Accumulation of trace elements, pesticides, and polychlorinated biphenyls in sediments and the clam Corbicula manilensis of the Apalachicola River, Florida.

摘要: A survey of trace element and synthetic organic compound concentrations in bottom materials was conducted on the Apalachicola River northwest Florida 1979–80 as part Quality Assessment. Substances analyzed included elements (predominantly heavy metals), organochlorine insecticides, organophosphorus chlorinated phenoxy-acid herbicides, poly biphenyls (PCBs). Three kinds were surveyed: finegrained sediments, whole-body tissue Asiatic clamCorbicula manilensis, bottom-load detritus. No hazardous levels any substances found. Concentrations sediments clams generally at least ten times lower than maximum limits considered safe for biota aquatic systems. comparison trace-substance data from with Lake Seminole (upstream) Bay (downstream) showed riverine clams. Sediment all parts system comparable. Most enter river upstream basin (the Chattahoochee Flint Rivers Georgia Alabama) nonpoint sources throughout basin. There are no major point discharges along Apalachicola. Trend analysis limited by scope study, but did not reveal spatial or temporal trends analyzed. compounds most metals inCorbicula manilensis correlate those sediments.