Trace metal concentrations in suspended particles, sediments and clams (Ruditapes philippinarum) from Jiaozhou Bay of China

Abstract

Suspended particulate matter (SPM), sediments and clams were collected at three sites in Jiaozhou Bay to assess the magnitude of trace metal pollution in the area. Metal concentrations in SPM (Cu: 40.11-203; Zn: 118-447; Pb: 50.1-132; Cd: 0.55-4.39; Cr: 147.6-288; Mn: 762-1670 microg/g), sediments (Cu: 17.64-34.26; Zn: 80.79-110; Pb: 24.57-49.59; Cd: 0.099-0.324; Cr: 41.6-88.1; Mn: 343-520 microg/g) and bivalves (Cu: 6.41-19.76; Zn: 35.5-85.5; Pb: 0.31-1.01; Cd: 0.51-0.67; Mn: 27.45-67.6 microg/g) are comparable to those reported for other moderately polluted world environments. SPM showed a less clear pattern. Metal concentrations in sediments displayed a clear geographical trend with values increasing with proximity to major urban centers. The clams (on dry weight) showed a complex pattern due to the variability introduced by age-related factors. Cd showed an apparent reverse industrial trend with higher concentrations in clams collected at distant stations. Zn, Pb and Mn showed no clear geographical pattern, whereas Cu increased in the clams collected in the most industrialized area. In addition, the bioaccumulation factors (BAF) were calculated. The result indicated that the studied Ruditapes philippinarum in Jiaozhou Bay possessed different bioaccumulation capacities for Cd, Zn, Cu, Pb and Mn, and Cd, Zn had a relatively high assimilation of those metals from sediment particles. A significant relationship with clam age was observed for Zn (positive) and Cu (negative) suggesting different physiological requirements for both metals with age. Trace metal concentrations measured in the tissue of the investigated clam were in the range considered safe by the WHO for human use.

Concentrations of Cr, Cd, Cu, Zn and Fe in crab Charybdis longicollis and shrimp Penaeus semisulcatus from the Iskenderun Bay, Turkey

“…Decapod crustaceans do not regulate body concentrations of non-essential metals. Cd has no biological function or requirement and Cd concentration in marine organisms are generally low (Blackmore et al 1998;Kress et al 1998;Chou et al 2000;Storelli et al 2001;Li et al 2006;Sanchez-Chardi et al 2007). Zn and Fe were present in large quantities in the tissues both C. longicollis and P. semisulcatus.…”

Heavy Metal Concentration from Biologically Important Edible Species of Bivalves (Perna viridis and Modiolus metcalfei) from Vellar Estuary, South East Coast of India

“…This could also be due to fertilizer application in nearby area are transported to the estuaries by leaching and erosion as agriculture is also an important activity of the village folks besides fishing. According to Li [23], bivalves do not regulate Cd usually accumulate this element. Hence, green mussel might be able to regulate Cd in their body.…”

Metal pollution assessment of sediment and water in the Shur River

“…Because of the importance of sediments to the overall quality of aquatic systems, sediment analysis is often included in environmental assessment studies (Adekola and Eletta 2007;Li et al 2006;Jain et al 2005;Horsfall and Spiff 2002). To evaluate the heavy metal burden in the environment, it is usually not sufficient to measure only total concentrations, but also to establish the proportions of heavy metals present in various, soluble fractions, which are commonly quantified by a sequential extraction procedure (Chester and Hughes 1967;Tessier et al 1979, Forstner andWittmann 1981;Horowitz et al 1999;Stamatis et al 2006).…”