Soil restoration fertilizer with passivated heavy metal mobility

Abstract

The invention discloses a soil restoration fertilizer with the passivated heavy metal mobility. The soil restoration fertilizer with the passivated heavy metal mobility is prepared from, by weight, 20-24 parts of paulownia sawdust, 34-36 parts of Chinese medicine residues, 4-5 parts of gelatin, 16-18 parts of kaolin, 1-2 parts of sodium polyphosphate, 1-2 parts of polymeric aluminum chloride, 1-3 parts of zinc chloride, 48-50 parts of eucalyptus sawdust, 12-14 parts of siderite slag, 12-14 parts of limonite slag, 45-55 parts of orange peel, 3-4 parts of an EM composite microbial agent and a proper amount of water. The soil restoration fertilizer is modified through mixed calcination of kaolin and sodium polyphosphate, the buffering capacity of soil in use is improved, the adsorption capacity of soil for heavy metal is enhanced, migration of heavy metal in soil to plants is inhibited, eating safety of crop products is guaranteed, meanwhile, the conditions of leaching, infiltration and the like of heavy metal can be reduced, underground water resources are prevented from being polluted, and health of a soil ecological environment is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of fertilizers, in particular to a soil remediation fertilizer capable of passivating the migration of heavy metals. Background technique [0002] With the rapid economic development and the advancement of industrial technology, the adverse effects of industrial and agricultural production on the environment are increasing. As solid wastes are continuously stacked and dumped on the soil surface, hazardous waste water continues to penetrate into the soil, and harmful gases and dust in the atmosphere It also continued to fall into the soil with rain, causing soil pollution. Not only reduces the yield and quality of crops, but also indirectly harms human health. [0003] The control of soil pollution is mainly through engineering remediation methods and phytoremediation methods. The engineering remediation methods mainly include soil modification, electric remediation, soil leaching and heat treatment. Engineering tr...

AI Technical Summary

Problems solved by technology

Not only reduces the yield and quality of crops, but also indirectly endangers human health

[0003] The control of soil pollution is mainly through engineering restoration methods and phytoremediation methods, of which engineering restoration methods mainly include soil improvement methods, electric restoration, soil leaching and heat treatment methods, etc. Engineering treatment measures are usually suitable for small polluted areas and serious pollutants. And the effect of the soil that is easy to spread is more obvious, which can fundamentally improve the soil, but the cost of treatment is high, and it is easy to form secondary pollution, and may damage the soil structure, which may easily lead to a decline in soil fertility

Phytoremediation technology is usually low-cost and can improve soil organic matter content and soil fertility, but plants have limited tolerance to heavy metal pollutants and are only suitable for moderately polluted soil remediation. At the same time, a plant can usually only remediate a certain heavy metal pollution Soil, and it is possible to activate other heavy metals in the soil. It is not effective for the compound pollution of various metals and organic substances. Hyperaccumulators grow slowly, and the restoration period is usually long, which is difficult to meet the requirements of rapid restoration of soil pollution.