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质子化壳聚糖的除磷性能

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仉春华, 王文君, 安晓雯, 郝艳楠. 质子化壳聚糖的除磷性能[J]. 环境工程学报, 2013, 7(2): 568-572.
引用本文: 仉春华, 王文君, 安晓雯, 郝艳楠. 质子化壳聚糖的除磷性能[J]. 环境工程学报, 2013, 7(2): 568-572.
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Zhang Chunhua, Wang Wenjun, An Xiaowen, Hao Yannan. Dephosphorization effect of protonated chitosan[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 568-572.
Citation: Zhang Chunhua, Wang Wenjun, An Xiaowen, Hao Yannan. Dephosphorization effect of protonated chitosan[J]. Chinese Journal of Environmental Engineering, 2013, 7(2): 568-572.
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质子化壳聚糖的除磷性能

  • 1.

    大连民族学院环境科学与工程系,大连 116600

  • 2.

    辉瑞制药有限公司,大连 116600

  • 基金项目:

    辽宁省自然科学基金项目(201102041)

  • 中图分类号: X703

Dephosphorization effect of protonated chitosan

  • 1.

    Department of Environmental Science and Engineering, Dalian Nationalities University, Dalian 116600, China

  • 2.

    Pfizer Pharmaceuticals Limited, Dalian 116600, China

  • Fund Project:

  • 摘要: 壳聚糖是一类无毒无害的天然高分子絮凝剂,为了提高壳聚糖在污水处理中的除磷性能,采用硫酸溶液对壳聚糖进行质子化改性;考察了质子化度(硫酸溶液pH值)、吸附时间以及原水pH值对除磷效率的影响。研究结果表明,质子化度越大,总磷去除效率越高;在吸附时间为40~50 min的范围内,总磷去除率最大;原水pH值对质子化壳聚糖的总磷去除效率有明显影响,在质子化度较低时(硫酸溶液pH值≥3),随着原水pH值的增加,总磷去除率降低,在质子化度较高时(硫酸溶液pH值=2),在原水pH=6时,总磷去除率最大;质子化壳聚糖的吸附过程较好地遵循Lagergren准二级动力学模型和Langmuir吸附等温方程,吸附热力学参数ΔHGS<0,吸附过程表现为放热、自发的单分子层化学吸附过程。
    Abstract: Chitosan is a natural macromolecule innoxious flocculant. Chitosan was protonated by sulfuric acid solution to enhance dephosphorization effect in wastewater treatment. The effect of protonation degree (pH value in sulfuric acid solution), adsorption time and pH value in raw water on dephosphorizing efficiency was researched. The results showed that bigger protonation degree can result in higher total phosphate removal rate (TPRR); TPRR was highest at 40~50 min of adsorption time; pH value in raw water had obviously effect on TPRR of protonated chitosan. TPRR decreased with pH value of raw water increasing when protonation degree was lower (pH ≥3 in sulfuric acid solution); TPRR was highest at pH = 6 in raw water when protonation degree was bigger (pH = 2 in sulfuric acid solution). The absorption process of protonated chitosan better fitted to pseudo-second order Lagergren equation and Langmuir absorption equation. Thermodynamics parameters of adsorption were ΔHGS<0, adsorption behavior was exothermic, spontaneous and single molecular layer chemical adsorption process.
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出版历程
  • 收稿日期:  2012-02-23
  • 刊出日期:  2013-02-02

质子化壳聚糖的除磷性能

  • 1. 大连民族学院环境科学与工程系,大连 116600
  • 2. 辉瑞制药有限公司,大连 116600
  • 收稿日期:  2012-02-23
基金项目:

辽宁省自然科学基金项目(201102041)

摘要: 壳聚糖是一类无毒无害的天然高分子絮凝剂,为了提高壳聚糖在污水处理中的除磷性能,采用硫酸溶液对壳聚糖进行质子化改性;考察了质子化度(硫酸溶液pH值)、吸附时间以及原水pH值对除磷效率的影响。研究结果表明,质子化度越大,总磷去除效率越高;在吸附时间为40~50 min的范围内,总磷去除率最大;原水pH值对质子化壳聚糖的总磷去除效率有明显影响,在质子化度较低时(硫酸溶液pH值≥3),随着原水pH值的增加,总磷去除率降低,在质子化度较高时(硫酸溶液pH值=2),在原水pH=6时,总磷去除率最大;质子化壳聚糖的吸附过程较好地遵循Lagergren准二级动力学模型和Langmuir吸附等温方程,吸附热力学参数ΔHGS<0,吸附过程表现为放热、自发的单分子层化学吸附过程。

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