Enterobacter GY-1 gained from a lab scale anaerobic-anoxic-aerobic (A2O) process treating textile effluent can effectively decolorize remazol dye. Under anaerobic condition, 91% of this remazol dye is decolorized, whi...Enterobacter GY-1 gained from a lab scale anaerobic-anoxic-aerobic (A2O) process treating textile effluent can effectively decolorize remazol dye. Under anaerobic condition, 91% of this remazol dye is decolorized, which is much higher than under aerobic condition. The optimum pH is 7 and the optimum temperature is 35 ℃ for the remazol dye decolorization by GY-1. Anthraquinone dyes and monoazo dyes are decolorized more efficiently by GY-1 than other dyes tested decolorized. GY-1 can not decolorize the remazol dye when it is the sole carbon source. Microbial cometabolism and decolorization of dye take place in the presence of some other carbon source called cometabolic substrate. The cometabolic substrate can be glucose, starch, peptone, beef extract, etc. The change of molecular structure of the dye before and after decolorized by GY-1 is studied by UV-Vis absorption spectrum. The results indicate that its molecular structure is changed evidently.展开更多
Water contamination by Remazol? dyes can be remediated with the use of bleaching metal complexes. In this study, a series of Mn(III) complexes and ferric nitrilotriacetate were found to be useful in the degrada-tion o...Water contamination by Remazol? dyes can be remediated with the use of bleaching metal complexes. In this study, a series of Mn(III) complexes and ferric nitrilotriacetate were found to be useful in the degrada-tion of Remazol Blue, Remazol Turquoise and Remazol Brilliant Blue. The effect of peroxide, pH, time and irradiation on the bleaching of the dyes was studied. Mn(III)-salen complexes were effective in the degrada-tion of the diazo Remazol Blue dye in the presence of a 2-fold excess of hydrogen peroxide. This dye was also effectively bleached by a combination of hydrogen peroxide, ferric nitrilotriacetate and light irradiation. This is the first time well-defined, low molecular weight trivalent metal complexes are applied to the degra-dation of Remazol? dyes.展开更多
The adsorption characteristics of Remazol Black B on anoxic sludge were investigated.The parameters,such as initial pH,sulphate concentration,and temperature,affecting the dye adsorption were studied.The adsorption da...The adsorption characteristics of Remazol Black B on anoxic sludge were investigated.The parameters,such as initial pH,sulphate concentration,and temperature,affecting the dye adsorption were studied.The adsorption data were analyzed with three adsorption isotherm models,namely Langmuir,Freudlich,and linear partition.The results showed that adsorption of Remazol Black B on the sterilized sludge reached equilibrium in 4 h.It also indicated that pH had significant effect on anoxic sludge adsorption behavior.The adsorption capacity of anoxic sludge decreased with the increase of pH value and the maximum adsorption capacity of dyes occurred at pH=3.The adsorptive capacities increased with the decrease of temperature and increase of sulphate concentration.Results also indicated that the adsorption equilibrium of Remazol Black B on anoxic sludge could be well fitted by Freundlich model.展开更多
纺织厂和制革厂的废水中除含有许多阴离子、染料外,还包含大量的Cr^6+,而废水温度是影响生物吸附剂对其进行有效吸附的重要参数。本文采用干燥的Phormidium sp.菌对Cr^6+和活性染料Remazol Black B的生物吸附进行了研究。Phormidiu...纺织厂和制革厂的废水中除含有许多阴离子、染料外,还包含大量的Cr^6+,而废水温度是影响生物吸附剂对其进行有效吸附的重要参数。本文采用干燥的Phormidium sp.菌对Cr^6+和活性染料Remazol Black B的生物吸附进行了研究。Phormidium sp属嗜热性cyanobacterium菌。pH=2.0时,在无染料和染料浓度为100mg/L的铬溶液中,吸附量是Cr^6+初始浓度和温度的函数。在此条件下,该生物质对Cr^6+和染料具有最大吸附量。对Cr^6+和染料的吸附量均随温度的降低而降低,表明吸附从本质上是一种放热反应。将浓度为100ml/L的染料加入到Cr^6+溶液中,将大大增加Cr^6+的平衡吸附量。同样,铬的存在也增加了染料的吸附量。25℃时,100mg/L Cr^6+溶液和100mg/L含染料的溶液中分别有22.8mg/g铬离子和91.3mg/g染料被生物体所吸附。Langmuir吸附模型最适于用来描述纯铬溶液和含染料的铬混合液中Cr^6+的生物吸附。假二级动力学模型可精确描述Cr^6+和染料的吸附动力学。展开更多
活性染料用于棉织物染色时,其固色率较低,一般仅为60%-70%左右,因此染料的利用率较低,浪费较严重,染色废液中含有大量未利用的染料,对环境造成污染。本设计选用Remazol X Blue RCB活性染料对棉织物染色,并使用壳聚糖进行促染...活性染料用于棉织物染色时,其固色率较低,一般仅为60%-70%左右,因此染料的利用率较低,浪费较严重,染色废液中含有大量未利用的染料,对环境造成污染。本设计选用Remazol X Blue RCB活性染料对棉织物染色,并使用壳聚糖进行促染,结果表明,壳聚糖在一定浓度使棉织物的染色性能大大提高。展开更多
基金Fundamental Research Funds for the Central Universities of China(No.2011D11309)Shanghai Leading Academic Discipline,China(No.B604)
文摘Enterobacter GY-1 gained from a lab scale anaerobic-anoxic-aerobic (A2O) process treating textile effluent can effectively decolorize remazol dye. Under anaerobic condition, 91% of this remazol dye is decolorized, which is much higher than under aerobic condition. The optimum pH is 7 and the optimum temperature is 35 ℃ for the remazol dye decolorization by GY-1. Anthraquinone dyes and monoazo dyes are decolorized more efficiently by GY-1 than other dyes tested decolorized. GY-1 can not decolorize the remazol dye when it is the sole carbon source. Microbial cometabolism and decolorization of dye take place in the presence of some other carbon source called cometabolic substrate. The cometabolic substrate can be glucose, starch, peptone, beef extract, etc. The change of molecular structure of the dye before and after decolorized by GY-1 is studied by UV-Vis absorption spectrum. The results indicate that its molecular structure is changed evidently.
文摘Water contamination by Remazol? dyes can be remediated with the use of bleaching metal complexes. In this study, a series of Mn(III) complexes and ferric nitrilotriacetate were found to be useful in the degrada-tion of Remazol Blue, Remazol Turquoise and Remazol Brilliant Blue. The effect of peroxide, pH, time and irradiation on the bleaching of the dyes was studied. Mn(III)-salen complexes were effective in the degrada-tion of the diazo Remazol Blue dye in the presence of a 2-fold excess of hydrogen peroxide. This dye was also effectively bleached by a combination of hydrogen peroxide, ferric nitrilotriacetate and light irradiation. This is the first time well-defined, low molecular weight trivalent metal complexes are applied to the degra-dation of Remazol? dyes.
基金Shanghai Leading Academic Discipline Project of China(No.B604)DERC Project of China(No.R00506)+1 种基金Projectof Key Laboratory of Science & Technology of Eco-Textile,China(No.EcoKF200708)Young Teacher Foundation of Donghua University,China(No.113100044018)
文摘The adsorption characteristics of Remazol Black B on anoxic sludge were investigated.The parameters,such as initial pH,sulphate concentration,and temperature,affecting the dye adsorption were studied.The adsorption data were analyzed with three adsorption isotherm models,namely Langmuir,Freudlich,and linear partition.The results showed that adsorption of Remazol Black B on the sterilized sludge reached equilibrium in 4 h.It also indicated that pH had significant effect on anoxic sludge adsorption behavior.The adsorption capacity of anoxic sludge decreased with the increase of pH value and the maximum adsorption capacity of dyes occurred at pH=3.The adsorptive capacities increased with the decrease of temperature and increase of sulphate concentration.Results also indicated that the adsorption equilibrium of Remazol Black B on anoxic sludge could be well fitted by Freundlich model.