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pH对铝盐絮凝剂形态分布与混凝除氟性能的影响

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鞠佳伟, 高玉萍, 何赞, 刘锐平. pH对铝盐絮凝剂形态分布与混凝除氟性能的影响[J]. 环境工程学报, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
引用本文: 鞠佳伟, 高玉萍, 何赞, 刘锐平. pH对铝盐絮凝剂形态分布与混凝除氟性能的影响[J]. 环境工程学报, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
shu
Ju Jiawei, Gao Yuping, He Zan, Liu Ruiping. Effect of pH on aluminum species distribution and removal of fluoride by different Al coagulants[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
Citation: Ju Jiawei, Gao Yuping, He Zan, Liu Ruiping. Effect of pH on aluminum species distribution and removal of fluoride by different Al coagulants[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
shu

pH对铝盐絮凝剂形态分布与混凝除氟性能的影响

  • 1.

    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:

    国家自然科学基金资助项目(21177143, 21177144)

    国家水体污染控制与治理科技重大专项(2015ZX07402-003)

  • 中图分类号: X703.5

Effect of pH on aluminum species distribution and removal of fluoride by different Al coagulants

  • 1.

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

  • Fund Project:

  • 摘要: 对比研究了AlCl3和3种不同碱化度的聚合氯化铝(PACl)在不同pH与投量下除氟效果,并对不同形态铝盐除氟机理进行了初步探讨.结果表明,pH对絮凝剂水解后铝形态分布及其除氟效果有重要影响.pH 5~6时,Al3+和Al2、Al3等低聚态铝为AlCl3主要形态,且AlCl3更易水解生成可将溶解态氟转化为颗粒态氟的A1(OH)3,从而较PACl具有更佳除氟效果.pH >7时,PACl较AlCl3具有更佳除氟效果,且增大PACl碱化度可促进氟的去除,这主要是由于具有较高Al13含量的PACl更容易与电负性F-结合所致;且絮凝剂混凝除氟絮体ζ电位越高,越利于F-在絮体表面吸附.
    Abstract: This study compared the removal of fluoride by AlCl3 and polyaluminum chloride (PACl) at different pH and dosages and proposed the mechanisms accordingly. The results indicate that pH has a big impact on the defluoridation process due to different aluminum species in hydrolysis process. At pH 5~6, AlCl3 exists in the form of monomer and small polymeric aluminum species and shows better performance in removing fluoride than PACl. However, at pH >7, PACl is better than that of AlCl3 in removal of fluoride. Besides, PACl with a larger value of [OH]/[A13+] is better for defluoridation due to affinity between Al13 and fluoride. Higher ζ potential is benefit for negatively-charged fluoride adsorbed on the surface of the flocs and leads to better performance in defluoridation process.
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  • [1] Ayoob S., Gupta A. K. Fluoride in drinking water: a review on the status and stress effects. Critical Reviews in Environmental Science and Technology, 2006, 36(6): 433-487
    [2] Mohapatra M., Anand S., Mishra B. K., et al. Review of fluoride removal from drinking water. Journal of Environmental Management, 2009, 91(1): 67-77
    [3] Ma Jianqing, Shen Yu, Shen Chensi, et al. Al-doping chitosan-Fe (III) hydrogel for the removal of fluoride from aqueous solutions. Chemical Engineering Journal, 2014, 248(15): 98-106
    [4] Arar O., Yavuz E. Yuksel U., et al. Separation of low concentration of fluoride from water by electrodialysis (ED) in the presence of chloride and sulfate ions. Separation Science and Technology, 2009, 44(7): 1562-1573
    [5] Chang M. F., Liu J. C. Precipitation removal of fluoride from semiconductor wastewater. Journal of Environmental Engineering, 2007, 133(4): 419-425
    [6] Deng Shubo, Liu Han, Zhou Wei, et al. Mn-Ce oxide as a high-capacity adsorbent for fluoride removal from water. Journal of Hazardous Materials, 2011, 186(2-3): 1360-1366
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    [8] Lu N. C., Liu J. C. Removal of phosphate and fluoride from wastewater by a hybrid precipitation-microfiltration process. Separation and Purification Technology, 2010, 74(3): 329-335
    [9] Khatibikamal V., Torabian A., Janpoor F., et al. Fluoride removal from industrial wastewater using electrocoagulation and its adsorption kinetics. Journal of Hazardous Materials, 2010, 179(1-3): 276-280
    [10] Dolar D., Košutić K., Vućić B. RO/NF treatment of wastewater from fertilizer factory: Removal of fluoride and phosphate. Desalination, 2011, 265(1-3): 237-241
    [11] Lin L. Jr, Huang C., Chin C. J. M., et al. The origin of Al(OH)3-rich and Al13-aggregate flocs composition in PACll coagulation. Water Research, 2009, 43(17): 4285-4295
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  • 收稿日期:  2014-05-26
  • 刊出日期:  2015-06-09
鞠佳伟, 高玉萍, 何赞, 刘锐平. pH对铝盐絮凝剂形态分布与混凝除氟性能的影响[J]. 环境工程学报, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
引用本文: 鞠佳伟, 高玉萍, 何赞, 刘锐平. pH对铝盐絮凝剂形态分布与混凝除氟性能的影响[J]. 环境工程学报, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
shu
Ju Jiawei, Gao Yuping, He Zan, Liu Ruiping. Effect of pH on aluminum species distribution and removal of fluoride by different Al coagulants[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
Citation: Ju Jiawei, Gao Yuping, He Zan, Liu Ruiping. Effect of pH on aluminum species distribution and removal of fluoride by different Al coagulants[J]. Chinese Journal of Environmental Engineering, 2015, 9(6): 2563-2568. doi: 10.12030/j.cjee.20150605
shu

pH对铝盐絮凝剂形态分布与混凝除氟性能的影响

  • 1. 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
  • 收稿日期:  2014-05-26
基金项目:

国家自然科学基金资助项目(21177143, 21177144)

国家水体污染控制与治理科技重大专项(2015ZX07402-003)

摘要: 对比研究了AlCl3和3种不同碱化度的聚合氯化铝(PACl)在不同pH与投量下除氟效果,并对不同形态铝盐除氟机理进行了初步探讨.结果表明,pH对絮凝剂水解后铝形态分布及其除氟效果有重要影响.pH 5~6时,Al3+和Al2、Al3等低聚态铝为AlCl3主要形态,且AlCl3更易水解生成可将溶解态氟转化为颗粒态氟的A1(OH)3,从而较PACl具有更佳除氟效果.pH >7时,PACl较AlCl3具有更佳除氟效果,且增大PACl碱化度可促进氟的去除,这主要是由于具有较高Al13含量的PACl更容易与电负性F-结合所致;且絮凝剂混凝除氟絮体ζ电位越高,越利于F-在絮体表面吸附.

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