DSpace
 

iRepository at Perpustakaan UniMAP >
Journal Articles >
School of Environmental Engineering (Articles) >

Please use this identifier to cite or link to this item: http://dspace.unimap.edu.my:80/xmlui/handle/123456789/12163

Title: Adsorption and toxicity of heavy metals on activated sludge
Authors: Soon-An, Ong
Toorisaka, Eiichi
Hirata, Makoto
Hano, Tadashi
???metadata.dc.contributor.url???: ongsoonan@yahoo.com
Keywords: Acute toxicity;Adsorption capacity;Biomass;Isotherms;Specific oxygen uptake rate
Issue Date: Sep-2010
Publisher: Science Society of Thailand
Citation: ScienceAsia, vol. 36(3), 2010, pages 204–209
Abstract: 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.
Description: Link to publisher's homepage http://www.scisoc.or.th/
URI: http://www.scienceasia.org/2010.36.n3/scias36_204.pdf
http://hdl.handle.net/123456789/12163
ISSN: 1513-1874
Appears in Collections:School of Environmental Engineering (Articles)

Files in This Item:

File Description SizeFormat
adsortion and toxicity of heavy metals.pdf262.44 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! Perpustakaan Tuanku syed Faizuddin Putra, Kampus Pauh Putra, Universiti Malaysia Perlis, 02600, Arau Perlis
TEL: +604-9885420 | FAX: +604-9885405 | EMAIL: rujukan@unimap.edu.my Feedback