Biomonitoring of heavy metals using Mytilus galloprovincialis in Safi coastal waters, Morocco

Abstract

Heavy metal concentrations of mercury, cadmium, lead, zinc, cooper, nickel, manganese, and chromium in Mytilus galloprovincialis were investigated to provide information on pollution of Safi coastal area, since these metals have the highest toxic potential. The concentration of Hg and Pb was determined by AFS and ICP-MS methods, respectively, whilst the remaining metals (Cd, Cr, Cu, Mn, Zn, and Ni) were quantified by AAS. High lead, cadmium, chromium, and mercury levels were registered in tissue samples collected from two stations near the Jorf Lihoudi and Safi city, while elevated concentration of manganese and zinc (14.70-25.30 mg kg 21 and 570-650 mg kg 21 dry wt, respectively) were found in mussel specimens from Cap Cantin. The high levels of nickel found respectively in the areas near the industrial area being of concern in terms of environmental health need frequent monitoring. The metal concentrations recorded at the clean stations may be considered as useful background levels to which to refer for comparison within the Atlantic coast. M. galloprovincialis are suitable biomonitors to investigate the contamination levels of heavy metals pollution face a different human activity in this coastal area of the Atlantic coast. # 2007 Wiley Periodicals, Inc. Environ Toxicol 22: 525-531, 2007.

Evaluation of Metal Concentrations in Mussel M. galloprovincialis in the Dardanelles Strait, Turkey in Regard of Safe Human Consumption

“…After the highest mean values occurred in 2008, a decreasing trend was observed. The Cr concentrations are similar to those of previous studies (Cevik et al 2008;Ergul et al 2007;Joksimovic et al 2011;Sunlu 2006;Topcuoglu et al 2004) while they are lower than those found on the Safi coast (Maanan 2007). In general, the Cr values were not uniform among the sampling sites.…”

“…There were also statistically significant differences between Liman-Eceabat and Liman-Dardanos. While the findings in other reported studies were lower than the present study (Cardellicchio et al 2008;Ergul et al 2007;Sunlu 2006;Unlu et al 2008), others were higher (Cevik et al 2008;Maanan 2007). From the point of view of human health, for Pb the average weekly intake for adults (of 60 kg) was estimated to be 1.5 mg, so the PTWI Pb was 0.025 mg/kg body weight/week (FAO/WHO 2004) .…”

“…Obtained results are in good agreement with findings reported previously (Ergul et al 2007;Joksimovic et al 2011;Romeo et al 2005;Sunlu 2006;Kavun et al 2002;Topcuoglu 2000;Topcuoglu et al 2004), while they are lower than those reported by Unlu et al (2008) and Cardellicchio et al (2008). On the other hand, heavy metal concentrations reported in some studies were higher than those found in this study (Cevik et al 2008;Maanan 2007). A joint FAO/WHO/IAEA (International Atomic Energy Agency) report indicated that an upper limit for the safe range of population mean exposures of Cu for adults was of 0.2 mg/kg body weight/day (WHO 1996).…”

“…Comparisons with previous studies revealed Cd concentrations similar to those found on some parts of the coast of Turkey and in other countries (Ergul et al 2007;Romeo et al 2005;Sunlu 2006). Additionally, they are significantly lower than those found on the coast of Turkey and Morocco (Cevik et al 2008;Maanan 2007;Kavun et al 2002;Sunlu 2006;Topcuoglu 2000;Topcuoglu et al 2004). For Cd the average weekly intake for adults (60 kg body weight) was estimated to be 0.42 mg, so the PTWI Cd was 0.007 mg/kg body weight/week (WHO/FAO 1999).…”

CONTENTS OF HEAVY METALS Hg, Cd, Pb, Cr IN BIVALVES FROM ESTUARIES IN CENTRAL VIETNAM

“…Việc nhiễm bẩn kim loại nặng trong các loài sinh vật tại cửa sông, ven biển đã phát hiện tại nhiều khu vực trên thế giới [5]. Trong đó, các loài động vật hai mảnh vỏ (ĐVHMV) được biết đến bởi khả năng hấp thụ và tích lũy kim loại nặng cao hơn gấp nhiều lần so với môi trường chúng sinh sống [5][6][7]. Nhờ có khả năng tích lũy cao chất ô nhiễm và có mối tương quan cao với hàm lượng kim loại nặng trong có trong môi trường, một số loài được sử dụng để làm sinh vật giám sát hiệu quả sự di chuyển và phát tán kim loại nặng theo các dòng dinh dưỡng và chuỗi thức ăn [5][6][7][8].…”