Bimetallic Fe-Co/GAC （granular activated carbon） was prepared and used as heterogeneous catalyst in the ultrasound enhanced heterogeneous activation of peroxydisulfate （PS, S2O8 2-） process. The effect of initial ...Bimetallic Fe-Co/GAC （granular activated carbon） was prepared and used as heterogeneous catalyst in the ultrasound enhanced heterogeneous activation of peroxydisulfate （PS, S2O8 2-） process. The effect of initial pH, PS concentration, catalyst addition and stirring rate on the decolorization of Acid Orange 7 （AO7） was investigated. The results showed that the decolorization efficiency increased with an increase in PS concentration from 0.3 to 0.5 g/L and an increase in catalyst amount from 0.5 to 0.8 g/L. But further increase in PS concentration and catalyst addition would result in an unpronounced increase in decolorization efficiency. In the range of 300 to 900 r/min, stirring rate had little effect on AO7 decolorization. The catalyst stability was evaluated by measuring decolorization efficiency for four successive cycles.展开更多
文章进行了UV/H2O2/GAC和GAC系统用于微污染水深度处理的试验研究,结果表明:UV/H2O2/GAC对UV254和TOC均有良好的去除效果,当H2O2投量3.0 mg/L,UV/H2O2反应器停留时间20 m in时,系统的COD和UV254去除率为44.6%和72.8%。UV/H2O2主要作用...文章进行了UV/H2O2/GAC和GAC系统用于微污染水深度处理的试验研究,结果表明:UV/H2O2/GAC对UV254和TOC均有良好的去除效果,当H2O2投量3.0 mg/L,UV/H2O2反应器停留时间20 m in时,系统的COD和UV254去除率为44.6%和72.8%。UV/H2O2主要作用在于改善了GAC对有机物的吸附,产生了羟基自由基,从而提高了去除效果。展开更多
基金supported by the National Natural Science Foundation of China (No. 20977069, 21211130108)the Natural Science Foundation of Hubei Province, China through "The Outstanding Youth Scholars Program" (No. 2007ABB028)
文摘Bimetallic Fe-Co/GAC （granular activated carbon） was prepared and used as heterogeneous catalyst in the ultrasound enhanced heterogeneous activation of peroxydisulfate （PS, S2O8 2-） process. The effect of initial pH, PS concentration, catalyst addition and stirring rate on the decolorization of Acid Orange 7 （AO7） was investigated. The results showed that the decolorization efficiency increased with an increase in PS concentration from 0.3 to 0.5 g/L and an increase in catalyst amount from 0.5 to 0.8 g/L. But further increase in PS concentration and catalyst addition would result in an unpronounced increase in decolorization efficiency. In the range of 300 to 900 r/min, stirring rate had little effect on AO7 decolorization. The catalyst stability was evaluated by measuring decolorization efficiency for four successive cycles.
文摘文章进行了UV/H2O2/GAC和GAC系统用于微污染水深度处理的试验研究,结果表明:UV/H2O2/GAC对UV254和TOC均有良好的去除效果,当H2O2投量3.0 mg/L,UV/H2O2反应器停留时间20 m in时,系统的COD和UV254去除率为44.6%和72.8%。UV/H2O2主要作用在于改善了GAC对有机物的吸附,产生了羟基自由基,从而提高了去除效果。
