KANDUNGAN LOGAM BER AT D ALA MKER ANG DAR AH (ANADARA GR ANOSA ) DI PERAIRAN BAGAN SIAPIAPI PROVINSI RIAU

Abstract

Analysis of heavy metals content in blood cockle (Anadara granosa) fromBagansiapiapi coastal waters has been conducted. Samples were collected in Au-gust 2011 and heavy metals content analysis was carried out by using AAS PerkinElmer 3110 in Marine Chemistry Laboratory Faculty of Fisheries and MarineScience, University of Riau. The result shows that the mean heavy metals contentin the shells (2.72 and 22.20 μg/g) were higher than that in the soft tissues (1.32and 20.51 μg/g) for Pb and Cu respectively. Heavy metals content was increasedwith increasing size where smaller size (15-26 mm) contained 1.16 μg/g Pb and21.67μg/g Cu; medium size (27-38 mm) 1.39 μg/g Pb and 14.67μg/g Cu whilstlarge size (39-50 mm) contained 1.40μg/g Pb and 25.18μg/g Cu. Simple linearregression analysis indicated positive correlations between heavy metals content inthe soft tissues and shell with the size of the cockle (y = 1,0680 + 0,007x; r = 0,295and y = 0,073x + 0,338; r = 0,901 for Pb and y = -1,646 + 0,570x; r = 0,927 and y= 21,01 + 0,036x; r = 0,268 for Cu) respectively. In general, the calculated PTWIas established by FAO/WHO suggested that to avoid negative health effects, peopleshould consumed blood cockle from Bagansiapiapi coastal waters not to exceed5.30 kg/week (based on Pb concentration) and 47.78 kg/week (based on Cuconcentration). The results of the study also indicated that blood cockle can be usedas biomonitoring agent for heavy metal pollution.