Electrochemical treatment of textile dyes and dyehouse effluents
Electrochemical treatment of textile dyes and dyehouse effluents
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DOI：
10.1016/j.jhazmat.2006.03.032
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发表时间：
2006-09-21
影响因子：
13.6
通讯作者：
Mantzavinos, Dionissios
中科院分区：
文献类型：
--
作者：
Chatzisymeon, Efthalia;Xekoukoulotakis, Nikolaos P.;Mantzavinos, Dionissios
研究了纺织废水在钛-钽-铂-铱阳极上的电化学氧化。在具有内部再循环的流通式电解池中，在5、10、14和20 A的电流强度、0.5、1、2和4%的NaCl浓度和0.81和0.65 Us的再循环速率下，使用高度着色的，合成废水含有16种纺织染料，总浓度为361 mg/L，化学需氧量（COD）为281 mg/L。此外，一个实际的印染废水含有残余染料以及各种无机和有机化合物与COD为404 mg/L进行了测试。在大多数情况下，定量废水脱色后实现10-15分钟的处理，这需要低能耗;相反，矿化的程度在30和90%之间变化180分钟后，这取决于操作条件和废水的类型。在一般情况下，处理性能提高，增加电流强度和盐度和降低溶液pH值。然而，使用不含氯化物的电解质（如硫酸亚铁或硫酸钠）抑制降解。虽然实际废水对海洋细菌费氏弧菌的急性毒性很弱，但在处理后急剧增加，从而表明形成了持久性有毒副产物。(c)2006 Elsevier B. V.保留所有权利。
The electrochemical oxidation of textile effluents over a titanium-tantalum-platinum-iridium anode was investigated. Batch experiments were conducted in a flow-through electrolytic cell with internal recirculation at current intensities of 5, 10, 14 and 20 A, NaCl concentrations of 0.5, 1, 2 and 4% and recirculation rates of 0.81 and 0.65 Us using a highly colored, synthetic effluent containing 16 textile dyes at a total concentration of 361 mg/L and chemical oxygen demand (COD) of 281 mg/L. Moreover, an actual dyehouse effluent containing residual dyes as well as various inorganic and organic compounds with a COD of 404 mg/L was tested. In most cases, quantitative effluent decolorization was achieved after 10-15 min of treatment and this required low energy consumption; conversely, the extent of mineralization varied between 30 and 90% after 180 min depending on the operating conditions and the type of effluent. In general, treatment performance improved with increasing current intensity and salinity and decreasing solution pH. However, the use of electrolytes not containing chloride (e.g. FeSO4 or Na2SO4) suppressed degradation. Although the acute toxicity of the actual effluent to marine bacteria Vibrio fischeri was weak, it increased sharply following treatment, thus suggesting the formation of persistent toxic by-products. (c) 2006 Elsevier B.V. All rights reserved.