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PAM复配混凝剂对高岭土体系混凝过程的影响

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苏航, 徐慧, 王东升, 段晋明. PAM复配混凝剂对高岭土体系混凝过程的影响[J]. 环境工程学报, 2017, 11(3): 1431-1436. doi: 10.12030/j.cjee.201511194
引用本文: 苏航, 徐慧, 王东升, 段晋明. PAM复配混凝剂对高岭土体系混凝过程的影响[J]. 环境工程学报, 2017, 11(3): 1431-1436. doi: 10.12030/j.cjee.201511194
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SU Hang, XU Hui, WANG Dongsheng, DUAN Jinming. Effects of PAM on coagulation process in kaolin system using composite coagulants[J]. Chinese Journal of Environmental Engineering, 2017, 11(3): 1431-1436. doi: 10.12030/j.cjee.201511194
Citation: SU Hang, XU Hui, WANG Dongsheng, DUAN Jinming. Effects of PAM on coagulation process in kaolin system using composite coagulants[J]. Chinese Journal of Environmental Engineering, 2017, 11(3): 1431-1436. doi: 10.12030/j.cjee.201511194
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PAM复配混凝剂对高岭土体系混凝过程的影响

  • 1.

    西安建筑科技大学环境与市政工程学院, 西安 710055

  • 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:

    国家自然科学基金青年基金资助项目（51608515）

    国家自然科学基金资助重点项目（51338010）

  • 中图分类号: X703

Effects of PAM on coagulation process in kaolin system using composite coagulants

  • 1.

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, 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: 为了解决无机混凝剂在混凝过程中的不足，选用AlCl3及其与2种不同阴离子度的PAM复配的混凝剂对高岭土体系进行混凝实验研究。结果表明：使用AlCl3做混凝剂，当投加量（以Al计）为0.1 mmol·L-1时，剩余浊度达到最低；平衡时粒径达到700 μm，且随着破碎时间的延长，絮体再生长结束后的粒径逐渐减小，在破碎时间为6.0 min时，絮体粒径最终能恢复到300 μm左右。以PAM-1复配的AlCl3为混凝剂，在投加量为0.1 mmol·L-1时，剩余浊度最低；经慢速搅拌10 min，絮体平衡时的粒径较使用AlCl3作混凝剂时略小，但随着PAM-1浓度的增大，絮体破碎后的恢复能力逐渐增大。当PAM-1与Al的比例为10%，破碎1.0 min时，絮体粒径最终可以恢复到600 μm左右。以PAM-2复配的AlCl3为混凝剂时，由于PAM-2的阴离子度过高，需要更多的混凝剂中和体系中存在的负电荷，所以在混凝剂浓度为0.2 mmol·L-1时，剩余浊度才达到最低。
    Abstract: To improve the coagulation performance of kaolin systems,AlCl3 and two composite coagulants were selected as coagulants. The results indicated that the residual turbidity decreased to the minimum when the coagulant dosage was 0.1 mmol·L-1 (calculated as Al) using AlCl3 as coagulant. The floc size was 700 μm after the growth period,and the floc size after the regrowth period decreased as the breakage period was prolonged. When the breakage period was 6.0 min,the floc size after regrowth was approximately 300 μm. When using the composite coagulants prepared by dissolving PAM-1 in AlCl3 solution,the residual turbidity also decreased to the minimum when the coagulant dosage was 0.1 mmol·L-1. The recovery factor increased with the concentration of PAM-1. When the ratio of PAM-1 to Al was 10%,the floc size after regrowth reached approximately 600 μm. When using the composite coagulants prepared by dissolving PAM-2 into AlCl3 solution,the optimum dosage was approximately 0.2 mmol·L-1 due to the larger amount of negative charge.
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  • [1] XU Hui, XIAO Feng, WANG Dongsheng. Effects of Al2O3 and TiO2 on the coagulation process by Al2(SO4)3 (AS)and poly-aluminum chloride (PACl)in kaolin suspension[J]. Separation and Purification Technology, 2014, 124:9-17
    [2] XU Hui, JIAO Ruyuan, XIAO Feng, et al. Relative importance of hydrolyzed Al species (Ala, Alb, Alc)on residual Al and effects of nano-particles (Fe-surface modified TiO2 and Al2O3)on coagulation process[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2014, 446:139-150
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出版历程
  • 收稿日期:  2016-01-15
  • 刊出日期:  2017-03-10

PAM复配混凝剂对高岭土体系混凝过程的影响

  • 1. 西安建筑科技大学环境与市政工程学院, 西安 710055
  • 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
  • 收稿日期:  2016-01-15
基金项目:

国家自然科学基金青年基金资助项目（51608515）

国家自然科学基金资助重点项目（51338010）

摘要: 为了解决无机混凝剂在混凝过程中的不足，选用AlCl3及其与2种不同阴离子度的PAM复配的混凝剂对高岭土体系进行混凝实验研究。结果表明：使用AlCl3做混凝剂，当投加量（以Al计）为0.1 mmol·L-1时，剩余浊度达到最低；平衡时粒径达到700 μm，且随着破碎时间的延长，絮体再生长结束后的粒径逐渐减小，在破碎时间为6.0 min时，絮体粒径最终能恢复到300 μm左右。以PAM-1复配的AlCl3为混凝剂，在投加量为0.1 mmol·L-1时，剩余浊度最低；经慢速搅拌10 min，絮体平衡时的粒径较使用AlCl3作混凝剂时略小，但随着PAM-1浓度的增大，絮体破碎后的恢复能力逐渐增大。当PAM-1与Al的比例为10%，破碎1.0 min时，絮体粒径最终可以恢复到600 μm左右。以PAM-2复配的AlCl3为混凝剂时，由于PAM-2的阴离子度过高，需要更多的混凝剂中和体系中存在的负电荷，所以在混凝剂浓度为0.2 mmol·L-1时，剩余浊度才达到最低。

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