袁雨瑾,肖习羽,李青松,李玉瑛,吴俊文,戴惠林

• 1:厦门理工学院水资源环境研究所
• 2:汕头大学海洋灾害预警与防护广东省重点实验室
• 3:五邑大学生物科技与大健康学院

摘要(Abstract)：

采用VUV/UV/NaClO及UV/NaClO工艺去除百里香酚(Tml)，对比考察pH、CO_3~(2-)、NO_3~-和腐殖酸(HA)等因素对Tml去除的影响，鉴定识别Tml的降解产物并推测了降解途径，探究VUV/UV/NaClO工艺中反应溶液的急性毒性变化，通过反应溶液组分毒性鉴定评估结合ECOSAR软件模拟识别了毒性较大的产物。结果表明，UV/NaClO和VUV/UV/NaClO工艺中Tml的去除拟一级反应动力学常数k_(obs)均随着pH的增大先减少后增加，且均在pH为7时达到最小，分别为0.183 6 min~(-1)和0.554 7 min~(-1);CO_3~(2-)的存在有利于Tml的去除，在VUV/UV/NaClO工艺中，低浓度NO_3~-对Tml的去除有轻微抑制作用，高浓度则反之；而在UV/NaClO工艺中，NO_3~-的存在有利于Tml的去除；HA对Tml的去除有抑制作用。相同条件下不同水质因素对VUV/UV/NaClO工艺的促进或抑制更为显著，约为UV/NaClO工艺的1.05～3.57倍。VUV/UV/NaClO工艺中Tml主要发生了自由基的取代、加成和氧化分解反应，生成了氯代、醌和醛类中间产物。VUV/UV/NaClO处理后的溶液毒性呈先上升后下降再上升的趋势，生成的丙酸乙烯基酯和戊醛类等小分子有机物导致了反应后期反应溶液急性毒性增加。

关键词(KeyWords)： VUV/UV/NaClO;UV/NaClO;百里香酚(Tml);水质;自由基

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51878582,42076038);; 福建省科技计划引导性资助(2021Y0041)

作者(Author): 袁雨瑾,肖习羽,李青松,李玉瑛,吴俊文,戴惠林

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