加拿大魁北克省圣劳伦斯河中紫外线吸收剂和工业抗氧化剂的分布和归宿,Environmental Science & Technology

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加拿大魁北克省圣劳伦斯河中紫外线吸收剂和工业抗氧化剂的分布和归宿
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2022-04-08 , DOI: 10.1021/acs.est.1c07932
Abigaëlle Dalpé Castilloux ₁ , Magali Houde ₂ , Andrée Gendron ₂ , Amila De Silva ₃ , Youssouf Djibril Soubaneh ₄ , Zhe Lu ₁

Affiliation

紫外线吸收剂 (UVA) 和工业抗氧化剂 (IA) 是新出现的污染物。在这项研究中，我们调查了这些污染物在圣劳伦斯河 (St. Lawrence River)的地表水、悬浮颗粒物 (SPM)、沉积物和湖鲟 ( Acipenser fulvescens ) 和北梭子鱼 ( Esox lucius ) 的各种组织中的分布和分配 ( SLR)，魁北克，加拿大。结果表明 2,6- di--丁基-1,4-苯醌 (BHTQ) 是地表水溶解相中的主要污染物，三个采样点的中值浓度分别为 43、15 和 123 ng/L。与上游相比，在一个主要城市下游收集的地表水显示出更高水平的各种 UVA、BHTQ 和二苯胺，这表明城市活动对 SLR 中这些新兴污染物的污染产生了影响。与沉积物相比，SPM 对大多数目标污染物的吸附能力更强。在湖鲟和北梭子鱼中发现了不同的污染情况，这意味着鱼类中 UVA 和 IA 的积累取决于它们的摄食行为。经常检测到的污染物的基于现场的组织特异性生物蓄积因子 (BAF) (log BAF 1.5–4.

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Distribution and Fate of Ultraviolet Absorbents and Industrial Antioxidants in the St. Lawrence River, Quebec, Canada

Ultraviolet absorbents (UVAs) and industrial antioxidants (IAs) are contaminants of emerging concern. In this study, we investigated the distribution and partitioning of these contaminants in surface water, suspended particulate matter (SPM), sediment, and various tissues of lake sturgeon (Acipenser fulvescens) and northern pike (Esox lucius) from the St. Lawrence River (SLR), Quebec, Canada. Results indicated that 2,6-di-tert-butyl-1,4-benzoquinone (BHTQ) was the dominant contaminant in the dissolved phase of the surface water, with median concentrations of 43, 15, and 123 ng/L for three sampling sites, respectively. Surface water collected downstream of a major city showed higher levels of various UVAs, BHTQ, and diphenylamine compared to the upstream, suggesting the influence of the urban activities on the contamination of these emerging contaminants in the SLR. SPM showed greater sorption capacities of most target contaminants compared to those of the sediment. Different contamination profiles were found in lake sturgeon and northern pike, implying that the accumulation of UVAs and IAs in fish depends on their feeding behavior. The field-based tissue-specific bioaccumulation factors (BAFs) for frequently detected contaminants (log BAF 1.5–4.2) were generally comparable to or lower than the Estimation Program Interface modeling results (1.4–5.0), indicating that some of these contaminants may be less bioaccumulative than previously expected.

更新日期：2022-04-08

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