The organochlorine contamination history of the Mersey estuary, UK, revealed by analysis of sediment cores from salt marshes.

摘要: Sediment profiles in the Banks, Ince and Widnes Warth salt marshes Northwest England contain a mappable record of historic pollution. For persistent organochlorine compounds this stretches back over 90 years. The PCB HCH can be successfully rationalised by dating methods, they related to dates initial production subsequent withdrawal from use these chemicals as result restrictive environmental legislation. HCB has more complex pollution profile it been manufactured England, both deliberately pesticide accidentally by-product several chlorination processes, start 20th century. concentrations degradation products DDT are relatively constant through sediment dominated op′- pp′-DDD with only minor contributions most toxic species, pp′-DDT. quantities resident reservoir pollutants under have calculated, fallen progressively last 30–50