Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Experimental Design
2.3. PCB Extraction
2.4. Analysis by Gas Chromatography Coupled to High-Resolution Mass Spectrometry (GC-HRMS)
3. Results and Discussion
3.1. Adsorption of Marker PCBs on Selected MPLs
3.1.1. Adsorption onto PS-MPLs
3.1.2. Adsorption onto PE-MPLs
3.1.3. Adsorption onto PET-MPLs
3.1.4. Comparison among MPLs
3.2. Adsorption Isotherms of Marker PCBs on Selected MPLs
3.3. Environmental Implications
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Spiking Level | PCB Congener | 5 ng/g | 10 ng/g | 15 ng/g | 20 ng/g | 25 ng/g | |||||
---|---|---|---|---|---|---|---|---|---|---|---|
Mean | ±SD | Mean | ±SD | Mean | ±SD | Mean | ±SD | Mean | ±SD | ||
%Ads on PE | PCB-28 | 58.27 | 5.48 | 58.24 | 4.08 | 60.64 | 2.43 | 58.59 | 1.76 | 60.88 | 6.70 |
PCB-52 | 56.29 | 4.50 | 59.95 | 1.68 | 60.55 | 3.63 | 57.14 | 4.00 | 58.64 | 3.05 | |
PCB-101 | 41.28 | 2.06 | 42.72 | 2.01 | 44.93 | 0.81 | 41.22 | 3.67 | 38.89 | 1.56 | |
PCB-118 | 0.00 | 0.00 | 12.89 | 0.80 | 14.17 | 0.69 | 5.75 | 1.04 | 0.00 | 0.00 | |
PCB-153 | 29.03 | 2.03 | 36.48 | 1.09 | 38.27 | 2.68 | 34.21 | 1.54 | 29.64 | 2.67 | |
PCB-138 | 5.77 | 0.36 | 28.31 | 2.26 | 31.01 | 3.10 | 27.37 | 0.55 | 22.78 | 0.91 | |
PCB-180 | 16.22 | 0.29 | 14.21 | 1.28 | 28.13 | 1.60 | 24.82 | 2.63 | 18.61 | 1.38 | |
ΣPCBs on PE (ng) | 0.103 | 0.253 | 0.417 | 0.498 | 0.574 | ||||||
%Ads on PET | PCB-28 | 62.87 | 4.21 | 66.96 | 2.68 | 63.82 | 2.55 | 63.53 | 10.80 | 65.47 | 1.64 |
PCB-52 | 60.02 | 2.82 | 62.97 | 4.22 | 58.71 | 4.70 | 58.06 | 3.08 | 60.11 | 4.03 | |
PCB-101 | 46.46 | 0.74 | 53.15 | 3.93 | 49.49 | 3.32 | 47.43 | 3.32 | 46.16 | 5.08 | |
PCB-118 | 17.34 | 0.35 | 32.13 | 2.57 | 20.45 | 0.39 | 16.94 | 1.52 | 15.66 | 1.47 | |
PCB-153 | 32.81 | 1.64 | 39.10 | 1.96 | 35.26 | 1.69 | 32.93 | 0.49 | 31.94 | 1.53 | |
PCB-138 | 21.78 | 1.96 | 35.02 | 4.20 | 29.28 | 4.10 | 26.25 | 1.05 | 22.45 | 1.35 | |
PCB-180 | 21.87 | 1.77 | 26.09 | 1.54 | 26.71 | 0.99 | 25.23 | 4.04 | 20.98 | 1.47 | |
ΣPCBs on PET (ng) | 0.132 | 0.315 | 0.426 | 0.541 | 0.657 | ||||||
%Ads on PS | PCB-28 | 48.58 | 0.97 | 56.12 | 6.17 | 50.13 | 6.52 | 54.86 | 4.39 | 53.46 | 4.81 |
PCB-52 | 55.19 | 3.86 | 60.49 | 7.86 | 53.60 | 7.50 | 59.41 | 3.80 | 57.07 | 2.17 | |
PCB-101 | 38.16 | 3.05 | 45.74 | 3.66 | 32.49 | 2.08 | 41.74 | 1.17 | 40.97 | 4.26 | |
PCB-118 | 14.42 | 1.50 | 31.22 | 2.22 | 8.17 | 0.66 | 21.17 | 1.48 | 20.19 | 0.36 | |
PCB-153 | 33.45 | 0.47 | 41.80 | 4.51 | 25.82 | 1.50 | 37.81 | 4.54 | 38.74 | 2.60 | |
PCB-138 | 26.42 | 1.59 | 34.24 | 1.57 | 15.50 | 1.86 | 31.00 | 4.34 | 36.63 | 0.51 | |
PCB-180 | 23.52 | 1.65 | 18.09 | 1.34 | 5.93 | 0.24 | 27.52 | 3.03 | 29.47 | 1.47 | |
ΣPCBs on PS (ng) | 0.063 | 0.151 | 0.151 | 0.287 | 0.363 |
Name | Spatial Conformation [24] | Descriptors [22] * | log Kow [25] | |
---|---|---|---|---|
PCB-28 | 2,4,4′-Trichlorobiphenylortho, para, para | | CP1, PP | 5.67 |
PCB-52 | 2,2′,5,5′-Tetrachlorobiphenylortho, ortho, meta, meta | | 4CL, 2M | 5.84 |
PCB-101 | 2,2′,4,5,5′-Pentachlorobiphenylortho, ortho, para, meta, meta | | 4CL, 2M | 6.38 |
PCB-118 | 2,3′,4,4′,5-Pentachlorobiphenylortho, meta, para, para, meta | | CP1, 4CL, PP, 2M | 6.74 |
PCB-138 | 2,2′,3,4,4′,5′-Hexachlorobiphenylortho, ortho, meta, para, para, meta | | 4CL, PP, 2M | 6.83 |
PCB-153 | 2,2′,4,4′,5,5′-Hexachlorobiphenylortho, ortho, para, para, meta, meta | | 4CL, PP, 2M | 6.92 |
PCB-180 | 2,2′,3,4,4′,5,5′-Heptachlorobiphenylortho, ortho, meta, para, para, meta, meta | | 4CL, PP, 2M | 7.36 |
log [q] = log KF + 1/n log [c] | log KF | KF (ng/mg) | n | |
---|---|---|---|---|
PS | y = 1.1599x + 2.4499; R2 = 0.9794 | 2.4499 | 281.77 | 0.862 |
PE | y = 1.1452x + 2.4258; R2 = 0.9253 | 2.4258 | 266.56 | 0.873 |
PET | y = 0.9532x + 2.8781; R2 = 0.9572 | 2.8781 | 755.27 | 1.049 |
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Llorca, M.; Ábalos, M.; Vega-Herrera, A.; Adrados, M.A.; Abad, E.; Farré, M. Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems. Toxics 2020, 8, 59. https://doi.org/10.3390/toxics8030059
Llorca M, Ábalos M, Vega-Herrera A, Adrados MA, Abad E, Farré M. Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems. Toxics. 2020; 8(3):59. https://doi.org/10.3390/toxics8030059
Chicago/Turabian StyleLlorca, Marta, Manuela Ábalos, Albert Vega-Herrera, Miquel A. Adrados, Esteban Abad, and Marinella Farré. 2020. "Adsorption and Desorption Behaviour of Polychlorinated Biphenyls onto Microplastics’ Surfaces in Water/Sediment Systems" Toxics 8, no. 3: 59. https://doi.org/10.3390/toxics8030059