高级搜索

钙离子对混凝去除水体中铜绿微囊藻的影响

,  ,  ,  , 

downloadPDF

上一篇

下一篇

吴昊澜, 杨晓芳, 沈敏丽, 刘菲, 王东升. 钙离子对混凝去除水体中铜绿微囊藻的影响[J]. 环境工程学报, 2018, 12(3): 839-847. doi: 10.12030/j.cjee.201708138
引用本文: 吴昊澜, 杨晓芳, 沈敏丽, 刘菲, 王东升. 钙离子对混凝去除水体中铜绿微囊藻的影响[J]. 环境工程学报, 2018, 12(3): 839-847. doi: 10.12030/j.cjee.201708138
shu
WU Haolan, YANG Xiaofang, SHEN Minli, LIU Fei, WANG Dongsheng. Impact of calcium ion on removal of Microcystis aeruginosa in water by coagulation[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 839-847. doi: 10.12030/j.cjee.201708138
Citation: WU Haolan, YANG Xiaofang, SHEN Minli, LIU Fei, WANG Dongsheng. Impact of calcium ion on removal of Microcystis aeruginosa in water by coagulation[J]. Chinese Journal of Environmental Engineering, 2018, 12(3): 839-847. doi: 10.12030/j.cjee.201708138
shu

钙离子对混凝去除水体中铜绿微囊藻的影响

  • 1.

    中国地质大学北京水资源与环境学院，北京 100083

  • 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

  • 基金项目:

    国家水体污染控制与治理科技重大专项 (2015ZX07406005-002)

Impact of calcium ion on removal of Microcystis aeruginosa in water by coagulation

  • 1.

    School of Water Resources and Environment, China University of GeosciencesBeijing, Beijing 100083, China

  • 2.

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

  • Fund Project:

  • 摘要: 以铜绿微囊藻为对象，研究了钙离子对聚合氯化铝（polyaluminumchloride，PAC）混凝沉淀藻细胞的影响及其可能的机理。结果表明，添加钙离子对PAC混凝去除模拟水样藻细胞和浊度均具有促进作用。在PAC摩尔浓度较低时（0.02 mmol·L-1），最高可将除藻率和除浊率分别提高66.4%和76.8%。三维荧光及总溶解性有机碳（total dissolved organic carbon，TDOC）分析表明钙离子对去除水中溶解性胞外有机物（dissolved extracellular organic matter，dEOM）没有显著作用。利用Zeta电位和絮体形态对其影响混凝除藻效果的可能机理进行探究，发现钙离子能通过压缩双电层和吸附电中和提高藻细胞表面的Zeta电位，从而促进胶体脱稳凝聚。推测钙离子通过与铜绿微囊藻表面的黏附型胞外有机物（bound extracellular organic matter，bEOM）发生阳离子架桥作用促进藻细胞脱稳混凝沉淀。钙离子能够促进铜绿微囊藻脱稳，但是絮体粒径、强度、恢复能力的主要影响因素还是PAC摩尔浓度。
    Abstract: The effects of calcium ions on polyaluminium chloride (PAC) coagulated Microcystis aeruginosa cells and its possible mechanism were studied. The results indicated that calcium ions could improve PAC coagulation efficiency by increasing simulated water algae cells removal and turbidity removal. Even if the PAC congratulation is relative low (0.02 mmol·L-1), the algae cells removal rateand turbidity removal rate were improved by 66.4% and 76.8%, respectively. Three-dimensional fluorescence analysis and TOC results showed that calcium ions had no significant effect on the removal of dissolved extracellular organic matter (dEOM) in water. The possible mechanism of coagulation and algae removal by Zeta potential and floc morphology was studied. It was found that Ca2+couldpromotethecolloid destabilization by increasing the Zeta potential of algal cells through compressing the electric double layer and adsorption charge neutralization. It is speculated that calcium ions promote the algae cell destabilization by cationic bridging with the bound extracellular organic matter (bEOM) on the surface of Microcystis aeruginosa. Although calcium ions can promote the destabilization of Microcystis aeruginosa, the main influence factor of floc diameter, strength factor, recovery factor is PAC dosage.
  • 加载中
  • [1] HENDERSON R K, PARSONS S A, JEFFERSON B.Successful removal of algae through the control of zeta potential[J].Separation Science and Technology,2008,43(7):1653-1666 10.1080/01496390801973771
    [2] ZHANG D, XU H, WANG X, et al.Influence of coagulation process on the ultrafiltration performance: The roles of Al species and characteristics of algae-laden water[J].Separation and Purification Technology,2017,183:32-42 10.1016/j.seppur.2017.04.004
    [3] GREGOR J E, FENTON E, BROKENSHIRE G, et al.Interactions of calcium and aluminium ions with alginate[J].Water Research,1996,30(6):1319-1324 10.1016/0043-1354(95)00194-8
    [4] TAKAARA T, SANO D, MASAGO Y, et al.Surface-retained organic matter of Microcystis aeruginosa inhibiting coagulation with polyaluminum chloride in drinking water treatment[J].Water Research,2010,44(13):3781-3786 10.1016/j.watres.2010.04.030
    [5] VANDAMME D, FOUBERT I, FRAEYE I, et al.Influence of organic matter generated by Chlorella vulgaris on five different modes of flocculation[J].Bioresource Technology,2012,124:508-511 10.1016/j.biortech.2012.08.121
    [6] HENDERSON R K, 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 10.1016/j.watres.2010.04.016
    [7] 乔俊莲, 董磊, 徐冉, 等. 胞外分泌物对铜绿微囊藻混凝去除的影响[J]. 同济大学学报(自然科学版),2011,39(6):879-883 10.3969/j.issn.0253-374x.2011.06.017
    [8] QI J, LAN H, LIU H, et al.Simultaneous surface-adsorbed organic matter desorption and cell integrity maintenance by moderate prechlorination to enhance Microcystis aeruginosa removal in KMnO4-Fe(II) process[J].Water Research,2016,105:551-558 10.1016/j.watres.2016.09.042
    [9] 王东升, 刘海龙, 晏明全, 等. 强化混凝与优化混凝: 必要性、研究进展和发展方向[J]. 环境科学学报,2006,26(4):544-551 10.3321/j.issn:0253-2468.2006.04.002
    [10] 马敏, 刘锐平, 刘会娟, 等. 预氯化对铝盐混凝铜绿微囊藻过程中溶解性有机物和残余铝的影响[J]. 环境科学学报,2014,34(1):73-78
    [11] 苑宝玲, 曲久辉, 张金松, 等. 高铁酸盐预氧化对颤藻去除效果及机理的研究[J]. 环境科学学报,2001,21(4):390-393 10.3321/j.issn:0253-2468.2001.04.002
    [12] 余国忠, 栗印环, 黄斌, 等. 铜绿微囊藻的混凝特性与影响因素研究[J]. 给水排水,2005,31(2):21-25 10.3969/j.issn.1002-8471.2005.02.006
    [13] POWELL R J, HILL R T.Rapid aggregation of biofuel-producing algae by the bacterium Bacillus sp.strain RP1137[J].Applied and Environmental Microbiology,2013,79(19):6093-6101 10.1128/AEM.01496-13
    [14] 胡沅胜, 刘斌, 郝晓地, 等. 微藻处理污水中的絮凝分离/采收研究现状与展望[J]. 环境科学学报,2015,35(1):12-29 10.13671/j.hjkxxb.2014.0823
    [15] 曲孟, 李秀辰, 白晓磊, 等. 用响应面法优化小球藻絮凝沉降工艺的研究[J]. 大连海洋大学学报,2014,29(1):61-65
    [16] 潘纲, 张明明, 闫海, 等. 黏土絮凝沉降铜绿微囊藻的动力学及其作用机理[J]. 环境科学,2003,24(5):1-10 10.3321/j.issn:0250-3301.2003.05.001
    [17] LELOUP M, NICOLAU R, PALLIER V, et al.Organic matter produced by algae and cyanobacteria: Quantitative and qualitative characterization[J].Journal of Environmental Sciences,2013,25(6):1089-1097 10.1016/S1001-0742(12)60208-3
    [18] MARKECHOVA D, TOMKOVA M, SADECKA J.Fluorescence excitation-emission matrix spectroscopy and parallel factor analysis in drinking water treatment: A review[J].Polish Journal of Environmental Studies,2013,22(5):1289-1295
    [19] HUDSON N, BAKER A, REYNOLDS D M.Fluorescence analysis of dissolved organic matter in natural, waste and polluted waters: A review[J].River Research and Applications,2007,23(6):631-649 10.1002/rra.1005
    [20] ISHII S K L, BOYER T H.Behavior of reoccurring PARAFAC components in fluorescent dissolved organic matter in natural and engineered systems: A critical review[J].Environmental Science & Technology,2012,46(4):2006-2017
    [21] CHEN J J, YEH H H.The mechanisms of potassium permanganate on algae removal[J].Water Research,2005,39(18):4420-4428 10.1016/j.watres.2005.08.032
    [22] GHERNAOUT B, GHERNAOUT D, SAIBA A.Algae and cyanotoxins removal by coagulation/flocculation: A review[J].Desalination and Water Treatment,2010,20(1/2/3):133-143 10.5004/dwt.2010.1202
    [23] XU H, YU G, JIANG H.Investigation on extracellular polymeric substances from mucilaginous cyanobacterial blooms in eutrophic freshwater lakes[J].Chemosphere,2013,93(1):75-81 10.1016/j.chemosphere.2013.04.077
    [24] GRANT G T, MORRIS E R, REES D A, et al.Biological interactions between polysaccharides and divalent cations: The egg-box model[J].FEBS Letters,1973,32(1):195-198 10.1016/0014-5793(73)80770-7
    [25] SCHLESINGER A, EISENSTADT D, BAR-GIL A, et al.Inexpensive non-toxic flocculation of microalgae contradicts theories; overcoming a major hurdle to bulk algal production[J].Biotechnology Advances,2012,30(5):1023-1030 10.1016/j.biotechadv.2012.01.011
    [26] SOBECK D C, HIGGINS M J.Examination of three theories for mechanisms of cation-induced bioflocculation[J].Water Research,2002,36(3):527-538 10.1016/S0043-1354(01)00254-8
    [27] YUKSELEN M A, GREGORY J.The reversibility of floc breakage[J].International Journal of Mineral Processing,2004,73(2):251-259 10.1016/S0301-7516(03)00077-2
    [28] 汤鸿霄. 无极高分子絮凝理论与絮凝剂[M]. 北京:中国建筑工业出版社,2006:90-96
    [29] JARVIS P, JEFFERSON B, GREGORY J, et al.A review of floc strength and breakage[J].Water Research,2005,39(14):3121-3137 10.1016/j.watres.2005.05.022
  • 加载中
WeChat 点击查看大图
计量
  • 文章访问数:  4697
  • HTML全文浏览数:  4038
  • PDF下载数:  528
  • 施引文献:  0
出版历程
  • 刊出日期:  2018-03-22

钙离子对混凝去除水体中铜绿微囊藻的影响

  • 1. 中国地质大学北京水资源与环境学院，北京 100083
  • 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
基金项目:

国家水体污染控制与治理科技重大专项 (2015ZX07406005-002)

摘要: 以铜绿微囊藻为对象，研究了钙离子对聚合氯化铝（polyaluminumchloride，PAC）混凝沉淀藻细胞的影响及其可能的机理。结果表明，添加钙离子对PAC混凝去除模拟水样藻细胞和浊度均具有促进作用。在PAC摩尔浓度较低时（0.02 mmol·L-1），最高可将除藻率和除浊率分别提高66.4%和76.8%。三维荧光及总溶解性有机碳（total dissolved organic carbon，TDOC）分析表明钙离子对去除水中溶解性胞外有机物（dissolved extracellular organic matter，dEOM）没有显著作用。利用Zeta电位和絮体形态对其影响混凝除藻效果的可能机理进行探究，发现钙离子能通过压缩双电层和吸附电中和提高藻细胞表面的Zeta电位，从而促进胶体脱稳凝聚。推测钙离子通过与铜绿微囊藻表面的黏附型胞外有机物（bound extracellular organic matter，bEOM）发生阳离子架桥作用促进藻细胞脱稳混凝沉淀。钙离子能够促进铜绿微囊藻脱稳，但是絮体粒径、强度、恢复能力的主要影响因素还是PAC摩尔浓度。

English Abstract

参考文献 (29)

目录

/

返回文章
返回

Copyright © 2019 中国科学院生态环境研究中心