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Title: Heavy Metals and Polycyclic Aromatic Hydrocarbons (PAHs) Concentration in Mud Crab (Scylla Serrata) from UMT Mangrove, Terengganu, Malaysia
Authors: Ong M.C.; Tan Y.F.; Khoo X.Y. ; Yong J.C.
Aff: School of Marine and Environmental Sciences, University Malaysia Terengganu, 21030 Kuala Terengganu, Malaysia
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Keywords: Heavy Metals;Scylla serrata;Polycyclic Aromatic Hydrocarbons;Mangroves;Malaysia;Feeding Habits;Weekly Intakes;Gas Chromatography
Abstract:A study was carried out to determine the bioaccumulation of heavy metals (Cu, Zn, Cd and Pb) in different body parts (muscle, gills, stomach and carapace) and Polycyclic Aromatic Hydrocarbons (PAHs) in muscle of mud crabs (Scylla serrata) collected from mangrove area of University Malaysia Terengganu. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to determine the concentration of heavy metals accumulation in mud crabs. This study revealed that Cu and Zn content in muscle part of mud crab were also higher than the maximum permitted level which is only 100 g/g and 150 g/g, respectively. Besides, the concentration of Cu, Zn and Cd were increasing with the increase in length of mud crabs while decrease for Pb. This might due to the different in feeding habits and ecological needs metabolisms of young and adult mud crab. The concentration of Cu, Zn and Pb were exceed permissible limit that has set by FAO/WHO while Cd was below the permissible limit. The concentration of Zn, Cd and Cu were above the Provisional Tolerable Weekly Intake (PTWI) value that set by FAO/WHO while Pb was below the value. Besides, the concentration of PAHs accumulated in muscle was detected using Gas Chromatography Mass Spectrometry (GC-MS). PAHs compounds detected were Dibenzo (a,h) Anthracene, Benzo (a) Pyrene, Benzo (k) Fluoranthene, Fluoranthene, Chrysene, Phenanthrene, Acenaphylene, Ideno (1,2,3-cd) Pyrene, Benzo (g,h,i) Perylene and Benzo (a) Anthracene. The highest concentration of total PAHs was detected in muscle of M2 (1.026 g/g) while the lowest was in M3 (0.026 g/g). According to safe consumption guide USEPA, the dosage of PAHs mud crabs may like to cause adverse health problem to human.