Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; School of Environmental & Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Laboratory of Petroleum Resources Exploration and Evaluation, Gansu Province, Lanzhou 730000, China; Key Laboratory of Strategic Mineral Resources of the Upper Yellow River, Ministry of Natural Resources, Lanzhou 730000, China.
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; School of Environmental & Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; Laboratory of Petroleum Resources Exploration and Evaluation, Gansu Province, Lanzhou 730000, China.
Mar Pollut Bull. 2024 Nov;208:116962. doi: 10.1016/j.marpolbul.2024.116962. Epub 2024 Sep 16.
Knowledge about sediment levels and sources of persistent organic pollutants (POPs) in Lanzhou section Yellow River remains limited. Organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) levels in 12 sediment samples from this region were measured by GC/MS. OCPs concentrations ranged from 85.6 to 202 ng/g, while PCBs levels varied between 3.08 and 32.3 ng/g. Our findings demonstrated a significant correlation between these pollutants and total organic matter (TOC), highlighting TOC's role in pollutants distribution. Notably, OCPs and PCBs levels were higher in the eastern section, following the water flow direction. The primary OCPs components were hexachlorocyclohexane (HCH) and dichlorodiphenyltrichloroethane (DDT), whereas PCBs were dominated by perchlorinated compound. Source identification indicated that OCPs primarily originated from historical residues and recent applications, while industrial activities as significant PCBs sources. Sediment quality guidelines and health risk assessments indicated negligible environmental risk. This study providing valuable insights on sediment pollution control and management strategies.
有关黄河兰州段沉积物水平和持久性有机污染物（POPs）来源的知识仍然有限。本研究采用 GC/MS 方法测定了该地区 12 个沉积物样品中的有机氯农药（OCPs）和多氯联苯（PCBs）水平。OCPs 浓度范围为 85.6-202ng/g，而 PCBs 浓度在 3.08-32.3ng/g 之间。研究结果表明，这些污染物与总有机碳（TOC）之间存在显著相关性，突出了 TOC 在污染物分布中的作用。值得注意的是，OCPs 和 PCBs 水平在东部段较高，与水流方向一致。主要的 OCPs 成分是六氯环己烷（HCH）和滴滴涕（DDT），而 PCBs 则以全氯化合物为主。源识别表明，OCPs 主要来源于历史残留和近期应用，而工业活动是 PCBs 的重要来源。沉积物质量基准和健康风险评估表明，环境风险可忽略不计。本研究为沉积物污染控制和管理策略提供了有价值的见解。
