free heavy metal ions in the soil , to neutralize the acidity of the soil

[0005] 2. Soil heavy metal soil heavy metal remediation agent and its application to highly polluted soil-CN201310677304.7, which can be used to improve the growth and / or quality of plants such as bitter melon on heavy metal polluted soil, but also cannot effectively remove The free heavy metal ions are adsorbed and fixed to neutralize the acidity of the soil

[0006] 3. Soil heavy metal remediation agent and its application-CN201310200934.5, which can remediate chromium and / or cadmium (and / or lead) pollution in soil, improve the chromium and / or cadmium (and / or lead) residues of planted plants, And it has a synergistic effect, but it also cannot neutralize the acidity of the soil, and cannot make the heavy metals in the soil adsorb or be chelated or degraded

[0008] 5. The combined application of zinc-selenium agricultural preparations and soil heavy metal remediation agents-CN201310677949.0, in addition to increasing plant yield, can also enhance the effect of soil heavy metal remediation agents, and significantly reduce heavy metals such as cadmium in plants (especially plant seeds) content, unable to neutralize the acidity of the soil, and unable to adsorb, chelate or degrade heavy metals in the soil

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