Microbial fuel cell potted plant and method for in-situ remediation of soil chromium pollution

Abstract

The invention discloses a microbial fuel cell bonsai and a method for in-situ hexavalent chromium-polluted soil remediation. The microbial fuel cell bonsai comprises a flowerpot and a plant planted in the flowerpot, and the structure of the wall of the flowerpot is composed of a plastic reticular film layer, a graphite cathode layer, a glass fiber layer and a graphite anode layer sequentially form the outside to the inside; the graphite cathode layer and the graphite anode layer are connected with a storage battery through wires, and the storage battery is connected with a light source; the mixture of unpolluted soil and activated sludge is filled in the flowerpot. The invention is an in-situ soil remediation technique which utilizes the mechanism of the cathodic reduction of the microbial fuel cell (MFC), the MFC is a new technique which can convert organic matter energy into electric energy, and thereby the microbial fuel cell bonsai not only can reduce hexavalent chromium by means of the cathode, but also can generate and store electric energy.

Description

technical field [0001] The invention relates to soil microbial fuel cell technology, in particular to a microbial fuel cell potted plant for in-situ restoration of soil hexavalent chromium pollution. Background technique [0002] Chromium compounds can produce toxic effects, among which hexavalent chromium, which has the ability to oxidize and penetrate the body membrane, is the most toxic, 100 times that of trivalent chromium, causing great toxicity to the human body, organisms and vegetation, leading to skin cancer, glandular diseases such as cancer. [0003] Chromium pollution in soil is due to its carrier, which makes its treatment more difficult. Today's soil hexavalent chromium pollution can be divided into two categories, the lower layer is slightly polluted soil, and the upper layer is heavily polluted soil. The main treatment method for the lightly polluted soil in the lower layer is bioremediation. A large number of trees and grasses suitable for the local enviro...

AI Technical Summary

Problems solved by technology

[0006] However, it is difficult to apply in-situ ecological restoration to the heavily polluted upper soil. The current conventional method is to remove the upper soil as a whole for extraction until the soil reaches the pollution control index limit of general industrial solid waste landfill, and then send it to the landfill for disposal. The detoxification solution is processed separately

This method needs to use a lot of manpower, material and financial resources, requires multiple treatments, the process is cumbersome, and has a lot of impact on the local environment

Images