Bio-MOF-11(Co)活化过一硫酸盐去除废水中的罗丹明B和Cu<sup>2+</sup>

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摘要采用Bio-MOF-11（Co）活化过一硫酸盐（PMS）同步去除废水中的罗丹明B（RhB）和Cu²⁺.考察了Bio-MOF-11（Co）投加量、PMS浓度、初始pH值、反应温度、RhB初始浓度和Cu²⁺浓度对RhB降解和Cu²⁺去除的影响，并采用响应面分析法优化了降解RhB的反应条件.结果表明， RhB的降解符合伪一级反应动力学. Cu²⁺最大吸附量为22.98mg/g. 在RhB初始浓度为20mg/L、Cu²⁺浓度为2.5mg/L、Bio-MOF-11（Co）浓度为80mg/L、PMS浓度为1.0mmol/L、初始pH值为7的条件下，反应15min后，RhB降解率达到98.72%，Cu²⁺去除率为73.53%，.自由基淬灭实验证实， RhB的降解通过非自由基（¹O₂）和自由基（SO₄^-·、·O₂^-和·OH）氧化的途径共同完成，Cu²⁺主要通过Bio-MOF-11（Co）的吸附作用被去除.紫外可见吸收光谱分析结果推测了RhB可能的降解路径. Bio-MOF-11（Co）活化PMS高级氧化工艺可实现同步去除有机污染物和重金属.

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	张霞玲
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	林嘉伟
	卫月星

关键词 ： Bio-MOF-11(Co), 过一硫酸盐, 罗丹明B, 铜离子, 反应机制

Abstract：Bio-MOF-11(Co) was used to activate peroxymonosulfate (PMS) for simultaneously removing rhodamine B (RhB) and Cu²⁺ from wastewater, and the effects of Bio-MOF-11(Co) dosage, PMS concentration, initial pH value, reaction temperature, initial concentration of RhB and Cu²⁺ concentration on the degradation of RhB and the removal of Cu²⁺ were evaluated. Experimental results indicate that the degradation of RhB was in accordance with the pseudo-first-order reaction kinetics and the maximum adsorption of Cu²⁺ was 22.98mg/g. The degradation efficiency of RhB and the removal rate of Cu²⁺ after the reaction of 15min reached to 98.2% and 73.3%, respectively, under the optimal conditions of 20mg/L RhB, 2.5mg/L Cu²⁺, 80mg/L Bio-MOF-11(Co), 1.0mmol/L PMS, pH 7.0, and reaction temperature of 25℃. Free radical quenching experiments confirmed that RhB could be degraded by both non-free radical (¹O₂) and free radical (SO₄^-·, ·O₂^- and ·OH) oxidation as inferred by UV-VIS absorption spectrum analysis, and Cu²⁺ could be removed by Bio-MOF-11(Co) adsorption. Simultaneous removal of organic pollutants and heavy metals could be achieved in Bio-MOF-11(Co)-activated peroxymonosulfate (PMS) system.

Key words： Bio-MOF-11(Co) peroxymonosulfate rhodamine B copper ion reaction mechanism

收稿日期: 2023-05-31

PACS:

X703.5

基金资助:国家自然科学基金资助项目（22206149）；山西省自然科学基金资助项目（201801D121274）

通讯作者: 苏冰琴,副教授,subingqin@tyut.edu.cn E-mail: subingqin@tyut.edu.cn

作者简介: 张霞玲(1999-),女,山西阳泉人,太原理工大学硕士研究生,主要研究方向为水处理高级氧化技术的研究.1085776095@qq.com.

引用本文:

张霞玲, 苏冰琴, 宋鑫峂, 赵文博, 林嘉伟, 卫月星. Bio-MOF-11(Co)活化过一硫酸盐去除废水中的罗丹明B和Cu²⁺[J]. 中国环境科学, 2024, 44(2): 755-767. ZHANG Xia-ling, SU Bing-qin, SONG Xing-tong, ZHAO Wen-bo, LIN Jia-wei, WEI Yue-xing. Bio-MOF-11 (Co) activated PMS for simultaneously removing rhodamine B and Cu²⁺ from wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(2): 755-767.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2024/V44/I2/755

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