PMID- 31561297
OWN - NLM
STAT- MEDLINE
DCOM- 20191028
LR  - 20191028
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 235
DP  - 2019 Nov
TI  - Adsorption characteristics of cadmium onto microplastics from aqueous solutions.
PG  - 1073-1080
LID - S0045-6535(19)31437-7 [pii]
LID - 10.1016/j.chemosphere.2019.06.196 [doi]
AB  - As one of emerging contaminants, microplastics (MPs) can enter the environment 
      and adsorb toxic metals such as cadmium (Cd), thereby causing potential 
      environmental risks. However, adsorption characteristics of MPs are poorly 
      understood. Herein, batch experiments were performed to investigate the 
      adsorption characteristics of Cd onto high-density polyethylene (HDPE) MPs with 
      different particle sizes, that is, 1-2 mm, 0.6-1 mm, and 100-154 mum. The 
      adsorption of Cd was quite rapid initially, and the equilibrium time was 
      approximately 90 min. An increase in the pH of the Cd solution led to an increase 
      in Cd adsorption. MPs with particle size of 100-154 mum had the highest adsorption 
      capacity. Addition of 1, 10, and 100 mg/L NaCl all significantly decreased Cd 
      adsorption. Adsorption kinetics fitted the pseudo-second-order model. Adsorption 
      isotherm followed the Langmuir model and, to a lesser extent, the Freundlich 
      model, with estimated maximum adsorption capacity of 30.5 mug/g. The adsorbed Cd 
      easily desorbed from the MPs. Energy-dispersive X-ray spectroscopy (EDS) analysis 
      confirmed Cd adsorption to and desorption from MPs. Fourier transform infrared 
      (FTIR) spectroscopy analysis showed no new functional groups formed during the 
      adsorption and desorption processes, suggesting physical interaction may dominate 
      the Cd adsorption onto MPs. The present study findings provide evidence that MPs 
      can accumulate Cd, and the adsorbed Cd may be highly available, thus posing risks 
      to the organisms exposed to these MPs.
CI  - Copyright (c) 2019 Elsevier Ltd. All rights reserved.
FAU - Wang, Fayuan
AU  - Wang F
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China; Shandong Key Laboratory 
      of Water Pollution Control and Resource Reuse, School of Environmental Science 
      and Engineering, Shandong University, Qingdao, 266237, PR China.
FAU - Yang, Weiwei
AU  - Yang W
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China.
FAU - Cheng, Peng
AU  - Cheng P
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China.
FAU - Zhang, Shuqi
AU  - Zhang S
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China.
FAU - Zhang, Shuwu
AU  - Zhang S
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China; Shandong Key Laboratory 
      of Water Pollution Control and Resource Reuse, School of Environmental Science 
      and Engineering, Shandong University, Qingdao, 266237, PR China.
FAU - Jiao, Wentao
AU  - Jiao W
AD  - State Key Laboratory of Urban and Regional Ecology, Research Center for 
      Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR 
      China.
FAU - Sun, Yuhuan
AU  - Sun Y
AD  - College of Environment and Safety Engineering, Qingdao University of Science and 
      Technology, Qingdao, Shandong Province, 266042, PR China; Shandong Key Laboratory 
      of Water Pollution Control and Resource Reuse, School of Environmental Science 
      and Engineering, Shandong University, Qingdao, 266237, PR China. Electronic 
      address: yhsun@qust.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20190705
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 0 (Plastics)
RN  - 0 (Solutions)
RN  - 00BH33GNGH (Cadmium)
RN  - 059QF0KO0R (Water)
RN  - 9002-88-4 (Polyethylene)
SB  - IM
MH  - Adsorption
MH  - Cadmium/*chemistry
MH  - Kinetics
MH  - Particle Size
MH  - Plastics/*chemistry
MH  - Polyethylene/chemistry
MH  - Solutions
MH  - Spectroscopy, Fourier Transform Infrared
MH  - Water/*chemistry
OTO - NOTNLM
OT  - Adsorption
OT  - Cadmium
OT  - Desorption
OT  - Microplastics
OT  - Toxic metals
EDAT- 2019/09/29 06:00
MHDA- 2019/10/29 06:00
CRDT- 2019/09/29 06:00
PHST- 2019/03/14 00:00 [received]
PHST- 2019/06/12 00:00 [revised]
PHST- 2019/06/25 00:00 [accepted]
PHST- 2019/09/29 06:00 [entrez]
PHST- 2019/09/29 06:00 [pubmed]
PHST- 2019/10/29 06:00 [medline]
AID - S0045-6535(19)31437-7 [pii]
AID - 10.1016/j.chemosphere.2019.06.196 [doi]
PST - ppublish
SO  - Chemosphere. 2019 Nov;235:1073-1080. doi: 10.1016/j.chemosphere.2019.06.196. Epub 
      2019 Jul 5.