复合吸附剂对二级出水中溶解性有机物的吸附特性研究

doi:10.16039/j.cnki.cn22-1249.2022.05.020

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摘要

使用壳聚糖（CS）和粉末活性炭（PAC）复配制备了一种复合吸附剂（CS-PAC），用于对污水厂二级出水中溶解性有机物（DOM）的吸附，以UV254作为DOM浓度的检测参数，研究复合吸附剂对DOM的吸附性能及其动力学特性。实验结果表明，DOM去除率随吸附质浓度的增加而升高，随复合吸附剂投加量的增大和接触时间的延长先增大后趋于稳定，吸附60 min基本达到平衡，DOM最高去除率达到74.17%。吸附动力学研究表明，吸附过程更加符合Freundlich模型，由多层吸附主导；复合吸附剂对DOM的吸附过程适合用二级动力学描述，主要吸附作用为化学吸附。

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	叶志浩
	王建辉
	赵航
	任加慧
	闫娇
	刘俞辰

关键词: 壳聚糖粉末活性炭溶解性有机物吸附动力学复合吸附剂

Abstract:

A composite adsorbent (CS-PAC) was prepared using chitosan (CS) and powdered activated carbon (PAC) for the adsorption of dissolved organic matter (DOM) in the secondary effluent of a sewage plant, with UV254 as the DOM The detection parameters of the concentration were used to study the adsorption performance and kinetic characteristics of the composite adsorbent on DOM. The experimental results show that the removal rate of DOM increases with the increase of the adsorbate concentration. With the increase of the dosage of the composite adsorbent and the extension of the contact time, it first increases and then tends to be stable. The adsorption basically reaches equilibrium after 60 min, and the highest removal rate of DOM reached 74.17%. The adsorption kinetics study shows that the adsorption process is more in line with the Freundlich model and is dominated by multi-layer adsorption; the adsorption process of the composite adsorbent to DOM is suitable for the description of second-order kinetics, and the main adsorption is chemical adsorption.

Key words: chitosan powdered activated carbon dissolved organic matter adsorption kinetics composite adsorbent

出版日期: 2022-05-25 发布日期: 2022-05-25 整期出版日期: 2022-05-25

ZTFLH:

O647.32

引用本文:

叶志浩, 王建辉, 赵航, 任加慧, 闫娇, 刘俞辰. 复合吸附剂对二级出水中溶解性有机物的吸附特性研究 [J]. 吉林化工学院学报, 2022, 39(5): 101-106.
YE Zhihao, WANG Jianhui, ZHAO Hang, REN Jiahui, YAN Jiao, LIU Yuchen. Adsorption Characteristics of Composite Adsorbent for Dissolved Organic Matter in Secondary Effluent . Journal of Jilin Institute of Chemical Technology, 2022, 39(5): 101-106.

链接本文:

http://xuebao.jlict.edu.cn/CN/10.16039/j.cnki.cn22-1249.2022.05.020 或 http://xuebao.jlict.edu.cn/CN/Y2022/V39/I5/101

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