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Open AccessArticle

Significance of Chlorinated Phenols Adsorption on Plastics and Bioplastics during Water Treatment

Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
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Water 2019, 11(11), 2358; https://doi.org/10.3390/w11112358
Received: 2 October 2019 / Revised: 6 November 2019 / Accepted: 7 November 2019 / Published: 10 November 2019
(This article belongs to the Special Issue Advances in In Situ Biological and Chemical Groundwater Treatment)
Microplastics and chlorinated phenols (CPs) are pollutants found ubiquitously in freshwater systems. Meanwhile, bioplastics are attracting much attention as alternatives to conventional plastics, but there is little data about their effect on the behaviour of pollutants. This work therefore investigates the sorption of four CPs (4-chlorophenol—4-CP, 2,4-dichlorophenol—2,4-DCP, 2,4,6-trichlorophenol—2,4,6-TCP and pentachlorophenol—PCP) on three different plastics (polyethylene (PЕg), polypropylene (PP) and polylactic acid (PLA)) using kinetics and isotherm studies. All experiments were carried out in a synthetic water matrix and in spiked Danube river water. In all cases, adsorption kinetics fitted well with the pseudo-second order rate model. Adsorption proceeded through two linear phases, corresponding to transport from the bulk solution to the external surfaces and then into the interior pores of the sorbents. Maximum adsorption capacities calculated with the Langmuir isotherm indicated that whereas adsorption of 4-CP was not significantly affected by the type of plastic present, the adsorption of 2,4-DCP, 2,4,6-TCP and PCP varied greatly, with polypropylene showing the greatest affinity for CPs adsorption. The differences observed between the adsorption behaviour of CPs in the synthetic and natural water matrices suggest further investigation is required into how the different fractions of natural organic matter impact interactions between CPs and plastics. View Full-Text
Keywords: microplastic; bioplastic; chlorinated phenols; sorption; kinetics; matrix effect microplastic; bioplastic; chlorinated phenols; sorption; kinetics; matrix effect
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Tubić, A.; Lončarski, M.; Maletić, S.; Molnar Jazić, J.; Watson, M.; Tričković, J.; Agbaba, J. Significance of Chlorinated Phenols Adsorption on Plastics and Bioplastics during Water Treatment. Water 2019, 11, 2358.

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