Method for evaluating combined remediation of cadmium-contaminated soil by utilizing lawn grass microorganisms

Abstract

The invention belongs to the field of pollution control and discloses a method for evaluating combined remediation of cadmium-contaminated soil by utilizing lawn grass microorganisms. The method comprises the following steps: performing mixed sowing on ryegrass and carpet grass seeds with a mass ratio of 1:0.5-1:2 in soil with a cadmium concentration of 10 mg / kg and adding Bacillus sp.T3 and Pseudomonas fluorescens Y5 compound bacteria agents with a volume ratio of 1:1-1:5 into ryegrass and carpet grass root system soil when the seeds germinate until two leaves fully expand, wherein the inoculation amount is 0.6-1.5 L / m<2>; harvesting ryegrass and carpet grass after 50 days, performing combined removal on cadmium in the soil by utilizing the absorption of mixed sowing lawn grass for the cadmium and the strengthening effects of the microbial compound bacteria agents; detecting the content of the cadmium in the soil by adopting a microbial sensor. The method provided by the invention hasthe beneficial effects that the removal effect of the cadmium-contaminated soil is enhanced, and the evaluation accuracy of the cadmium-contaminated soil is greatly improved.

Description

Technical field [0001] The invention belongs to the field of pollution control, and in particular relates to an evaluation method for using turfgrass and microorganisms to repair cadmium contaminated soil. Background technique [0002] Cadmium is a silvery-white shiny metal with greater toxicity. Water and food contaminated by cadmium are harmful to the human body. Japan once suffered from "pain-pain" due to cadmium poisoning. Cadmium can cause irritation to the respiratory tract. Long-term exposure can cause anosmia, gingival macula or yellow circle. Cadmium compounds are not easily absorbed by the intestines, but can be absorbed by the body through breathing and accumulate in the liver or kidneys, causing harm, especially Kidney damage is the most obvious. In addition, it can also lead to osteoporosis and softening. In recent years, both in China and in the world, the control and reduction of environmental pollution caused by heavy metals has become a focal issue. Traditiona...

AI Technical Summary

Problems solved by technology

The chemical method has the characteristics of high sensitivity and high accuracy, but because it only simulates the bioavailability of heavy metals, it does not detect the real bioavailability of heavy metals, so it does not have the ability to reflect the real environmental risk of heavy metals

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