6 research outputs found
تراكيز المعادن الثقيلة في الاسماك المتوفرة تجاريا في اسواق قطاع غزة
No full textConcentrations of Zinc, Lead, Cadmium, Manganese, Copper and Nickel were determined in the muscles of six commercial fish species available in Gaza Strip markets, using atomic absorption spectroscopy after a modified wet digestion process. Three frozen imported fish species (Merluccius hubbsi, Micropogonias furnieri and Pangasius hypothalamus), two cultured species in local farms (Oreochromis niloticus and Sparus aurata) and one marine captured fish species (Mugil cephalus), were studied. Levels of metals in µg/g were as follows: Cu: 0.251-0.907, Zn: 3.705-20.535, Mn: 0.376-0.834, Ni: 0.453-0.978, Cd: Nd-0.09, Pb: Nd-0.552.All results were bellow the limits for fish consumption proposed by World Health Organization (1989, 1996) and Ministry of Agriculture, Fisheries and Food (1995). Lead and cadmium concentrations in Micropogonias furnieri fish exceeded the limits in fish proposed by EC (2005). Mugil Cephalus accumulated the highest levels of Cu, Mn and Ni, while the highest levels of Zn, Cd and Pb were detected in Micropogonias furnieri. Transfer factor indicated that local fishes (Sparus aurata, Oreochromis niloticus and Mugil cephalus), accumulated heavy metals from water. Diet and sediment were considered as additional sources for heavy metals. The estimated maximum total dietary intakes of all metals from the studied fishes were below the maximum acceptable daily intake values set by WHO (1993) and USA National Research Council (1989). Results showed that according to metals levels, consumption of studied fish had no threat to consumers health
Levels of organochlorine compounds in sediment and fish from Eastern Aegean coast and use of polymeric sorbent for the extraction of DDT
No full textPersistent organochlorine residues in fish and sediments collected from Eastern Aegean coast: Levels, occurrence and ecological risk
No full textOrganochlorines were determined in fish and sediment collected from Izmir and candarli Bays. The results indicated that Sigma Cyclodiens were generally predominant contaminants. In all samples, p,p'-DDE was the predominant DDT congener. Aroclors were found in noticeably higher levels than OCPs in sediment and the highest levels of Aroclors, OCPs were found in Nemrut which can be attributed to industrial activities. According to Sediment Quality Guidelines, DDTs were lower than the values that may cause adverse biological risk in sediment samples. Aroclor 1254 in sediments only exceeded the TEL value at Nemrut site. The maximum values of Sigma OCPs were found in fish collected from Giilbahce, while Aroclors were measured in Aliaga. According to related indices, results indicate no recent influxes of DDT in the sampling areas. The estimated daily intake of DDTs, Aroclor1254 were below the acceptable daily intake level recommended by FAO/WHO
Heavy metal concentrations in some commercially important fishes and their contribution to heavy metals exposure in Palestinian people of Gaza Strip (Palestine)
No full textAbstractThis study was carried out to provide information on heavy metal concentrations in the muscles of six commercial fish species available in Gaza Strip markets and to evaluate the possible risk associated with their consumption. The concentrations of cadmium (Cd), lead (Pb), copper (Cu), manganese (Mn), nickel (Ni) and zinc (Zn) were determined in the muscles of Merluccius hubbsi, Micropogonias furnieri, Pangasius hypothalamus, Oreochromis niloticus, Sparus aurata and Mugil cephalus. The levels of heavy metals were measured by atomic absorption spectrophotometry after digestion of the samples using kjldahl heating digester. There were great variations among heavy metal levels in the muscles of the six fish species. M. cephalus accumulated the highest levels of Cu, Mn and Ni, while the highest levels of Zn, Cd and Pb were detected in M. furnieri. The heavy metal concentrations found in muscles varied for Cu: 0.251–0.907, Zn: 3.705–20.535, Mn: 0.376–0.834, Ni: 0.453–0.978 and Pb: Nd-0.552μg/g wet weight. Cadmium was only detected in M. furnieri (0.09μg/g wet wt). The estimated levels of all metals in the present study were lower than the limits permitted by Food and Agriculture Organization of the United Nations/World Health Organization (FAO/WHO), European Community Regulation (EU), the United Kingdom Ministry of Agriculture, Fisheries and Food (MAFF), Turkish and Saudi guidelines. Lead and cadmium concentrations in M. furnieri however, exceeded the permissible limits in fish proposed by European Commission (EC). The estimated daily intakes (EDI) of all metals (μg/day/person) through consumption of the fish species by Palestinian people in the Gaza Strip were well below the permissible tolerable daily intake for 70kg person (PTDI70) set by FAO/WHO. Therefore, it can be concluded that no problems on human health would be raised at present from the consumption of commercial fish from the Gaza Strip markets
