苯并噻唑(BTH),苯并三唑(BTRs),和苯并三唑紫外线吸收剂(BUV)由于其在环境中的持久性和对水生生物的不利影响而引起了广泛关注。然而,在热带海洋环境中进行的调查和研究仍然很少。在这项研究中,我们进行了BTH的首次分布调查和生态毒理学相关性,BTR,以及南海西部海水和沉积物中的BUV。BTH浓度升高,BTR,主要在珠江口(PRE)和WSCS西部地区观察到海水和悬浮颗粒物(SPM)中的BUV,归因于陆地径流和水动力过程。此外,这些化合物在海水-SPM界面的传输受污染物固有特性和温度变化的影响。空间上,BTH的浓度,BTR,随着从海岸到近海地区的距离增加,表层沉积物中的BUV呈递减趋势,反映了显著的人为影响。这些化合物在沉积物核心中的浓度分布显示出自下而上的增加趋势,总有机碳(TOC)被确定为控制其在WSCS沉积物核心内积累的主要决定因素。陆地径流输入和大气沉积是BTH发生的主要原因,BTR,和WSCS中的BUV。同时,该研究强调了与BTH相关的不可忽视的中等混合风险商,BTR,和沉积物中的BUV。
Benzothiazoles (BTHs), benzotriazoles (BTRs), and benzotriazole ultraviolet absorbers (BUVs) have garnered significant attention owing to their persistent nature in the environment and adverse impacts on aquatic organisms. However, there remains a dearth of investigations and studies conducted in tropical marine environments. In this study, we undertook the inaugural distributional survey and ecotoxicological relevance of BTHs, BTRs, and BUVs in
seawater and sediments of the western South China Sea (WSCS). Elevated concentrations of BTHs, BTRs, and BUVs in the
seawater and suspended particulate matter (SPM) were primarily observed in the Pearl River Estuary (PRE) and the western region of the WSCS, attributed to terrestrial runoff and hydrodynamic processes. Moreover, the transport of these compounds at the
seawater-SPM interface was influenced by both the intrinsic properties of the contaminants and temperature variations. Spatially, concentrations of BTHs, BTRs, and BUVs in surface sediments exhibited a diminishing trend with increasing distance from the coast to offshore areas, reflecting notable anthropogenic impacts. Concentration profiles of these compounds in sediment cores displayed a bottom-up increasing trend, with total organic carbon (TOC) identified as the primary determinant governing their accumulation within sediment cores in the WSCS. Terrestrial runoff inputs and atmospheric deposition as major contributors to the occurrence of BTHs, BTRs, and BUVs in the WSCS. Simultaneously, the study underscores the non-negligible moderate mixture risk quotient associated with BTHs, BTRs, and BUVs in the sediments.