Research on the Characteristics and Treatment Methods of Soil Heavy Metal Pollution
This article briefly introduces the characteristics of soil mixed with high levels of heavy metals,and summarizes the technical methods for adjusting soil heavy metal content and reducing soil pollution from physical and biological aspects.Taking microbial method as an example,combined with electric method,comprehensive treatment of nickel containing soil is carried out,and technical practice analysis is carried out.Through practice,it has been found that in the case mining area,a nickel content of 50 mg/kg is beneficial for the growth of halophytic grass.When the nickel content is higher than 50 mg/kg,it has a certain inhibitory effect on the growth of halophytic grass.Using a combination of electric and microbiological methods to treat nickel metal,when the voltage is within the range of 0 to 1.5 V/cm,the soil pH value will fluctuate and gradually decrease.After 2 weeks of treatment,the nickel content was the lowest under a voltage of 1.5 V/cm,and the treatment effect was the best.Using the joint rule of law to manage nickel metal,within 2 weeks of treatment,the proportion of residual nickel increased and the proportion of exchangeable nickel decreased,making its state more stable and achieving significant technical results.
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