Inorganic arsenic species removal from water using bone char: A detailed study on adsorption kinetic and isotherm models using error functions analysis
Article
Article Title | Inorganic arsenic species removal from water using bone char: A detailed study on adsorption kinetic and isotherm models using error functions analysis |
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ERA Journal ID | 4682 |
Article Category | Article |
Authors | Alkurdi, Susan S. A., Al-juboori, Raed A., Bundschuh, Jochen, Bowtell, Les and Marchuk, Alla |
Journal Title | Journal of Hazardous Materials |
Journal Citation | 405 |
Article Number | 124112 |
Number of Pages | 14 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0304-3894 |
1873-3336 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jhazmat.2020.124112 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0304389420321026 |
Abstract | The removal of inorganic arsenic (As) species from water using bone char pyrolyzed at 900 °C was investigated. Results revealed that the Sips model resulted in the best As(III) experimental data fit, while As(V) data were best represented by the Langmuir model. The adsorption rate and mechanisms of both As species were investigated using kinetic and diffusional models, respectively. At low As(III) and As(V) concentrations of 0.5 and 2.5 mg/L, the removal was due to intra-particle interactions and pore diffusion following Pseudo-first-order kinetics. However, at higher concentrations of 5 and 10 mg/L, the pore diffusion mechanism was ineffective, and the adsorption was best described by Pseudo-second-order and Elovich models. The goodness of the fit of linearized and nonlinear forms of all models against experimental data was thoroughly tested using error function analysis. Nonlinear regressions produced lower error values, so they were utilized to calculate the parameters of the models. The changes in bone char surface chemistry were examined using FTIR and Energy-dispersive X-ray spectroscopy (EDS). Arsenic oxide and complexes with metals were the confirmed immobilized forms of As on the bone-char surface. To the authors’ knowledge, this study is the first attempt at As(III) adsorption analysis using bone char. |
Keywords | Arsenic; Kinetic models; Isotherm models; Bone char |
ANZSRC Field of Research 2020 | 400410. Wastewater treatment processes |
340505. Physical organic chemistry | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Faculty of Health, Engineering and Sciences |
Northern Technical University, Iraq | |
Aalto University, Finland | |
Institute for Life Sciences and the Environment (Operations) | |
School of Engineering | |
Centre for Sustainable Agricultural Systems |
https://research.usq.edu.au/item/v891w/inorganic-arsenic-species-removal-from-water-using-bone-char-a-detailed-study-on-adsorption-kinetic-and-isotherm-models-using-error-functions-analysis
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