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Town RM, van Leeuwen HP. Uptake and Release Kinetics of Organic Contaminants Associated with Micro- and Nanoplastic Particles. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:10057-10067. [PMID: 32700905 DOI: 10.1021/acs.est.0c02297] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A generic theoretical framework is presented for describing the kinetics of uptake and release of organic compounds that associate with plastic particles. The underlying concepts account for the physicochemical features of the target organic compounds and the plastic particles. The developed framework builds on concepts established for dynamic speciation analysis by solid-phase microextraction and the size-dependent reactivity features of particulate complexants. The theoretical framework is applied to interpretation of literature data, thereby providing more rigorous insights into previous observations. The presented concepts enable predictions of the sink/source functioning of plastic particles and their impact on the dynamic chemical speciation of organic compounds in aqueous environmental media and within biota. Our results highlight the fundamental influence of particle size on the uptake and release kinetics. The findings call for a comprehensive description of the physicochemical features of plastic particles to be provided in experimental studies on micro- and nanoplastics in different types of aquatic environmental media.
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Affiliation(s)
- Raewyn M Town
- Systemic Physiological and Ecotoxicological Research (SPHERE), Department of Biology, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Herman P van Leeuwen
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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Alam MN, Pawliszyn J. Numerical Simulation and Experimental Validation of Calibrant-Loaded Extraction Phase Standardization Approach. Anal Chem 2016; 88:8632-9. [DOI: 10.1021/acs.analchem.6b01802] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Md. Nazmul Alam
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Janusz Pawliszyn
- Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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Prediction of partition coefficients of organic compounds between SPME/PDMS and aqueous solution. Int J Mol Sci 2014; 15:2585-95. [PMID: 24534804 PMCID: PMC3958869 DOI: 10.3390/ijms15022585] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 02/06/2014] [Accepted: 02/11/2014] [Indexed: 11/25/2022] Open
Abstract
Polydimethylsiloxane (PDMS) is commonly used as the coated polymer in the solid phase microextraction (SPME) technique. In this study, the partition coefficients of organic compounds between SPME/PDMS and the aqueous solution were compiled from the literature sources. The correlation analysis for partition coefficients was conducted to interpret the effect of their physicochemical properties and descriptors on the partitioning process. The PDMS-water partition coefficients were significantly correlated to the polarizability of organic compounds (r = 0.977, p < 0.05). An empirical model, consisting of the polarizability, the molecular connectivity index, and an indicator variable, was developed to appropriately predict the partition coefficients of 61 organic compounds for the training set. The predictive ability of the empirical model was demonstrated by using it on a test set of 26 chemicals not included in the training set. The empirical model, applying the straightforward calculated molecular descriptors, for estimating the PDMS-water partition coefficient will contribute to the practical applications of the SPME technique.
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Zielińska K, van Leeuwen HP, Thibault S, Town RM. Speciation analysis of aqueous nanoparticulate diclofenac complexes by solid-phase microextraction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14672-14680. [PMID: 22989313 DOI: 10.1021/la303143w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The dynamic sorption of an organic compound by nanoparticles (NPs) is analyzed by solid-phase microextraction (SPME) for the example case of the pharmaceutical diclofenac in dispersions of impermeable (silica, SiO(2)) and permeable (bovine serum albumin, BSA) NPs. It is shown that only the protonated neutral form of diclofenac is accumulated in the solid phase, and hence this species governs the eventual partition equilibrium. On the other hand, the rate of the solid/water partition equilibration is enhanced in the presence of the sorbing nanoparticles of SiO(2) and BSA. This feature demonstrates that the NPs themselves do not enter the solid phase to any appreciable extent. The enhanced rate of attainment of equilibrium is due to a shuttle-type of contribution from the NP-species to the diffusive supply of diclofenac to the water/solid interface. For both types of nanoparticulate complexes, the rate constant for desorption (k(des)) of bound diclofenac was derived from the measured thermodynamic affinity constant and a diffusion-limited rate of adsorption. The computed k(des) values were found to be sufficiently high to render the NP-bound species labile on the effective time scale of SPME. In agreement with theoretical prediction, the experimental results are quantitatively described by fully labile behavior of the diclofenac/nanoparticle system and an ensuing accumulation rate controlled by the coupled diffusion of neutral, deprotonated, and NP-bound diclofenac species.
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Affiliation(s)
- Katarzyna Zielińska
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
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Zhang X, Oakes KD, Luong D, Wen JZ, Metcalfe CD, Pawliszyn J, Servos MR. Temporal Resolution of Solid-Phase Microextraction: Measurement of Real-Time Concentrations within a Dynamic System. Anal Chem 2010; 82:9492-9. [DOI: 10.1021/ac102186u] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xu Zhang
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - Ken D. Oakes
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - Di Luong
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - John Z. Wen
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - Chris D. Metcalfe
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - Janusz Pawliszyn
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
| | - Mark R. Servos
- Departments of Biology, of Mechanical & Mechatronics Engineering, and of Chemistry, University of Waterloo, Ontario N2L 3G1, and Worsfold Water Quality Center, Trent University, Peterborough, Ontario K9J 7B8, Canada
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Benhabib K, Town RM, van Leeuwen HP. Dynamic speciation analysis of atrazine in aqueous latex nanoparticle dispersions using solid phase microextraction (SPME). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:3381-3386. [PMID: 19708138 DOI: 10.1021/la803499d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Solid phase microextraction (SPME) is applied in the dynamic speciation analysis of the pesticide atrazine in an aqueous medium containing sorbing latex nanoparticles. It is found that the overall rate of extraction of the analyte is faster than in the absence of nanoparticles and governed by the coupled diffusion of free and particle-bound atrazine toward the solid/sample solution interface. In the eventual equilibrium the total atrazine concentration in the solid phase is dictated by the solid phase/water partition coefficient (K(sw)) and the concentration of the free atrazine in the sample solution. These observations demonstrate that the nanoparticles do not enter the solid phase. The experimental data show that the rate of release of sorbed atrazine from the latex particles is fast on the effective time scale of the microextraction process. A lability criterion is derived to quantitatively describe the relative rates of these two processes. All together, the results indicate that SPME has a strong potential for dynamic speciation analysis of organic compounds in media containing sorbing nanoparticles.
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Affiliation(s)
- Karim Benhabib
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
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