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Title: On the Conversion of Bauxite Ores to Highly Activated Alumina Media for Water Remediation

Abstract

Good quality drinking water is necessary to maintain a high quality of life. Millions lack access to clean and safe drinking water, and current trends suggest that billions will face acute water shortages in the coming decades. Development of new materials has led to technological impacts on water purification, from desalination membranes to atmospheric water scavenging. However, the most challenging aspect of technological solutions is cost: if the community being serviced cannot afford the solution, it is not likely to be sustainable. Repurposing Earth-abundant materials to replace highly engineered solutions is an atractive solution. Herein, minimal processing of bauxite rocks produces a high-porosity and reactive activated alumina in situ, without purification directly from the ore. This acid-treated, thermally activated bauxite (ATAB) exhibits a high surface area of 401 ± 6 m2 g-1, a 40-fold increase relative to its parent ore, and a 2× increase relative to the state-of-the-art fluoride adsorbent, activated alumina. The composition, preparation, and mechanism of adsorption are studied by X-ray diffraction, X-ray photoelectron spectroscopy, and multiple-quantum magic-angle spinning 27Al nuclear magnetic resonance (NMR). Finally, the maximum adsorption density of ATAB is comparable with that of activated alumina, but ATAB requires fewer processing steps, thus warranting future considerationmore » as a primary adsorbent of choice for fluoride removal from water.« less

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [1];  [4]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Science Foundation (NSF)
OSTI Identifier:
1580891
Alternate Identifier(s):
OSTI ID: 1498174; OSTI ID: 1785921
Report Number(s):
LLNL-JRNL-805360
Journal ID: ISSN 2366-7486; ark:/13030/qt4tr367p5
Grant/Contract Number:  
AC02-05CH11231; MRI-1 126 394; AC52-07NA27344; AC02‐05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Advanced Sustainable Systems
Additional Journal Information:
Journal Volume: 3; Journal Issue: 7; Journal ID: ISSN 2366-7486
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; adsorption; fluoride; MAS-NMR; water; XPS

Citation Formats

Haddad, Andrew Z., Pilgrim, Corey D., Sawvel, April M., Hohman, James Nathan, and Gadgil, Ashok J. On the Conversion of Bauxite Ores to Highly Activated Alumina Media for Water Remediation. United States: N. p., 2019. Web. doi:10.1002/adsu.201900005.
Haddad, Andrew Z., Pilgrim, Corey D., Sawvel, April M., Hohman, James Nathan, & Gadgil, Ashok J. On the Conversion of Bauxite Ores to Highly Activated Alumina Media for Water Remediation. United States. https://doi.org/10.1002/adsu.201900005
Haddad, Andrew Z., Pilgrim, Corey D., Sawvel, April M., Hohman, James Nathan, and Gadgil, Ashok J. Wed . "On the Conversion of Bauxite Ores to Highly Activated Alumina Media for Water Remediation". United States. https://doi.org/10.1002/adsu.201900005. https://www.osti.gov/servlets/purl/1580891.
@article{osti_1580891,
title = {On the Conversion of Bauxite Ores to Highly Activated Alumina Media for Water Remediation},
author = {Haddad, Andrew Z. and Pilgrim, Corey D. and Sawvel, April M. and Hohman, James Nathan and Gadgil, Ashok J.},
abstractNote = {Good quality drinking water is necessary to maintain a high quality of life. Millions lack access to clean and safe drinking water, and current trends suggest that billions will face acute water shortages in the coming decades. Development of new materials has led to technological impacts on water purification, from desalination membranes to atmospheric water scavenging. However, the most challenging aspect of technological solutions is cost: if the community being serviced cannot afford the solution, it is not likely to be sustainable. Repurposing Earth-abundant materials to replace highly engineered solutions is an atractive solution. Herein, minimal processing of bauxite rocks produces a high-porosity and reactive activated alumina in situ, without purification directly from the ore. This acid-treated, thermally activated bauxite (ATAB) exhibits a high surface area of 401 ± 6 m2 g-1, a 40-fold increase relative to its parent ore, and a 2× increase relative to the state-of-the-art fluoride adsorbent, activated alumina. The composition, preparation, and mechanism of adsorption are studied by X-ray diffraction, X-ray photoelectron spectroscopy, and multiple-quantum magic-angle spinning 27Al nuclear magnetic resonance (NMR). Finally, the maximum adsorption density of ATAB is comparable with that of activated alumina, but ATAB requires fewer processing steps, thus warranting future consideration as a primary adsorbent of choice for fluoride removal from water.},
doi = {10.1002/adsu.201900005},
journal = {Advanced Sustainable Systems},
number = 7,
volume = 3,
place = {United States},
year = {Wed Mar 06 00:00:00 EST 2019},
month = {Wed Mar 06 00:00:00 EST 2019}
}

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