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Adsorption and toxicity of heavy metals on activated sludge

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Main Authors: Soon-An, Ong, Toorisaka, Eiichi, Hirata, Makoto, Hano, Tadashi
Other Authors: ongsoonan@yahoo.com
Format: Article
Language:English
Published: Science Society of Thailand 2011
Subjects:
Acute toxicity
Adsorption capacity
Biomass
Isotherms
Specific oxygen uptake rate
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/12163
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spelling my.unimap-121632011-05-31T02:22:24Z Adsorption and toxicity of heavy metals on activated sludge Soon-An, Ong Toorisaka, Eiichi Hirata, Makoto Hano, Tadashi ongsoonan@yahoo.com Acute toxicity Adsorption capacity Biomass Isotherms Specific oxygen uptake rate Link to publisher's homepage http://www.scisoc.or.th/ The adsorption of Cu, Cd, Ni, Zn, and Cr from synthetic solutions on powdered activated carbon (PAC), activated sludge, and dried sludge were investigated under laboratory conditions to assess its ability to remove heavy metals. The adsorption efficiency increased rapidly within the first 30 min and then slowed down as it approached a steady state after 5 h of contact time. The results showed that activated sludge and PAC had a higher adsorption capacity than dried sludge. However, PAC showed a better adsorption capacity for Cu, Zn, and Ni than activated sludge. The maximum adsorption capacity, as quantified by the Langmuir parameter Q for activated sludge was 44, 30, 24, 23, and 18 mg/g for Cu, Ni, Cd, Cr, and Zn, respectively. In the case of dried sludge, the respective values of Q were 20, 13, 11, 3, and 10 mg/g. The acute toxicity of these five heavy metals to the activated sludge microorganisms was determined on the basis of the reduction in the specific oxygen uptake rate (SOUR). The results obtained from the SOUR measurements indicated a decreasing toxicity scale, Cu > Cd > Ni ' Cr > Zn on activated sludge microorganisms. 2011-05-31T02:22:23Z 2011-05-31T02:22:23Z 2010-09 Article ScienceAsia, vol. 36(3), 2010, pages 204–209 1513-1874 http://www.scienceasia.org/2010.36.n3/scias36_204.pdf http://hdl.handle.net/123456789/12163 en Science Society of Thailand
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Acute toxicity
Adsorption capacity
Biomass
Isotherms
Specific oxygen uptake rate
spellingShingle Acute toxicity
Adsorption capacity
Biomass
Isotherms
Specific oxygen uptake rate
Soon-An, Ong
Toorisaka, Eiichi
Hirata, Makoto
Hano, Tadashi
Adsorption and toxicity of heavy metals on activated sludge
description Link to publisher's homepage http://www.scisoc.or.th/
author2 ongsoonan@yahoo.com
author_facet ongsoonan@yahoo.com
Soon-An, Ong
Toorisaka, Eiichi
Hirata, Makoto
Hano, Tadashi
format Article
author Soon-An, Ong
Toorisaka, Eiichi
Hirata, Makoto
Hano, Tadashi
author_sort Soon-An, Ong
title Adsorption and toxicity of heavy metals on activated sludge
title_short Adsorption and toxicity of heavy metals on activated sludge
title_full Adsorption and toxicity of heavy metals on activated sludge
title_fullStr Adsorption and toxicity of heavy metals on activated sludge
title_full_unstemmed Adsorption and toxicity of heavy metals on activated sludge
title_sort adsorption and toxicity of heavy metals on activated sludge
publisher Science Society of Thailand
publishDate 2011
url http://dspace.unimap.edu.my/xmlui/handle/123456789/12163
_version_ 1643789927512539136
score 13.222552

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