A Study On Lead Pollutant Levels In Marine Fish And Exposure Assessment In Meilan District, Haikou City

The issue of lead pollution on food is always a hot research field in environmentalscience, biology, medicine, higiene, particular in food safty Scientists from different fields had taken up a series of studies on pollutant source of lead, pollutant levels, and the lead rule of migrate and transform, knew the risk to human beings health and safety when lead accumulates, transforms and food chain transfers in biologyLead accumulates in the body of aquatic organism through food chain. The biology in higher food chain, its body contents the higher level of lead.Many studies have proved that in the case of Non-professional exposure, Lead absorbs in human body mainly depend on food, especially the aquatic organism, such as the fish, which contains higher lead for residents aroud the sea..In this article, marine fish as the research object were randomly selected in four large farmer markets in Haikou Meilan District, measured lead level in the fish's muscle tissue, combined with data of diet survey evaluated lead content which residents through the consumption of marine fish, consequently a fullunderstanding lead contamination of marine fish in the area and its risk to human being health.The research results show that the edible fish in Haikou Meilan District whose middle value of the total lead is 0.078 mg/kg, the average value is 0.101 mg/kg, the middle content is lower than the average content. Revealed that the majority content of the sample at the low level. Lead values range of marine fish:0.003-0.396 mg/kg, did not exceed the national food safety standards,90% lead content in fish is lower than 0.22 mg/kg. In a variety of fish, the shad fish and Pacific saury were more lead content than the other fish, the average lead levels were 0.168 mg/kg and 0.170 mg/kg. Carnivorous fish, the average lead content is higher than omnivorous fish; The value of lead in fish of deep-sea fishing is greater than fish from seawater breed aquatics and offshore fishing, the average lead content in marine fish of seawater breed aquatics is slightly higher than marine fish from offshore fishing, the most of marine fish's lead content were positively correlated to their length and weight. lead content of marine fish has seasonal difference in May higher then in August.Compared to reports about lead contamination in aquatic products in domestic and foreign, the average lead content in marine fish is lower than limited standard of any country or organization in Meilan District, Haikou City. and also, lead content in marine fish was not found exceed level of lead in our country, but traces of lead pollution has also been found in fish, which should arouse our attention.Survey of residents diet in Haikou:The per capita intake of lead's average level through consumption of fish and shrimp is 10.4 ug/d in Haikou City, only PTDI (%) 4.8. Fish instake is 9.6% of total fish instake in Haikou Meilan District, While the actual intake of lead in marine fish of the residents (in fish mean total lead and lead the average of the highest concentrations represented by Pacific saury, and shad fish) were 10.4 ug/d,17.6 ug/d,17.4 ug/d were lower than the limit level of 20.5 ug/d.Analysis the survey data of diet for residents in Haikou:People are in a low level of lead intake through eating the seafish from Haikou in China and far lower than the lead intake per person per day.Feeding fish from Haikou is safe in adult, it is recommended that children in younger age group should limit their intakes in seafood。Lead intakes in aquatic products of the residents from the Haikou's main exporter are all very small, far lower than the lead intake per person per day, Consumption of the export aquatic products from Haikou City are safe.