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Arsenic(III) Immobilization on Rice Husk

A number of large aquifers in various parts of the world have been identified with contamination by arsenic. Long-term exposure to arsenic in drinking water causes cancer of the skin, lungs, urinary bladder and kidney, as well as skin pigmentation and hyperkeratosis. Arsenic occurs in groundwater in...

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Main Authors: Chaudhuri, M., Mohammed, M. A.
Format: Conference or Workshop Item
Published: 2011
Subjects:
TD Environmental technology. Sanitary engineering
Online Access:http://eprints.utp.edu.my/6691/1/01_Malay_Chaudhuri.doc
http://uhsb.uthm.edu.my/isasm2011
http://eprints.utp.edu.my/6691/
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spelling my.utp.eprints.66912014-03-28T09:51:12Z Arsenic(III) Immobilization on Rice Husk Chaudhuri, M. Mohammed, M. A. TD Environmental technology. Sanitary engineering A number of large aquifers in various parts of the world have been identified with contamination by arsenic. Long-term exposure to arsenic in drinking water causes cancer of the skin, lungs, urinary bladder and kidney, as well as skin pigmentation and hyperkeratosis. Arsenic occurs in groundwater in two valence states, as trivalent arsenite [As(III)] and pentavalent arsenate [As(V)]. As(III) is more toxic and more difficult to remove from water by adsorption on activated alumina. In this study, immobilization (adsorption) of As(III) by quaternized rice husk was examined. Batch adsorption test showed that extent of adsorption was dependent on pH, As (III) concentration, contact time and rice husk dose. Maximum adsorption occurred at pH 7-8, and equilibrium adsorption was attained in 2 h. Equilibrium adsorption data were described by the Langmuir and Freundlich isotherm models. According to the Langmuir isotherm, adsorption capacity of quaternized rice husk is 0.775 mg As(III)/g, which is 4.3x higher than that (0.180 mg As(III)/g) of activated alumina. Quaternized rice husk is a potentially useful adsorbent for removing arsenic from groundwater. 2011-11-01 Conference or Workshop Item PeerReviewed application/msword http://eprints.utp.edu.my/6691/1/01_Malay_Chaudhuri.doc http://uhsb.uthm.edu.my/isasm2011 Chaudhuri, M. and Mohammed, M. A. (2011) Arsenic(III) Immobilization on Rice Husk. In: International Seminar on The Application of Science & Mathematics (ISASM2011), 1-3 November, 2011, Kuala Lumpur. http://eprints.utp.edu.my/6691/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
topic TD Environmental technology. Sanitary engineering
spellingShingle TD Environmental technology. Sanitary engineering
Chaudhuri, M.
Mohammed, M. A.
Arsenic(III) Immobilization on Rice Husk
description A number of large aquifers in various parts of the world have been identified with contamination by arsenic. Long-term exposure to arsenic in drinking water causes cancer of the skin, lungs, urinary bladder and kidney, as well as skin pigmentation and hyperkeratosis. Arsenic occurs in groundwater in two valence states, as trivalent arsenite [As(III)] and pentavalent arsenate [As(V)]. As(III) is more toxic and more difficult to remove from water by adsorption on activated alumina. In this study, immobilization (adsorption) of As(III) by quaternized rice husk was examined. Batch adsorption test showed that extent of adsorption was dependent on pH, As (III) concentration, contact time and rice husk dose. Maximum adsorption occurred at pH 7-8, and equilibrium adsorption was attained in 2 h. Equilibrium adsorption data were described by the Langmuir and Freundlich isotherm models. According to the Langmuir isotherm, adsorption capacity of quaternized rice husk is 0.775 mg As(III)/g, which is 4.3x higher than that (0.180 mg As(III)/g) of activated alumina. Quaternized rice husk is a potentially useful adsorbent for removing arsenic from groundwater.
format Conference or Workshop Item
author Chaudhuri, M.
Mohammed, M. A.
author_facet Chaudhuri, M.
Mohammed, M. A.
author_sort Chaudhuri, M.
title Arsenic(III) Immobilization on Rice Husk
title_short Arsenic(III) Immobilization on Rice Husk
title_full Arsenic(III) Immobilization on Rice Husk
title_fullStr Arsenic(III) Immobilization on Rice Husk
title_full_unstemmed Arsenic(III) Immobilization on Rice Husk
title_sort arsenic(iii) immobilization on rice husk
publishDate 2011
url http://eprints.utp.edu.my/6691/1/01_Malay_Chaudhuri.doc
http://uhsb.uthm.edu.my/isasm2011
http://eprints.utp.edu.my/6691/
_version_ 1738655512536285184
score 13.211869

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