Talk@EEH第一讲——全球水生被动采样计划：水环境中持久性有机污染物全球监测

Rainer Lohmann，环境科学博士，罗德岛大学海洋研究生院教授，罗德岛大学超级基金研究计划中心主任。研究方向是PFAS的来源、运输、暴露和影响，尤其是借助被动采样器，对环境中人为污染物进行检测，并探究其传播和环境归趋。已在Environmental Science and Technology, Science of the Total Environment, Environmental Pollution等国际期刊发表学术论文160余篇，H指数50。

Organic contaminants, particularly persistent organic pollutants (POPs), adversely affect water quality and aquatic food webs across the globe. So far, there was no globally consistent information available on concentrations of dissolved POPs in the waters of the world. AQUA-GAPS was hence initiated to establish a global monitoring program for various dissolved organic pollutants using passive samplers.

During the initial AQUA-GAPS/ Monet deployments, both low-density polyethylene (LDPE) and silicone SPSS samplers were co-deployed at all sites. For target polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs), there was generally a higher incidence of detection in the SPSS than in LDPE. Focusing on SPSS samplers only, results were available for 46 sampling sites, with 10 locations having 2 to 4 sampler deployments between late 2016 and mid-2019. Contrasting trends were observed for PCBs versus OCPS. Concentrations of PCBs were, by and large, reflective of past usage, implying limited transport away from source regions. For several groups of OCPs, including hexachlorocyclohexanes (HCHs), dieldrin, and chlordane, evidence of cold condensation with elevated concentrations in the Arctic region was observed. The presence of breakdown products of endosulfan and DDT seemed to mostly indicate recent usage in the mid-latitudes. These preliminary results from AQUA-GAPS show the promise of using passive samplers to discern trends of legacy and emerging organic contaminants on a global scale.