Organochlorine pesticides in a dated sediment core from Mapua, Waimea Inlet, New Zealand

Distribution and fate of organochlorine pesticide residues in sediments from the selected rivers in Taiwan

“…The relative concentrations of the parent DDT compound and its metabolites can provide useful information on the pollution source. The compound p; p 0 -DDT is the active ingredient of the DDT pesticides and typically makes up approximately 80% of the technical formulation (Bopp et al, 1982;Hendy and Peake, 1996). Fig.…”

“…The input pathways of OCPs into the river environments include discharge of domestic sewage and industrial wastewater, runoff from nonpoint sources, and direct dumping of wastes into the river. Although sediments do not constitute a direct measure of the degree of aquatic pollution, they offer an irreplaceable aid in reconstructing the historical inputs of OCPs based on profile descriptions of contamination in core samples Chemosphere 48 (2002) [237][238][239][240][241][242][243][244][245][246] www.elsevier.com/locate/chemosphere (Hendy and Peake, 1996). The distribution of various contaminants in sediments depends largely on the physicochemical properties of the ecosystem, the partition coefficients of individual contaminants, the organic contents, and microflora activities (Pavoni et al, 1987;Brook and Moore, 1988;McKenzie-Smith et al, 1994;Glynn et al, 1995).…”

Characterization and composition of heavy metals and persistent organic pollutants in water and estuarine sediments from Gao-ping River, Taiwan

“…The input pathways of POPs into the river environments include discharge of domestic sewage and industrial wastewater, runoff from nonpoint sources, and direct dumping of wastes into the river. Although sediments do not constitute a direct measure of the degree of aquatic pollution, they offer an irreplaceable aid in reconstructing the historical inputs of POPs based on profile descriptions of contamination in core samples (Hendy and Peake, 1996;Chang and Doong, 2006). Although the residual levels of the chlorinated compounds in the environments have considerably declined in the past thirty years, recent work has depicted that the chlorinated pesticides could be found in the range 0.04-330 ng/g-dry weight (dw) in marine and river sediments collected from Asian countries (Sarkar et al, 1997;Hong et al, 1999;Doong et al, 2002b;Hartwell, 2004;Wurl and Obbard, 2005;Minh et al, 2007).…”

Organochlorine Pesticide Residues in the Environment of Central Jianghan Plain, China

“…The relative concentrations of the parent DDT compound and its metabolites can also provide useful information about the pollution source. The compound p,p-DDT is the active ingredient of the DDT pesticides and typically makes up approximately 80 % of the technical formulation (Bopp et al, 1982;Hendy and Peake, 1996).…”