Effect of Si/Ti molar ratio on enhanced coagulation performance, floc properties and sludge reuse of a novel hybrid coagulant:polysilicate titanium sulfate
Effect of Si/Ti molar ratio on enhanced coagulation performance, floc properties and sludge reuse of a novel hybrid coagulant:polysilicate titanium sulfate
复制标题
Si/Ti摩尔比对新型复合混凝剂聚硅酸钛硫酸盐混凝性能、絮凝性能和污泥回用的影响
DOI：
10.1016/j.desal.2014.08.021
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发表时间：
2014-11
期刊：
影响因子：
9.9
通讯作者：
Li, Qian
中科院分区：
文献类型：
--
作者：
Gao, Baoyu;Yue, Qinyan;Wang, Yan;Li, Qian
聚硅酸（PSiA）已被用于改善金属混凝剂（如铝盐和铁盐）的混凝性能，而聚硅酸与钛盐的复配研究还不多。以腐殖土-高岭土复合水处理为研究对象，研究了钛硅比对钛盐混凝性能和絮体性质的影响。通过将不同量的聚硅铝（PSiA）与硫酸钛（TS）溶液混合，合成了聚硅硫酸钛（PST）。实验结果表明，Ti/Si摩尔比为20的PST 20对天然有机物的去除率最高。在适当的Ti/Si摩尔比下，PST对出水的剩余浊度也有一定的改善作用。PSiA的加入增大了硫酸钛的絮体粒径。PST 20和PST 50能提高絮体强度，而PST 10和PST 5的絮体强度弱于TS。PSiA还能提高絮体的强度和恢复能力。而PST絮凝体结构松散，分形维数较低。收集PST混凝系统的污泥并在700 °C下煅烧以制备TiO 2。
Polysilicic acid (PSiA) has been used to improve the coagulation behavior of metal coagulants (such as aluminum salts and iron salts), while there is not much research on the combination of polysilicic acid and titanium salts. This study was aimed to evaluate the effect of Ti/Si molar ratios on the titanium salt coagulation performance and floc properties in humic–kaolin water treatment. Polysilicate titanium sulfate (PST) was synthesized by mixing different amounts of PSiA and titanium sulfate (TS) solution. According to experiment results, PST20 (Ti/Si molar ratio = 20) exhibited the best natural organic matter removal efficiency (%). The effluent residual turbidity was also improved by PST at proper Ti/Si molar ratio. Floc size of titanium sulfate was enlarged by the addition of PSiA. Additionally, floc strength was enhanced by PST20 and PST50, while PST10 and PST5 flocs were weaker than TS floc. Floc strength and recovery ability were also improved by PSiA. However, flocs produced by PST were much loosely constructed with lower fractal dimension. Sludge of PST coagulation system was collected and calcined at 700 °C to prepare TiO2.
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影响因子：
6.9
作者：
Jian Shi;Yan Zhang;Kai‐Min Zou;F. Xiao
通讯作者：
Jian Shi;Yan Zhang;Kai‐Min Zou;F. Xiao
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：
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
DOI：
10.2166/wst.2009.254
发表时间：
2009-06
期刊：
Water science and technology : a journal of the International Association on Water Pollution Research
影响因子：
--
作者：
Y. Okour;H. K. Shon;I. E. Saliby
通讯作者：
Y. Okour;H. K. Shon;I. E. Saliby