CuO nanoparticle-humic acid (CuONP-HA) composite contaminant removal by coagulation/ultrafiltration process: The application of sodium alginate as coagulant aid
CuO nanoparticle-humic acid (CuONP-HA) composite contaminant removal by coagulation/ultrafiltration process: The application of sodium alginate as coagulant aid
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混凝/超滤工艺去除纳米氧化铜—腐植酸（CuONP—HA）复合污染物：海藻酸钠作为助凝剂的应用
DOI：
10.1016/j.desal.2015.04.018
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发表时间：
2015-07-01
期刊：
影响因子：
9.9
通讯作者：
Han, Qi
中科院分区：
文献类型：
--
作者：
Wang, Yan;Xue, Nan;Han, Qi
为了去除纳米CuO颗粒-腐植酸复合污染物(CuONP-HA)并减少混凝/超滤过程中的膜污染，采用海藻酸钠(SA)作为聚合氯化铝(PAC)的助凝剂对合成水中的CuONP-HA进行预处理。通过激光衍射仪和超滤污染模型研究了SA对絮体特性和膜污染的影响。结果表明，SA作为助凝剂，可以提高混凝/超滤过程中CuONP-HA的去除效率。 CuONP被完全去除，在PAC用量= 3.0 mg/L和SA用量>= 0.2 mg/L时，HA的去除效率超过80%，此外，PAC与SA（PAC + SA）相比单独的PAC可以形成更大的絮体，回收性更好。 PAC+SA形成的CuONP-HA絮体的平均尺寸超过1000μm，比PAC形成的絮体大约66％，并且小的CuONP-HA聚集体也增加至约280μm。此外，SA预处理可有效减少膜污染，且膜污染指数（MFI）随着SA用量的增加而降低。 (C) 2015 Elsevier B.V. 保留所有权利。
In order to remove CuO nanoparticle-humic acid composite contaminant (CuONP-HA) and reduce the membrane fouling in coagulation/ultrafiltraion process, sodium alginate (SA) was used as a coagulant aid of polyaluminum chloride (PAC) to pre-treat CuONP-HA in synthetic water. The effect of SA on floc properties and membrane fouling was investigated by a laser diffraction instrument and ultrafiltration fouling model. The results showed that SA, as coagulant aid, could improve the removal efficiency of CuONP-HA by coagulation/ultrafiltration process. CuONP was completely removed, and the removal efficiency of HA was over 80% at PAC dosage = 3.0 mg/L and SA dosage >= 0.2 mg/L Besides, PAC with SA (PAC + SA) could form larger flocs with better recoverability than PAC alone. The average size of CuONP-HA flocs formed by PAC + SA exceeded 1000 um which was about 66% larger than flocs formed by PAC, and the small CuONP-HA aggregation also increased to about 280 um. Moreover, membrane fouling was effectively reduced by pre-treating of SA, and membrane fouling index (MFI) was decreased with the dosage of SA increasing. (C) 2015 Elsevier B.V. All rights reserved.