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首页> 外文期刊>Separation and Purification Technology >Floc characteristics of titanium tetrachloride (TiCl4) compared with aluminum and iron salts in humic acid-kaolin synthetic water treatment
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Floc characteristics of titanium tetrachloride (TiCl4) compared with aluminum and iron salts in humic acid-kaolin synthetic water treatment

机译：腐殖酸-高岭土合成水处理中四氯化钛（TiCl4）与铝和铁盐的絮凝特性

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摘要

The floc strength and regrowth properties of TiCl4, FeCl3, and A12(SO4)3 were comparatively evaluated using humic acid-kaolin synthetic water sample. At the given optimum dosage (20 mg/L as Ti, 8 mg/L as Fe, and 2 mg/L as Al, respectively), the floc growth, breakage and regrowth of TiCl4, FeCl3, and A12(SO4)3 were investigated by use of a laser diffraction particle sizing device. Jar tests were conducted to investigate the impact of shear force and breakage period on floc breakage and re-aggregation potential. Results indicated that the responses of flocs to increasing shear force and breakage period depend on the coagulant used. The ability of floc to resist breakage decreased with the increase of shear force. Floe strength properties were also measured in response to increasing shear force, with the results suggesting that the order of floc strength was TiCl4 > FeCl3 > A12(SO4)3. Floe regrowth of these three coagulants after exposure to high shear was limited, and flocs formed by TiCl4 displayed the weakest recoverability. Similar results were obtained when breakage period was different.
机译：使用腐殖酸-高岭土合成水样品对TiCl4，FeCl3和A12（SO4）3的絮凝强度和再生特性进行了比较评估。在给定的最佳剂量下（分别以Ti为20 mg / L，以Fe为8 mg / L和以Al为2 mg / L），TiCl4，FeCl3和A12（SO4）3的絮体生长，破损和再生长为通过使用激光衍射粒度仪进行研究。进行Jar试验以研究剪切力和断裂时间对絮凝物断裂和再聚集潜力的影响。结果表明絮凝物对增加的剪切力和断裂时间的响应取决于所使用的凝结剂。絮凝物抗断裂的能力随剪切力的增加而降低。还测量了随剪切力增加而产生的絮凝强度特性，结果表明，絮凝强度的顺序为TiCl4> FeCl3> A12（SO4）3。这三种凝结剂在高剪切作用下的絮凝物再生受到限制，由TiCl4形成的絮凝物显示出最弱的可回收性。当断裂时间不同时，得到类似的结果。

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