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- W2348944845 abstract "Anthropogenic activties have caused heavier organic poliution in the Changjiang River Estuary since the past fifty years. There were about 308 categories of organic pollutants examined in the estuary in the earlier years of this century. The pollutant levels of Hexachloro-cyclohexanes (HCHs) and Dichloro-diphenyl trichloroethanes (DDTs) appeared to increase during the 1960s to the 1980s, and then began to decrease after that time, which approximately corresponded to their production and application history. Some organochlorine pesticides (OCPs) are still dangerous to the ecosystem health of the Changjiang River Estuary now. Compared with the situation in the 1980s, the pollution of polychlorinated biphen-yls (PCBs) was more serious in the Changjiang River Estuary in the 1990s. Oil pollution had already appeard along China coasts during the 1950s to the 1960s and its concentration peak in the Changjiang River Estuary appeared in 1990, and then decreased from the middle of the 1990s. The pollution by polycyclic aromatic hydrocarbons (PAHs) in the Changjiang River Estuary was very light before the 1980s; however, with the speedy industrial development in the Changjiang drainage basin from the 1980s, it entered in an aggravation period until the middle of the 1990s." @default.
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- W2348944845 date "2007-01-01" @default.
- W2348944845 modified "2023-09-24" @default.
- W2348944845 title "EVOLUTION OF ORGANIC POLLUTION IN THE CHANGJIANG RIVER ESTUARY IN THE PAST FIFTY YEARS" @default.
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