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Experimental and Numerical Modeling Studies of Arsenic Removal with Wood Ash from Aqueous Streams
Author(s) -
Rahman Mohammod H.,
Wasiuddin Nazimuddin M.,
Islam M Rafiqul
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820512
Subject(s) - arsenic , adsorption , aqueous solution , chemistry , streams , wood ash , environmental chemistry , organic chemistry , computer network , computer science
Most of the arsenic removal processes are not cost‐effective and/or not efficient in removing As (III). In this research, it was found that Maple wood ash has the potential to adsorb both As (III) and As (V) from contaminated aqueous streams at low concentration levels without any chemical treatment. Static tests showed up to 80% arsenic removal and in various dynamic column tests the arsenic concentration was reduced from 500 ppb to lower than 5ppb. Finally, the ash column was modeled using the surface excess theory. The identified model significantly facilitates practical design of arsenic adsorption system.