Simultaneous arsenic and fluoride removal from synthetic and real groundwater by electrocoagulation process: Parametric and cost evaluation

Thakur, Lokendra Singh; Mondal, Prasenjit

doi:10.1016/j.jenvman.2016.12.053

Cited by 157 publications

(44 citation statements)

References 50 publications

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“…5 . To observe the energy consumption and operating cost throughout the experiments following equations were adapted from literature [3] , [4] , [5] , [6] , [7] and the results are tabulated in Table 3 .

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Section: Datamentioning

confidence: 99%

Data on treatment of sewage wastewater by electrocoagulation using punched aluminum electrode and characterization of generated sludge

2018

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The electrocoagulation setup must be optimized in order to design an economically feasible process. Therefore, in this work, the effect of the punched aluminum electrode on the performance of the electrocoagulation (EC) has been investigated. A series of experiments were performed for treatment of sewage wastewater using plane electrode and compare with punched electrodes. Effect of contact time, voltage, electrode spacing and stirring speed has been optimized for removal of Biochemical oxygen demand (BOD) and Total dissolved solids (TDS). It was observed that the performance of electrocoagulation process increased using punched electrode. Also, the less operating cost noticed in punched electrode as compared to a plane electrode for (70–80%) removal of BOD and TDS. These data would be useful in designing of an EC reactor to obtain high removal efficiency at low energy consumption.

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Section: Datamentioning

confidence: 99%

Data on treatment of sewage wastewater by electrocoagulation using punched aluminum electrode and characterization of generated sludge

2018

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“…However, each of these methods presents its drawbacks, such as a long disposal time, the use of dangerous and expensive reagents 49 . Among these methods, adsorption is mentioned as the most efficient and widely used fundamental approach in water defluoridation processes 50 . It is characterized by its simplicity and availability of a wide variety of adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of aluminum-based adsorbent and application in fluoride removal from aqueous solution

2020

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A novel adsorbent was obtained by a facile precipitation method and was used for fluoride removal from aqueous solution. Mineralogical and physicochemical characterization of the adsorbent was carried out by X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), Energy Dispersive X-Ray attached to Scanning Electron Microscopy (SEM-EDX), BET Specific Surface Area(SSAN2BET) analysis and Fourier-Transform Infrared Spectrometry (FTIR). The effect of various operational parameters such as contact time, initial fluoride concentration, (20-160 mg L-1) adsorbent dose (1-6 g L-1) and initial pH solution (3-11) was evaluated in batch procedures at room temperature (25±2°C). The results of the batch adsorption experiments proved that 24 h of contact time was sufficient for attaining equilibrium. The maximum wastewater defluoridation (84.91%) was obtained for 40 mg L-1 and 3 g L-1 of initial fluoride concentration and adsorbent dose, respectively. It appears that there was no significant effect on the F- removal over a wide range of pH 3-11. Kinetic studies revealed that fluoride adsorption fitted well to pseudo-second-order. The adsorption isotherm of fluoride sorption indicated that the maximum adsorption capacity was noted to be 43.29 mg g-1. Batch adsorption data was better described by Langmuir isotherm confirming monolayer adsorption with homogenous distribution of active sites and without interaction between adsorbed molecules. The obtained results indicated that the ion exchange is probably the main mechanism involved in the F- adsorption by the aluminium-based adsorbent.

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“…A wide range of industrial enterprises are involved in F-containing wastewater generation, and a large amount of F-containing wastewater is exported every year [11][12][13][14]. The fluoride concentration in industrial wastewater generally reaches up to hundreds or even thousands of milligrams of per liter and exceeds drastically the WHO (World Health Organization) guideline value of 1.5 mg/L in drinking water [15,16].…”

Section: Introductionmentioning

confidence: 99%

Precipitation Methods Using Calcium-Containing Ores for Fluoride Removal in Wastewater

et al. 2019

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F-containing wastewater does great harm to human health and the ecological environment and thus needs to be treated efficiently. In this paper, the new calcium-containing precipitant calcite and aided precipitant fluorite were adopted to purify F-containing wastewater. Relevant reaction conditions, such as reaction time, oscillation rate, dosage of hydrochloric acid, calcite dosage and the assisting sedimentation performance of fluorite, and action mechanism are analyzed. The experiment showed that the removal rate of fluoride in simulated wastewater reached 96.20%, when the reaction time, the dosage of calcite, the dosage of 5% dilute hydrochloric acid, and the oscillation rate was 30 min, 2 g/L, 21.76 g/L, and 160 r/min, respectively. Moreover, the removal rate of fluoride in the actual F-containing smelting wastewater reaches approximately 95% under the optimum condition of calcite dosage of 12 g/L, reaction time of 30 min, and oscillation rate of 160 r/min. The addition of fluorite significantly improves the sedimentation performance of the reactive precipitates. The experimental results showed that calcite and fluorite can effectively reduce the concentration of fluoride ions in F-containing wastewater and solve the problem of slow sedimentation of reactive precipitates.

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Simultaneous arsenic and fluoride removal from synthetic and real groundwater by electrocoagulation process: Parametric and cost evaluation

Cited by 157 publications

References 50 publications

Data on treatment of sewage wastewater by electrocoagulation using punched aluminum electrode and characterization of generated sludge

Data on treatment of sewage wastewater by electrocoagulation using punched aluminum electrode and characterization of generated sludge

Synthesis and characterization of aluminum-based adsorbent and application in fluoride removal from aqueous solution

Precipitation Methods Using Calcium-Containing Ores for Fluoride Removal in Wastewater

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