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  • 石健,万杨,黄鑫,石宝友,耿建刚,华平.聚合铁钛混凝剂对印染废水的处理[J].环境工程学报,2019,13(5):1021-1029.DOI:10.12030/j.cjee.201901137    [点击复制]
  • SHI Jian,WAN Yang,HUANG Xin,SHI Baoyou,GENG Jiangang,HUA Ping.Treating dyeing wastewater with a kind of polyferric titanium sulfate[J].,2019,13(5):1021-1029.DOI:10.12030/j.cjee.201901137   [点击复制]
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聚合铁钛混凝剂对印染废水的处理
石健1,万杨2,黄鑫3,石宝友3,4,耿建刚5,华平2
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(1.南通大学分析测试中心,南通 226019;2.南通大学纺织服装学院,南通 226019;3.中国科学院生态环境研究中心,中国科学院饮用水科学与技术重点实验室,北京 100085;4.中国科学院大学,北京 100049;5.山东中科天泽净水材料有限公司,淄博 256406)
摘要:
采用钛铁矿为主要原料,以硫酸溶出部分铁和钛,并调节Ti/Fe比、碱化度制备高效的新型含钛聚合硫酸铁混凝剂(T-PSF),将其用于分散兰和活性黄2种模拟印染废水的脱色处理并研究其混凝去除机理。实验结果表明,在Ti/Fe为1∶6和碱化度为2.0时,制备出的T-PSF混凝效果最好。T-PSF对分散兰的去除率为94.3%,比FeCl3的去除率提高53.8%;对活性黄的去除率为34.0%,比FeCl3提高12.7%。T-PSF处理分散兰和活性黄的最佳投加量均为0.3 mmol·L-1,最佳水样初始pH分别为6和8。絮体粒径及结构分析结果表明,T-PSF处理分散兰过程中形成的絮体粒径较FeCl3大,处理活性黄过程中所形成的絮体粒径较FeCl3小,但絮体结构均比FeCl3更密实。结合T-PSF的表征、Zeta电位及絮体特性分析表明,在分散染料去除过程中,T-PSF产生的多羟基钛铁聚合物的电中和及吸附架桥起主要作用;对于活性染料的去除,主要机制为T-PSF水解产生的带正电的多羟基钛铁聚合物的吸附络合作用。
关键词:  混凝剂  印染废水  絮体  混凝机理
DOI:10.12030/j.cjee.201901137
投稿时间:2019-01-22
基金项目:国家自然科学基金资助项目21177067国家自然科学基金资助项目(21177067)
Treating dyeing wastewater with a kind of polyferric titanium sulfate
SHI Jian1,WAN Yang2,HUANG Xin3,SHI Baoyou3,4,GENG Jiangang5,HUA Ping2
(1.Analysis & Testing Center, Nantong University, Nantong 226019, China;2.School of Textile, Nantong University, Nantong 226019, China;3.Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;4.University of Chinese Academy of Sciences, Beijing 100049, China;5.Shandong Zhongke Tianze Water Purification Material Co. Ltd., Zibo 256406, China)
Abstract:
In this study, a new polyferric-titanium sulfate coagulant (T-PSF) was prepared through dissolving a part of iron and titanium from ilmenite with sulfuric acid and adjusting Ti/Fe ratio and basicity. The T-PSF was used to treat two kinds of simulated dye wastewater (disperse blue and reactive yellow), and its coagulation mechanisms were also discussed. The results showed that T-PSF had a good coagulation performance with the Ti/Fe ratio of 1∶6 and basicity of 2.0. The removal efficiencies of disperse blue and reactive yellow by T-PSF coagulation were 94.3% and 34.0%, which were 53.8% and 12.7% higher than those by FeCl3 coagulation, respectively. For disperse blue and reactive yellow removal, the optimal T-PSF dosages were 0.3 mmol·L-1 and the optimum pHs were 6 and 8, respectively. In compared with flocs during FeCl3 coagulating dyes, larger and more compact ones occurred during T-PSF coagulating disperse blue, while smaller and more compact one occurred during T-PSF coagulating reactive yellow. In combination with T-PSF characterization, Zeta potential and other properties of flocs, charge neutralization and bridging of polyhydroxy-ferrotitanium polymers through T-PSF hydrolysis were identified as playing a key role in disperse dyes removal, while the adsorption and complexation of positively charged polyhydroxy-ferrotitanium polymers through T-PSF hydrolysis were identified as playing a key role in reactive dyes removal.
Key words:  coagulant  dyeing wastewater  floc  coagulation mechanism