PMID- 35276106
OWN - NLM
STAT- MEDLINE
DCOM- 20220506
LR  - 20220506
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 298
DP  - 2022 Jul
TI  - Aging of microplastics increases their adsorption affinity towards organic 
      contaminants.
PG  - 134238
LID - S0045-6535(22)00731-7 [pii]
LID - 10.1016/j.chemosphere.2022.134238 [doi]
AB  - When released in the environment, microplastics undergo surface weathering due to 
      mechanical abrasion and ultraviolet exposure. In this study, the adsorption of 
      two model contaminants, phenanthrene and methylene blue, by weathered high 
      density polyethylene (HDPE) and polypropylene (PPE) was evaluated to understand 
      how the microplastics' aging influences contaminant adsorption. Microplastics 
      were aged through an accelerated weathering process using ultraviolet exposure 
      with or without hydrogen peroxide. Adsorption isotherms were conducted for both 
      contaminants on pristine and aged microplastics. The adsorption of organic 
      contaminants was higher on aged microplastics than on pristine ones, with 
      methylene blue having the highest affinity increase with aging at 4.7-fold and 
      phenanthrene having a 1.9-fold increase compared to the pristine particles. To 
      understand the mechanisms involved with higher adsorption of contaminants by aged 
      microplastics, changes in the specific surface area and surface chemistry of aged 
      microplastics were characterized by Fourier Transform Infrared Spectroscopy, 
      X-ray Photoelectron Spectroscopy, zeta potential, X-ray tomography, and 
      Brunauer-Emmett-Teller krypton adsorption analyses. The results of this study 
      show that oxidation of microplastics can enhance the adsorption of organic 
      contaminants, which may increase their role as vectors of contaminants in the 
      aquatic food chain.
CI  - Copyright (c) 2022 Elsevier Ltd. All rights reserved.
FAU - Bhagat, Kartik
AU  - Bhagat K
AD  - School of Sustainable Engineering and the Built Environment, Arizona State 
      University, USA.
FAU - Barrios, Ana C
AU  - Barrios AC
AD  - School of Sustainable Engineering and the Built Environment, Arizona State 
      University, USA.
FAU - Rajwade, Kimya
AU  - Rajwade K
AD  - School of Sustainable Engineering and the Built Environment, Arizona State 
      University, USA.
FAU - Kumar, Abhishek
AU  - Kumar A
AD  - School of Sustainable Engineering and the Built Environment, Arizona State 
      University, USA.
FAU - Oswald, Jay
AU  - Oswald J
AD  - School of Engineering of Matter, Transport and Energy, Arizona State University, 
      USA.
FAU - Apul, Onur
AU  - Apul O
AD  - Department of Civil and Environmental Engineering, University of Maine, Orono, 
      USA.
FAU - Perreault, Francois
AU  - Perreault F
AD  - School of Sustainable Engineering and the Built Environment, Arizona State 
      University, USA. Electronic address: francois.perreault@asu.edu.
LA  - eng
PT  - Journal Article
DEP - 20220308
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Microplastics)
RN  - 0 (Phenanthrenes)
RN  - 0 (Plastics)
RN  - 0 (Water Pollutants, Chemical)
RN  - T42P99266K (Methylene Blue)
SB  - IM
MH  - Adsorption
MH  - Methylene Blue
MH  - Microplastics
MH  - *Phenanthrenes
MH  - Plastics
MH  - *Water Pollutants, Chemical/analysis
OTO - NOTNLM
OT  - Adsorption
OT  - Carbonyl index
OT  - Organic contaminant
OT  - Surface weathering
EDAT- 2022/03/12 06:00
MHDA- 2022/05/07 06:00
CRDT- 2022/03/11 20:10
PHST- 2021/12/26 00:00 [received]
PHST- 2022/02/26 00:00 [revised]
PHST- 2022/03/04 00:00 [accepted]
PHST- 2022/03/12 06:00 [pubmed]
PHST- 2022/05/07 06:00 [medline]
PHST- 2022/03/11 20:10 [entrez]
AID - S0045-6535(22)00731-7 [pii]
AID - 10.1016/j.chemosphere.2022.134238 [doi]
PST - ppublish
SO  - Chemosphere. 2022 Jul;298:134238. doi: 10.1016/j.chemosphere.2022.134238. Epub 
      2022 Mar 8.