Removal of hazardous azopyrazole dye from an aqueous solution using rice straw as a waste adsorbent: Kinetic, equilibrium and thermodynamic studies

El-Bindary, A.A.; El‐Sonbati, A.Z.; Al-Sarawy, A. A.; Mohamed, Khaled S.; Farid, Mansour A.

doi:10.1016/j.saa.2014.10.094

Cited by 31 publications

(4 citation statements)

References 39 publications

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“…an initial rapid adsorption followed by a much slower step. The rapid adsorption process may be attributed to the existence of large numbers of adsorption sites on the external surface of bentonite sample [42]. The subsequent slow adsorption procedure is assigned to the exchange with ions on the outer surface of bentonite material or the longer diffusion path of the metal ion into the inner pores of bentonite.…”

Section: Kinetic Studymentioning

confidence: 99%

Removal of cobalt(II) from aqueous solution by local Saudi bentonite: Kinetic and equilibrium investigations

Al-Duaij

Attia

Khezami

et al. 2016

Maced. J. Chem. Chem. Eng.

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Natural bentonite clay from Saudi Arabia was used to remove cobalt from aqueous solution. The clay samples were first characterized for their chemical composition and structure. Batch sorption studies were then conducted to assess their capacity to remove cobalt. The effect of contact time, initial analyte concentration, bentonite dose and temperature on the adsorption was investigated. The results showed that equilibrium was attained in 60 minutes. The metal adsorption was fitted to a Langmuir isotherm model and the maximum monolayer adsorption capacity was found to be 19.85 mg g −1 at 333 K. The pseudosecond-order kinetic model provided the best correlation to the experimental data. The application of an intra-particle diffusion model revealed that the adsorption mechanism of the cobalt ions is a rather complex process and that diffusion is involved in the overall rate of the adsorption process, but it is not the only rate-controlling step. The activation energy, E a , ranged between 4.33 and 9.14 kJ mol −1 , indicating a physical adsorption process.Keywords: bentonite; cobalt; kinetics; equilibrium ОТСТРАНУВАЊЕ НА КОБАЛТ(II) ОД ВОДНИ РАСТВОРИ СО ЛОКАЛЕН САУДИСКИ БЕНТОНИТ: КИНЕТИЧКИ И РАМНОТЕЖНИ ИСТРАЖУВАЊАПриродната бентонитна глина од Саудиска Арабија беше употребена за отстранување на кобалт од водни растврори. Глинените примероци прво беа карактеризирани преку хемиска анализа и структура. Потоа беа спроведени сорпциски истражувања со цел да се процени нивниот капацитет за отстранување на кобалт. За атсорпцијата беа испитувани ефектот на времето на дејството, почетната концентрација на аналитот, бентонитната доза и температурата. Резултатите покажаа дека рамнотежата се постигнува за 60 минути. Атсорпцијата на металот беше усогласена со изотермен модел на Langmuir и беше определено дека максималниот монослоен капацитет изнесува 19,85 mg g −1 на 333 K. Најдобра корелација беше постигната со кинетички модел од псевдо-втор ред. Примената на дифузиски модел на интра-честички откри дека атсорпцискиот механизам на јоните на кобалт е доста сложен процес и дека вклучува дифузија во севкупната брзина на атсорпцискиот процес, но не е чекорот што ја контролира брзината. Активациската енергија, E a , се движи од 4,33 до 9,14 kJ mol −1 што укажува на физички атсорпционен процес.

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Section: Kinetic Studymentioning

confidence: 99%

Removal of cobalt(II) from aqueous solution by local Saudi bentonite: Kinetic and equilibrium investigations

Al-Duaij

Attia

Khezami

et al. 2016

Maced. J. Chem. Chem. Eng.

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“…The rate of dyes adsorption onto adsorbent was fitted to traditional models like, pseudo-first, second-order, intra-particle and Elovich models. The Lagergren pseudo-first order modeled scribed the adsorption kinetic data 55 . The Lagergren is commonly expressed as follows:…”

Section: Kinetic Studymentioning

confidence: 99%

Modeling of Competitive Ultrasonic Assisted Removal of The Crystal Violet and Aura Mineo using Mwcnts Functionalized by N-(3-Nitrobenzylidene)-Nˊ-Trimethoxysilylpropyl-Ethane-1,2-Diamine:Equilibrium, Kinetics and Thermodynamic Study

Raoufi¹

2016

Orient. J. Chem

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In this study, adsorbent was synthesized by covalently anchoring N-(3-nitro-benzylidene)-N-trimethoxysilylpropyl-ethane-1, 2-diamine onto multi-walled carbon nanotubes (NBATSPEDMWCNTs). This novel material was characterized by different techniques such as XRD, SEM and FT-IR.Subsequently, it was used for the ultrasound-assisted removal of Aura mine O(AO) and Crystal violet (CV) from aqueous solutions was investigated. The dependency of removal percentages to variables such as pH, initial dyes concentration,adsorbent dosage, sonication time on the removal percentages of AO and CV were simultaneously investigated by central composite design (CCD) under response surface methodology (RSM). It was shown that the adsorption of AO and CV follows the pseudo-second-order rate equation, while the Langmuir model explains equilibrium data. Isotherms had also been used to obtain the thermodynamic parameters such as free energy (DG°), enthalpy (DH°) and entropy (DS°) of adsorption. The negative value of DG° indicates the feasibility and spontaneity of the adsorption process. The positive DH° suggests the endothermic nature of the adsorption. The positive values of DS 0 reflect the affinity of multi-walled carbon nanotubes functionalized towards CV and AO. A small amount of the adsorbent was able to remove more than 99.20% of both dyes rapidly with high adsorption capacity in binary-component system (69.36 mgg -1 and 120.65mg g -1 for AO and CV respectively).

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“…e bi or trimetallic nanocomposites can be used for the degradation of nonbiodegradable organic contaminants and other compounds [32][33][34]. e adsorption, photocatalysis, ion exchange, and classic homogeneous Fenton oxidation are few of the widely used processes for the treatment of wastewater which contains organic synthetic dyes, pesticides, personal care products, and pharmaceuticals [35][36][37][38][39]. e use of cyclic oligosaccharides, such as cyclodextrins, is extended due to its excellent properties associated with its ability for preparing of supramolecular structures.…”

Section: Introductionmentioning

confidence: 99%

Trimetallic@Cyclodextrin Nanocomposite: Photocatalyst for Degradation of Amoxicillin and Catalyst for Esterification Reactions

Sharma

García‐Peñas

Naushad

et al. 2021

Journal of Chemistry

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The industry is looking for new materials which can respond to specific applications that exclusively advance materials can provide. In this context, nanoparticles and nanocomposites opened an interesting method for designing specific properties which can be modulated according to the requirements. The preparation of biomolecules supported trimetallic nanoparticles and some other derives is a good example of the complex systems that can be designed for getting exclusive properties. This study is based on the preparation of new cyclodextrin supported Fe/La/Zn trimetallic nanocomposite by the microemulsion technique. Photocatalytic degradation of amoxicillin was performed using cyclodextrin-Fe/La/Zn. 78% of amoxicillin photodegradation along 4 hours of photoirradiation was achieved. Finally, the catalytic nature of new material was explored for oxidation and esterification reactions. The present study revealed that this advanced multifunctional nanomaterial can be successfully employed for environmental remediation and catalytic activities.

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Removal of hazardous azopyrazole dye from an aqueous solution using rice straw as a waste adsorbent: Kinetic, equilibrium and thermodynamic studies

Cited by 31 publications

References 39 publications

Removal of cobalt(II) from aqueous solution by local Saudi bentonite: Kinetic and equilibrium investigations

Removal of cobalt(II) from aqueous solution by local Saudi bentonite: Kinetic and equilibrium investigations

Modeling of Competitive Ultrasonic Assisted Removal of The Crystal Violet and Aura Mineo using Mwcnts Functionalized by N-(3-Nitrobenzylidene)-Nˊ-Trimethoxysilylpropyl-Ethane-1,2-Diamine:Equilibrium, Kinetics and Thermodynamic Study

Trimetallic@Cyclodextrin Nanocomposite: Photocatalyst for Degradation of Amoxicillin and Catalyst for Esterification Reactions

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