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水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理

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刘娟, 武耀锋, 张晓慷. 水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理[J]. 环境工程学报, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
引用本文: 刘娟, 武耀锋, 张晓慷. 水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理[J]. 环境工程学报, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
shu
Liu Juan, Wu Yaofeng, Zhang Xiaokang. Flocculation capability of aqueous dispersion polyacrylamide flocculant and its mechanism[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
Citation: Liu Juan, Wu Yaofeng, Zhang Xiaokang. Flocculation capability of aqueous dispersion polyacrylamide flocculant and its mechanism[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
shu

水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理

  • 1.

    青岛科技大学环境与安全工程学院, 青岛 266042

  • 2.

    中国通用机械工程有限公司, 北京 100050

  • 3.

    青岛科技大学化工学院, 青岛 266042

  • 基金项目:

    国家自然科学基金资助项目(51308314)

  • 中图分类号: TQ326.4;TE992.2

Flocculation capability of aqueous dispersion polyacrylamide flocculant and its mechanism

  • 1.

    College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao 266042, China

  • 2.

    China National General Machinery Engineering Corporation, Beijing 100050, China

  • 3.

    College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, China

  • Fund Project:

  • 摘要: 通过高岭土烧杯实验表征了P(CMTC-AM-DMC)的絮凝效率,考察了絮凝时间、介质酸度以及搅拌强度等因素对絮凝性能的影响,并借助絮凝-解絮凝-再絮凝过程中絮体的形态变化分析该絮凝剂的絮凝机理。结果表明:pH=6~8时,在150 r/min下搅拌20 min,絮凝效率大于90%;P(CMTC-AM-DMC)的絮凝效率及絮体沉降速度随搅拌强度增大而增大;300 r/min下搅拌5 min时,絮体沉降速度可达16 mm/s,继续增大搅拌速度,达到400 r/min时,絮凝效率在5 min内即可达到100%。P(CMTC-AM-DMC)絮体化程度较高,在高强度搅拌下破碎后,可迅速聚集恢复至初始状态,并迅速下沉,实现再絮凝。该絮凝剂在不同的pH下表现出不同的絮凝机理,pH=6时,借助电性中和、吸附架桥作用,絮凝效率较高,且絮体沉降较快;pH=10~12时,絮体沉降相对较慢,絮凝效率主要为颗粒卷扫的贡献。
    Abstract: The flocculation efficiency of P (CMTC-AM-DMC) was researched by jar tests with kaolin suspension.The effects of flocculation time, pH and stirring velocity on flocculation efficiency were discussed.In addition, the flocculation mechanism was analyzed by transformation of the flocs in flocculation- deflocculation-reflocculation.The results were as follows, the flocculation efficiency could be more than 90% with 150 r/min of stirring speed for 20 min and 6~8 of pH.The flocculation efficiency of P (CMTC-AM-DMC) and setting velocity of flocs increased with the increase of stirring intensity.Flocculation efficiency could reach at 100% within 5 min under 400 r/min of stirring rate.The setting velocity could reach 16 mm/s under 300 r/min of stirring rate within 5 min.Flocs of P (CMTC-AM-DMC) could re-aggregate to form compact and stable ones with higher velocity to settle down after destroyed by the strong hydrodynamic forces.Chemical adsorption and electrostatic neutralize played important role in the flocculation of P (CMTC-AM-DMC) when pH=6, in which the flocculation efficiency was higher and the setting velocity of flocs was faster, while sweeping was dominant at pH of 10~12 with the relatively slower setting velocity of flocs.
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  • [1] 姜贵全,任世学,丁志刚.麦草碱木质素三甲基季铵盐对酸性染料溶液的絮凝性能影响.森林工程,2012,28(4):55-60 Jiang Guiquan,Ren Shixue,Ding Zhigang.Flocculability of trimethy quaternary ammonium salt of wheat-alkali-lignin for acid dye solution.Forest Engineering,2012,28(4):55-60(in Chinese)
    [2] 程烨,隋尊岩,李翠勤.一类新型聚丙烯酰胺的合成与絮凝性能研究.化学与生物工程,2013,30(1):60-63 Cheng Ye,Sui Zunyan,Li Cuiqin.Synthesis and flocculation performance of a novel polyacrylamide.Chemistry & Bioengineering,2013,30(1):60-63(in Chinese)
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  • 收稿日期:  2014-04-23
  • 刊出日期:  2014-12-30
刘娟, 武耀锋, 张晓慷. 水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理[J]. 环境工程学报, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
引用本文: 刘娟, 武耀锋, 张晓慷. 水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理[J]. 环境工程学报, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
shu
Liu Juan, Wu Yaofeng, Zhang Xiaokang. Flocculation capability of aqueous dispersion polyacrylamide flocculant and its mechanism[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
Citation: Liu Juan, Wu Yaofeng, Zhang Xiaokang. Flocculation capability of aqueous dispersion polyacrylamide flocculant and its mechanism[J]. Chinese Journal of Environmental Engineering, 2015, 9(1): 119-124. doi: 10.12030/j.cjee.20150120
shu

水分散型阳离子聚丙烯酰胺絮凝剂的絮凝性能及其机理

  • 1. 青岛科技大学环境与安全工程学院, 青岛 266042
  • 2. 中国通用机械工程有限公司, 北京 100050
  • 3. 青岛科技大学化工学院, 青岛 266042
  • 收稿日期:  2014-04-23
基金项目:

国家自然科学基金资助项目(51308314)

摘要: 通过高岭土烧杯实验表征了P(CMTC-AM-DMC)的絮凝效率,考察了絮凝时间、介质酸度以及搅拌强度等因素对絮凝性能的影响,并借助絮凝-解絮凝-再絮凝过程中絮体的形态变化分析该絮凝剂的絮凝机理。结果表明:pH=6~8时,在150 r/min下搅拌20 min,絮凝效率大于90%;P(CMTC-AM-DMC)的絮凝效率及絮体沉降速度随搅拌强度增大而增大;300 r/min下搅拌5 min时,絮体沉降速度可达16 mm/s,继续增大搅拌速度,达到400 r/min时,絮凝效率在5 min内即可达到100%。P(CMTC-AM-DMC)絮体化程度较高,在高强度搅拌下破碎后,可迅速聚集恢复至初始状态,并迅速下沉,实现再絮凝。该絮凝剂在不同的pH下表现出不同的絮凝机理,pH=6时,借助电性中和、吸附架桥作用,絮凝效率较高,且絮体沉降较快;pH=10~12时,絮体沉降相对较慢,絮凝效率主要为颗粒卷扫的贡献。

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