Flocculation of Composite Flocculant PAC-PDMDAAC for Seawater Purification and Its Optimum Coagulation Condition

化学工业与工程

Chemcial Industry and Engineering

2018, Vol. 35

Issue (2) :35-41,69 DOI: 10.13353/j.issn.1004.9533.20161124

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Flocculation of Composite Flocculant PAC-PDMDAAC for Seawater Purification and Its Optimum Coagulation Condition

Zhao Jin, Wang Wenhua, Ma Yuhui, Jiang Tianxiang, Wang Jing, Zhang Yushan

Institute of Seawater Desalination and Multipurpose Utilization, Tianjin 300192, China

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Abstract

The composite flocculants were prepared using PAC (Polymeric aluminum chloride)and PDMDAAC (Poly dimethyl diallyl ammonium chloride) as raw materials, and was used in purification treatment of seawater. The coagulation process during the treatment of coastal seawater was evaluated by investigating flocculation index(FI), floc thickness and stability kinetics under different PDMDAAC/Al mass ratios. The Box-Behnken response surface methodology was used to study the combined effects of flocculant dosage and pH on turbidity and COD_Mn removal efficiency. The experimental results demonstrated that the composite flocculant had better flocculant efficiency than PAC. The increase in the PDMDAAC/Al mass ratio resulted in a larger flocculation index, flocs thickness and stability kinetics parameter, and the floc sedimentation rate was also increased. The optimal coagulation conditions for the treatment of seawater using PAC-PDMDAAC were as follows:pH 7.5, flocculant dosage 15.3 mg/L. Moreover, the maximum removal rate of COD_Mn and turbidity under optimal conditions reached up to 65.2% and 87.4% respectively, which were consistent with the predicted value by response surface methodology.

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	Zhao Jin
	Wang Wenhua
	Ma Yuhui
	Jiang Tianxiang
	Wang Jing
	Zhang Yushan

Keywords： composite coagulation PAC-PDMDAAC； seawater； coagulation； flocculation characteristics； response surface methodology

Received 2016-11-29;

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Zhao Jin, Wang Wenhua, Ma Yuhui, Jiang Tianxiang, Wang Jing, Zhang Yushan.Flocculation of Composite Flocculant PAC-PDMDAAC for Seawater Purification and Its Optimum Coagulation Condition[J] Chemcial Industry and Engineering, 2018,V35(2): 35-41,69

[1] 寇希元, 张雨山, 王静, 等. 羧甲基壳聚糖复合絮凝剂净化海水的试验研究[J]. 海洋环境科学, 2011, 30(4):496-503 Kou Xiyuan, Zhang Yushan, Wang Jing, et al. Experimental study on purification of seawater by carboxy methyl chitosan compound flocculant[J]. Marine Environmental Science, 2011, 30(4):496-503(in Chinese)
[2] 高宝玉. 水和废水处理用复合高分子絮凝剂的研究进展[J]. 环境化学, 2011, 30(1):337-345 Gao Baoyu. Progress in the research of composite polymeric flocculants for water and wastewater treatment[J]. Environmental Chemistry, 2011, 30(1):337-345(in Chinese)
[3] 任宏洋, 何敏, 王兵, 等. 复合混凝剂(PFC-PDMDAAC)混凝性能与应用研究[J]. 环境工程学报, 2016, 10(4):1761-1768 Ren Hongyang, He Min, Wang Bing, et al. Coagulating mechanisms and practical applications of a composite coagulant (PFC-PDMDAAC)[J]. Chinese Journal of Environmental Engineering, 2016, 10(4):1761-1768(in Chinese)
[4] Yang J, Yan L, Li S, et al. Treatment of aging oily wastewater by demulsification/flocculation[J]. Journal of Environmental Science and Health, 2016, 51(10):798-804
[5] 魏锦程, 高宝玉, 王燕, 等. 聚合铁与季铵盐复合絮凝剂处理造纸中段水的性能[J]. 精细化工, 2007, 24(3):278-281 Wei Jincheng, Gao Baoyu, Wang Yan, et al. The performance of polyferric/quaternary ammonium salt composite flocculants in treatment of intermediate water of paper making[J]. Fine Chemicals, 2007, 24(3):278-281(in Chinese)
[6] 张海彦, 郑怀礼, 龙腾锐. PAC-PDMDAAC无机/有机复合絮凝剂除磷研究[J]. 水处理技术, 2005, 31(3):69-71 Zhang Haiyan, Zheng Huaili, Long Tengrui. Phosphorus removal of PAC-PDMDAAC inorganic/organic composite flocculant[J]. Technology of water treatment, 2005, 31(3):69-71(in Chinese)
[7] 王燕, 高宝玉, 岳钦艳, 等. 铁盐类无机有机复合絮凝剂的水解特性及脱色效能[J]. 环境化学, 2006, 25(6):730-734 Wang Yan, Gao Baoyu, Yue Qinyan, et al. Hydrolysate of composite flocculant prepared from Fe(Ⅲ) inorganic flocculants and organic flocculants.Environmental Chemistry, 2006, 25(6):730-734(in Chinese)
[8] 李荣庭, 郑雅杰, 彭振华, 等. PDMDAAC及其复合絮凝剂对模拟印染废水的处理[J]. 中南大学学报:自然科学版, 2008, 39(4):658-664 Li Rongting, Zheng Yajie, Peng Zhenhua, et al. Simulated dyeing wastewater treated by PDMDAAC and it composite flocculants[J]. Journal of Central South University:Science and Technology, 2008, 39(4):658-664(in Chinese)
[9] 高宝玉, 王燕, 岳钦艳, 等. PAC与PDMDAAC复合絮凝剂中铝的形态分布[J]. 中国环境科学, 2002, 22(5):472-476 Gao Baoyu, Wang Yan, Yue Qinyan, et al. The distribution aluminum form in composite flocculant of polyaluminum chloride-polydimethyl diallyammonium chloride[J]. China Environmental Science, 2002, 22(5):472-476(in Chinese)
[10] 王亚军, 王进喜. 响应面法优化腐殖酸去除水中重金属铬的吸附条件及热力学研究[J]. 环境化学, 2013, 32(12):2282-2289 Wang Yajun, Wang Jinxi. Response surface methodology to optimize adsorption condition and thermodynamic studies of Cr(VI) from aqueous solutions onto humic acid[J]. Environmental Chemistry, 2013, 32(12):2282-2289(in Chinese)
[11] 高永坤, 童延斌, 鲁建江. 响应面分析法优化造纸污泥吸附剂除磷工艺[J]. 环境工程学报, 2012, 6(5):1727-1733 Gao Yongkun, Tong Yanbin, Lu Jianjiang. Optimization of paper mill sludge adsorbent in treatment of phosphorus containing wastewater using response surface method[J]. Chinese Journal of Environmental Engineering, 2012, 6(5):1727-1733(in Chinese)
[12] Turkyilmaz H, Kartal T, Yildiz S Y. Optimization of lead adsorption of mordenite by response surface methodology:Characterization and modification[J]. Iran J Environ Healt, 2014, 12(5):2-9
[13] 金鹏康, 王晓昌. 腐殖酸混凝过程FI曲线的特征参数分[J]析. 环境科学学报, 2002, 22(4):423-427 Jin Pengkang, Wang Xiaochang. An analysis of characteristic parameters of FI curve for coagulation of humic acid[J]. Acta Scientiae Circumstantiae, 2002, 22(4):423-427(in Chinese)
[14] 金鹏康, 冯永宁, 王宝宝, 等. 基于光学在线监测及形态学研究的絮凝体强度分析方法[J].环境科学, 2013, 34(5):1802-1807 Jin Pengkang, Feng Yongning, Wang Baobao, et al. Evaluation of floc strength based on morphological analysis and optical online monitoring[J]. Environmental Science, 2013, 34(5):1802-1807(in Chinese)
[15] 赵瑾, 王树勋, 王静, 等. 基于絮体生长特性和体系稳定性的海水混凝过程[J].环境工程学报, 2015, 9(6):2840-2846 Zhao Jin, Wang Shuxun, Wang Jing, et al. Seawater coagulation process based on floc properties and stability kinetics[J]. Chinese Journal of Environmental Engineering, 2015, 9(6):2840-2846(in Chinese)
[16] 赵瑾, 王文华, 姜天翔, 等. PDMDAAC在海水混凝过程中的助凝作用[J]. 工业水处理, 2016, 36(4):77-79 Zhao Jin, Wang Wenhua, Jiang Tianxiang, et al. Coagulation aid function of PDMDAAC in the process of seawater coagulation[J]. Industrial Water Treatment, 2016, 36(4):77-79(in Chinese)
[17] 刘立华, 龚竹青. 聚二甲基二烯丙基氯化铵与聚合硫酸铁复合絮凝剂的制备及絮凝性能研究[J]. 湖南科技大学学报:自然科学版, 2005, 20(4):90-94 Liu Lihua, Gong Zhuqing. Study on preparation and coagulation properties of poly(dimethyldiallylammonium chloride)-polyferric sulfate composite flocculant[J]. Journal of Hunan University of Science & Technology:Natural Science Edition, 2005, 20(4):90-94
[18] Jung K W, Kim D H, Kim H W, et al. Optimization of combined(acid + thermal) pretreatment for fermentative hydrogen production from Laminaria japonica using response surface methodology(RSM)[J]. International Journal of Hydrogen Energy, 2011, 36(16):9626-9631