KINETIC STUDY OF BIOSORPTION OF ARSENIC FROM SOIL USING MICROORGANISMS
Keywords:Arsenic, contaminated soils, biosorption, sorption kinetics, microorganisms.
This work studied the kinetics of biosorption of arsenic (As) from polluted soils using two bacteria [Proteus mirabilis (P. mirabilis) and Bacillus subtilis (B. subtilis)]. The bacteria obtained from the soils were cultured and utilized to treat the arsenic polluted soils through the process of batch biosorption experiment. The experimental data were fitted with four kinetic models (Pseudo-first order, pseuodo-second order, Elovich and the intra-particle diffusion); and judgement on models performance was made using the values of the models’ coefficient of determination (R2).The four models tested were adequate for describing the biosorption kinetics but the leading performance of the intraparticle diffusion model with R2 of 0.991 for sorption by P. mirabilis and 0.972 for sorption by B. subtilis proved the diffusion process to be the rate-limiting step. This indicated that the systems were transport controlled.
How to Cite
The contents of the articles are the sole opinion of the author(s) and not of NIJOTECH.
NIJOTECH allows open access for distribution of the published articles in any media so long as whole (not part) of articles are distributed.
A copyright and statement of originality documents will need to be filled out clearly and signed prior to publication of an accepted article. The Copyright form can be downloaded from http://nijotech.com/downloads/COPYRIGHT%20FORM.pdf while the Statement of Originality is in http://nijotech.com/downloads/Statement%20of%20Originality.pdf
For articles that were developed from funded research, a clear acknowledgement of such support should be mentioned in the article with relevant references. Authors are expected to provide complete information on the sponsorship and intellectual property rights of the article together with all exceptions.
It is forbidden to publish the same research report in more than one journal.