CIESC Journal ›› 2023, Vol. 74 ›› Issue (4): 1587-1597.DOI: 10.11949/0438-1157.20221613

• Catalysis, kinetics and reactors • Previous Articles     Next Articles

Effective removal of 2,4,6-trichlorophenol by coupling photocatalysis with ion exchange adsorption

Chuanbao XIAO1(), Linyang LI1, Wufeng LIU1, Nianbing ZHONG1(), Quanhua XIE1, Dengjie ZHONG2, Haixing CHANG2   

  1. 1.Intelligent Fiber Sensing Technology of Chongqing Municipal Engineering Research Center of Institutions of Higher Education,Chongqing Key Laboratory of Modern Photoelectric Detection Technology and Instrument,Chongqing Key Laboratory of Fiber Optic Sensor and Photodetector,Chongqing University of Technology,Chongqing 400054,China
    2.College of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China
  • Received:2022-12-13 Revised:2023-04-07 Online:2023-06-02 Published:2023-04-05
  • Contact: Nianbing ZHONG

光催化与离子交换吸附耦合有效去除2,4,6-三氯苯酚

肖川宝1(), 李林洋1, 刘武锋1, 钟年丙1(), 解泉华1, 钟登杰2, 常海星2   

  1. 1.重庆理工大学,智能光纤感知技术重庆市高校工程研究中心,重庆市现代光电检测技术与仪器重点实验室,光纤传感与光电检测重庆市重点实验室,重庆 400054
    2.重庆理工大学化学化工学院,重庆 400054
  • 通讯作者: 钟年丙
  • 作者简介:肖川宝(1996—),男,硕士研究生, X_ChuanBao@163.com
  • 基金资助:
    国家自然科学基金面上项目(52176178);重庆市教委科学技术研究计划重大项目(KJZD-M202201101);重庆市自然科学基金创新发展联合基金重点项目(CSTB2022NSCQ-LZX0059);重庆市高校创新研究群体项目(CXQT21035);重庆市研究生创新项目(CYS22645);重庆理工大学研究生教育高质量发展项目(gzlcx2022022)

Abstract:

In order to promote the rapid degradation of 2,4,6-trichlorophenol (2,4,6-TCP) and rapid removal of chloride ions in wastewater, a coupling system of photocatalysis and ion exchange adsorption was constructed in this study. The system consists of ruthenium (Ru), molybdenum (Mo) bimetallic doped monoclinic BiVO4 coated photocatalytic quartz optical hollow fibers and ZnAL-LDH-NO3 coated quartz optical fiber cloth. It is found that RuO2/Mo-BiVO4 photocatalyst has a porous and irregular polyhedron structure and small catalyst particle size, which helps to increase the specific surface area of the photocatalyst, promote photoelectric conversion and electron transfer, and Ru and Mo doping can effectively suppress photogenerated electron hole recombination, promoting the generation of oxidation active species (·OH and ·O2-), and improving the photocatalytic activity of BiVO4. RuO2/Mo-BiVO4 coated photocatalysis hollow fibers has a removal rate of 62.4% for 200 ml, 80 mg/L 2,4,6-TCP in 6 h, 1.56 times that of BiVO4 coated photocatalysis hollow fibers. At pH 6.2 and temperature of 35℃, the removal rate of 2,4,6-TCP in 6 h of RuO2/Mo-BiVO4 coated photocatalysis hollow fibers alone has increased to 74.2%, COD removal rate has reached 43.1%, and dechlorination rate has reached 40.3% (the concentration of chloride ions in the liquid phase has reached 443.2 μmol/L). The removal rates of 2,4,6-TCP, COD and chloride ions in the coupling system of photocatalysis and ion exchange adsorption reached 91.1%, 53.8% and 98.1% respectively in 6 h.

Key words: 2,4,6-trichlorophenol, photocatalyst, quartz optical hollow fiber, chloride ion adsorbent, quartz optical fiber cloth, coupling

摘要:

为了实现2, 4, 6-三氯苯酚(2, 4, 6-TCP)废水快速降解和氯离子去除,构建了光催化与离子交换吸附耦合系统。该系统由钌(Ru)、钼(Mo)双金属掺杂单晶体BiVO4涂覆光催化石英空心光纤束和ZnAl-LDH-NO3涂覆石英光纤布构成。研究发现:RuO2/Mo-BiVO4光催化剂具有粒径小且呈多孔不规则多面体结构,有助于提高光催化剂比表面积,促进光电转换及电子转移,同时Ru和Mo掺杂可有效地抑制光生电子-空穴复合,促进氧化活性物质(·OH和·O2-)产生,提高BiVO4光催化活性;RuO2/Mo-BiVO4涂覆光催化空心光纤束6 h对200 ml、80 mg/L 2, 4, 6-TCP去除率达到62.4%,是BiVO4涂覆光催化空心光纤束的1.56倍。在pH为6.2、温度为35℃时,单独RuO2/Mo-BiVO4涂覆光催化空心光纤束6 h对2, 4, 6-TCP去除率提升至74.2%、COD去除率达到43.1%、脱氯率达到40.3%(液相氯离子浓度达到443.2 μmol/L)。光催化与离子交换吸附耦合系统6 h对2, 4, 6-TCP、COD和氯离子去除率分别达到91.1%、53.8%和98.1%。

关键词: 2, 4, 6-三氯苯酚, 光催化剂, 石英空心光纤, 氯离子吸附剂, 石英光纤布, 耦合

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