Heavy metal repairing agent for improving ion exchange capacity of soil

Abstract

The invention discloses a heavy metal repairing agent for improving ion exchange capacity of soil. The heavy metal repairing agent is prepared from the following raw materials in parts by weight: 36-39 parts of activated sludge, 7-9 parts of ammonium nitrate, 2-3 parts of zinc sulfate, 5-7 parts of dextrin, 12-14 parts of soybean powder, 88-94 parts of sunflower husks without seeds, 32-34 parts of rice straw, 15-18 parts of kaolin, 9-11 parts of calcium carbonate, 24-25 parts of needles of pinus ellottii engeim and a proper amount of water. By adopting the soil repairing agent disclosed by the invention, problems that a conventional heavy metal polluted soil repairing method is high in cost, secondary pollution can be easily caused and the operation is complex can be solved; organic matters which are cheap and easy to obtain are adopted as raw materials, and under the action of a great amount of active groups in activated sludge and charcoal, the cation exchange capacity of soil can be increased, the effectiveness of heavy metals can be passivated, the capability that exchangeable nutrients are absorbed, held and supplied by soil can be improved, and furthermore the purpose of repairing and treating polluted soil can be achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a heavy metal remediation agent for improving soil ion exchange capacity. Background technique [0002] The sources of heavy metal pollution in my country mainly include industrial "three wastes" discharge, seepage of household garbage, household coal burning, and vehicle exhaust emissions. Industries such as electroplating, plastics, chemicals, and mineral smelting and processing are the main industrial sources of heavy metals. The release of coal combustion is also one of the important causes of soil heavy metal pollution. Motor vehicle exhaust can also significantly cause heavy metal pollution in the soil on both sides of the road. The content of some heavy metal elements in municipal solid waste exceeds the standard, and long-term stacking will also cause heavy metals to leak into the soil, resulting in an increase in local heavy metal content in regional soil. In a...

AI Technical Summary

Problems solved by technology

Heavy metal elements are easy to combine with the sulfhydryl group in the active part of the enzyme, and the metal element will replace the essential elements in the sulfur protein, such as Mg2+, Ca2+ and other biologically necessary elements. The antioxidant system in the system wreaks havoc

[0004] At present, the remediation technology of heavy metal-contaminated soil mainly adopts chemical means, but a large number of chemical agents used in the remediation process can easily cause soil re-pollution