Enhanced sorption of radiocobalt from water by Bi(III) modified montmorillonite: A novel adsorbent

Li, Yuan; Zhang, Shouwei; Niu, Haihong; Chen, Zhe‐Sheng; Xu, Jinzhang

doi:10.1016/j.jhazmat.2011.05.004

Cited by 22 publications

(19 citation statements)

References 50 publications

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“…From the table it can be seen that the corresponding correlation coefficients (r 2 ) are close to unity, indicating that the experimental data fits the pseudo-second-order model equation [41]. This finding suggests that the adsorption process includes two steps, i.e.…”

Section: Kinetic Studysupporting

confidence: 54%

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 Studysupporting

confidence: 54%

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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“…(7)(8)(9) are listed in Table 2. The value of DG 0 is negative as expected for a spontaneous process under the conditions applied.…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

“…With a better awareness of this problem, the removal of 60 Co from wastewater has been the focus of many research studies [4][5][6][7][8][9][10][11][12][13][14]. In these studies, batch sorption technology has been extensively adopted and various adsorbent materials have been used.…”

Section: Introductionmentioning

confidence: 99%

Utilization of chitosan–clinoptilolite composite for the removal of radiocobalt from aqueous solution: kinetics and thermodynamics

Zhao

Deng

et al. 2015

J Radioanal Nucl Chem

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Chitosan-clinoptilolite composite was prepared and tested for removing radiocobalt from aqueous solution. The composite was characterized with Fourier transform infrared spectroscopy, X-ray diffraction analysis and scanning electron microscopy coupled with energy dispersive X-ray analysis. The sorption of Co(II) on chitosanclinoptilolite composite was pH-dependent and ionic strength-independent. The kinetic sorption was fitted well by a pseudo-second-order rate equation. The thermodynamic parameters (DH 0 , DS 0 , DG 0 ) revealed that the sorption of Co(II) on chitosan-clinoptilolite composite was spontaneous and endothermic. The study showed that chitosan-clinoptilolite composite had excellent potential for the treatment of wastewater containing radiocobalt.

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“…As shown in the Table 1, CDW [8][9][10][11][12][13][14][15][16], geo- [17][18][19][20][21][22] and biosorbents [23][24][25][26][27][28][29][30], major target metals including Cu, Cd (39.9%), Pb (33.3%), and Zn (24%) were studied, while less consideration was given to metals like As (12.1%), Cr, Hg, and Mn (6.1%). The particle sizes used varied for each category and metal type in reviewed papers.…”

Section: Resultsmentioning

confidence: 99%

Reviews on the Applicability of Construction and Demolition Waste as Low-Cost Adsorbents to Remove-Heavy Metals in Wastewater

Kumara

Saito

Asamoto

et al. 2018

GEOMATE

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Removal of heavy metals from wastewater is of special concern due to the persistence of heavy metals in the environment. The industrial discharge of heavy metals adversely affects soil and water resources, aquatic organisms, and ecosystem integrity. In addition, high concentrations of heavy metals are detected in solid waste landfill leachate in many developing countries due to non-segregated waste dumping. At present, various kinds of adsorbents such as activated carbon, biomass resources, geomaterials, and industrial waste products are used to treat heavy metal-contaminated water. However, the use of construction and demolition waste (CDW) and its recycled materials to treat heavy metal-contaminated water has not been fully examined. Because the generation of CDW is increasing due to rapid urbanization and a high demand for construction, the wise use of CDW and its recycled materials is necessary. This paper reviews journal articles published from 2004 to 2016 that studied the applicability of low-cost CDW adsorbents to remove heavy metals from wastewater. In particular, it summarizes results on using CDW and recycled materials such as cement, concrete, and brick compared to those from various other adsorbents such as biosorbents, geomaterials, and their industrial products. The potential applicability of CDW and its recycled materials as heavy-metal adsorbents was examined based on a comparison table listing material properties, test conditions, and measured adsorption properties.

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Enhanced sorption of radiocobalt from water by Bi(III) modified montmorillonite: A novel adsorbent

Cited by 22 publications

References 50 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

Utilization of chitosan–clinoptilolite composite for the removal of radiocobalt from aqueous solution: kinetics and thermodynamics

Reviews on the Applicability of Construction and Demolition Waste as Low-Cost Adsorbents to Remove-Heavy Metals in Wastewater

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