Characteristics of sorption losses of polychlorinated biphenyl congeners onto glass surfaces

Sorption losses to glass surfaces of five polychlorinated biphenyl (PCB) congeners in aqueous solutions were investigated. Adsorption/desorption experiments were conducted under conditions that simulated actual sample handling procedures for environmental samples. It was found that the adsorption lo...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2000-12, Vol.41 (12), p.1857-1864
Main Authors: Lung, Shih-Chun, Yanagisawa, Yukio, Ford, Timothy E, Spengler, John D
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Chemical Phenomena
Chemistry, Physical
Environmental sampling
Exact sciences and technology
Glass - chemistry
Global environmental pollution
Pollution
Polychlorinated biphenyls
Polychlorinated Biphenyls - chemistry
Solutions
Sorption loss
Water
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Summary:Sorption losses to glass surfaces of five polychlorinated biphenyl (PCB) congeners in aqueous solutions were investigated. Adsorption/desorption experiments were conducted under conditions that simulated actual sample handling procedures for environmental samples. It was found that the adsorption loss is related to the degree of chlorination. PCB congener 180 lost the most onto glass surfaces, followed by congeners 138, 101/28, and 52, in decreasing order. More PCB adsorption occurred onto glass under conditions of agitation and higher temperature (22°C) during the five-day experimental period. The salinity effect (“salting out effect”) was also observed in this work. The efficiency of desorption (rinsing three times with solvent) was found to be ineffective in extracting adsorbed PCBs. It was necessary to use mechanical shaking for extraction. Storage of samples up to five days resulted in sorption losses as much as 30%, 17%, 30%, 40%, and 55% of PCB 28, 52, 101, 138, and 180, respectively. Sorption losses need to be considered when conducting water sampling or toxicological studies to avoid underestimation of the actual PCB concentrations and their toxic effects.
ISSN:0045-6535
1879-1298
DOI:10.1016/S0045-6535(00)00082-5