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Okolo, B. I.
Department of Chemical Engineering Michael Okpara University, Umudike, Nigeria
Awak, E.
Department of Chemical Engineering Michael Okpara University, Umudike, Nigeria
Adindu, A.
Department of Chemical Engineering Michael Okpara University, Umudike, Nigeria
Ukandu, O.
Department of Chemical Engineering Michael Okpara University, Umudike, Nigeria
ABSTRACT
This study
investigates the adsorptive removal of Cr(VI) ions from aqueous solution using chemically
modified Africa elemi seeds activated carbon (AESAC). The adsorbent prepared
was characterized using FTIR and SEM. Box Behnkin design (BBD) in response
surface methodology (RSM) was used to optimize the adsorption process. The
effect of three variables: pH, biosorbent dosage and contact time and their
effects on percentage removal were investigated. Based on BBD design, quadratic
model and two factor interaction (2FI) were developed. Analysis of variance
(ANOVA) was used to judge the adequacy of the model. The optimum conditions of
Cr(VI) removal using AESAC are pH (2.0), biosorbent dosage (20mg) and contact
time (70min) respectively. The percentage of Cr(VI) removal obtained was
98.64%. The model prediction was in good agreement with experimental result and
AESAC was found to be effective in removing Cr(VI) from aqueous solution.
Keywords: Africa elemi seed, Box-Behnken Design, Response surface methodology, adsorption , chromium (VI)
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Conference Code
IECON2019
Conference Title
ENGINEERING FOR SUSTAINABLE ECONOMIC DIVERSIFICATION, FOOD AND NATIONAL SECURITY
ISBN
978-978-53175-8-9
Date Published
Friday, September 20, 2019
Conference Date
2nd - 4th September, 2019
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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