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改性沸石吸附低浓度氨氮废水及其脱附的研究

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唐登勇, 郑正, 郭照冰, 林志荣, 董超, 王晓兰. 改性沸石吸附低浓度氨氮废水及其脱附的研究[J]. 环境工程学报, 2011, 5(2): 293-296.
引用本文: 唐登勇, 郑正, 郭照冰, 林志荣, 董超, 王晓兰. 改性沸石吸附低浓度氨氮废水及其脱附的研究[J]. 环境工程学报, 2011, 5(2): 293-296.
shu
Tang Dengyong, Zheng Zheng, Guo Zhaobing, Lin Zhirong, Dong Chao, Wang Xiaolan. Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption[J]. Chinese Journal of Environmental Engineering, 2011, 5(2): 293-296.
Citation: Tang Dengyong, Zheng Zheng, Guo Zhaobing, Lin Zhirong, Dong Chao, Wang Xiaolan. Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption[J]. Chinese Journal of Environmental Engineering, 2011, 5(2): 293-296.
shu

改性沸石吸附低浓度氨氮废水及其脱附的研究

  • 1.

    江苏省大气环境监测与污染控制高技术研究重点实验室，南京 210044；2.南京信息工程大学循环经济与清洁生产研究中心,南京 210044；3.南京信息工程大学环境科学与工程学院，南京 210044

  • 4.

    复旦大学环境科学与工程系，上海 200433

  • 3.

    南京信息工程大学环境科学与工程学院，南京 210044

  • 基金项目:

    国家水体污染控制与治理科技重大专项“十一·五”太湖水专项资助(2008ZX07101-004)

  • 中图分类号: X703

Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption

  • 4.

    Department of Environmental Science & Engineering, Fudan University, Shanghai 200433, China

  • 3.

    School of Environmental Science and Engineering, Nanjing University of Information Science & Technology,Nanjing 210044, China

  • Fund Project:

  • 摘要: 采用氯化钠溶液对浙江某地天然沸石改性，以低浓度氨氮废水为处理对象，比较了天然沸石和改性沸石的吸附等温线、吸附动力学和动态吸附，并进行了改性沸石的动态脱附研究。结果表明，沸石的平衡吸附量随着平衡浓度的增大而增大；Freundlich方程比Langmuir方程更好地描述沸石吸附低浓度氨氮废水的行为，改性沸石比天然沸石具有更大的吸附氨氮能力。假二级方程很好地拟合沸石吸附动力学实验数据。装填105 g的改性沸石吸附柱有效处理20 mg/L氨氮的废水量为40 L，是装填相同质量天然沸石吸附柱的2.67倍，出水氨氮浓度小于5 mg/L。用含氯化钠和氢氧化钠的溶液脱附改性沸石吸附柱吸附的氨氮，脱附率为95.2％。
    Abstract: Sodium chloride aqueous solution was used to modify the natural zeolite obtained from Zhejiang Province and the properties of low-concentration ammonia-nitrogen (NH3-N) adsorption from wastewater for the zeolites were studied. The adsorption isotherms, adsorption kinetics and dynamic adsorption adsorption were compared between the natural zeolite and the modified zeolite, and dynamic desorption of NH3-N from the modified zeolite was also conducted. The results showed that the equilibrium adsorption quantity increased with increasing equilibrium concentration and Freundlich equation was better to predict the experimental data than Langmuir equation. The modified zeolite had higher adsorption capacity than the natural zeolite. The adsorption kinetic data were fitted well by the pseudosecond-order kinetic model. Forty-liter wastewater containing 20 mg/L NH3-N was effectively treated by the adsorption column with 105 g modified zeolite, which was 2.67 times that of the adsorption column with equal mass natural zeolite, and the concentration of NH3-N was less than 5 mg/L in the effluent. The desorption efficiency of NH3-N from the modified zeolite was to 95.2% using the mixture of NaCl and NaOH solution.
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  • 收稿日期:  2010-05-04
唐登勇, 郑正, 郭照冰, 林志荣, 董超, 王晓兰. 改性沸石吸附低浓度氨氮废水及其脱附的研究[J]. 环境工程学报, 2011, 5(2): 293-296.
引用本文: 唐登勇, 郑正, 郭照冰, 林志荣, 董超, 王晓兰. 改性沸石吸附低浓度氨氮废水及其脱附的研究[J]. 环境工程学报, 2011, 5(2): 293-296.
shu
Tang Dengyong, Zheng Zheng, Guo Zhaobing, Lin Zhirong, Dong Chao, Wang Xiaolan. Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption[J]. Chinese Journal of Environmental Engineering, 2011, 5(2): 293-296.
Citation: Tang Dengyong, Zheng Zheng, Guo Zhaobing, Lin Zhirong, Dong Chao, Wang Xiaolan. Study on ammonianitrogen adsorption from low concentration wastewater by modified zeolite and its desorption[J]. Chinese Journal of Environmental Engineering, 2011, 5(2): 293-296.
shu

改性沸石吸附低浓度氨氮废水及其脱附的研究

  • 1. 江苏省大气环境监测与污染控制高技术研究重点实验室，南京 210044；2.南京信息工程大学循环经济与清洁生产研究中心,南京 210044；3.南京信息工程大学环境科学与工程学院，南京 210044
  • 4. 复旦大学环境科学与工程系，上海 200433
  • 3. 南京信息工程大学环境科学与工程学院，南京 210044
  • 收稿日期:  2010-05-04
基金项目:

国家水体污染控制与治理科技重大专项“十一·五”太湖水专项资助(2008ZX07101-004)

摘要: 采用氯化钠溶液对浙江某地天然沸石改性，以低浓度氨氮废水为处理对象，比较了天然沸石和改性沸石的吸附等温线、吸附动力学和动态吸附，并进行了改性沸石的动态脱附研究。结果表明，沸石的平衡吸附量随着平衡浓度的增大而增大；Freundlich方程比Langmuir方程更好地描述沸石吸附低浓度氨氮废水的行为，改性沸石比天然沸石具有更大的吸附氨氮能力。假二级方程很好地拟合沸石吸附动力学实验数据。装填105 g的改性沸石吸附柱有效处理20 mg/L氨氮的废水量为40 L，是装填相同质量天然沸石吸附柱的2.67倍，出水氨氮浓度小于5 mg/L。用含氯化钠和氢氧化钠的溶液脱附改性沸石吸附柱吸附的氨氮，脱附率为95.2％。

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