Method for carrying out in-situ remediation on underground water nitrate pollution by adopting iron fuel cell

Abstract

The invention discloses a method for carrying out in-situ remediation on underground water nitrate pollution by adopting an iron fuel cell. The method is characterized in that a double-chamber iron fuel cell is constructed, wherein an anode is arranged in an anode chamber filled with a pH buffer solution, an underground water-containing layer polluted by nitrate in an anaerobic environment is used as a cathode chamber, and a cathode is arranged in the cathode chamber; the anode and the cathode are connected by a lead, and a connecting resistor is connected in the lead in series; and both ends of a salt bridge are respectively soaked in the solutions of the anode chamber and the cathode chamber. The method has the advantages of simple structure, no organic carbon source, microbial strain or any other chemical substance needs to be added into the underground water, operation and maintenance are convenient, the method is quick to start, the nitrate degradation speed is high, the pollution remediation period of the underground water is short, the construction investment and the running cost are low, and no secondary pollution is generated.

Description

technical field [0001] The invention relates to a method for in-situ restoration of nitrate pollution in groundwater, in particular to a method for removing nitrate nitrogen in groundwater by using electron reduction provided by an iron fuel cell without the participation of organisms. Background technique [0002] Groundwater is not only an important part of the hydrological cycle, but also an important freshwater resource for human beings, and even the only source of drinking water for many people. 68% of the fresh water available to people in the world is groundwater, and about 50% of the population uses groundwater. For drinking water source. However, due to the discharge and leakage of domestic sewage and industrial wastewater, excessive use of agricultural chemical fertilizers and pesticides, and the soil has high mineral solubility and low water holding capacity, nitrate can easily seep into groundwater with rain or farmland irrigation Cause irreversible nitrate poll...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the existing groundwater nitrate pollution restoration technology, and provide a method that does not require the participation of microorganisms, does not need to add organic carbon sources, has good treatment effect, low cost, convenient operation control and maintenance, and no secondary pollution. Method for in-situ remediation of nitrate-contaminated groundwater using iron fuel cells

Images