Removal of β-cyclocitral by UV/persulfate and UV/chlorine process: Degradation kinetics and DBPs formation

被引：0
|
作者：
Xiang, Huiming [1 ]
Shao, Yisheng [1 ]
Gao, Naiyun [1 ]
Lu, Xian [2 ]
An, Na [1 ]
Chu, Wenhai [1 ]
机构：
[1] State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, China
[2] College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai,201306, China
来源：
Chemical Engineering Journal | 2021年 / 382卷
关键词：
β-cyclocitral is a taste and odor (T&O) compounds and can cause malodorous problems in drinking water. This study focused on the kinetics and disinfection by-products (DBPs) formation of β-cyclocitral degradation by UV/persulfate (UV/PS) and UV/free chlorine processes. The degradation of β-cyclocitral in the two processes well fitted the first-order kinetic model. The second-order rate constant of β-cyclocitral with SO4·-; OH·; and Cl· were estimated to be (8.6 ± 0.12) × 109 M−1 s−1; (6.89; ±; 0.42); ×; 109; M−1; s−1; and (9.58 ± 0.38) × 109 M−1 s−1 at pH 7.0; respectively. For UV/PS system; SO4·- contributed more than OH· does; while Cl· accounted for most degradation in UV/free chlorine process. The degradation rate increased with the increasing PS and chlorine dosage. For UV/PS process; the degradation rate constant (kobs; β-cyclocitral) was observed to be the highest at pH 7.0. For UV/free chlorine process; kobs; β-cyclocitral was found to be the highest at pH 5.0 and decreased substantially at pH 9.0. Presence of high concentration (5 mM) anions (chloride; bicarbonate) showed inhibition effect on the β-cyclocitral degradation. Dramatic decreasing was observed in the presence of NOM in both UV/PS and UV/free chlorine process. Compared with UV/PS system; UV/free chlorine was more suitable for treating waters containing β-cyclocitral because of the serious inhibition in real water matrix. UV/PS pretreatment reduced the trichlormethane (TCM) yield after post-chlorination; while enhanced the yield of dichloro acetaldehyde (DCAL). UV/free chlorine pretreatment promoted the formation of both TCM and DCAL. The theoretical cytotoxicity UV/PS pretreatment and post-chlorination is observed to be the highest due to the great amount of DCAL generation. Although UV/PS and UV/free chlorine processes can effectively degrade the β-cyclocitral; the selection of two processes should be carefully balanced against the DBPs formation in post-chlorination. © 2019 Elsevier B.V;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Journal article (JA)
引用
收藏
相关论文
共 50 条
  • [21] Mechanism, kinetics and DBPs formation of UV/NH2Cl process on sulfathiazole removal in aqueous solution
    Zhang, Jiayu
    Wang, Qiongfang
    Dong, Lei
    Rao, Pinhua
    Zhang, Xin
    Gao, Naiyun
    Yin, Xiaoying
    WATER RESOURCES AND INDUSTRY, 2023, 30
  • [22] Degradation Kinetics and Disinfection By-Product Formation of Iopromide during UV/Chlorination and UV/Persulfate Oxidation
    Hu, Chenyan
    Wang, Qiangbing
    Lin, Yi-Li
    Zhu, Yeye
    Xiong, Cun
    Huang, Dandan
    Xu, Ling
    WATER, 2022, 14 (03)
  • [23] Degradation of tetracycline by UV/Fe3+/persulfate process: Kinetics, mechanism, DBPs yield, toxicity evaluation and bacterial community analysis
    Zeng, Hanxuan
    Shen, Shuwen
    Cai, Anhong
    Sun, Qian
    Wang, Lei
    Zhu, Shijun
    Li, Xueyan
    Deng, Jing
    CHEMOSPHERE, 2022, 307
  • [24] The influence of bromide on the degradation of sulfonamides in UV/free chlorine treatment: Degradation mechanism, DBPs formation and toxicity assessment
    Xiang, Huiming
    Shao, Yisheng
    Gao, Naiyun
    Lu, Xian
    Chu, Wenhai
    An, Na
    Tan, Chaoqun
    Zheng, Xuhui
    Gao, Yuqiong
    CHEMICAL ENGINEERING JOURNAL, 2019, 362 : 692 - 701
  • [25] Degradation kinetics and disinfection by-products formation of benzophenone-4 during UV/persulfate process
    Hu, Chen-Yan
    Xiong, Cun
    Lin, Yi-Li
    Zhang, Tian-Yang
    ENVIRONMENTAL TECHNOLOGY, 2023,
  • [26] Kinetics and pathways of ibuprofen degradation by the UV/chlorine advanced oxidation process
    Xiang, Yingying
    Fang, Jingyun
    Shang, Chii
    WATER RESEARCH, 2016, 90 : 301 - 308
  • [27] Comparison of ciprofloxacin degradation in reclaimed water by UV/chlorine and UV/persulfate advanced oxidation processes
    Yang, Haiyan
    Li, Yi
    Chen, Yihua
    Ye, Guihong
    Sun, Xiaobo
    WATER ENVIRONMENT RESEARCH, 2019, 91 (12) : 1576 - 1588
  • [28] Enhanced degradation of para-nitrophenol during the UV/chlorine process with the addition of Fe(III): Performance, reaction mechanisms, and DBPs formation
    Mao Y.
    Wang T.
    Deng L.
    Tang Q.
    Luo W.
    Xu B.
    Tan C.
    Hu J.
    Separation and Purification Technology, 2024, 343
  • [29] Roles of reactive chlorine species in trimethoprim degradation in the UV/chlorine process: Kinetics and transformation pathways
    Wu, Zihao
    Fang, Jingyun
    Xiang, Yingying
    Shang, Chii
    Li, Xuchun
    Meng, Fangang
    Yang, Xin
    WATER RESEARCH, 2016, 104 : 272 - 282
  • [30] Removal of Microcystis aeruginosa by UV/chlorine process: Inactivation mechanism and microcystins degradation
    Sun, Julong
    Bu, Lingjun
    Deng, Lin
    Shi, Zhou
    Zhou, Shiqing
    CHEMICAL ENGINEERING JOURNAL, 2018, 349 : 408 - 415
12345