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Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent
Fluoride (F) and arsenic (As) are two typical and harmful elements that are found in high concentrations in geothermal water in Tibet. In this work, yak dung, an abundant source of biomass energy in Tibet, was made into biochars (BC1, BC2 and BC3) by pyrolysis under different conditions, and the bet...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6281945/ https://www.ncbi.nlm.nih.gov/pubmed/30564414 http://dx.doi.org/10.1098/rsos.181266 |
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author | Chunhui, Luo Jin, Tian Puli, Zhu Bin, Zhou Duo, Bu Xuebin, Lu |
author_facet | Chunhui, Luo Jin, Tian Puli, Zhu Bin, Zhou Duo, Bu Xuebin, Lu |
author_sort | Chunhui, Luo |
collection | PubMed |
description | Fluoride (F) and arsenic (As) are two typical and harmful elements that are found in high concentrations in geothermal water in Tibet. In this work, yak dung, an abundant source of biomass energy in Tibet, was made into biochars (BC1, BC2 and BC3) by pyrolysis under different conditions, and the better biochar was modified by FeCl(2) (Fe-BC3). The adsorption conditions were optimized to adsorb F and As in geothermal water. The results showed that BC3 can remove 90% F(−) and 20% As(V), which is the best effect of the three initial biochars. Fe-BC3 could remove 94% F(−) and 99.45% As(V) under the same conditions as BC3, which was an adsorbent dosage 10 g l(−1), pH 5–6 and temperature of 25°C. It was also demonstrated that the removal rate did not decrease at 80°C. A quasi-second-order kinetic model best described the adsorption behaviour of ions on the surface of the biochar. The maximum adsorption capacity of F(−) and As(V) on Fe-BC3 was 3.928 mg g(−1) and 2.926 mg g(−1), respectively. The features of Fe-BC3 were characterized by X-ray diffraction, Fourier transform infrared, Brunauer–Emmett–Teller, energy-dispersive spectrometer and scanning electron microscopy to understand the adsorption process. |
format | Online Article Text |
id | pubmed-6281945 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-62819452018-12-18 Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent Chunhui, Luo Jin, Tian Puli, Zhu Bin, Zhou Duo, Bu Xuebin, Lu R Soc Open Sci Chemistry Fluoride (F) and arsenic (As) are two typical and harmful elements that are found in high concentrations in geothermal water in Tibet. In this work, yak dung, an abundant source of biomass energy in Tibet, was made into biochars (BC1, BC2 and BC3) by pyrolysis under different conditions, and the better biochar was modified by FeCl(2) (Fe-BC3). The adsorption conditions were optimized to adsorb F and As in geothermal water. The results showed that BC3 can remove 90% F(−) and 20% As(V), which is the best effect of the three initial biochars. Fe-BC3 could remove 94% F(−) and 99.45% As(V) under the same conditions as BC3, which was an adsorbent dosage 10 g l(−1), pH 5–6 and temperature of 25°C. It was also demonstrated that the removal rate did not decrease at 80°C. A quasi-second-order kinetic model best described the adsorption behaviour of ions on the surface of the biochar. The maximum adsorption capacity of F(−) and As(V) on Fe-BC3 was 3.928 mg g(−1) and 2.926 mg g(−1), respectively. The features of Fe-BC3 were characterized by X-ray diffraction, Fourier transform infrared, Brunauer–Emmett–Teller, energy-dispersive spectrometer and scanning electron microscopy to understand the adsorption process. The Royal Society 2018-11-21 /pmc/articles/PMC6281945/ /pubmed/30564414 http://dx.doi.org/10.1098/rsos.181266 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Chemistry Chunhui, Luo Jin, Tian Puli, Zhu Bin, Zhou Duo, Bu Xuebin, Lu Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title | Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title_full | Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title_fullStr | Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title_full_unstemmed | Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title_short | Simultaneous removal of fluoride and arsenic in geothermal water in Tibet using modified yak dung biochar as an adsorbent |
title_sort | simultaneous removal of fluoride and arsenic in geothermal water in tibet using modified yak dung biochar as an adsorbent |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6281945/ https://www.ncbi.nlm.nih.gov/pubmed/30564414 http://dx.doi.org/10.1098/rsos.181266 |
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