Experimental verification of a model describing solid phase microextraction (SPME) of freely dissolved organic pollutants in sediment porewater

• Published in: Chemosphere (Oxford) Vol. 72; no. 10; pp. 1435 - 1440
• Main Authors: Yang, Ze-Yu, Maruya, Keith A., Greenstein, Darrin, Tsukada, David, Zeng, Eddy Y.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.08.2008; Elsevier
• Subjects: 14C-radioactivity; Analysis methods; Animal, plant and microbial ecology; Applied ecology; Applied sciences; Biological and medical sciences; Biological and physicochemical properties of pollutants. Interaction in the soil; Calibration; Dichlorodiphenyl Dichloroethylene - chemistry; Dichlorodiphenyl Dichloroethylene - isolation & purification; Dimethylpolysiloxanes - chemistry; Dimethylpolysiloxanes - isolation & purification; Disposable PDMS coated fibers; Earth sciences; Earth, ocean, space; Ecotoxicology, biological effects of pollution; Engineering and environment geology. Geothermics; Exact sciences and technology; Freely dissolved concentration; Fundamental and applied biological sciences. Psychology; Geologic Sediments - chemistry; Hydrophobic organic contaminants; Phenanthrenes - chemistry; Phenanthrenes - isolation & purification; Pollution; Pollution, environment geology; Polychlorinated Biphenyls - chemistry; Polychlorinated Biphenyls - isolation & purification; Reproducibility of Results; Sediment porewater; Soil and sediments pollution; Solid Phase Microextraction - methods; Solid Phase Microextraction - standards; Techniques; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Freely dissolved concentration; Hydrophobic organic contaminants; Disposable PDMS coated fibers; Sediment porewater; 14C-radioactivity; Disposable PDMS coated fibers,14C-radioactivity,Hydrophobic organic contaminants,Freely dissolved concentration,Sediment porewater; Phenanthrene; DDE; Hydrocarbon; Pollutant behavior; Pesticides; Polychlorobiphenyls; Hydrophobic compound; Bioavailability; Polycyclic aromatic compound; Experimental study; Forecast model; Soil pollution; Sediments; Interstitial water; Persistent organic pollutant; Solid phase microextraction; Algorithm performance; Organochlorine compounds; Model compound; Chlorocarbon; Environment impact; Aromatic compound; Organic compounds
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2008.05.028

To verify a theoretical mass balance and multiple compartment partitioning model developed to predict freely dissolved concentrations (FDCs) of hydrophobic organic chemicals (HOCs) using negligible depletion-solid phase microextraction (nd-SPME), a series of sediment slurry experiments were performed using disposable poly(dimethyl)siloxane (PDMS) coated-SPME fibers and 14C-radiolabeled HOC analogs. First, pre-calibration of disposable PDMS coated fibers for four model compounds (phenanthrene, PCB 52, PCB 153 and p,p′-DDE) with good precision (⩽10%) was achieved. Second, sediment slurries spiked and aged with the radiolabeled analogs were extracted by SPME with manipulation of the sediment slurry mass (ms) or the PDMS coating volume (Vf). The measured extent of depletion by SPME (xe) decreased with increasing sediment mass (ms); conversely, xe increased with increasing Vf, which is consistent with the theoretical prediction from our previous model [Yang, Z.-Y., Zeng, E.Y., Maruya, K.A., Mai, B.-X., Ran, Y., 2007b. Predicting organic contaminant concentrations in sediment porewater using solid-phase microextraction. Chemosphere 66, 1408–1414]. Moreover, the SPME-measured FDCs (Cpw,SPME) followed the order of phenanthrene>PCB 52>PCB 153, and the measured and predicted Cpw values were not substantially different from empirically determined values except for p,p′-DDE.