Sorption characteristics of zinc and iron by natural zeolite and bentonite

Sheta, A. S.; Falatah, A. M.; Al-Sewailem, M. S.; Khaled, E. M.; Sallam, Abdelazeem Sh.

doi:10.1016/s1387-1811(03)00360-3

Cited by 130 publications

(74 citation statements)

References 20 publications

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“…One explanation could be that they actually did obtain elements or compounds that they could use in their metabolism by boring through the minerals. Zeolites are well known for their capacity to adsorb various elements and compounds like metals, hydrocarbons and molecular hydrogen within their crystal framework of molecular-sized channels (Sheta et al, 2003;Langmi et al, 2003). Zeolites are frequently used in industrial processes as ion exchangers, catalysts and molecular sieves, and it is most likely that zeolites in subseafloor settings adsorb compounds like Fe, CH 4 or H 2 from hydrothermal fluids which microorganisms can scavenge when dissolving the minerals.…”

Section: Microbe-mineral Interactionsmentioning

confidence: 99%

The Use of ESEM in Geobiology

Ivarsson¹,

Holmström²

2012

Scanning Electron Microscopy

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Today, an individual would be hard-pressed to find any science field that does not employ methods and instruments based on the use of fine focused electron and ion beams. Well instrumented and supplemented with advanced methods and techniques, SEMs provide possibilities not only of surface imaging but quantitative measurement of object topologies, local electrophysical characteristics of semiconductor structures and performing elemental analysis. Moreover, a fine focused e-beam is widely used for the creation of micro and nanostructures. The book's approach covers both theoretical and practical issues related to scanning electron microscopy. The book has 41 chapters, divided into six sections: Instrumentation, Methodology, Biology,

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Section: Microbe-mineral Interactionsmentioning

confidence: 99%

The Use of ESEM in Geobiology

Ivarsson¹,

Holmström²

2012

Scanning Electron Microscopy

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“…Most of the heavy metals are highly toxic and are non-biodegradable, therefore they must be removed from the polluted streams in order to meet increasingly stringent environmental quality standards. The removal of heavy metal cations using natural zeolites was studied by many authors [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Most of published paper on adsorption of metallic ions are aimed at assessing the adsorption capacity [1,2,5,6,8,9,10], and only a few attempts have been made to elucidate the mechanism of binding [11]. The adsorption mechanism depends strongly on the nature of the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of manganese removal from aqueous solution by adsorption on natural zeolite

Zendelska

Golomeova

Blažev

et al. 2015

Maced. J. Chem. Chem. Eng.

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The kinetics of manganese adsorption onto natural zeolite (clinoptilolite) was studied in terms of initial metal ion concentration and adsorbent mass. In order to select the main rate-determining step in the overall uptake mechanism, a series of experiments was performed under batch conditions from single ion solutions. Data obtained from the kinetic experiments are interpreted in terms of pseudo-second order kinetic model, Weber and Morris model and model proposed by Furusawa and Smith.The adsorption kinetics is reasonably fast. It means that in the first 20 min approximately 75% of Mn 2+ is adsorbed from solutions. From the kinetic data, it can be concluded that adsorption of manganese ions from solution by natural zeolite is more efficient at higher adsorbent mass and at lower manganese concentration in solution. The amount of Mn adsorbed on zeolite increases at higher manganese concentration in solution.From the kinetic models, it can be concluded that intraparticular diffusion is more likely to be the rate determining step, but at higher concentrations of Mn ions in solution, film diffusion may take a part in a rate determining step.Key words: manganese ions; adsorption; zeolite; kinetic ИСПИТУВАЊЕ НА КИНЕТИКАТА НА ОТСТРАНУВАЊЕTO НА МАНГАН ОД ВОДНИ РАСТВОРИ СО АТСОРПЦИЈА НА ПРИРОДЕН ЗЕОЛИТКинетиката на атсорпцијата на манган со природен зеолит (клиноптилолит) е испитувана во зависност од почетната концентрација на јони на манган во растворот и масата на атсорбентот. Со цел да се определи најбавниот чекор на реакцијата, преку кој би се определила вкупната брзина на реакцијата, изведени се серија експерименти во еднокомпонентни раствори. Добиените податоци се интерпретирани со: псевдо кинетичкиот модел од втор ред, моделот на Weber и Morris и моделот предложен од Furusawa и Smith.Резултатите покажуваат дека атсорпцијата се одвива релативно брзо. Тоа значи дека во првите 20 min околу 75% од јоните на манган во растворот се атсорбирани на клиноптилолитот. Од податоците од испитувањето на кинетиката може да се заклучи дека атсорпцијата на манга-новите јони е поефикасна при поголема маса на атсорбент и при пониска концентрација на манган во растворот. Количината на атсорбиран манган врз зеолитот се зголемува со порастот на концен-трацијата на јоните на манган во растворот.Од моделирањето на кинетиката може да се заклучи дека поверојатно е чекорот со кој се определува брзината на атсорпцијата да биде дифузијата во внатрешноста на честичката, но при повисоки концентрации на јони на манган во растворот за определување на чекорот може да се земе во предвид и филм-дифузијата.Клучни зборови: јони на манган; атсорпција; зеолит; кинетика  Dedicated to Academician Gligor Jovanovski on the occasion of his 70 th birthday.A. Zendelska, M. Golomeova, K. Blažev, B. Boev, B. Krstev, B. Golomeov, A. Krstev Maced.

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“…Alvarez-Ayuso and Garcia- Sanchez (2003) utilized natural and Na-exchanged bentonite for removal of Cr 3+ , Ni 2+ , Zn 2+ , Cu 2+ , and Cd 2+ from wastewaters of galvanic industries. Sheta et al (2003) utilized natural zeolite and bentonite for studying the sorption characteristics of zinc and iron ions from solution. Al-Degs et al (2000) employed diatomite and manganese oxide modified-diatomite for remediation of lead, copper, and cadmium ions from water.…”

Section: Introductionmentioning

confidence: 99%

Cobalt and zinc removal from aqueous solution by chemically treated bentonite

et al. 2007

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Natural bentonite was treated by hydrochloric, nitric, and phosphoric acids followed by washing with sodium hydroxide in order to enhance its adsorption capacity. The sample that treated with hydrochloric acid followed by further treatment with NaOH showed the highest cation exchange capacity with a value of 51.20 meq/100 g. The zero-point of charge for this sample was found to be 4.50. Adsorption isotherms for both cobalt and zinc were fitted using Langmuir, Freundlich, and Redlich-Peterson and showed an adsorption capacity of 138.1 mg Co 2+ and 202.6 mg Zn 2+ per gram of treated sample.

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Sorption characteristics of zinc and iron by natural zeolite and bentonite

Cited by 130 publications

References 20 publications

The Use of ESEM in Geobiology

The Use of ESEM in Geobiology

Kinetic studies of manganese removal from aqueous solution by adsorption on natural zeolite

Cobalt and zinc removal from aqueous solution by chemically treated bentonite

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