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ZnIn2S4光催化降解水中痕量药物卡马西平的特性

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谭娜, 卜龙利, 高波, 刘嘉栋, 冯奇奇, 孟海龙, 何克博. ZnIn2S4光催化降解水中痕量药物卡马西平的特性[J]. 环境工程学报, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
引用本文: 谭娜, 卜龙利, 高波, 刘嘉栋, 冯奇奇, 孟海龙, 何克博. ZnIn2S4光催化降解水中痕量药物卡马西平的特性[J]. 环境工程学报, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
shu
TAN Na, BO Longli, GAO Bo, LIU Jiadong, FENG Qiqi, MENG Hailong, HE Kebo. Characteristics of photocatalytic degradation by ZnIn2S4 for trace pharmaceutical carbamazepine in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
Citation: TAN Na, BO Longli, GAO Bo, LIU Jiadong, FENG Qiqi, MENG Hailong, HE Kebo. Characteristics of photocatalytic degradation by ZnIn2S4 for trace pharmaceutical carbamazepine in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
shu

ZnIn2S4光催化降解水中痕量药物卡马西平的特性

  • 1.

    西安建筑科技大学环境与市政工程学院, 西安, 710055

  • 基金项目:

    西安建筑科技大学创新团队项目

  • 中图分类号: X703.1

Characteristics of photocatalytic degradation by ZnIn2S4 for trace pharmaceutical carbamazepine in aqueous solution

  • 1.

    School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

  • Fund Project:

  • 摘要: 采用水热合成法制备光催化剂ZnIn2S4，考察其光催化降解水中痕量医药类物质卡马西平的特性。研究表明，卡马西平初始浓度100 μg·L-1、溶液pH 5~9、ZnIn2S4投加量50 mg·L-1与碘镓灯（350~450 nm）光照反应3 h后，卡马西平的去除率为90%。动力学分析表明，卡马西平的光催化降解符合一级反应动力学，添加催化剂时的反应速率常数是不加催化剂的2.85倍，催化剂明显提高了降解反应速率。催化剂循环使用2个周期后，卡马西平的去除率由90%降至70%并保持稳定，表明催化剂结构趋稳后仍具有较高的催化活性。羟基自由基（·OH）实验证实了卡马西平降解过程中·OH为主要活性物种，但卡马西平的矿化率却只有3%，由于反应后的溶液呈酸性，因此推测光催化过程中卡马西平与·OH作用后大都转化为酸性中间产物而未被彻底氧化。
    Abstract: Visible-light-driven catalyst ZnIn2S4 was synthesized via a hydrothermal method, and its photocatalytic activity for trace pharmaceutical carbamazepine (CBZ) in aqueous solution was investigated subsequently through a batch reactor. The research showed that the removal efficacy of CBZ reached 90% under irradiation by an iodine-gallium lamp for 3 h at a wavelength of 350 to 450 nm. Other reaction conditions were an initial CBZ concentration of 100 μg·L-1, solution pH of 5 to 9, and catalyst dosage of 50 mg·L-1. Reaction kinetics analysis indicated that the photocatalytic degradation of CBZ was in accord with first-order kinetics, and the reaction rate constant with the catalyst was 2.85 times higher than that without the catalyst. Therefore, ZnIn2S4 improved the reaction rate significantly. The stability of the catalyst was investigated and the results showed that the removal rate of CBZ decreased from 90% to 70% after the catalyst was recycled two times, and then the removal of CBZ remained constant and the catalyst displayed high catalytic activity and a stable structure. Trapping experiments indicated that free hydroxyl radical (·OH) plays an important role in CBZ decomposition; however, mineralization of CBZ was only 3%. After illumination, the reaction solution was acidic, which implied that most of the CBZ degraded into acid intermediates instead of CO2 and H2O while reacting with ·OH.
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  • 收稿日期:  2015-11-23
  • 刊出日期:  2017-01-05
谭娜, 卜龙利, 高波, 刘嘉栋, 冯奇奇, 孟海龙, 何克博. ZnIn2S4光催化降解水中痕量药物卡马西平的特性[J]. 环境工程学报, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
引用本文: 谭娜, 卜龙利, 高波, 刘嘉栋, 冯奇奇, 孟海龙, 何克博. ZnIn2S4光催化降解水中痕量药物卡马西平的特性[J]. 环境工程学报, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
shu
TAN Na, BO Longli, GAO Bo, LIU Jiadong, FENG Qiqi, MENG Hailong, HE Kebo. Characteristics of photocatalytic degradation by ZnIn2S4 for trace pharmaceutical carbamazepine in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
Citation: TAN Na, BO Longli, GAO Bo, LIU Jiadong, FENG Qiqi, MENG Hailong, HE Kebo. Characteristics of photocatalytic degradation by ZnIn2S4 for trace pharmaceutical carbamazepine in aqueous solution[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 223-229. doi: 10.12030/j.cjee.201508197
shu

ZnIn2S4光催化降解水中痕量药物卡马西平的特性

  • 1. 西安建筑科技大学环境与市政工程学院, 西安, 710055
  • 收稿日期:  2015-11-23
基金项目:

西安建筑科技大学创新团队项目

摘要: 采用水热合成法制备光催化剂ZnIn2S4，考察其光催化降解水中痕量医药类物质卡马西平的特性。研究表明，卡马西平初始浓度100 μg·L-1、溶液pH 5~9、ZnIn2S4投加量50 mg·L-1与碘镓灯（350~450 nm）光照反应3 h后，卡马西平的去除率为90%。动力学分析表明，卡马西平的光催化降解符合一级反应动力学，添加催化剂时的反应速率常数是不加催化剂的2.85倍，催化剂明显提高了降解反应速率。催化剂循环使用2个周期后，卡马西平的去除率由90%降至70%并保持稳定，表明催化剂结构趋稳后仍具有较高的催化活性。羟基自由基（·OH）实验证实了卡马西平降解过程中·OH为主要活性物种，但卡马西平的矿化率却只有3%，由于反应后的溶液呈酸性，因此推测光催化过程中卡马西平与·OH作用后大都转化为酸性中间产物而未被彻底氧化。

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