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标题：Fluoride removal from aqueous solution onto activated carbon of Catha edulis through the adsorption treatment technology
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作者：Jemal Fito ; Hanan Said ; Sisay Feleke 等
期刊名称：Environmental Systems Research
电子版ISSN：2193-2697
出版年度：2019
卷号：8
期号：1
页码：1-10
DOI：10.1186/s40068-019-0153-1
语种：English
出版社：Springer
摘要：AbstractBackgroundNowadays freshwater quality deterioration and quantity depletion are rapidly increasing across the globe. Especially fluoride polluted groundwater is causing a severe shortage of water supply and public health problem. Hence, this study was designed to investigate the performance of activated carbon produced from theCatha edulisstem for the removal of fluoride from aqueous solution. AC. edulisstem sample was collected from dumping sites of Addis Ababa City and its activation and carbonation processes were performed using H2SO4and a high temperature of 600 °C. The experimental study was designed to use a full factorial approach with a 33which were the three factors with the three levels, namely pH (2, 7 and 9), contact times (60, 90 and 120 min) and adsorbent doses (0.5 g, 1.0 g and 1.5 g in 100 mL) at the initial fluoride concentration 30 mg/L which resulted in 81 experimental runs in triplicates.ResultsThe calculated maximum adsorption capacity of 18 mg/g was found under the Langmuir isotherm, whereas the Freundlich model (R20.98) better fitted the experimental data, which indicated that the adsorption process was multilayer and cooperative. The maximum fluoride removal of 73% was observed at the optimum condition of adsorbent dose of 1.5 g in 100 mL contact time of 60 min and pH 2, whereas the predicted value of the fluoride removal of 69% was calculated under the same experimental condition. Fluoride removal was positive and strongly influenced by the adsorbent dose, whereas the adsorption pH was negatively and weakly impacted on removal.ConclusionsGenerally, the performance of activated carbon for the removal of fluoride from aqueous solution is promising. The study also indicated thatC. edulisactivated carbon is a potential candidate for water treatment technology.
关键词：KeywordsEnAdsorbentEnvironmental pollutionExperimental designFreshwaterPollutant removalWater treatment