In order to break the complex bonds and treat the organic wastewater containing heavy metal,such as Cu-EDTA solution,a novel process of Fe-C micro-electrolysis was proposed.Based on the principle of iron-carbon micro-...In order to break the complex bonds and treat the organic wastewater containing heavy metal,such as Cu-EDTA solution,a novel process of Fe-C micro-electrolysis was proposed.Based on the principle of iron-carbon micro-electrolysis reaction,-OH radicals which were generated under the acidic aerobic condition during the micro-electrolysis process attacked to the organic groups of coordination compounds,which resulted in complex bonds breaking.Therefore copper（Ⅱ） ions were removed via nascent gelatinous ferric hydroxide and ferrous hydroxide,and EDTA was degraded by-OH radicals.Effects of pH value,temperature,electrolysis time and mass ratio of Fe to C on residual concentrations of total organic carbon（TOC） and Cu（Ⅱ） were studied.The mechanism of Fe-C micro-electrolysis was investigated and verified by analyzing micrographs of scanning electron microscopy（SEM）,energy dispersive analysis（EDS） and Fourier transform infrared spectrometry（FTIR）.The removal efficiency is optimal at pH value of 2.0,temperature of 25 °C,the mass ratio Fe to C of 0.02,and reaction time of 60 min.Under above conditions,the concentration of TOC decreases from 200 mg/L to 40.66 mg/L and the residual concentration of Cu（Ⅱ） decreases from initial 60 mg/L to 1.718 mg/L.展开更多
基金Project (50925417) supported by China National Funds for Distinguished Young ScientistsProject (50830301) supported by the National Natural Science Foundation of China+1 种基金Project (2007BAC25B01) supported by the National Key Project of Science and Technical Supporting Programs Funded by Ministry of Science and Technology of China during the 11th Five-year PlanProject (2009ZX07212-001-01) supported by the Major Science and Technology Program for Water Pollution Control and Treatment,China
文摘In order to break the complex bonds and treat the organic wastewater containing heavy metal,such as Cu-EDTA solution,a novel process of Fe-C micro-electrolysis was proposed.Based on the principle of iron-carbon micro-electrolysis reaction,-OH radicals which were generated under the acidic aerobic condition during the micro-electrolysis process attacked to the organic groups of coordination compounds,which resulted in complex bonds breaking.Therefore copper（Ⅱ） ions were removed via nascent gelatinous ferric hydroxide and ferrous hydroxide,and EDTA was degraded by-OH radicals.Effects of pH value,temperature,electrolysis time and mass ratio of Fe to C on residual concentrations of total organic carbon（TOC） and Cu（Ⅱ） were studied.The mechanism of Fe-C micro-electrolysis was investigated and verified by analyzing micrographs of scanning electron microscopy（SEM）,energy dispersive analysis（EDS） and Fourier transform infrared spectrometry（FTIR）.The removal efficiency is optimal at pH value of 2.0,temperature of 25 °C,the mass ratio Fe to C of 0.02,and reaction time of 60 min.Under above conditions,the concentration of TOC decreases from 200 mg/L to 40.66 mg/L and the residual concentration of Cu（Ⅱ） decreases from initial 60 mg/L to 1.718 mg/L.
