PMID- 34198199
OWN - NLM
STAT- MEDLINE
DCOM- 20210805
LR  - 20210805
IS  - 1879-2448 (Electronic)
IS  - 0043-1354 (Linking)
VI  - 201
DP  - 2021 Aug 1
TI  - Removal of arsenic(III) via nanofiltration: contribution of organic matter 
      interactions.
PG  - 117315
LID - S0043-1354(21)00513-3 [pii]
LID - 10.1016/j.watres.2021.117315 [doi]
AB  - The removal of arsenic(III) (As(III)) with nanofiltration (NF) was investigated 
      with emphasis on the role of salinity, pH and organic matter on retention 
      mechanisms. While no measurable impact of salinity on As(III) retention with NF 
      membranes (NF270 and NF90) was observed, a significant increase in As(III) 
      retention occurred from pH 9 to pH 12. This was explained by As(III) 
      deprotonation at pH > 9 that enhanced Donnan (charge) exclusion. Of the five 
      different organic matter types investigated at 10 mgC/L, only humic acid (HA) 
      increased As(III) retention by up to 10%. Increasing HA concentration to 100 
      mgC/L enhanced As(III) retention by 40%, which was attributed to As(III)-HA 
      complexation. Complexation was confirmed by field-flow fractionation inductively 
      coupled plasma mass spectrometry (FFF-ICP-MS) measurements, which showed that the 
      bound As(III) increased with HA concentration. Time-of-flight secondary ion mass 
      spectrometry (ToF-SIMS) showed that NF90, which exhibited lower permeability 
      reduction than NF270, has accumulated a lower amount of As(III) in the presence 
      of HA, where As(III)-HA complex was formed in the feed solution. This finding 
      implies that As(III) retention with NF technology can be enhanced by 
      complexation, instead of using other methods such as oxidation or pH adjustement.
CI  - Copyright (c) 2021. Published by Elsevier Ltd.
FAU - Boussouga, Youssef-Amine
AU  - Boussouga YA
AD  - Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of 
      Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, 
      Germany. Electronic address: youssef-amine.boussouga@kit.edu.
FAU - Mohankumar, Malini Bangalore
AU  - Mohankumar MB
AD  - Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of 
      Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, 
      Germany.
FAU - Gopalakrishnan, Akhil
AU  - Gopalakrishnan A
AD  - Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of 
      Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, 
      Germany.
FAU - Welle, Alexander
AU  - Welle A
AD  - Institute of Functional Interfaces (IFG), KIT, 76344 Eggenstein-Leopoldshafen, 
      Germany; Karlsruhe Nano Micro Facility (KNMF), KIT, 76344 
      Eggenstein-Leopoldshafen, Germany.
FAU - Schafer, Andrea I
AU  - Schafer AI
AD  - Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of 
      Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, 
      Germany.
LA  - eng
PT  - Journal Article
DEP - 20210531
PL  - England
TA  - Water Res
JT  - Water research
JID - 0105072
RN  - 0 (Humic Substances)
RN  - N712M78A8G (Arsenic)
SB  - IM
MH  - *Arsenic
MH  - Humic Substances/analysis
MH  - Spectrum Analysis
OTO - NOTNLM
OT  - Physico-chemical water treatment
OT  - arsenite retention
OT  - complexation
OT  - membrane filtration
OT  - natural organic matter
OT  - speciation
EDAT- 2021/07/02 06:00
MHDA- 2021/08/06 06:00
CRDT- 2021/07/01 20:25
PHST- 2021/03/12 00:00 [received]
PHST- 2021/05/22 00:00 [revised]
PHST- 2021/05/26 00:00 [accepted]
PHST- 2021/07/02 06:00 [pubmed]
PHST- 2021/08/06 06:00 [medline]
PHST- 2021/07/01 20:25 [entrez]
AID - S0043-1354(21)00513-3 [pii]
AID - 10.1016/j.watres.2021.117315 [doi]
PST - ppublish
SO  - Water Res. 2021 Aug 1;201:117315. doi: 10.1016/j.watres.2021.117315. Epub 2021 
      May 31.