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Coagulation performance and membrane fouling of polyferric chloride/epichlorohydrin--dimethylamine in coagulation/ultrafiltration combined process

Sun, Shenglei ; Yang, Zhonglian ; Huang, Xin ; Bu, Fan ; Ma, Defang ; Dong, Hongyu ; Gao, Baoyu ; Yue, Qinyan ; Wang, Yan ; Li, Qian

Desalination, Feb 2, 2015, Vol.357, p.163 [Tạp chí có phản biện]

ISSN: 0011-9164 ; DOI: 10.1016/j.desal.2014.11.031

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  • Nhan đề:
    Coagulation performance and membrane fouling of polyferric chloride/epichlorohydrin--dimethylamine in coagulation/ultrafiltration combined process
  • Tác giả: Sun, Shenglei ; Yang, Zhonglian ; Huang, Xin ; Bu, Fan ; Ma, Defang ; Dong, Hongyu ; Gao, Baoyu ; Yue, Qinyan ; Wang, Yan ; Li, Qian
  • Chủ đề: Clay ; Water Pollution ; Humic Acids ; Epoxy Resins ; Water Pollution Control ; Adsorption
  • Là 1 phần của: Desalination, Feb 2, 2015, Vol.357, p.163
  • Mô tả: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1016/j.desal.2014.11.031 Byline: Shenglei Sun, Zhonglian Yang, Xin Huang, Fan Bu, Defang Ma, Hongyu Dong, Baoyu Gao [baoyugao_sdu@aliyun.com] (*), Qinyan Yue [qyyue@sdu.edu.cn] (*), Yan Wang, Qian Li Keywords PFC/DAM--ECH; Coagulation; Floc properties; Membrane fouling Highlights * Coagulation performance of PFC/DAM--ECH was better than PFC at proper dosage. * Adding sequence of coagulants was critical for HA removal and floc properties. * Better removal efficiencies of HA by PFC/DAM--ECH achieved at acidic condition. * DAM--ECH improved the floc properties by enhancing charge neutralization mechanism. * Effects of DAM--ECH on floc properties reduced membrane fouling. Abstract Polyferric chloride (PFC) and epichlorohydrin--dimethylamine (DAM--ECH) with different PFC (as Fe.sup.3 +)/DAM--ECH mass ratios (MR) and dose methods were used in the treatment of humic acid--kaolin (HA--kaolin) simulated water under different pH conditions. Coagulation performance, floc characteristics and membrane fouling of PFC/DAM--ECH in coagulation--ultrafiltration (C--UF) process were investigated in this study. Results showed that the optimum coagulation performance was achieved when PFC dose was 15 mg/L with PFC/DAM--ECH MR of 2:1 under pH 6.0. Opposite adding sequence (DAM--ECH/PFC) would reduce UV.sub.254 (ultraviolet adsorption at 254 nm) and DOC (dissolved organic carbon) removal efficiency. Addition of DAM--ECH on the basis of PFC produced larger and stronger flocs with better regrowth ability. Proper dosage of DAM--ECH under certain coagulation condition could achieve the best coagulation performance and keep the UF membrane operating under a preferable status. Results of this study would be beneficial for application of composite coagulant PFC--DAM--ECH and DAM--ECH as coagulant aid in water treatment processes. Author Affiliation: Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Ji' nan 250100, China * Corresponding authors. Article History: Received 18 July 2014; Revised 26 November 2014; Accepted 28 November 2014
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0011-9164 ; DOI: 10.1016/j.desal.2014.11.031

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