Heavy metal treating agent for soil

Abstract

The invention discloses a heavy metal treating agent for soil. The heavy metal treating agent comprises the following components in percentage by weight: 30 to 40 percent of clay minerals, 30 to 40 percent of organic fertilizer, and 20 to 40 percent of algae. In the heavy metal treating agent for soil, the algae is a plant which lives in sea water for a long time, has good adsorption and fixing effect to heavy metals, can quickly adsorb the heavy metals in the soil when entering the soil polluted by heavy metals, and enables the heavy metals to loss bioactivity by combination effect of organic matters in the organic fertilizer, so that absorption of plants and animals to heavy metals can be reduced, beneficial elements in the clay minerals can be replaced through crystal replacement by utilizing the porous property of the clay minerals, and inactivated heavy metal elements can enter the clay minerals to achieve the effect of treating heavy metal polluted soil.

Description

technical field [0001] The invention relates to a heavy metal treatment agent for soil. Background technique [0002] Heavy metals are those with a density greater than 4 (g / cm 3 ) metals, which mostly exist in the form of compounds in nature. With the mining, smelting, processing and commercial manufacture of heavy metals by humans, many heavy metals such as lead, cadmium, mercury, etc. enter the atmosphere, water or soil, causing serious Heavy metal pollution. Soil is an important natural resource for human survival and development. Heavy metal pollution of soil will directly affect human health and the entire terrestrial ecosystem. Heavy metal pollution is different from organic pollution. Heavy metals themselves are difficult to be degraded, and they are easily enriched by plants or animals. Therefore, the treatment of heavy metal pollution in soil is difficult. At present, the commonly used treatment of heavy metal pollution in soil adopts agro-ecological engineering...

AI Technical Summary

Problems solved by technology

Heavy metal pollution is different from organic pollution. Heavy metals themselves are difficult to degrade, and are easy to be enriched by plants or animals. Therefore, it is difficult to treat heavy metal pollution in soil.

At present, the commonly used soil heavy metal pollution treatment adopts agricultural ecological engineering measures to breed special plants and microorganisms on the soil polluted by heavy metals, and these special plants and microorganisms absorb or degrade the heavy metals in the soil, so as to achieve the purpose of purifying the soil. purpose, but this method takes a long time to treat and is slow to take effect, which will make the treated soil lose its use value for a long time

Some people have proposed to use physical and physical chemical principles to treat heavy metal polluted soil, such as isolation method, cleaning method, heat treatment, electrochemical method, etc., which can quickly, thoroughly and stably solve the problem of soil heavy metal pollution, but this method has high one-time investment and no Return on investment, it is difficult to promote the application in daily operations