Strong oxidation coupled short range treatment of refining industry contaminated sites extraction water
The types of pollutants extracted from refinery pollution site are complex and highly toxic,with strong uncertainty in water quality and quantity.Rapid and standardized treatment and on-site reuse are one of the ideal treatment and disposal methods,and efficient treatment technologies and operating parameters need to be optimized to shorten the treatment process.The optimal conditions for Fenton and optoelectronic coupling treatment through orthogonal experiments to form a short-range treatment process for extracted water were investigated.The results showed that the key influencing factor of chemical Fenton was the mass ratio of H2O2 to organic pollutants(characterized by COD).Coupled with ultraviolet light irradiation,the efficiency of the agent could be improved and the amount of sludge could be reduced.The key electrochemical influencing factor was the distance between the electrode plates,followed by the type of electrode plates.Under the optimal treatment conditions determined by orthogonal experiments,the coupled process could achieve a total removal efficiencies of 88.33％for TOC and 98.09％for TN in the extracted water,which could meet the requirements of on-site reuse water index(≤40mg/L)for TN in the effluent.The Fenton and photoelectric coupling treatment formed could significantly shorten the existing treatment process,reduce the dosage of chemicals,thereby reducing the amount of sludge,and ensure the stability and compliance of the effluent.This study indicated that Fenton and photoelectric coupling technology can quickly and efficiently remove high concentration of pollutants from the extracted water of refinery pollution sites,supporting the rapid implementation of contaminated site remediation projects.At the same time,it can avoid environmental risks of sewage transportation and impact on the advanced processes of sewage treatment plants,providing important references for the selection of efficient and rapid treatment processes on site and the adjustment of operating parameters.
refinery pollution siteextraction waterphoto-fentonelectrochemistryphotoelectric couplingshort range processing
万方数据
维普
