PERSISTENT ORGANIC POLLUTANTS
; POLYCYCLIC AROMATIC-HYDROCARBONS
; SHALLOW EUTROPHIC LAKE
; POLYCHLORINATED-BIPHENYLS PCBS
; LONG-TERM VARIATIONS
; PEARL RIVER DELTA
; SEDIMENTARY RECORDS
; FATE
; IMPACTS
; EMISSIONS
WOS学科分类:
Environmental Sciences
WOS研究方向:
Environmental Sciences & Ecology
英文摘要:
Climate change and anthropogenic activities are expected to impact the environmental behaviors and fates of persistent organic pollutants (POPs), however, quantitative studies on these combined factors are scarce. In this study, dichlorodiphenyltrichloroethane (DDTs), polycyclic aromatic hydrocarbons (PAHs), and polychlorinated biphenyls (PCBs) were used as examples to identify how and when those factors may be related to the deposition of POPs in the sediment of Lake Chaohu, China, using generalized additive models (GAMs). Three historical trends of DDT, PAH, and PCB deposition were delineated in a dated sediment core encompassing similar to 100 years of historical record: a steady state or gradually increasing stage, a rapidly increasing stage, and a declining stage. The GAM results showed that aquatic total phosphorus (TP) concentrations and regional GDP (anthropogenic factors) were dominant contributors to POP accumulation rates in the lake sediment. The fitted relationships between air temperature and sedimentary DDT and PAH concentrations were linear and negative, while a positive linear relationship was found for PCBs, suggesting that Lake Chaohu may have become a net source for DDTs and PAHs, and a sink for PCBs, under a progressively warming climate. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 2.Univ Kentucky, Dept Earth & Environm Sci, Lexington, KY 40506 USA
Recommended Citation:
Zhang, Hanxiao,Huo, Shouliang,Yeager, Kevin M.,et al. Apparent relationships between anthropogenic factors and climate change indicators and POPs deposition in a lacustrine system[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2019-01-01,83:174-182