Chromium-contaminated soil restoring fertilizer

Abstract

The invention discloses chromium-contaminated soil restoring fertilizer which is prepared from, by weight, 13-15 parts of straw fibers, 28-30 parts of castor cakes, 24-26 parts of animal broken bone powder, 1-3 parts of sodium tripolyphosphate, 2-3 parts of ferrous sulfate, 22-25 parts of flax fiber beams, 23-25 parts of spathic iron slag, 23-25 parts of limonite slag, 75-80 parts of orange peel, 3-4 parts of an EM compound microbial agent and a proper amount of water. According to the soil restoring fertilizer, multiple materials are adopted and matched, through the chelation and adsorption functions of sodium tripolyphosphate, charcoal and the like, the harm of heavy metal to soil is lowered, ferrous sulfate and the like are added and jointly act with microorganisms and organic matter, reduction of hexavalent chromium in the soil into nontoxic hexavalent chromium is promoted, meanwhile the content of effective nutritious elements in the soil is increased, the purpose of restoring soil contaminated by heavy metal, especially chromium is achieved, and the chromium-contaminated soil restoring fertilizer has quite good application and popularization value.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a chromium-contaminated soil restoration fertilizer. Background technique [0002] With the rapid development of the economy and the advancement of industrial technology, the adverse impacts of industrial and agricultural production on the environment have been increasing. Due to the continuous accumulation and dumping of solid waste on the soil surface, harmful waste water has continuously penetrated into the soil, harmful gases and dust in the atmosphere It also continues to fall into the soil with rainwater, causing soil pollution. It 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 trea...

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.