Efficient degradation of carbamazepine by organo-montmorillonite supported nCoFe2O4-activated peroxymonosulfate process
Efficient degradation of carbamazepine by organo-montmorillonite supported nCoFe2O4-activated peroxymonosulfate process
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有机蒙脱石支持的 nCoFe2O4 激活的过一硫酸盐工艺有效降解卡马西平
DOI：
10.1016/j.cej.2019.02.137
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发表时间：
2019-07
影响因子：
15.1
通讯作者：
Gang Yu
中科院分区：
文献类型：
--
作者：
Junxue Wu;Giovanni Cagnetta;Bin Wang;Yuezong Cui;Shubo Deng;Yujue Wang;Jun Huang;Gang Yu
卡马西平（Carbamazepine，CBZ）是水生态系统中最常见的药物污染物之一，传统技术难以有效去除。研究了有机蒙脱土负载nCoFe 2 O 4（nCoFe 2 O 4/OMt）活化过一硫酸盐（PMS）对CBZ的降解作用。在pH 6.8和25 °C下，在0.4 g L− 1 nCoFe 2 O 4/OMt和0.5 mM PMS存在下，CBZ（5 mg L−1）的降解效率在60 min内为93%，遵循伪一级动力学。较高的PMS浓度和较低的初始pH值可以促进CBZ的降解。Cl-、NO3-和HCO 3-的存在分别对CBZ的降解表现出明显的增强、轻微的抑制和明显的抑制作用。高浓度的腐殖酸会降低CBZ的降解。X射线光电子能谱分析表明，在CBZ降解过程中，Co2+/Co 3+和Fe 2 +/Fe 3+都参与了PMS的活化过程。电子顺磁共振和自由基清除实验证实了dotOH和SO 4自由基dot−对CBZ的降解起主导作用。通过LC-MS/MS鉴定降解产物，以了解可能的途径。
Carbamazepine (CBZ) is one of most frequently detected pharmaceutical contaminants in water ecosystem, which cannot be removed efficiently by traditional techniques. Degradation of CBZ by peroxymonosulfate (PMS) activated with organo-montmorillonite supported nCoFe2O4(nCoFe2O4/OMt) was investigated in this study. The degradation efficiency of CBZ (5 mg L−1) was 93% within 60 min in the presence of 0.4 g L−1nCoFe2O4/OMt and 0.5 mM PMS at pH 6.8 and 25 °C, following a pseudo-first order kinetics. High PMS concentration and low initial pH could enhance CBZ degradation. The presence of Cl−, NO3−and HCO3−showed marked enhancement, slight suppression and obvious inhibition of CBZ degradation, respectively. High concentration of humic acid could decrease the CBZ degradation. X-ray photoelectron spectroscopy of nCoFe2O4/OMt before and after reaction revealed that both Co2+/Co3+and Fe2+/Fe3+were involved in PMS activation during the CBZ degradation. Electron paramagnetic resonance and radical scavenger experiments confirmed that bothradical dotOH and SO4radical dot−played a predominant role on the CBZ degradation. The degradation products were identified by LC–MS/MS to understand the possible pathways.
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影响因子：
6
作者：
Ya-qin Liang;Hui Li
通讯作者：
Ya-qin Liang;Hui Li
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影响因子：
8.6
作者：
Wang Qiongfang;Shao Yisheng;Gao Naiyun;Chu Wenhai;Chen Juxiang;Lu Xian;Zhu Yanping;An Na
通讯作者：
An Na
影响因子：
13.6
作者：
Zhao-hui Wang;Ruixia Yuan;Yaoguang Guo;Lei Xu;Jianshe Liu
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影响因子：
13.6
作者：
Zhang Huijuan;Liu Xitao;Ma Jun;Lin Chunye;Qi Chengdu;Li Xiaowan;Zhou Zhou;Fan Guoxuan
通讯作者：
Fan Guoxuan
DOI：
10.2166/9781780407197_0429
发表时间：
2017-05
期刊：
Water intelligence online
影响因子：
--
作者：
N. K. Leitner
通讯作者：
N. K. Leitner