改性陶瓷膜催化PMS氧化的二级出水处理特性

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摘要以高效去除污水厂二级出水中溶解性有机物为目的,设计了两种由碳基催化剂(N-C、Fe/N-C)制成的高效渗透无损催化陶瓷膜(N-C-CM、Fe/N-C-CM),建立了复合催化膜原位活化过氧单硫酸盐(PMS)过滤体系,探明了复合催化膜的最佳反应条件.结果表明,在催化剂负载量为0.15g,PMS投加量为15mmol/L, pH值为9的条件下,相较PMS直接氧化结合原始陶瓷膜(VCM)过滤与N-C-CM原位活化PMS过滤体系,Fe/N-C-CM原位活化PMS过滤体系对二级出水中TOC、色度和UV₂₅₄去除率最高,分别为62.83%、81.42%、56.62%,出水浑浊度为0.00NTU.通过对比有无PMS时3种陶瓷膜在相同条件下过滤二级出水后的膜比通量、膜污染阻力分布与反冲洗后的膜通量恢复率,进一步证实了Fe/N-C-CM原位活化PMS过滤体系能减少膜表面污染物聚集,从而有效缓解膜污染.通过EPR进一步证实Fe/N-C-CM原位活化PMS过滤体系较PMS直接氧化结合VCM过滤与N-C-CM原位活化PMS过滤体系产生更多的SO₄^-·、·OH和¹O₂.

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	朱烨
	朱秀荣
	金鑫
	李恪谦
	刘梦稳
	王根
	金鹏康
	王晓昌

关键词 ：复合催化膜, 铁氮共掺杂生物炭, 过氧单硫酸盐活化, 膜污染, 二级出水

Abstract：In order to obtain high removal efficiency of dissolved organic matter from secondary effluent of wastewater treatment plant, two kinds of highly efficient permeable non-destructive catalytic ceramic membranes (N-C-CM, Fe/N-C-CM) made of carbon-based catalysts (N-C, Fe/N-C) were designed in this study, the in situ activated PMS filtration system using composite catalytic membrane was established, and the optimal operational conditions of composite catalytic membrane were also investigated. The results showed that at the optimal operational conditions (catalyst loading 0.15g, PMS dosage 15 mmol/L and pH 9), the removal efficiency of TOC, color and UV₂₅₄in secondary effluent were 62.83%, 81.42% and 56.62%, turbidity is 0.00 NTU, respectively using Fe/N-C-CM activated PMS filtration system, which was generally higher than PMS direct oxidation combined with the original ceramic membrane (VCM) filtration and N-C-CM in situ activated PMS filtration system. By comparing the membrane specific flux, membrane fouling resistance distribution and membrane flux recovery rate of the three ceramic membranes after filtration of secondary effluent under the same conditions with or without PMS, it was further confirmed that Fe/N-C-CM in situ activated PMS filtration system can reduce the concentration of pollutants on the membrane surface, thus effectively alleviate membrane fouling. EPR analysis further proved that Fe/N-C-CM in situ activated PMS filtration system produced more SO₄^-·, ·OH and ¹O₂ than PMS direct oxidation combined with VCM filtration and N-C-CM in situ activated PMS filtration system.

Key words： composite catalytic membrane Fe/N co-doped biochar peroxymonosulfate activation membrane fouling secondary effluent

收稿日期: 2022-09-15

PACS:

X703

基金资助:国家自然科学基金资助项目(52170052,52070151);陕西省重点研发计划(2021ZDLSF05-06)

通讯作者: 金鹏康,教授,pkjin@xjtu.edu.cn E-mail: pkjin@xjtu.edu.cn

作者简介: 朱烨(1998-),女,黑龙江哈尔滨人,西安建筑科技大学硕士研究生,主要研究方向为污废水深度处理与资源化利用.yuyumail21@163.com.

引用本文:

朱烨, 朱秀荣, 金鑫, 李恪谦, 刘梦稳, 王根, 金鹏康, 王晓昌. 改性陶瓷膜催化PMS氧化的二级出水处理特性[J]. 中国环境科学, 2023, 43(4): 1706-1715. ZHU Ye, ZHU Xiu-rong, JIN Xin, LI Ke-qian, LIU Meng-wen, WANG Gen, JIN Peng-kang, WANG Xiao-chang. PMS oxidation catalyzed by modified ceramic membrane for the treatment of secondary effluent. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(4): 1706-1715.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2023/V43/I4/1706

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