Coagulation by titanium tetrachloride for fulvic acid removal: Factors influencing coagulation efficiency and floc characteristics
Coagulation by titanium tetrachloride for fulvic acid removal: Factors influencing coagulation efficiency and floc characteristics
复制标题
四氯化钛混凝去除黄腐酸：影响混凝效率和絮体特性的因素
DOI：
10.1016/j.desal.2013.12.016
复制
发表时间：
2014-02
期刊：
影响因子：
9.9
通讯作者：
Shon, H. K.
中科院分区：
文献类型：
--
作者：
Gao, B. Y.;Zhang, G. Z.;Phuntsho, S.;Shon, H. K.
研究了四氯化钛（TiCl 4）与传统混凝剂--氯化铁（FeCl 3）和硫酸铝（Al 2（SO 4）3）相比去除富里酸（FA）（作为模型有机物）的混凝效率。并对不同混凝条件下3种混凝剂形成的絮体的生长、破碎和再生长特性进行了对比评价。结果表明，TiCl 4对UV 278（278 nm处的吸光度）和DOC（溶解性有机碳）的去除效果优于FeCl 3和Al 2（SO 4）3，且TiCl 4产生的絮体最大，絮体生长速率最快。絮凝体对不同操作参数的响应取决于所用的混凝剂，而絮凝体的破碎和重新聚集也显着影响剪切力和破碎时间。絮体强度随剪切力的增加而衰减，而絮体可恢复性则相反。无论使用何种混凝剂，破碎期的延长都会导致絮体强度和可恢复性的恶化。与常规混凝剂相比，TiCl 4形成的絮体破碎后的可恢复性最弱。由于TiCl 4作为一种新型混凝剂的研究还比较晚，因此，对其混凝性能和絮体特性与传统混凝剂进行对比研究，为TiCl 4的广泛应用提供了有价值的信息。
Coagulation efficiency of titanium tetrachloride (TiCl4) was investigated for fulvic acid (FA) (as model organic matter) removal compared to traditional coagulants — iron chloride (FeCl3) and aluminum sulfate (Al2(SO4)3). The growth, breakage and regrowth nature of flocs formed by the three coagulants were also comparatively evaluated under different coagulation conditions. Results indicated that TiCl4achieved higher removal of UV278(absorbance at 278 nm) and DOC (dissolved organic carbon) than FeCl3and Al2(SO4)3, and TiCl4produced the largest flocs with the highest floc growth rate. The responses of floc to different operating parameters depend on the coagulant used, while the floc breakage and re-aggregation were also significantly influenced by shear force and break-up period. Floc strength decayed with the increasing shear force, while the inverse trend was observed for floc recoverability. An extension in break-up period resulted in the deterioration of both floc strength and recoverability regardless of the coagulants used. Flocs formed by TiCl4displayed the weakest recoverability after breakage by contrast to conventional coagulants. Since TiCl4is only studied recently as a novel coagulant, the comparative study of coagulation performance and floc characteristics of TiCl4against the traditional coagulants provided valuable information for its wide application in the future.
登录
查看更多内容
影响因子：
12.8
作者：
Yifan Wu;Wen Liu;N. Gao;T. Tao
通讯作者：
Yifan Wu;Wen Liu;N. Gao;T. Tao
影响因子：
2.7
作者：
M. Boller;S. Blaser
通讯作者：
M. Boller;S. Blaser
影响因子：
12.8
作者：
Guan-zhong Lu;J. Qu;Hong-xiao Tang
通讯作者：
Guan-zhong Lu;J. Qu;Hong-xiao Tang
影响因子：
11.4
作者：
Yanxia Zhao;B. Gao;H. K. Shon;Yang Wang;J. Kim;Q. Yue;X. Bo
通讯作者：
Yanxia Zhao;B. Gao;H. K. Shon;Yang Wang;J. Kim;Q. Yue;X. Bo
影响因子：
--
作者：
Tao Li;Zhe Zhu;Dongsheng Wang;C. Yao;Hong-xiao Tang
通讯作者：
Tao Li;Zhe Zhu;Dongsheng Wang;C. Yao;Hong-xiao Tang