Remover for removing mercury and cadmium ions in saline-alkali soil and preparation method thereof

Abstract

The invention discloses a remover for removing mercury and cadmium ions in saline-alkali soil and a preparation method thereof. The remover comprises the following raw materials in parts by weight: 30to 50 parts of ultrafine mineral-originated humus powder, 5 to 10 parts of white-rot fungus liquid, 6-10 parts of an arbuscular mycorrhizal fungus root system inoculant, 5-10 parts of citric acid, 2-5 parts of soil moisture preservation agent, 20-30 parts of glutinous rice wine residue powder, 1-5 parts of a soil moisture preserving agent. The ultrafine mineral-originated humus powder can loosensoil and improve air permeability and water permeability, and is rich in element amount, and a carbon source and a nitrogen source included in the ultrafine mineral-originated humus powder provide nutrients required by microbial growth; the soil moisture preservation agent has strong water retention and storage effects, and can reduce the evaporation speed of water in soil; the arbuscular mycorrhizal fungus root system inoculant can inhibit heavy metal ion absorption of crops; white-rot fungi can degrade heavy metal ions in soil; and citric acid can adsorb heavy metals in soil in a short time,and the acidity of the citric acid can reduce the pH value of the saline-alkali soil.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement, in particular to a soil mercury and cadmium ion remover for saline-alkali soil and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of social economy, the content of heavy metals in soil has been increasing, and soil heavy metal pollution has become a common environmental problem and has attracted more and more attention. Looking back at the heavy metal soil pollution incidents in my country in recent years, it is not difficult to find that heavy metals such as mercury and cadmium are the main ones. It has brought a serious threat to the ecological environment and food safety, and at the same time, it is also a difficulty in the prevention and restoration of soil pollution. According to official data in 2014, the area of ​​cultivated land contaminated by mercury in Wanshan was about 100,000 mu, involving a population of...

AI Technical Summary

Problems solved by technology

[0003] Soil heavy metal pollution control technologies mainly include phytoremediation, microbial remediation, chemical remediation and physical remediation, etc. Among them, phytoremediation technology has the advantages of low cost and green environmental protection, but it takes a long time to repair; most of the microbial remediation only targets Degradation does not consider reducing the absorption of crops, and the simple microbial restoration cycle is relatively long; the advantage of chemical restoration is that it can remove pollutants in the soil, but the disadvantage is that there may be secondary pollution; the restoration efficiency of physical restoration techniques such as soil replacement and guest soil High, but it only transfers the pollutants from A to B, the repair cost is high, and the risk in the transfer process is relatively high

Images