| 珠江广州段水体中紫外吸收剂的污染特征及生态风险 |
| 摘要点击 1002 全文点击 147 投稿时间：2024-03-07 修订日期：2024-04-20 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 珠江 水环境 紫外吸收剂（UVAs） 分布特征 生态风险 |
| 英文关键词 Pearl River aquatic environment ultraviolet absorbents （UVAs） distribution characteristics ecological risk |
|
| 中文摘要 |
| 紫外吸收剂（UVAs）是个人护理产品和工业产品中常见的一类添加剂. 因其伪持久性、生物累积性和毒性,UVAs的环境污染和风险已引起人们的广泛关注,然而目前对城市水环境中UVAs污染特征和生态风险的了解仍然较少. 为探究水环境中UVAs的赋存、组成和空间分布特征,分析了珠江广州段40个水样（包括水相和悬浮颗粒相）中常见UVAs的浓度,并利用风险商评估其潜在水生态风险. 结果表明,珠江广州段水相和颗粒相中UVAs被广泛检出,两相中总浓度(∑8UVA,范围及平均值±标准差,ng·L-1)分别为6.52~85.8（2.80 ± 6.34）和5.69~461（6.57 ± 34.1）. UVAs在水相中的占比范围为16%~99%,疏水性强的化合物更易于分配在颗粒相. 珠江广州段下游水体中UVAs的浓度高于上游,娱乐场所、工业区和污水处理厂附近水体中UVAs检出浓度较高. 个人护理品添加剂2-氰基-3,3-二苯基丙烯酸-2-乙基己酯（OCR）在水相和颗粒相中均是最主要的UVA,检出浓度分别占总浓度的50%和60%. 风险商的结果显示珠江广州段水体中目标UVAs的水生态风险处于低到中等水平,亟需关注其长期暴露风险. |
| 英文摘要 |
| Ultraviolet absorbents （UVAs） are common additives in personal care and industrial products. Due to their pseudo-persistence, bioaccumulation, and toxicity, environmental pollution and the risks associated with UVAs have raised widespread concern. However, current understanding of the pollution characteristics and ecological risks of UVAs in urban aquatic environments is still limited. To investigate the occurrence, composition, and spatial distribution characteristics of UVAs in the aquatic environment, eight UVAs in 40 paired water and suspended particulate matter （SPM） samples in the Guangzhou reach of the Pearl River were analyzed, and their potential aquatic ecological risks were further assessed using risk quotients. The results showed that UVAs were widely detected in the aqueous and SPM phases of the Guangzhou reach of the Pearl River, with total concentrations （∑8UVA, range and mean ± standard deviation，ng·L-1) of 6.52-85.8 （2.80 ± 6.34） and 5.69-461 （6.57 ± 34.1）, respectively. The concentrations of individual UVAs in the aqueous phase accounted for 16% to 99% of the sum concentrations in the aqueous and SPM phases. Specifically, two UVAs （2-ethylhexyl 4-（dimethylamino）benzoate （ODPABA） and 2-（2-hydroxy-5-methylphenyl）benzotriazole （UV-P）） were almost exclusively （97% and 99% on average, respectively） distributed in the aqueous phase, one UVA （2-（2H-benzotriazol-2-yl）-4-（1,1,3,3-tetramethylbutyl）phenol （UV-329）） was mostly （84% on average） distributed in the SPM, and the remaining UVAs were similarly distributed to the aqueous and SPM phases, with concentrations in the aqueous phase accounting for 42%-74% of the sum concentrations in both phases. Concentrations of UVAs in the downstream were generally higher than those in the upstream. Compared with that in other regions, the pollution of UVAs in the waterbodies from the Guangzhou reach of the Pearl River was at a moderate to high level. UVAs were detected at higher concentrations in waterbodies near recreational sites, industrial areas, and wastewater treatment plants. The personal care additive 2-cyano-3,3-diphenyl acrylic acid-2-ethylhexyl ester （OCR） was the most dominant component in the aqueous and SPM phases, with detection frequencies of 98% and 100%, respectively, and its concentrations accounting for 50% and 60% of the sum concentrations in both phases, respectively. The risk quotients of individual UVAs in the aqueous phase from the Guangzhou reach of the Pearl River ranged from <0.1 to 1.08, indicating low to moderate risk. Three UVAs, i.e., ODPABA, OCR, and 2-（2H-benzotriazol-2-yl）-4,6-di-tert-pentylphenol （UV-328）, were the potential chemicals at risk. Moreover, it is urgent to pay attention to their long-term risk to aquatic organisms. |
|
|
|
