PMID- 32371288
OWN - NLM
STAT- MEDLINE
DCOM- 20200525
LR  - 20200525
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 178
DP  - 2020 Jul 1
TI  - Influence of biofilm on the transport and deposition behaviors of nano- and 
      micro-plastic particles in quartz sand.
PG  - 115808
LID - S0043-1354(20)30345-6 [pii]
LID - 10.1016/j.watres.2020.115808 [doi]
AB  - Biofilm, community of bacteria ubiquitously present in natural environment, may 
      interact with plastic particles and affect the transport of plastic particles in 
      environment. The significance of biofilm (Escherichia coli) on the transport and 
      deposition behaviors of three different sized plastic particles (0.02 mum NPs, 
      0.2 mum MP and 2 mum MP) were examined under both 10 mM and 50 mM NaCl solutions by 
      comparing the breakthrough curves and retained profiles of plastic particles in 
      bare sand versus those in biofilm-coated sand. Regardless of ionic strengths, the 
      presence of biofilm increases the deposition of all three sized plastic particles 
      in porous media. Via employing X-ray microtomography imaging (XMT) and Scanning 
      electron microscope (SEM), we find that the presence of biofilm could narrow the 
      flow path especially near to the inlet of the column and increase the surface 
      roughness of porous media (by decreasing DLVO repulsive interaction), which 
      contributes to the enhanced the deposition of plastic particles. Extracellular 
      polymeric substances (EPS) present on the biofilm are found to contribute to the 
      enhanced deposition of plastic particles. Packed column experiments, quartz 
      crystal microbalance with dissipation (QCM-D) as well as parallel plate flow 
      chamber experiments all show that three major components of EPS, proteins, 
      polysaccharide, and humic substances all contribute to the enhanced deposition of 
      plastic particles. O-H and N-H groups present on cell surfaces are highly likely 
      to form hydrogen bond with plastic particles and increase the deposition plastic 
      particles. Elution experiments show that decreasing solution ionic strength could 
      release small portion of plastic particles from both bare and biofilm-coated sand 
      columns especially from the segments near to the column inlet (with slighter 
      lower percentage from biofilm-coated columns based on the total mass of retained 
      plastics). In contrast, increasing flow rate does not obviously detach the 
      plastic particles that already deposited onto porous media. The results of this 
      study clearly show that the presence of biofilm in natural environment could 
      enhance the deposition and decrease the transport of plastic particles.
CI  - Copyright (c) 2020. Published by Elsevier Ltd.
FAU - He, Lei
AU  - He L
AD  - The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College 
      of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR 
      China.
FAU - Rong, Haifeng
AU  - Rong H
AD  - The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College 
      of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR 
      China.
FAU - Wu, Dan
AU  - Wu D
AD  - Beijing Institute of Metrology, Beijing, 100029, PR China.
FAU - Li, Meng
AU  - Li M
AD  - The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College 
      of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR 
      China.
FAU - Wang, Chengyi
AU  - Wang C
AD  - The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College 
      of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR 
      China.
FAU - Tong, Meiping
AU  - Tong M
AD  - The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College 
      of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR 
      China. Electronic address: tongmeiping@pku.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20200411
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Plastics)
RN  - 0 (Sand)
RN  - 14808-60-7 (Quartz)
RN  - 7631-86-9 (Silicon Dioxide)
SB  - IM
MH  - Biofilms
MH  - Osmolar Concentration
MH  - *Plastics
MH  - Porosity
MH  - *Quartz
MH  - Sand
MH  - Silicon Dioxide
OTO - NOTNLM
OT  - Biofilm
OT  - Extracellular polymeric substances
OT  - Plastic particles
OT  - Quartz sand
OT  - Surface roughness
OT  - XMT
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2020/05/07 06:00
MHDA- 2020/05/26 06:00
CRDT- 2020/05/07 06:00
PHST- 2020/01/23 00:00 [received]
PHST- 2020/04/04 00:00 [revised]
PHST- 2020/04/07 00:00 [accepted]
PHST- 2020/05/07 06:00 [pubmed]
PHST- 2020/05/26 06:00 [medline]
PHST- 2020/05/07 06:00 [entrez]
AID - S0043-1354(20)30345-6 [pii]
AID - 10.1016/j.watres.2020.115808 [doi]
PST - ppublish
SO  - Water Res. 2020 Jul 1;178:115808. doi: 10.1016/j.watres.2020.115808. Epub 2020 
      Apr 11.