Adsorption mechanisms of five bisphenol analogues on PVC microplastics

Wu, Pengfei1,2; Cai, Zongwei2; Jin, Hangbiao2,3; Tang, Yuanyuan1

2019-02-10

10.1016/j.scitotenv.2018.09.049

SCIENCE OF THE TOTAL ENVIRONMENT   影响因子和分区

0048-9697

1879-1026

Polyvinyl chloride (PVC) plastics are easily embrittled and decomposed to microplastics in an aquatic environment. The plasticizers such as bisphenol A (BPA), bisphenol S (BPS) and their analogues might be released and adsorbed by the PVC microplastics causing consequential pollution to the ecosystem. Herein, a systematic study was performed to determine the adsorption mechanisms of five bisphenol analogues (BPA, BPS, BPF, BPB and BPAF) on PVC microplastics. The maximum adsorption efficiency reached 0.19 +/- 0.02 mg.g(-1) (BPA), 0.15 +/- 0.01 mg.g(-1) (BPS), 0.16 +/- 0.01mg.g(-1) (BPF), 0.22 +/- 0.01mg.g(-1) (BPB), and 0.24 +/- 0.02 mg.g(-1) (BPAF) at PVC dosage of 1.5g.L-1. The kinetics study shows that the adsorption processes can be divided into three stages including external mass transport, intraparticle diffusion and dynamic equilibrium. The isotherm modeling shows a better fit of the adsorption results to the Freundlich isotherm compared to the Langmuir model. The thermodynamic study indicates the adsorption of all bisphenols as exothermic processes. Furthermore, the adsorption mechanisms of bisphenols were explicated intensively, with respect to hydrophobic interactions, electrostatic forces, and noncovalent bonds. A positive effect of hydrophobic interactions was identified for bisphenols adsorption on PVC microplastics, but an obvious inhibition by electrostatic repulsions was revealed for BPF due to its ionization in the neutral solution. In addition, noncovalent bonds (hydrogen and halogen bonds) may promote the adsorption of bisphenols on PVC microplastics. Finally, the desorption and competitive adsorption of five bisphenol analogues on the microplastics were provided together with a perspective for future works. (C) 2018 Published by Elsevier B.V.

Microplastics Bisphenol analogues Adsorption mechanisms Kinetics Isotherms Thermodynamics

SCI ; EI

英语

ESI高被引

第一 ; 通讯

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control[2017B030301012]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000447092700069

ELSEVIER SCIENCE BV

20183705805487

Adsorption ; Chlorine compounds ; Electrostatics ; Enzyme kinetics ; Hydrogen bonds ; Hydrophobicity ; Isotherms ; Phenols ; Solvents ; Thermodynamics

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Physical Chemistry:801.4 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Physical Properties of Gases, Liquids and Solids:931.2

ENVIRONMENT/ECOLOGY

Web of Science

1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, 1088 Xueyuan Blvd, Shenzhen 518055, Peoples R China
2.Hong Kong Baptist Univ, State Key Lab Environm & Biol Anal, Dept Chem, Hong Kong, Hong Kong, Peoples R China
3.Zhejiang Univ Technol, Key Lab Microbial Technol Ind Pollut Control Zhej, Coll Environm, Hangzhou 310014, Zhejiang, Peoples R China

Wu, Pengfei,Cai, Zongwei,Jin, Hangbiao,et al. Adsorption mechanisms of five bisphenol analogues on PVC microplastics[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650:671-678.

Wu, Pengfei,Cai, Zongwei,Jin, Hangbiao,&Tang, Yuanyuan.(2019).Adsorption mechanisms of five bisphenol analogues on PVC microplastics.SCIENCE OF THE TOTAL ENVIRONMENT,650,671-678.

Wu, Pengfei,et al."Adsorption mechanisms of five bisphenol analogues on PVC microplastics".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019):671-678.