Electrochemical degradation of Reactive Blue 19 in chloride medium for the treatment of textile dyeing wastewater with identification of intermediate compounds
Electrochemical degradation of Reactive Blue 19 in chloride medium for the treatment of textile dyeing wastewater with identification of intermediate compounds
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DOI：
10.1016/j.dyepig.2005.07.015
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发表时间：
2007-01-01
影响因子：
4.5
通讯作者：
Kim, Jong Guk
中科院分区：
文献类型：
--
作者：
Rajkumar, D.;Song, Byung Joo;Kim, Jong Guk
在本研究中，对一种纺织染料活性蓝19(RB-19)进行了电化学降解实验。在实验室规模的台式反应器上，考察了不同操作参数对钛基尺寸稳定阳极(DSA)的影响。RB-19的氧化是在电解产生的氯/次氯酸盐的主体溶液中进行的。提高初始pH和反应温度会降低脱色效率。同时，随着氯化物浓度的增加和电流密度的增大，脱色率也有所提高。对于不同浓度的RB-19，在短时间内实现了完全脱色。当投加氯化钠浓度为1.5g/L时，400 mg/L RB-19的化学需氧量和总有机碳的去除效率分别为55.8%和15.6%。利用气相色谱-质谱仪(GC/MS)对降解过程中形成的中间化合物进行了鉴定。在本研究中，在电解过程中没有检测到氯化有机化合物。鉴定出的主要化合物为苯、2-羟基-4，4-萘喹(C.I.天然橙6)、I-氨基蒽醌(C.I.重氮固红AL)、苯甲醇、苯甲醛、苯甲酸、邻苯二甲酸酐、苯酞、邻苯二甲醛和1，3-吲哚。(C)2005爱思唯尔有限公司。保留所有权利。
In the present study, electrochemical degradation experiments were conducted to degrade a textile dye namely Reactive Blue 19 (RB-19). A laboratory scale bench-top reactor was used to investigate the effect of various operating parameters using titanium based dimensionally stable anode (DSA). The oxidation of RB-19 takes place in the bulk solution with electrolytically generated chlorine/hypochlorite. Increasing the initial pH and increasing the reaction temperature decreases the de-colorization efficiency. At the same time, increasing the chloride concentration and increasing the current density showed an increase in the color removal. The complete removal of color was achieved within a short period of electrolysis for different concentrations of RB-19. However, the removal of chemical oxygen demand (COD) and total organic carbon (TOC) was 55.8% and 15.6%, respectively, for 400 mg/L RB-19 with 1.5 g/L sodium chloride concentration. The intermediate compounds formed during the degradation were identified using a gas chromatography coupled with mass spectrometry (GC/MS). In the present study, no chlorinated organic compounds were detected during the course of electrolysis. The major compounds identified were benzene, 2-hydroxy, 4,4-napthaquinoine (C.I. Natural orange 6), I-aminoanthraquinone (C.I. Diazo fast red AL), benzyl alcohol, benzaldehyde, benzoic acid, phthalic anhydride, phthalide, phthaldehyde and 1,3-indanone. (c) 2005 Elsevier Ltd. All rights reserved.