دورية
Arsenic Adsorption by TiO2Nanoparticles Under Conditions Similar to Groundwater: Batch and Column Studies
| العنوان: | Arsenic Adsorption by TiO2Nanoparticles Under Conditions Similar to Groundwater: Batch and Column Studies |
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| المؤلفون: | Nazari, Atieh, Nakhaei, Mohammad, Yari, Ahmad Reza |
| المصدر: | International Journal of Environmental Research; February 2021, Vol. 15 Issue: 1 p79-91, 13p |
| مستخلص: | Nano-sized TiO2particles containing anatase and rutile were applied to arsenic removal from water in natural groundwater conditions in the batch and column experiments. Arsenic concentrations were 200 µg L-1and the pH range was 6–8.5 (similar to groundwater conditions). The results showed that anatase and rutile could adsorb 95.5% and 63.5% of arsenic in a solution after 60 min, respectively. In both adsorbents, arsenic adsorption was increased by increasing the adsorbent concentration. Increasing pH results increased adsorption in rutile more than anatase. The maximum adsorption capacity of 2.58 mg g-1and 1.86 mg g-1were calculated for anatase and rutile, respectively at the adsorbent concentration of 3 g L-1. Isotherm studies showed Freundlich model was more valid to the empirical adsorption data for both nanoparticles. The kinetics of the adsorption processes fitted well the pseudo-first-order adsorption model. To investigate the dynamic sorption, column study was carried out with fine and coarse silica sand porous media. According to the batch experiments, only anatase nanoparticles were injected into the column as an adsorbent at different doses. Breakthrough curves (BTC) showed the best efficiency of arsenic removal can be obtained by an adsorbent dose of 8 g L-1in the fine sand column. |
| قاعدة البيانات: | Supplemental Index |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 17356865 20082304 |
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| DOI: | 10.1007/s41742-020-00298-7 |