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335701 
Journal Article 
Adsorption of Pb and Cd on the natural surface coatings (NSCs) in the presence of organochlorine pesticides : A preliminary investigation 
Shuhai, GUO; Yu, LI; Liang, LIU; Xiuyi, HUA 
2008 
Yes 
Journal of Environmental Management
ISSN: 0301-4797
EISSN: 1095-8630 
88 
1 
147-153 
Adsorption of Pb and Cd in the presence and absence of organochlorine pesticides (OCPs) on natural surface coatings (NSCs), which were collected in the Nanhu Lake in Changchun, China, was measured in order to investigate the effect of the OCPs on the adsorption of heavy metals on the NSCs. Adsorption of Pb/Cd was carried out under controlled laboratory conditions (mineral salt solution with defined species, ionic strength 0.05mol/l, 25 °C and pH 6.0) with initial Pb and Cd concentrations ranging from 0.2 to 2.5mol/l. The classical Langmuir adsorption isotherm was applied to estimate the equilibrium coefficients of the adsorption of Pb and Cd on the NSCs. Adsorption interference between Pb/Cd and the OCPs on the NSCs indicated that the adsorption of Pb/Cd on the NSCs was influenced by the OCPs, and competitive adsorption between Pb and the OCPs was observed while adsorption of Cd was enhanced by addition of the OCPs. Adsorption data fit the Langmuir isotherm well for the NSCs treated with the OCPs at different equilibrium concentrations. The results showed that the amount of adsorbed Pb decreased by more than 40% while the amount of adsorbed Cd increased by over 60% with an increase in the initial concentrations of the OCPs ranging from 0 to 5.0 μg/l and that adsorption of Pb/Cd on the NSCs was strongly affected by the OCPs. This preliminary study highlights the importance of the OCPs on the NSCs in controlling the transport, fate, biogeochemistry, bioavailability and toxicity of trace metals in aquatic environments. (English) 
Adsorption; Lead and Cadmium; Natural surface coatings; Organochlorine pesticides; Milieu eau douce; Etat adsorbé; Eau surface; Pollution eau; Devenir polluant; Lac; Chine; Gestion environnement; Organochloré; Pesticide; Cadmium; Plomb; Asie; Revêtement surface; Lac Nanhu; Freshwater environment; Adsorbed state; Surface water; Water pollution; Pollutant behavior; Lakes; China; Environmental management; Organochlorine compounds; Pesticides; Lead; Asia; Surface coating; Medio agua dulce; Estado adsorbido; Agua superficie; Contaminación agua; Evolución contaminante; Lago; Gestiòn medio ambiente; Organoclorado; Plaguicida; Cadmio; Plomo; Adsorción