工业水处理 ›› 2021, Vol. 41 ›› Issue (12): 66-71, 101. doi: 10.19965/j.cnki.iwt.2021-0288

• 试验研究 • 上一篇    下一篇

改性净水污泥颗粒对水中氨氮的动态吸附研究

罗书舟1(),王东田1,2,*(),魏杰2   

  1. 1. 苏州科技大学环境科学与工程学院, 江苏苏州 215009
    2. 苏州科技大学环境功能材料重点实验室, 江苏苏州 215009
  • 收稿日期:2021-11-22 出版日期:2021-12-20 发布日期:2021-12-22
  • 通讯作者: 王东田 E-mail:2573678540@qq.com;dongtianw@163.com
  • 作者简介:罗书舟(1996-  ), 硕士研究生, E-mail: 2573678540@qq.com
  • 基金资助:
    国家自然科学基金项目(51778392)

Dynamic adsorption of ammonia nitrogen in water by modified water treatment sludge

Shuzhou LUO1(),Dongtian WANG1,2,*(),Jie WEI2   

  1. 1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
    2. Key Laboratory of Environmental Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, China
  • Received:2021-11-22 Online:2021-12-20 Published:2021-12-22
  • Contact: Dongtian WANG E-mail:2573678540@qq.com;dongtianw@163.com

摘要:

水体中过量的氨氮导致黑臭和富营养化现象发生,对水生动物造成危害。吸附法具有高效、成本低、容易操作等优点,是去除水中氨氮的理想方法之一。采用净水污泥为原料,柠檬酸钠为改性剂,通过研磨—改性—造粒—焙烧工艺制备了改性颗粒吸附剂,探究其对水中氨氮的动态吸附效能。通过SEM、BET、FT-IR分析手段对吸附剂进行表征,考察了氨氮初始质量浓度、吸附柱高度、进水流速对穿透曲线的影响,并对实验数据进行模型拟合。结果表明,穿透时间随氨氮初始质量浓度和进水流速的增大而缩短,随吸附柱高度的增加而延长。BDST模型能较准确地描述吸附柱高度与穿透时间的关系,可用于预测改变氨氮初始质量浓度时的穿透时间。

关键词: 净水污泥, 氨氮, 动态吸附, 吸附剂

Abstract:

Excessive ammonia nitrogen in water bodies leads to black odor and eutrophication, which is harmful to aquatic animals. Adsorption has the advantages of high efficiency, low cost and easy operation, which is one of the ideal methods to remove ammonia nitrogen from water. Modified granular adsorbent was prepared by grinding-modification-granulation-baking process, using water treatment sludge as raw material and trisodium citrate dihydrate as modifier, to investigate the dynamic adsorption efficiency on ammonia nitrogen in water. The adsorbents were characterized by SEM, BET and FT-IR, and the effects of the initial mass concentration of ammonia nitrogen, height of adsorption column and inlet velocity on the breakthrough curve were investigated, and the experimental data were fitted with model. The results showed that the breakthrough time decreased with the increase of initial mass concentration of ammonia nitrogen and inlet velocity, and increased with increase of the height of adsorption column. The BDST model described the relationship between height of adsorption column and breakthrough time more accurately, and could be used to predict breakthrough time when the initial mass concentration of ammonia nitrogen changed.

Key words: water treatment sludge, ammonia nitrogen, dynamic adsorption, adsorbent

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