Investigation of heavy metals in sediments and Manila clams from Jiaozhou Bay, China.pdf

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Investigation of heavy metals in sediments and Manila clams from Jiaozhou Bay, China.pdf

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Investigation of heavy metals in sediments and Manila clams from Jiaozhou Bay, China

Environ Monit Assess (2010) 170:631–643 DOI 10.1007/s10661-009-1262-5 Investigation of heavy metals in sediments and Manila clams Ruditapes philippinarum from Jiaozhou Bay, China Xiaoyu Wang · Yi Zhou · Hongsheng Yang · Qing Wang · Shilin Liu Received: 6 September 2009 / Accepted: 3 December 2009 / Published online: 23 December 2009 ? Springer Science+Business Media B.V. 2009 Abstract Manila clams (Ruditapes philippina- rum) and sediments were collected bimonthly during 2007 at five locations in Jiaozhou Bay near Qingdao, China, to determine heavy metal concentrations and to assess the validation of R. philippinarum as a metal biomonitor. Concentra- tions of heavy metals in clam soft tissues ranged between 0.75 and 3.31, 0.89 and 15.20, 5.70 and 26.03, 52.12 and 110.33, 10.30 and 72.34, 9.64 and 28.60, and 3.15 and 52.75 μg g?1 dry weight for Cd, Pb, Cu, Zn, Mn, Cr, and Ni, respectively. Most of the highest values occurred at the northeast Electronic supplementary material The online version of this article (doi:10.1007/s10661-009-1262-5) contains supplementary material, which is available to authorized users. X. Wang · Y. Zhou · H. Yang (B) · Q. Wang · S. Liu Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, Peoples’ Republic of China e-mail: hshyang@, hshyang@126.com X. Wang The Engineering Research Center of Seawater Utilization Technology, Ministry of Education, Hebei University of Technology, Tianjin, 300130, China X. Wang · Q. Wang Graduate School, Chinese Academy of Sciences, Beijing, 100049, China bay and the lowest values occurred at the western part. Regarding seasonal variation, relatively high tissue metal concentrations were observed during October or December. A similar pattern was also found in habitat sediments. There was a strong correlation between the concentrations of Cd, Pb, Zn, Mn, Cr, and Ni in soft tissues and surrounding sediments. It is indicated that R. phili