Aquatic environment

Distribution patterns of octylphenol and nonylphenol in the aquatic system atMai Po Marshes Nature Reserve, a subtropical estuarine wetlandin Hong Kong

LI Xiang-li , LUAN Tian-gang , LIANG Yan , WONG Ming-hung , LAN Chong-yu


Received July 27, 2006,Revised December 18, 2006, Accepted , Available online

Volume 19,2007,Pages 657-622

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Spatial and temporal distribution of octylphenol (OP) and nonylphenol (NP) in Mai Po Marshes, a subtropical estuarine wetland in Hong Kong, were investigated. Surface water samples were collected every month from 11 sites during the period of September- December 2004. Concentrations of OP and NP ranged from 11.3 to 348 ng/L and from 29 to 2591 ng/L, respectively. The high levels of NP and OP were found in November and December than in September and October. The levels of OP and NP have no significant spatial di erences except September. Total organic matter in the sediments appeared to be an important factor in controlling the fate of these compounds in the aquatic environment.

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