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Removal of arsenic from water using smectite rich clay soil : insight from adsorption kinetics and adsorption isotherms
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gitari Ndung’u |
| Copyright Year | 2017 |
| Abstract | This study evaluates the applicability of smectite rich clay soils in arsenic removal. The mineralogical and chemical composition of the clay soils were examined using x-ray diffraction (XRD) and X-ray fluorescence (XRF) respectively. Batch experiments were used to evaluate the adsorption kinetics, isotherms and the effect of pH on As(III) and As(V) adsorption. The results showed that the As(III) data fitted well to pseudo second order of reaction kinetics while As(V) adsorption data fitted well to pseudo first order of reaction. Isotherm data was described by the Freundlich adsorption isotherm model. The adsorption of both As species was found to be affected by the solution pH. Maximum percentage of removal was found to be 53.8% at pH 6 for As(V) and 52.9% for As(III) at pH 8. It was concluded that smectite rich clay soils can be used for arsenic remediation from water. The study recommended further studies to enhance adsorptive properties of smectite rich clay soils in arsenic removal. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cest.gnest.org/sites/default/files/presentation_file_list/cest2017_01269_poster_paper.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
