Adsorption of rose Bengal dye from aqueous solution by amberlite Ira-938 resin: kinetics, isotherms, and thermodynamic studies

Naushad, Mu.; ALOthman, Zeid A.; Awual, Md. Rabiul; Alfadul, Sulaiman M.; Ahamad, Tansir

doi:10.1080/19443994.2015.1060169

Cited by 210 publications

(38 citation statements)

References 47 publications

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“…Langmuir constant K L also decreased indicating that affinity between adsorbent and adsorbate decreased with increase in temperature. The R L values in the range 0<RL<1 (figures S3a and b) and the Freundlich intensity parameter in the range 1<1/n<10 (table 1) indicates that the adsorption of both CR and IC on CHCA is favourable at the concentration and temperature range studied [56]. The adsorption capacities obtained in this study was compared with various adsorbents reported in the literature for the removal of CR and IC and is summarized in tables S1 and S2 respectively.…”

Section: Adsorption Isothermsmentioning

confidence: 71%

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Murthy

Gowrishankar

Chandraprabha

et al. 2020

Mater. Res. Express

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Solution combustion synthesis of calcium aluminate (CaAl 2 O 4 ) nanocomposite using coffee husk extract and its adsorption capacity for removal of Congo red (CR) and Indigo carmine (IC) are reported. Physiochemical properties of adsorbent were studied by PXRD, SEM, TEM and point of zero charge. Batch adsorption studies were conducted to study the effect of adsorbent dosage, pH, contact time, initial dye concentration and temperature on adsorption efficiency of coffee husk derived calcium aluminate nanocomposite (CHCA). Among the isotherms used, Langmuir model explained best the equilibrium data and the maximum monolayer adsorption capacity was found to be 377 and 135 mg/g for CR and IC, respectively. Mass transfer analysis indicated adsorptive removal of dyes was controlled by both external and internal diffusion. Pseudo-first-order model fitted best with experimental kinetic data and adsorption efficiency increased with an increase in the initial bulk concentration of CR and IC. Thermodynamic analysis indicated that adsorption of CR and IC on CHCA is feasible, spontaneous and exothermic in nature. The magnitude of enthalpy and heat of adsorption suggested that the adsorption is physical in nature. The present study explores the potential of coffee husk extract, an agro-based bio-waste, as a novel and eco-friendly fuel in the synthesis of CHCA and the synthesised nanocomposite as a potential adsorbent for the removal of synthetic dyes.

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Section: Adsorption Isothermsmentioning

confidence: 71%

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Murthy

Gowrishankar

Chandraprabha

et al. 2020

Mater. Res. Express

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“…The positive values of ΔH° evidencing the endothermic process and indicating the chemisorptions occurred, while the physisorption is always exothermic. Moreover, the positive value of ΔS° indicates the increases in randomness during the adsorption [53,54].…”

Section: Thermodynamics Of Adsorptionmentioning

confidence: 99%

Adsorptive and photocatalytic removal of carcinogenic methylene blue dye by SnO2 nanorods: an equilibrium, kinetic and thermodynamics exploration

et al. 2020

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The present study reports a simple co-precipitation approach for the synthesis of SnO 2 nanorods. The SnO 2 nanorods were characterized by XRD, SEM, TEM, EDAX, SAED, and FTIR techniques, to examine their structural, morphological, functional group, and elemental properties. The findings of the SEM and TEM reveal the nanorod like morphology. For the adsorptive and photocatalytic removal of methylene blue dye from their aqueous solution the synthesized SnO 2 nanorods have been used. The effect on adsorptive and the photocatalytic removal capability of SnO 2 nanorods was examined by optimizing the various parameters such as pH, initial dye concentration, contact time and catalyst dose. Tha maximum adsorptive and photocatalytic removal of MB up to the 66% and 94% were obtained at pH = 7 and pH = 2, respectively. Besides, experimental adsorption results were used for the exploration of kinetics and adsorption isotherm (Langmuir and Freundlich), which shows that methylene blue adsorption over SnO 2 nanorods follows the pseudo-second-order kinetics with the rate constant K 2 is 1.1 × 10 −1 (g/mg/min) and obeys the Langmuir isotherm. However, the thermodynamic parameters were studied, indicating that adsorption is spontaneous and favorable. The adsorptive removal is an endothermic process and pointing towards the chemisorptions nature of the process.

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“…1) and pseudo-second (Eq. 2) order kinetics (Lin and Wang, 2009;Simonin, 2016, Naushad et al, 2016Tan and Hameed, 2017). The pseudo-fi rst order kinetic equation, originally described by Lagergren, assumes that the adsorption sites occupancy rate is proportional to the number of vacant sites.…”

Section: Theoreticalmentioning

confidence: 99%

Use of zeolites for macronutrients removal from wastewater

Urminská

Derco

Zakhar

et al. 2019

Acta Chimica Slovaca

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Natural or synthetic zeolites have unique physical, chemical and structural properties that predetermine their use in many processes, including wastewater treatment. This study presents the results of our preliminary research in the field of nitrogen and phosphorus removal using adsorption and adsorptive ozonation with natural and modified zeolites. Iron-modified zeolite was the most efficient for the removal of ammonium nitrogen by adsorption. Phosphorus removal efficiency using adsorption was relatively low and natural zeolite was not suitable for the phosphorus removal at all. Ozone had no significant impact on the removal efficiency. Regeneration of loaded zeolites with ozone has also been studied. This method was partly efficient but it needs be further examined.

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Adsorption of rose Bengal dye from aqueous solution by amberlite Ira-938 resin: kinetics, isotherms, and thermodynamic studies

Cited by 210 publications

References 47 publications

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Solution combustion synthesis of calcium aluminate nanocomposite using coffee husk extract as green fuel and its application in adsorptive amputation of anionic dyes

Adsorptive and photocatalytic removal of carcinogenic methylene blue dye by SnO2 nanorods: an equilibrium, kinetic and thermodynamics exploration

Use of zeolites for macronutrients removal from wastewater

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