Imperial College London

Prof. Ramon Vilar

Faculty of Natural SciencesDepartment of Chemistry

Professor of Medicinal Inorganic Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 1967r.vilar Website

 
 
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Location

 

301HMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Bullen:2020:10.1016/j.watres.2020.115650,
author = {Bullen, JC and Torres-Huerta, A and Salaün, P and Watson, JS and Majumdar, S and Vilar, R and Weiss, DJ},
doi = {10.1016/j.watres.2020.115650},
journal = {Water Research},
pages = {1--11},
title = {Portable and rapid arsenic speciation in synthetic and natural waters by an As(V)-selective chemisorbent, validated against anodic stripping voltammetry},
url = {http://dx.doi.org/10.1016/j.watres.2020.115650},
volume = {175},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Inorganic arsenic speciation, i.e. the differentiation between arsenite and arsenate, is an important step for any program aiming to address the global issue of arsenic contaminated groundwater, whether for monitoring purposes or the development of new water treatment regimes. Reliable speciation by easy-to-use, portable and cost-effective analytical techniques is still challenging for both synthetic and natural waters. Here we demonstrate the first application of an As(V)-selective chemisorbent material for simple and portable speciation of arsenic using handheld syringes, enabling high sample throughput with minimal set-up costs. We first show that ImpAs efficiently removes As(V) from a variety of synthetic groundwaters with a single treatment, whilst As(III) is not retained. We then exemplify the potential of ImpAs for simple and fast speciation by determining rate constants for the photooxidation of As(III) in presence of a TiO2 photocatalyst. Finally, we successfully speciate natural waters spiked with a mix of As(III) and As(V) in both Indian and UK groundwaters with less than 5mgL−1 dissolved iron. Experimental results using ImpAs agreed with anodic stripping voltammetry (ASV), a benchmark portable technique, with analysis conditions optimised here for the groundwaters of South Asia. This new analytical tool is simple, portable and fast and should find applications within the overall multi-disciplinary remediation effort that is taking place to tackle this worldwide arsenic problem.
AU - Bullen,JC
AU - Torres-Huerta,A
AU - Salaün,P
AU - Watson,JS
AU - Majumdar,S
AU - Vilar,R
AU - Weiss,DJ
DO - 10.1016/j.watres.2020.115650
EP - 11
PY - 2020///
SN - 0043-1354
SP - 1
TI - Portable and rapid arsenic speciation in synthetic and natural waters by an As(V)-selective chemisorbent, validated against anodic stripping voltammetry
T2 - Water Research
UR - http://dx.doi.org/10.1016/j.watres.2020.115650
UR - https://www.sciencedirect.com/science/article/pii/S004313542030186X
UR - http://hdl.handle.net/10044/1/77111
VL - 175
ER -