Other reactions that may occur are as follows:
equation(3)
H2O2 + radical dotOH → H2O + HO2radical dot
equation(4)
Fe2+ + radical dotOH → OH− + Fe3+
Most pollutants can be successfully eliminated or converted to non-toxic materials by methods based on the electrochemical principles. Electrochemical depolluting methods are mainly electrodialysis, electrocoagulation, electroflotation, anodic processes, cathodic processes and electrochemical advanced oxidation processes [15]. Recently the applications of the Peroxi Electrocoagulation Process (PEP) as electrochemical method in Fenton process have been reported. This process is efficient and less expensive that has been used to detoxifying herbicide, pesticide and insecticide containing wastewaters, and polishing biological effluent of a petrochemical wastewater as well. This combined process has several distinct advantages. Coagulants introduced without corresponding sulfate or chloride ions are more efficient at removing contaminants from water. By eliminating competing anions and using a highly pure coagulant source, lower metals residuals are obtained and less sludge is produced than when metal salts are utilized. A contaminant free ion source allows maximum removal of the various dissolved forms of pollutant that could be present and require treatment. This method is based on the generation of a powerful oxidant, the hydroxyl radical (radical dotOH), which radical dotOH radicals attack the organic substrates present in the wastewater and then degrade them. In this method H2O2 is externally applied into the electrocoagulation system while a sacrificial Fe anode is used as Fe2+ source and Fenton reactive was formed in the process. Moreover, Fe2+ may be continuously regenerated at cathode depending on the setup of electrolytic cell [10], [16] and [17]. In electrocoagulation process, two mechanisms for the production of the metal hydroxides are including:
ปฏิกิริยาอื่น ๆ ที่อาจเกิดขึ้นมีดัง:equation(3)H2O2 + รุนแรง dotOH → H2O + HO2radical จุดequation(4)Fe2 + + รุนแรง dotOH → OH− + Fe3 +Most pollutants can be successfully eliminated or converted to non-toxic materials by methods based on the electrochemical principles. Electrochemical depolluting methods are mainly electrodialysis, electrocoagulation, electroflotation, anodic processes, cathodic processes and electrochemical advanced oxidation processes [15]. Recently the applications of the Peroxi Electrocoagulation Process (PEP) as electrochemical method in Fenton process have been reported. This process is efficient and less expensive that has been used to detoxifying herbicide, pesticide and insecticide containing wastewaters, and polishing biological effluent of a petrochemical wastewater as well. This combined process has several distinct advantages. Coagulants introduced without corresponding sulfate or chloride ions are more efficient at removing contaminants from water. By eliminating competing anions and using a highly pure coagulant source, lower metals residuals are obtained and less sludge is produced than when metal salts are utilized. A contaminant free ion source allows maximum removal of the various dissolved forms of pollutant that could be present and require treatment. This method is based on the generation of a powerful oxidant, the hydroxyl radical (radical dotOH), which radical dotOH radicals attack the organic substrates present in the wastewater and then degrade them. In this method H2O2 is externally applied into the electrocoagulation system while a sacrificial Fe anode is used as Fe2+ source and Fenton reactive was formed in the process. Moreover, Fe2+ may be continuously regenerated at cathode depending on the setup of electrolytic cell [10], [16] and [17]. In electrocoagulation process, two mechanisms for the production of the metal hydroxides are including:
การแปล กรุณารอสักครู่..
