Two azo dyes,C.I.Reactive Red 195(RR195)and C.I.Acid Black 234(AB234)were degraded by photocatalysis of Fe(Ⅲ)-oxalate complexes/H2O2 in aqueous non-ionic surfactant,Triton X-100(TX-100)solution.Some factors affecting...Two azo dyes,C.I.Reactive Red 195(RR195)and C.I.Acid Black 234(AB234)were degraded by photocatalysis of Fe(Ⅲ)-oxalate complexes/H2O2 in aqueous non-ionic surfactant,Triton X-100(TX-100)solution.Some factors affecting the dye degradation such as TX-100 concentration,irradiation intensity,and sodium chloride were investigated.The interaction and competition between dye and TX-100 during the degradation were also examined using spectrophotometry and maximum bubble pressure method,respectively.The results indicated that TX-100 showed a significant reduction effect on degradation of two azo dyes,but which was largely confined to TX-100 concentration below the Critical Micellar Concentration(CMC).And the reduction was considerably decreased above the CMC,especially in the case of AB234.Moreover,the reducing effect of TX-100 on dye degradation almost did not vary with irradiation intensity.And the impact of sodium chloride on dye degradation was limited by the addition of TX-100.展开更多
报道了中国希瓦氏菌D14 T 的Fe(Ⅲ)还原特性,研究了溶氧浓度、光照强度、温度、pH等条件对菌株Fe(Ⅲ)还原的影响。结果发现,随着培养基中Fe(Ⅲ)浓度的提高,菌株D14 T 的Fe(Ⅲ)还原速率相应降低;氧气和光照对Fe(Ⅲ)还原有一定的抑制作用...报道了中国希瓦氏菌D14 T 的Fe(Ⅲ)还原特性,研究了溶氧浓度、光照强度、温度、pH等条件对菌株Fe(Ⅲ)还原的影响。结果发现,随着培养基中Fe(Ⅲ)浓度的提高,菌株D14 T 的Fe(Ⅲ)还原速率相应降低;氧气和光照对Fe(Ⅲ)还原有一定的抑制作用;菌株还原Fe(Ⅲ)的最适反应温度为37℃;在反应起始pH6 0 - 10 0的条件下菌株可进行Fe(Ⅲ)还原。对不同形态Fe(Ⅲ)还原特性的研究结果表明,Fe(Ⅲ)的溶解度越高越有利于还原反应的进行。采用SDS和OGP这两种蛋白变性剂对Fe(Ⅲ)还原蛋白进行初步定位的结果表明,参与Fe(Ⅲ)还原的蛋白主要位于细胞可溶性外周蛋白。在同时含有偶氮染料和Fe(Ⅲ)的条件下,菌株D14 T 的偶氮染料脱色率和Fe(Ⅲ)展开更多
基金National Natural Science Foundation of China(No.20773093)Tianjin Municipal Science Programme Foundation,China(No.043605911)
文摘Two azo dyes,C.I.Reactive Red 195(RR195)and C.I.Acid Black 234(AB234)were degraded by photocatalysis of Fe(Ⅲ)-oxalate complexes/H2O2 in aqueous non-ionic surfactant,Triton X-100(TX-100)solution.Some factors affecting the dye degradation such as TX-100 concentration,irradiation intensity,and sodium chloride were investigated.The interaction and competition between dye and TX-100 during the degradation were also examined using spectrophotometry and maximum bubble pressure method,respectively.The results indicated that TX-100 showed a significant reduction effect on degradation of two azo dyes,but which was largely confined to TX-100 concentration below the Critical Micellar Concentration(CMC).And the reduction was considerably decreased above the CMC,especially in the case of AB234.Moreover,the reducing effect of TX-100 on dye degradation almost did not vary with irradiation intensity.And the impact of sodium chloride on dye degradation was limited by the addition of TX-100.
文摘报道了中国希瓦氏菌D14 T 的Fe(Ⅲ)还原特性,研究了溶氧浓度、光照强度、温度、pH等条件对菌株Fe(Ⅲ)还原的影响。结果发现,随着培养基中Fe(Ⅲ)浓度的提高,菌株D14 T 的Fe(Ⅲ)还原速率相应降低;氧气和光照对Fe(Ⅲ)还原有一定的抑制作用;菌株还原Fe(Ⅲ)的最适反应温度为37℃;在反应起始pH6 0 - 10 0的条件下菌株可进行Fe(Ⅲ)还原。对不同形态Fe(Ⅲ)还原特性的研究结果表明,Fe(Ⅲ)的溶解度越高越有利于还原反应的进行。采用SDS和OGP这两种蛋白变性剂对Fe(Ⅲ)还原蛋白进行初步定位的结果表明,参与Fe(Ⅲ)还原的蛋白主要位于细胞可溶性外周蛋白。在同时含有偶氮染料和Fe(Ⅲ)的条件下,菌株D14 T 的偶氮染料脱色率和Fe(Ⅲ)
