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Impact of preformed composite coagulants on alleviating colloids and organics-based ultrafiltration membrane fouling: Role of polymer composition and permeate quality
Gao, Qian; Demissie, Hailu; Lu, Sen; Xu, Zhizhen; Ritigala, Tharindu; Yingying, Sun; Yang, Wei; Wang, Dongsheng; Xu, Hui
2021-08
Source PublicationJOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume9Issue:4Pages:-
AbstractIn situ formed inorganic-organic polymer composite coagulant (IPCC) is being increasingly applied in modern drinking water purification, although the impact of cationic polymers on the ultrafiltration (UF) process is controversial. This study evaluates the impact of preformed IPCC in coagulation-ultrafiltration treatment of humic acid (HA) and bovine serum albumin (BSA) rich water by using a cationic poly(diallyldimethylammonium) chloride (pDADMAC) of various molecular weight (MW) range. The effect of feed water components, and composition (2%, 5%, 10%) of polymers (large, L-pDADMAC and small, S-pDADMAC) on UF permeate water quality and membrane fouling were systematically investigated. Results show that IPCC effectively mitigated membrane fouling and improved permeate quality depending on polymer composition. Consistent with AFM and SEM fouling analysis, the membrane contact angle (fouling) under all pretreated BSA feed filtration was higher (82.0 degrees-90.3 degrees) than HA. It was very low (49.1 degrees) particularly under 10% L-pDADMAC pretreated HA media than that of 10% S-pDADMAC (51.9 degrees), but interestingly, the permeate flux in S-pDADMAC was high owing to its cake layer permeability. Consequently, BSA demonstrated more permeate flux decline (0.32-0.54) than HA (0.53-0.9), but highest DOC removal (similar to 90%) was achieved, attributed to the propensity of the cake layer for BSA, thereafter aggravating fouling.
Department中国科学院饮用水科学与技术重点实验室
KeywordPreformed composite-coagulant Coagulation-ultrafiltration Permeate flux Membrane fouling Cake layer
WOS Research AreaEngineering, Environmental ; Engineering, Chemical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/46224
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Shaanxi Prov Land Engn Construct Grp Co Ltd, Inst Land Engn & Technol, Xian 710055, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Drinking Water Sci & Technol, 18 Shuangqing Rd, Beijing 100085, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, 18 Shuangqing Rd, Beijing 100085, Peoples R China
4.Beijing Municipal Inst Labour Protect, Beijing 100054, Peoples R China
5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China
6.Univ Chinese Acad Sci UCAS, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Gao, Qian,Demissie, Hailu,Lu, Sen,et al. Impact of preformed composite coagulants on alleviating colloids and organics-based ultrafiltration membrane fouling: Role of polymer composition and permeate quality[J]. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,2021,9(4):-.
APA Gao, Qian.,Demissie, Hailu.,Lu, Sen.,Xu, Zhizhen.,Ritigala, Tharindu.,...&Xu, Hui.(2021).Impact of preformed composite coagulants on alleviating colloids and organics-based ultrafiltration membrane fouling: Role of polymer composition and permeate quality.JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING,9(4),-.
MLA Gao, Qian,et al."Impact of preformed composite coagulants on alleviating colloids and organics-based ultrafiltration membrane fouling: Role of polymer composition and permeate quality".JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9.4(2021):-.
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