Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY, 13699, USA.
Environmental Monitoring & Reporting Branch, Ontario Ministry of the Environment, Conservation and Parks, 125 Resources Road, Toronto, ON, M9P 3V6, Canada.
Environ Sci Pollut Res Int. 2024 Jun;31(26):38358-38366. doi: 10.1007/s11356-024-33788-8. Epub 2024 May 27.
Concentrations of short- and medium-chain chlorinated paraffins (SCCPs and MCCPs) were analyzed and investigated in surficial sediment collected in 2018 from ten different nearshore sites in Lake Ontario and the St. Lawrence River influenced by inputs from varying urban and historical land uses. Sites were grouped into two categories of tributary and lake according to their location. Results show that tributary sites had higher concentrations of total chlorinated paraffin (CP) than lake sites. Humber Bay, a lake site, had the highest total CP concentration (55,000 ng/g) followed by Humber River, a tributary site (50,000 ng/g). The lowest concentrations were found in eastern Lake Ontario and Lake St. Francis in the St. Lawrence River (540 ng/g). Higher concentrations of chlorinated paraffins (CPs) were found where runoff and wastewater inputs from urban areas, current industrial activities, and population were the greatest. Levels of MCCPs were higher than SCCPs at all sites but one, Lake St. Francis. Among the SCCPs, C and among the MCCPs C were the dominant chain length alkanes, with C being the highest among both groups. The SCCPs and MCCPs profiles suggest that they can be used to distinguish between sites impacted by local sources vs. sites impacted by short-/long-range transport of these chemicals.
2018 年，在安大略湖和圣劳伦斯河的 10 个不同近岸地点采集了表层沉积物，这些地点受到不同城市和历史土地利用的输入影响。根据位置，将这些地点分为支流和湖泊两类。结果表明，支流地点的总氯化石蜡（CP）浓度高于湖泊地点。安大略湖的 Humber Bay 是一个湖泊地点，其总 CP 浓度最高（55,000ng/g），其次是支流地点的 Humber 河（50,000ng/g）。在圣劳伦斯河的安大略湖东部和圣弗朗西斯湖发现的浓度最低（540ng/g）。在城市地区径流量和污水输入、当前工业活动和人口最多的地方，氯化石蜡（CPs）的浓度较高。在所有地点，除了圣弗朗西斯湖，短链氯化石蜡（MCCPs）的浓度都高于中链氯化石蜡（SCCPs）。在 SCCPs 中，C 是主要的链长烷烃，而在 MCCPs 中 C 是最高的。SCCPs 和 MCCPs 的分布表明，它们可用于区分受本地源影响的地点和受这些化学物质的短/长程传输影响的地点。
