高级搜索

不同有机体系的混凝特征研究:以硫酸铝为例

,  ,  ,  ,  , 

downloadPDF

上一篇

下一篇

洪云, 张伟军, 左竟成, 刘园园, 董伟, 王东升. 不同有机体系的混凝特征研究:以硫酸铝为例[J]. 环境化学, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
引用本文: 洪云, 张伟军, 左竟成, 刘园园, 董伟, 王东升. 不同有机体系的混凝特征研究:以硫酸铝为例[J]. 环境化学, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
shu
HONG Yun, ZHANG Weijun, ZUO Jingcheng, LIU Yuanyuan, DONG Wei, WANG Dongsheng. Coagulation characteristics of different organic systems using aluminum sulfate as a coagulant[J]. Environmental Chemistry, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
Citation: HONG Yun, ZHANG Weijun, ZUO Jingcheng, LIU Yuanyuan, DONG Wei, WANG Dongsheng. Coagulation characteristics of different organic systems using aluminum sulfate as a coagulant[J]. Environmental Chemistry, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
shu

不同有机体系的混凝特征研究:以硫酸铝为例

  • 1.

    富士康科技集团, 廊坊, 065000;

  • 2.

    中国科学院生态环境研究中心环境水质学国家重点实验室, 北京, 100085;

  • 3.

    重庆市永川区环境监测站, 重庆, 404100;

  • 4.

    北京环球中科水务科技有限公司, 北京, 100085

  • 基金项目:

    国家杰出青年科学基金项目(51025830)资助.

Coagulation characteristics of different organic systems using aluminum sulfate as a coagulant

  • 1.

    Foxconn Technology Group, Langfang, 065000, China;

  • 2.

    State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China;

  • 3.

    Chongqing Yongchuan Environmental Monitoring Station, Chongqing, 404100, China;

  • 4.

    Beijing Global Water Technology Co ltd., Beijing, 100085, China

  • Fund Project:

  • 摘要: 选择牛血清蛋白和腐殖酸作为实验对象,考察了硫酸铝投加量和pH对两种有机体系有机物去除率、电荷性质以及絮体性质(粒径分布、分形维数和沉降性)的影响.实验结果发现,硫酸铝混凝对腐殖酸的去除效率要高于BSA,当硫酸铝投加量为5 mmol·L-1时,两种体系中DOC的去除率均达到最高.电中和在腐殖酸的混凝去除过程中占主导地位,而吸附架桥是BSA去除的主要机理.对于两种有机体系,随着硫酸铝投加量的升高,絮体粒径逐渐减小,而分形维数增大.相比腐殖酸体系,BSA混凝形成絮体粒径大但分形维数更小,同时絮体沉降性较差.此外,两种体系中DOC去除率在pH值等于6时均达到最高.同时,当pH值从5上升到9的过程中,BSA体系粒径逐渐增加;而在腐殖酸体系中,在pH值小于6时,絮体成长平衡时间延长,同时平衡后絮体粒径要明显大于pH值大于7条件下形成的絮体.
    Abstract: Organic composition is one of most important factors affecting coagulation process. In this study, bovine serum albumin (BSA) and humic acid were selected as model organic compounds,and the effects of aluminum sulfate dosage and pH on organic removal, charge property and floc properties (floc size, fractal dimension and settleability) in two organic systems were investigated. It was found that the aluminum sulfate coagulation exhibited better performance in removing humic acid in comparison to BSA. DOC removal reached the maximum for both systems when the dosage of aluminum sulfate was 5 mmol·L-1. Charge neutralization and adsorption-bridging were major mechanisms for humic acid and BSA removal respectively. For both organic systems, floc size increased while fractal dimension decreased with aluminum sulfate dosage. Compared to humic acid, the floc obtained in BSA coagulation was characterized by larger size, low fractal dimension and poor settleability. The pH 6 was the optimal value for DOC removal for both organic systems. In addition, floc from BSA coagulation became larger with increase in pH from 5 to 9. For humic system, the floc growth period at pH7.
  • 加载中
  • [1] Matilainen A, Vepsäläinen M, Sillanpää M. Natural organic matter removal by coagulation during drinking water treatment: A review[J]. Advances in Colloid and Interface Science, 2010, 159(2): 189-197
    [2] Jarvis P, Jefferson B, Parsons S A. How the natural organic matter to coagulant ratio impacts on floc structural properties[J].Environmental Science and Technology, 2005, 39(22): 8919-8924
    [3] Edzwald J K, Benschoten Van J E. Aluminum coagulation of natural organic matter// Chemical Water and Wastewater Treatment[M]. Springer, 1990: 341-359
    [4] Wilkinson K, Negre J C, Buffle J. Coagulation of colloidal material in surface waters: The role of natural organic matter[J].Journal of Contaminant Hydrology, 1997, 26(1/4): 229-243
    [5] Korshin G V, Benjamin M M, Sletten R S. Adsorption of natural organic matter (NOM) on iron oxide: Effects on NOM composition and formation of organo-halide compounds during chlorination[J].Water Research, 1997, 31(7): 1643-1650
    [6] 梁亮, 俞文正, 徐磊. 柠檬酸对不同混凝剂混凝效果的影响[J].环境科学学报, 2013, 33(9): 2428-2431
    [7] Henderson RK, Parsons S A, Jefferson B. The impact of differing cell and algogenic organic matter (AOM) characteristics on the coagulation and flotation of algae[J].Water research, 2010, 44(12): 3617-3624
    [8] 施国键, 乔俊莲, 王国强,等. 胞外分泌物和天然有机物对混凝的影响[J].环境科学, 2010, 31(3): 673-677
    [9] Glover S M, Yan Y D, Jameson G J, et al. Bridging flocculation studied by light scattering and settling[J].Chemical Engineering Journal, 2000, 80(1/3): 3-12
    [10] 朱哲, 李涛, 王东升,等. 阳离子型聚丙烯酰胺投加量对絮体性状特征的影响[J].环境化学, 2007, 26(2): 175-179
    [11] Wang D, Gregory J, Tang H. Mechanistic difference of coagulation of kaolin between PACl and cationic polyelectrolytes: A comparative study on zone 2 coagulation[J].Drying Technology, 2008, 26(8): 1060-1067
    [12] Li T, Zhu Z, Wang D, Yao C, et al. Characterization of floc size, strength and structure under various coagulation mechanisms[J].Powder Technology, 2006, 168(2): 104-110
    [13] Walker H W, Bob M M. Stability of particle flocs upon addition of natural organic matter under quiescent conditions[J].Water Research, 2001, 35(4): 875-882
    [14] Hu C, Liu H, Qu J, et al. Coagulation behavior of aluminum salts in eutrophic water: Significance of Al13 species and pH control[J].Environmental Science and Technology, 2006, 40(1): 325-331
    [15] Yan M, Wang D, Qu J, et al. Enhanced coagulation for high alkalinity and micro-polluted water: The third way through coagulant optimization[J].Water research, 2008, 42(8/9): 2278-2286
    [16] Zhao H, Liu H, Qu J. Effect of pH on the aluminum salts hydrolysis during coagulation process: Formation and decomposition of polymeric aluminum species[J].Journal of Colloid and Interface Science, 2009, 330(1):105-112
    [17] Kuan W H, Wang M K, Huang P M, et al. Effect of citric acid on aluminum hydrolytic speciation[J].Water Research, 2005, 39(15): 3457-3466
    [18] Liu Y, Zhang W, Yang X, et al. Advanced treatment of effluent from municipal WWTP with different metal salt coagulants: Contaminants treatability and floc properties[J].Separation and Purification Technology, 2013, 120: 123-128
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  1351
  • HTML全文浏览数:  1260
  • PDF下载数:  801
  • 施引文献:  0
出版历程
  • 收稿日期:  2014-06-10
  • 刊出日期:  2015-02-15
洪云, 张伟军, 左竟成, 刘园园, 董伟, 王东升. 不同有机体系的混凝特征研究:以硫酸铝为例[J]. 环境化学, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
引用本文: 洪云, 张伟军, 左竟成, 刘园园, 董伟, 王东升. 不同有机体系的混凝特征研究:以硫酸铝为例[J]. 环境化学, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
shu
HONG Yun, ZHANG Weijun, ZUO Jingcheng, LIU Yuanyuan, DONG Wei, WANG Dongsheng. Coagulation characteristics of different organic systems using aluminum sulfate as a coagulant[J]. Environmental Chemistry, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
Citation: HONG Yun, ZHANG Weijun, ZUO Jingcheng, LIU Yuanyuan, DONG Wei, WANG Dongsheng. Coagulation characteristics of different organic systems using aluminum sulfate as a coagulant[J]. Environmental Chemistry, 2015, 34(2): 352-357. doi: 10.7524/j.issn.0254-6108.2015.02.2014061005
shu

不同有机体系的混凝特征研究:以硫酸铝为例

  • 1.  富士康科技集团, 廊坊, 065000;
  • 2.  中国科学院生态环境研究中心环境水质学国家重点实验室, 北京, 100085;
  • 3.  重庆市永川区环境监测站, 重庆, 404100;
  • 4.  北京环球中科水务科技有限公司, 北京, 100085
  • 收稿日期:  2014-06-10
基金项目:

国家杰出青年科学基金项目(51025830)资助.

摘要: 选择牛血清蛋白和腐殖酸作为实验对象,考察了硫酸铝投加量和pH对两种有机体系有机物去除率、电荷性质以及絮体性质(粒径分布、分形维数和沉降性)的影响.实验结果发现,硫酸铝混凝对腐殖酸的去除效率要高于BSA,当硫酸铝投加量为5 mmol·L-1时,两种体系中DOC的去除率均达到最高.电中和在腐殖酸的混凝去除过程中占主导地位,而吸附架桥是BSA去除的主要机理.对于两种有机体系,随着硫酸铝投加量的升高,絮体粒径逐渐减小,而分形维数增大.相比腐殖酸体系,BSA混凝形成絮体粒径大但分形维数更小,同时絮体沉降性较差.此外,两种体系中DOC去除率在pH值等于6时均达到最高.同时,当pH值从5上升到9的过程中,BSA体系粒径逐渐增加;而在腐殖酸体系中,在pH值小于6时,絮体成长平衡时间延长,同时平衡后絮体粒径要明显大于pH值大于7条件下形成的絮体.

English Abstract

    全文HTML

参考文献 (18)

返回顶部

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心