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Effect of viscosity,basicity and organic content of composite flocculant on the decolorization performance and mechanism for reactive dyeing wastewater

查看全文 作　　者：Yuanfang Wang Baoyu Gao Qinyan Yue Yan [1]Wang 高影响力作者 机构地区：[1]Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2011年第23卷第10期,共8页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (No. 50578089,21077066);the Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period (No. 2006BAJ08B05-2);the Scientific Technology Research and Development Program of Shandong of China (No. 2009GG10006003; 2010GZX20605);the Natural Science Foundation of Shandong Province of China (No. ZR2010BM014) 摘　　要：A coagulation/flocculation process using the composite flocculant polyaluminum chloride-epichlorohydrin dimethylamine (PACEPI-DMA) was employed for the treatment of an anionic azo dye (Reactive Brilliant Red K-2BP dye).The effect of viscosity (η),basicity (B=[OH]/[Al]) and organic content (WP) on the flocculation performance as well as the mechanism of PAC-EPI-DMA flocculant were investigated.The η was the key factor affecting the dye removal efficiency of PAC-EPI-DMA.PAC-EPI-DMA with an intermediate η (2400 mPa·sec) gave higher decolorization efficiency by adsorption bridging and charge neutralization due to the co-effect of PAC and EPI-DMA polymers.The W P of the composite flocculant was a minor important factor for the flocculation.The adsorption bridging of PAC-EPI-DMA with η of 300 or 4300 mPa·sec played an important role with the increase of W P,whereas the charge neutralization of them was weaker with the increase of W P.There was interaction between W P and B on the removal of reactive dye.The composite flocculant with intermediate viscosity and organic content was effective for the treatment of reactive dyeing wastewater,which could achieve high reactive dye removal efficiency with low organic dosage. 关 键 词：复合絮凝剂 活性艳红 印染废水 有机物含量 粘度 脱色性能 机制 碱度
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