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论文类型：期刊论文

发表时间：2015-10-01

发表刊物：ENVIRONMENTAL POLLUTION

收录刊物：SCIE、EI、PubMed、Scopus

卷号：205

页面范围：1-7

ISSN号：0269-7491

关键字：Paddy field; PBDEs; Fugacity fraction; Exchange flux; Net input

摘要：Rice and the distinctive cultivation practices employed in rice growth can significantly influence the environmental fate of polybrominated diphenyl ethers (PBDEs) in a paddy field. We studied variations in PBDE concentrations in multiple compartments of a paddy field in the suburban area of Guangzhou, South China, including air, soil, water, and rice tissues. The input/output fluxes of air surface and air foliage exchange, atmospheric deposition and water input during different rice growth stages were measured simultaneously. Air foliage and air water diffusion exchanges were the key processes controlling inputs and outputs of PBDEs in paddy fields, respectively, whereas atmospheric deposition dominated inputs of higher brominated PBDEs. The high input of PBDEs via air foliage exchange suggested that vegetation can significantly increase the air-to-field transport of PBDEs in ecosystems. The annual input of PBDEs in all paddy fields in Guangdong Province was estimated to be 22.1 kg. (C) 2015 Elsevier Ltd. All rights reserved.