聚铁-聚丙双元混凝剂絮体的强度与再生性能研究。
Strength and regrowth properties of polyferric-polymer dual-coagulant flocs in surface water treatment.
机构信息
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, 250100 Jinan, China.
出版信息
J Hazard Mater. 2010 Mar 15;175(1-3):949-54. doi: 10.1016/j.jhazmat.2009.10.101. Epub 2009 Oct 30.
The floc strength and regrowth properties of three polyferric-cationic polymer dual-coagulants were comparatively evaluated using surface water sample. The first dual-coagulant PFC-PD was prepared by premixing of polyferric chloride (PFC) and polydiallyldimethylammonium (PDADMAC) before dosing. The other two, PFCF (PFC dosed firstly) and PDF (PDADMAC dosed firstly), were achieved by dosing PFC and PDADMAC in different order. Floc strength properties were measured in response to increasing shear levels in the long period and high shear level in the short or long period. For the given optimum dose (3.0 mg L(-1)) and water pH (6.5) condition, the order of floc strength was PFCF>PDF>PFC-PD. The dual-coagulant which gave stronger flocs also gave a lower absolute value of zeta potential. The floc regrowth properties of all three dual-coagulants after short and long period high shear level were also investigated. The floc recoverability was in the following order: PFCF>PFC-PD>PDF.
使用地表水样本比较了三种聚铁阳离子聚合物双混凝剂的絮体强度和再生特性。第一种双混凝剂 PFC-PD 通过聚氯化铁 (PFC) 和聚二烯丙基二甲基氯化铵 (PDADMAC) 预混合后投加制备。另外两种，PFCF（先投加 PFC）和 PDF（先投加 PDADMAC），则通过不同的投加顺序来实现。通过在长周期和短周期高剪切水平下增加剪切水平来测量絮体强度特性。在给定的最佳剂量（3.0mg/L）和水 pH 值（6.5）条件下，絮体强度的顺序为 PFCF>PDF>PFC-PD。产生更强絮体的双混凝剂也给出了更低的 ζ 电位绝对值。还研究了三种双混凝剂在短周期和长周期高剪切水平后的絮体再生特性。絮体的恢复能力如下：PFCF>PFC-PD>PDF。
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