Kinetics, isotherm, thermodynamic and bioperformance of defluoridation of water using praseodymium-modified chitosan

Kusrini, Eny; Paramesti, Shinta Nataya; Zulys, Agustino; Daud, Nur Zafirah A.; Usman, Anwar; Wilson, Lee D.; Sofyan, Nofrijon

doi:10.1016/j.jece.2019.103498

Cited by 20 publications

(6 citation statements)

References 58 publications

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“…In this sense, the higher temperature enhanced the mobility of the synthetic dye as well as disrupted the interactions between MB and functional groups of the PAT composites. The decrease in the Q e value at higher temperature has also been reported in the adsorption of many adsorbates on biosorbents [61,62]. Based on the K L values (see Table 2), K 0 e and ΔG 0 ads were calculated using Eq.…”

Section: The Effect Of Temperaturementioning

confidence: 84%

Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles

et al. 2021

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In the present study, pectin-alginate-titania (PAT) composites were synthesized and the adsorptive removal behavior of methylene blue (MB) from aqueous solution, as a model of synthetic organic effluents, onto the prepared PAT composites were investigated by monitoring the effect of contact time, initial MB concentration, and temperature. The adsorption isotherm data were fitted well with the Freundlich isotherm model, suggesting the surface heterogeneity of the PAT composites and that the MB adsorption occurred on the active sites on multilayer surface of the composites. The adsorption kinetics of MB was demonstrated to be pseudo-second order, governed by two intraparticle diffusion rates, and the adsorption process was exothermic, spontaneous, and more disorder. The Langmuir isotherm model suggested that the maximum adsorption capacity of MB on the PAT composites was in the range of 435–637 mg g–1. In general, it increased with the TiO2 NPs content in the PAT composites, due most likely to the increase in surface area exposing more functional groups of the pectin and alginate to interact with the synthetic dye. The adsorptive removal of MB by the PAT composites was found to be more efficient compared with many other reported adsorbents, such as graphene oxide hybrids, pectin microspheres, magnetite-silica-pectin composites, clay-based materials, chemically treated minerals, and agricultural waste. The present study therefore demonstrated for the first time that PAT composites are not only promising to be utilized as an adsorbent in wastewater treatment, but also provide an insight into the adsorption mechanism of the synthetic dyes onto the biopolymers-titania composites. Graphic abstract Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles.

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Section: The Effect Of Temperaturementioning

confidence: 84%

Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles

et al. 2021

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“…Adsorption isotherm data were analysed by the Langmuir isotherm model that accounts for monolayer surface adsorption (Kusrini et al, 2019a;Kusrini et al, 2019b). The Langmuir isotherm model, Qe, was fitted using a linearized form, according to Equation 1.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…Kinetic data were investigated using the Weber-Morris intraparticle diffusion model (Weber and Morris, 1963) with Equation 4. Accordingly, in these simulations, the time-dependent adsorption efficiency was fitted by Equations 2-4 (Kusrini et al, 2019b).…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…In recent years, adsorption-based methods have been employed to investigate the removal of heavy metal ions from wastewater (Gupta et al, 2012;Salah et al, 2014;Zhang et al, 2018;Vieira et al, 2019;Kusrini et al, 2020a;Kusrini et al, 2020b). Adsorption is typically employed in industries due to its high efficiency and cost-effectiveness (Kusrini et al, 2019a;Kusrini et al, 2019b;Kusrini et al, 2019c). Some polymers and synthetic materials, such as chitosan (CHN), hydroxyapatite (HAP), activated carbon and zeolites have been reportedly used as adsorbents to remove heavy metal ions from aqueous media (Gupta et al 2012;Salah et al, 2014;Zhang et al, 2018;Vieira et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Micro-structured Materials for the Removal of Heavy Metals using a Natural Polymer Composite

Kusrini¹,

Ayuningtyas²,

Mawarni³

et al. 2021

IJTech

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In this study, a precipitation method was employed to prepare a synthetic hydroxyapatite (HAP)/chitosan (CHN) composite by the modification of synthetic HAP with CHN. The HAP/CHN composite was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy (SEM-EDX). Furthermore, the HAP/CHN composite in a 1:1 ratio (wt.%) was investigated as an adsorbent for the removal of heavy metals ions (such as Cr 6+ , Cd 2+ and Zn 2+ ) from simulated wastewater. Adsorption experiments were conducted in batch mode at room temperature. In addition, the effect of process conditions, such as contact time, was evaluated. Kinetic data were well-described by the pseudo-second-order kinetic model, where adsorption was governed by the intraparticle diffusion model. The HAP/CHN composite demonstrated potential utility as an adsorbent for the removal of heavy metals from an aqueous solution, with the highest maximum adsorption capacities of 39.3, 30.8 and 29.9 mg/g for Cr 6+ , Cd 2+ and Zn 2+ , respectively. The HAP/CHN composite materials with variable structure and composition exhibited remarkably different adsorption properties and potential applicability for industrial applications due to the material cost-effectiveness.

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“…Currently, commonly used fluoride removal technologies include adsorption, 17 precipitation, 18 membrane treatment, 19 ion exchange, 20 nano‐filtration, 21 electrocoagulation, 22 and membrane separation. The adsorption method has low price and good fluorine removal performance 23 …”

Section: Introductionmentioning

confidence: 99%

Study on the properties of bauxite modified by acid leaching and calcination for improving fluorine removal

Liu

Zhong

Zhu

et al. 2022

Asia-Pacific J Chem Eng

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In order to improve the fluorine removal performance of bauxite, the effects of different calcination temperatures and several acids (HCl, H 2 SO 4 , H 2 C 2 O 4 ) on the fluorine removal performance of bauxite were investigated. It was found that the calcination temperature of 500 C and the modification of H 2 SO 4 had the best fluorine removal performance. Under the same experimental conditions, the fluoride removal rate of the modified bauxite could reach 99.54%, which was much higher than that of unmodified bauxite (52.69%). The adsorbent was characterized by XRD, FTIR, BET, TG/DSC, and XRF. The influence of the addition amount of adsorbent, initial concentration of fluorine, adsorption time, and temperature on fluorine removal performance was studied. The adsorption process reached equilibrium in 32 min, and the inhibition order of coexisting anions was H 2 PO 4 À < HCO 3 À < CO 3 2À < Cl À . The pseudo-secondorder kinetic model was more suitable for the fluoride removal process of modified bauxite. Thermal regeneration had better regeneration performance than alkali leaching regeneration.

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Kinetics, isotherm, thermodynamic and bioperformance of defluoridation of water using praseodymium-modified chitosan

Cited by 20 publications

References 58 publications

Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles

Insight into the adsorption kinetics, mechanism, and thermodynamics of methylene blue from aqueous solution onto pectin-alginate-titania composite microparticles

Micro-structured Materials for the Removal of Heavy Metals using a Natural Polymer Composite

Study on the properties of bauxite modified by acid leaching and calcination for improving fluorine removal

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