TY - JOUR
T1 - Direct Arsenic Removal from Water Using Non-Membrane, Low-Temperature Directional Solvent Extraction
AU - Guo, Jiaji
AU - Luo, Shirui
AU - Liu, Zeyu
AU - Luo, Tengfei
N1 - Funding Information:
This research is supported by National Science Foundation (award 1510826). We would like to thank Dr. Antonio Simonetti, Dr. Loretta Corcoran, Mr. Jon Loftus, and the Center for Environmental Science and Technology (CEST) for help with measuring the arsenic concentrations. We would also like to thank Prof. Per-Ola Norrby from AstraZeneca for his help in parametrizing the arsenic ion potentials. The simulation is partially supported by the Center for Research Computing at the University of Notre Dame and the NSF through XSEDE computing resources provided by TACC Stampede-2 under Grant TG-CTS100078. T.L. would also like to thank the Dorini Family for the endowed professorship in energy studies.
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/6/11
Y1 - 2020/6/11
N2 - Arsenic (As) poisoning in water is a critical global problem. Current arsenic removal techniques involving chemical reaction, ion exchange, or membrane processes can be expensive, inaccessible, or infeasible for underdeveloped regions. Here, we demonstrate that by using a so-called a directional solvent extraction (DSE) process arsenic ions in water can be effectively removed without membrane or chemical reaction, and this process promises to utilize low temperature heat (as low as 45 °C). We have tested feedwater with different arsenic concentrations and arsenic ions in different forms (As-III and As-V) commonly found in nature. It is demonstrated that DSE using decanoic acid as the directional solvent can purify contaminated water to meet the drinking water standard (arsenic concentration <10 parts per billion, ppb), and the arsenic removal efficiencies are higher than 91% for As-III and 97% for As-V. DSE can potentially lead to effective arsenic removal technologies with low resource settings.
AB - Arsenic (As) poisoning in water is a critical global problem. Current arsenic removal techniques involving chemical reaction, ion exchange, or membrane processes can be expensive, inaccessible, or infeasible for underdeveloped regions. Here, we demonstrate that by using a so-called a directional solvent extraction (DSE) process arsenic ions in water can be effectively removed without membrane or chemical reaction, and this process promises to utilize low temperature heat (as low as 45 °C). We have tested feedwater with different arsenic concentrations and arsenic ions in different forms (As-III and As-V) commonly found in nature. It is demonstrated that DSE using decanoic acid as the directional solvent can purify contaminated water to meet the drinking water standard (arsenic concentration <10 parts per billion, ppb), and the arsenic removal efficiencies are higher than 91% for As-III and 97% for As-V. DSE can potentially lead to effective arsenic removal technologies with low resource settings.
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U2 - 10.1021/acs.jced.9b00936
DO - 10.1021/acs.jced.9b00936
M3 - Article
AN - SCOPUS:85085650212
SN - 0021-9568
VL - 65
SP - 2938
EP - 2946
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
IS - 6
ER -