| Removal of Arsenic(V) from Water Resources using Aluminum-Coated Pumice |
| کد مقاله : 1225-ERTC |
| نویسندگان: |
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Masoomeh Heidari * Department of Environment, Faculty of Agriculture and Natural Resources, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran |
| چکیده مقاله: |
| ABSTRACT: Alum-coated-pumice has been suggested as an adsorbent to As(V) removal from drinking water. Pumice was collected from pumice mine and coated by alum. The features of the adsorbent coating layer were observed by X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM).The effects of various parameters such as adsorbent doses, pH, contact time and arsenate initial concentration in arsenic adsorption and achieving high removal efficiency were studied. The results showed that more than 98% of As (V) was removed by 10 g/L of the adsorbent with 250 µg/L concentrations, at pH 7 and in 160 minutes. The data achieved from the kinetic studies were processed by kinetic models of pseudo-first-order and pseudo-second-order .The results indicated that the pseudo-second-order model could describe the adsorption of As (V) by pumice coated with alum (R2>0.92). According to achieved results, it was defined that aluminum-coated pumice not only was an inexpensive absorbent, but also a quite effective factor in removal of As (V) from water resources. |
| کلیدواژه ها: |
| Arsenic, Water resources; Aluminum-coated pumice; Kinetics |
| وضعیت : مقاله برای ارائه به صورت پوستر پذیرفته شده است |
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