Modelling the adsorption of fluoride onto activated alumina in the presence of other ions

Samrat, M.V.V. Naga; Gandhi, K. S.; Rao, K. Uma

doi:10.1016/j.jece.2020.103934

Cited by 9 publications

(1 citation statement)

References 51 publications

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“…In acidic conditions, most of the defluorination rate was contributed by the coprecipitation of highly polymerized Al and F − , while under neutral and alkaline conditions, the main defluorination rate was provided with hydrogen bonding and ion exchange together with coprecipitation. Naga Samrat et al 18 studied the adsorption of fluoride by activated alumina in the presence of other ions and established a prediction model. The model took into account the speciation reactions and the presence of other ions and was generally at low F concentrations.…”

Section: Introductionmentioning

confidence: 99%

Fluoride Removal from Wastewater by Natural and Modified Gibbsite

et al. 2020

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A low-cost adsorbent produced from natural and modified gibbsite was evaluated for defluoridation. Batch experiments were used to explore the best fluorine removal conditions. The experimental results showed the best conditions of removing fluorine as follows: reaction temperature was controlled at 298 K, the dosage of gibbsite added was 40 g/L, and the contact reaction time was 120 min. The concentration of fluorine ions in the wastewater treated by natural gibbsite decreased from 30 to 9.29 mg/L, and when treated by La 3+ -modified gibbsite, it reduced from 30 to 3.08 mg/L. The performances of natural and modified gibbsite were examined with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray analysis (EDX), and scanning electron microscopy (SEM) analyses. The pseudo-second-order kinetic model can well describe the process of defluorination of natural and modified gibbsite.

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Section: Introductionmentioning

confidence: 99%