State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Sci Technol. 2022 Dec 6;56(23):16759-16767. doi: 10.1021/acs.est.2c04143. Epub 2022 Nov 5.
Benzotriazole UV stabilizers (BZT-UVs), including 2-(3,5-di--amyl-2-hydroxyphenyl)benzotriazole (UV-328) that is currently under consideration for listing under the Stockholm Convention, are applied in many commodities and industrial products. However, limited information is available on the interannual variation of their environmental occurrence. In this study, an all-in-one strategy combining target, suspect, and nontarget screening analysis was established to comprehensively explore the temporal trends of BZT-UVs in mollusks collected from the Chinese Bohai Sea between 2010 and 2018. Significant residue levels of the target analytes were determined with a maximum total concentration of 6.4 × 10 ng/g dry weight. 2-(2-Hydroxy-3--butyl-5-methyl-phenyl)-5-chloro-benzotriazole (UV-326), 5-chloro-2-(3,5-di--butyl-2-hydroxyphenyl)benzotriazole (UV-327), and 2-(2-hydroxy-5-methylphenyl) benzotriazole (UV-P) were the predominant analogues, and UV-328 was the most frequently detected BZT-UV with a detection frequency (DF) of 87%. Whereas five biotransformation products and six impurity-like BZT-UVs were tentatively identified, their low DFs and semi-quantified concentrations suggest that the targeted analytes were the predominant BZT-UVs in the investigated area. A gradual decrease in the total concentrations of BZT-UVs was observed, accompanied by downward trends of the abundant compounds (e.g., UV-326 and UV-P). Consequently, the relative abundance of UV-327 increased because of its consistent environmental presence. These results suggest that continuous monitoring and risk assessment of BZT-UVs other than UV-328 are of importance in China.
苯并三唑紫外线稳定剂（BZT-UVs），包括目前正在考虑列入《斯德哥尔摩公约》的 2-(3,5-二--戊基-2-羟基苯基)苯并三唑（UV-328），被应用于许多商品和工业产品中。然而，关于其环境存在的年际变化的信息有限。在这项研究中，建立了一种一体化策略，结合目标、疑似和非目标筛选分析，全面探讨了 2010 年至 2018 年间在中国渤海采集的贝类中 BZT-UVs 的时间趋势。通过目标分析物的最大总浓度为 6.4×10ng/g 干重来确定显著的残留水平。2-(2-羟基-3--丁基-5-甲基苯基)-5-氯苯并三唑（UV-326）、5-氯-2-(3,5-二--丁基-2-羟基苯基)苯并三唑（UV-327）和 2-(2-羟基-5-甲基苯基)苯并三唑（UV-P）是主要的类似物，UV-328 是最常检测到的 BZT-UV，检测频率（DF）为 87%。虽然暂定鉴定了五个生物转化产物和六个类似杂质的 BZT-UVs，但它们的低 DF 和半定量浓度表明，在研究区域中，目标分析物是主要的 BZT-UVs。BZT-UVs 的总浓度呈逐渐下降趋势，丰富化合物（如 UV-326 和 UV-P）的趋势也呈下降趋势。因此，由于其持续的环境存在，UV-327 的相对丰度增加。这些结果表明，在中国，除 UV-328 外，对 BZT-UVs 的持续监测和风险评估很重要。
