Removal of Fluoride from Aqueous Solution Using Aluminum-Impregnated Chitosan Biopolymer

Swain, S. K.; Dey, R. K.; Islam, Mahamudur; Patel, Raj Kishore; Jha, Usha; Patnaik, Tanushree; Airoldi, Cláudio

doi:10.1080/01496390902881212

Cited by 83 publications

(51 citation statements)

References 22 publications

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“…The recorded values of E with respect to the variation of DCH concentration and spacing between electrodes are 7.905 kJ mol -1 and 15.813 kJ mol -1 respectively. As the values are in the range of 8 -16 kJ mol -1 , it may be suggested that the nature of bonding is governed by chemical forces (Swain et al, 2009). The present sorption system fits well with the DKR model and supported by the R 2 values (Fig.…”

Section: Isotherm Model: Dubinin -Kaganer -Radushkevich (Dkr) Modelsupporting

confidence: 74%

Electro-coagulation coupled electro-flotation process: Feasible choice in doxycycline removal from pharmaceutical effluents

Zaidi

Chaabane

Sivasankar³

et al. 2019

Arabian Journal of Chemistry

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Electrochemical treatment involving a coupled coagulation and floatation was performed in the removal of Doxycycline Hyclate (DCH) from aqueous solutions. All the experiments were carried out in an electrochemical reactor of 1.5 L which contained aluminium electrodes as cathode and anode. The removal of doxycycline hyclate (DCH) species by EC/EF was determined as a function of electrolysis time, pH, current intensity, flow rate and DCH concentration. From the observed results, it was corroborated that the DCH removal through the EC/EF process was excellent. The effective contribution from initial pH (7.03) and current intensity (5.39 mA cm -2 ) was very much remarkable and well apparent from flocs of good buoyancy. The removal of DCH was inversely proportional to spacing between electrodes (SBE) and circulating flow rate in the presence of the supporting NaCl electrolyte of 1 g L -1 . It was also highly promoted by the addition of NaCl in comparison to NaNO 3 and KCl to the electrolytic system. The compliance of four kinetic models was verified with DCH removal system. The free energy values from DKR model suggested the nature of bonding by chemical forces. Characterization by FTIR, SEM and XRD interpreted the assignments of various functional groups, surface morphology and crystalline incorporated amorphous nature, respectively of electro -generated flocs. The current efficiency and specific electrical energy consumption at optimized conditions of the EC/EF system were calculated.

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Section: Isotherm Model: Dubinin -Kaganer -Radushkevich (Dkr) Modelsupporting

confidence: 74%

Electro-coagulation coupled electro-flotation process: Feasible choice in doxycycline removal from pharmaceutical effluents

Zaidi

Chaabane

Sivasankar³

et al. 2019

Arabian Journal of Chemistry

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“…The identification of chitosan and chitosan derivatives has been carried out by different non destructive techniques (Table 1): X-ray diffraction (XRD) [46,48,49,66], scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX) [47,[66][67][68][69], Fourier transform infrared spectroscopy (FTIR) [44,45,48,49,70]. Excellent reviews on description and discussion of the different techniques mentioned above can be seen elsewhere [71][72][73].…”

Section: Characterization Of Chitosan and Chitosan Derivativesmentioning

confidence: 99%

“…Different mineral materials as hydroxyapatite, binary metal oxides, magnesia, hydrotalcite, alumina, rare earth metals, etc. have been supported on chitosan resulting in inorganic composites with high F removal capacity [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] etc.…”

mentioning

confidence: 99%

Fluoride removal from water by chitosan derivatives and composites: A review

Miretzky

Cirelli

2011

Journal of Fluorine Chemistry

240

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“…The positive entropy change (DS°) suggests the increase in randomness at solid-liquid interface. This may be attributed to the fact that the uptake of ions onto the surface of the adsorbent is accompanied by elimination of water molecule previously bonded to the surface of the adsorbent [44]. Thus uptake processes for both anions are entropically controlled.…”

Section: Thermodynamic Parameters Of Uptakementioning

confidence: 97%

Kinetics and thermodynamics of chromate and phosphate uptake by polypyrrole: batch and column studies

Hammud

Abbas

Al-khalili

2015

J Incl Phenom Macrocycl Chem

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Polypyrrole sorption performance for removal of phosphate and chromate anions from water was evaluated by batch and column studies. The uptake isotherms, kinetics, chromate recycling, and experimental conditions such as temperature, pH, and dosage were optimized. The uptake data fitted Freundlich isotherm model very well, and the removal process was found to be endothermic and spontaneous in nature. The results indicate that the removal of both anions is a physisorption process. The kinetic data were described better by the pseudo second-order kinetic model. The maximum uptake capacities for phosphate and chromate anions were 120 and 26 mg/g respectively. The uptake equilibrium for phosphate and chromate was attained in 120 and 60 min respectively. The solution pH showed insignificant effect on anions removal over a pH range from 2.0 to 10.0. Three well known column uptake models, Thomas, Yoon and Nelson and Yan et al., were used to analyze the experimental data of chromate removal from water by polypyrrole. Thomas model showed better fitting than other models. Polypyrrole was regenerated and reused by using 0.1 M HCl solution. This polymer is a promising sorbent than other materials for phosphate and chromate removal from wastewater.

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Removal of Fluoride from Aqueous Solution Using Aluminum-Impregnated Chitosan Biopolymer

Cited by 83 publications

References 22 publications

Electro-coagulation coupled electro-flotation process: Feasible choice in doxycycline removal from pharmaceutical effluents

Electro-coagulation coupled electro-flotation process: Feasible choice in doxycycline removal from pharmaceutical effluents

Fluoride removal from water by chitosan derivatives and composites: A review

Kinetics and thermodynamics of chromate and phosphate uptake by polypyrrole: batch and column studies

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