Removal of Lead and Nickel Ions Using Zeolite Tuff

Ali, Ahmad Al-Haj; El‐Bishtawi, Ribhi

doi:10.1002/(sici)1097-4660(199705)69:1<27::aid-jctb682>3.0.co;2-j

Cited by 120 publications

(38 citation statements)

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“…[2][3][4] Among several chemical and physical methods, the adsorption of heavy metals onto zeolites has been found to be superior to other techniques because of the capability of the zeolite to remove several cations simultaneously from an aqueous solution through ion exchange. [3][4][5][6][7] The history of ion exchange on zeolites has been reported by several authors. 3,[8][9][10] One of the important properties of zeolites is that they show selectivity in adsorption, i.e.…”

Section: Introductionmentioning

confidence: 74%

Equilibrium ion exchange studies of Ni2+ on homoionic forms of clinoptilolite

et al. 2014

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Research ArticleHomoionic forms of clinoptilolite forms, respectively. The positive changes in enthalpy provide an indication that the sorption reaction is endothermic for Ni(II). The Gibbs free energy values were all negative except for Ca 2+ -exchanged clinoptilolite at 298.15 K and 308.15 K, for which the values were positive 3.10 kJ/mol and 0.53 kJ/mol, respectively. The entropy values for Ni 2+ sorption were also positive; values of 0.12 kJ/mol.K, 0.08 kJ/mol.K and 0.14 kJ/mol.K were obtained for the Na + , K + and Ca 2+ forms, respectively. As expected, the enthalpy obtained from the Van't Hoff plot is dependent not only on the metal ion being adsorbed, but also on the ion being displaced. Pretreatment of the zeolite enhances the removal efficiency provided that monovalent ions are used for the pretreatment. Thus clinoptilolite is an effective low-cost absorbent for the removal of Ni 2+ from aqueous solutions.

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Section: Introductionmentioning

confidence: 74%

Equilibrium ion exchange studies of Ni2+ on homoionic forms of clinoptilolite

et al. 2014

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“…whether the majority of the sorption sites are inside the pores or on the external surface. Furthermore, relatively stronger interaction between heavy metal cations and the zeolite framework occur inside the porous structure rather than at the external surfaces [54]. Due to the weak interaction, heavy metal cations bound to external surfaces can be easily desorbed when the conditions of the system such as pH and temperature are changed.…”

Section: Specific Surface Areamentioning

confidence: 99%

Influence of Physical and Chemical Parameters on the Treatment of Heavy Metals in Polluted Stormwater Using Zeolite—A Review

Ziyath¹,

Mahbub²,

Goonetilleke³

et al. 2011

JWARP

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Zeolite-based technology can provide a cost effective solution for stormwater treatment for the removal of toxic heavy metals under increasing demand of safe water from alternative sources. This paper reviews the currently available knowledge relating to the effect of properties of zeolites such as pore size, surface area and Si:Al ratio and the physico-chemical conditions of the system such as pH, temperature, initial metal concentration and zeolite concentration on heavy metal removal performance. The primary aims are, to consolidate available knowledge and identify knowledge gaps. It was established that an in-depth understanding of operational issues such as, diffusion of metal ions into the zeolite pore structure, pore clogging, zeolite surface coverage by particulates in stormwater as well as the effect of pH on stormwater quality in the presence of zeolites is essential for developing a zeolite-based technology for the treatment of polluted stormwater. The optimum zeolite concentration to treat typical volumes of stormwater and initial heavy metal concentrations in stormwater should also be considered as operational issues in this regard. Additionally, leaching of aluminium and sodium ions from the zeolite structure to solution were identified as key issues requiring further research in the effort to develop cost effective solutions for the removal of heavy metals from stormwater.

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“…Jordanian natural phillipsite has been reported to show the maximum adsorption of 1.31 meq g ¹1 of Pb 2+ ions, 8) although the adsorption of heavy metal ions on phillipsite-type zeolite has hardly been reported. The amount of Pb 2+ ions adsorbed on the FA-phillipsite in this work, about 2.90 meq g…”

Section: Resultsmentioning

confidence: 99%

“…7) One of the advantages of the composite containing sepiolite over single FA-derived phillipsite is its excellent molding-ability caused by the original nature of sepiolite. Sepiolite (Mg 8 Si 12 O 30 (OH) 4 ·12H 2 O) is a fibrous natural clay mineral showing significant H 2 O adsorption and has superior forming performance. 7) The FA-derived zeolites are generally obtained as powder form.…”

Section: Introductionmentioning

confidence: 98%

Adsorption removal of lead and cadmium ions from aqueous solution with coal fly ash-derived zeolite/sepiolite composite

Miyaji

Masuda

Suyama

2010

J. Ceram. Soc. Japan

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Various zeolites have been synthesized from coal fly ash (FA) by hydrothermal treatment with NaOH solution. Phillipsite-type zeolite was synthesized selectively from FA (FA-phillipsite), and succeeded in in situ combining the FA-phillipsite with sepiolite to form FA-phillipsite/sepiolite composite. The adsorption behaviour of two harmful heavy metal ions (Pb 2+ and Cd 2+ ) were investigated for the FA-phillipsite and FA-phillipsite/sepiolite composite (30 mass % sepiolite). It was found that the NaOH hydrothermal treatment produced not only phillipsite but also Na + -substituted sepiolite. Both the FA-phillipsite and the FAphillipsite/sepiolite composite showed high adsorbing-ability for Pb 2+ (2.90 and 2.68 meq g ¹1) and Cd 2+ (1.62 and 1.74 meq g ¹1 ) ions. The adsorption efficiency of the composite was much higher in the measured value than in the calculated one estimated from the maximum adsorbing-ability of the untreated sepiolite. This indicates that the Na + -substituted sepiolite in the composite has excellent adsorbing-ability for Pb 2+ and Cd 2+ ions. Since sepiolite has superior forming performance, the FA-derived phillipsite/ sepiolite composite powder was able to be molded into various shapes e.g. pellet and tube. The FA-phillipsite/sepiolite composite is expected to be a new adsorbent for practical use.

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Removal of Lead and Nickel Ions Using Zeolite Tuff

Cited by 120 publications

References 0 publications

Equilibrium ion exchange studies of Ni2+ on homoionic forms of clinoptilolite

Equilibrium ion exchange studies of Ni2+ on homoionic forms of clinoptilolite

Influence of Physical and Chemical Parameters on the Treatment of Heavy Metals in Polluted Stormwater Using Zeolite—A Review

Adsorption removal of lead and cadmium ions from aqueous solution with coal fly ash-derived zeolite/sepiolite composite

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