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Articles by D. Menier
Total Records ( 2 ) for D. Menier
  M.C. Ong , D. Menier , N.A.M. Shazili and V. Dupont
  Concentration of selected Metallic Trace Elements (MTEs), chromium, manganese, iron, cobalt, copper, zinc, lead and cadmium in surficial sediments from gulf of Morbihan were studied in order to understand the current MTEs contamination due to urbanization and mariculture economic development surrounding the gulf region. Therefore, the distribution, enrichment and accumulation of MTEs in 101 surficial sediments collected by Orange Peel grab were characterized for MTEs content using ICP-MS after mixed acid digestion. The average concentrations of selected MTEs were 36.2±23.9 μg g-1 dry weight (Cr), 278±140 μg g-1 dry weight (Mn), 2.40±1.29% (Fe), 14.4±5.31 μg g-1 dry weight (Co), 16.4±10.3 μg g-1 dry weight (Cu), 38.1±19.1 μg g-1 dry weight (Zn), 34.6±13.9 μg g-1 dry weight (Pb) and 0.11±0.06 μg g-1 dry weight (Cd), respectively. Results from the analysis showed that MTEs studied have relatively low index of geo-accumulation and enrichment factors values and were in value to conclude practically uncontaminated within the gulf. Overall, the geochemistry of the sediment of gulf of Morbihan was influenced by both natural and anthropogenic inputs to the catchment. However, direct comparison with upper continental crust indicated that natural processes were more dominant than anthropogenic input in concentrating metals.
  M.C. Ong , N.A.M. Shazili , D. Menier and A.W.M. Effendy
  The concentration of trace elements, copper, zinc, cadmium and lead in the two oyster species (Ostrea edulis) and (Crassostrea gigas) collected from mariculture sites in the Quiberon bay were studied to investigate metal contamination in the surrounding area and its significant risk assessment to human who consumed the both species. Cu, Zn, Cd and Pb were analyzed by using inductively coupled plasma-mass spectrometry after acid digestion process. Certified reference materials, Oyster tissue, SRM1556a was used to validate the methods and the results shown a good agreement with the certified values. The levels of Cu, Zn, Cd and Pb in oyster flesh were 0.26-14.5, 4.61-83.9, 0.01-0.11 and 0.02-0.41 mg kg-1 wet weight. Element levels in C. gigas were generally higher than O. edulis. Element concentrations in the flesh were assessed for human consumption according to Provisional Tolerable Weekly Intake (PTWI) and Provisional Tolerable Daily Intake (PTDI). Due to their bioaccumulation capacity of trace elements, both oysters’ species had the potential of being used as biomonitors to control the aquatic contaminations by trace elements.
 
 
 
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