Natural Zeolites Zn2

In this study a natural zeolite coming from a layer in the north of Sardinia has been artificially polluted with single aqueous solutions containing increasing concentrations of Pb2+, Cd2+ and Zn2+ cations to obtain adsorption isotherms.

The adsorption of Pb2+, Cd2+, and Zn2+ from equimolar multicomponent solutions onto natural and Fe(III)-modified zeolites was studied by batch experiments in order to determine the influence of the competitive effect on the efficiency ions removal at different initial concentrations and different temperatures. Kinetic and equilibrium studies showed that affinity …

Natural zeolites have been widely used in heavy metals adsorption owing to their unique properties and significant worldwide occurrence (Wang and Peng 2010). The affinity of natural zeolites toward heavy metal ions depends on many factors (Mihaly-Cozmuta et al. 2014), which can be classified in three groups: (1) the properties of ion

Plate 1. Pilot plant set up at Rennes' station (France). Removal of heavy metals from waters by means of natural zeolites 1505 I ::L 150 100 50 Zn2+ Cd2"1" 4 ' I i I I I I i I t 0 0 200 300 400 500 600 BV Fig. 6.

DOI: 10.1016/j.jhazmat.2009.08.132 Corpus ID: 6496746; Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies. @article{Nibou2010AdsorptionOZ, title={Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies.}, author={Djamel Nibou and Hadj Mekatel and …

DOI: 10.1016/J.JHAZMAT.2005.09.027 Corpus ID: 24960583; Factors affecting adsorption characteristics of Zn2+ on two natural zeolites. @article{Oren2006FactorsAA, title={Factors affecting adsorption characteristics of Zn2+ on two natural zeolites.}, author={Ali Hakan Oren and A. M. Kaya}, journal={Journal of hazardous materials}, year={2006}, …

Reviewing the bibliography, it is found that the amount of heavy metals that natural zeolites are capable of adsorbing under normal conditions is 30%, +/- 10, 20, with respect to the weight of the ...

This test has studied the influence of natural zeolite and modified zeolites on the adsorption characteristic of Zn2+ under the conditions of T=25℃ and low concentration of heavy …

The aim of this work is to study the effectiveness of regional, low-cost natural clinoptilolitic zeolite tuff in heavy metal ions removal from aqueous solution, through …

This paper examines the ion-exchange properties of synthetic zeolite Na-P c, which was produced from perlite-waste fines and has a SiO 2:Al 2 O 3 ratio of 4.45:1 and a cation-exchange capacity (CEC) of 3.95 meq g −1.Although equilibrium is attained rapidly for all three metals, exchange is incomplete, with A c (max) (maximum equilibrium fraction of the …

It is clear from these results that the Mordenite is a potential candidate for removal of Co2+, Zn2+ and Mn2+ ions from wastewater than the Stilbite and Heulandite. The extraction efficiency value for Co2+is observed highest forMordenite at a concentration of 50 mg/l. ... Present results suggest that natural zeolites can be removed heavy metal ...

Request PDF | Continuous elimination of Pb2+, Cu2+, Zn2+, H+ and NH4+ from acidic waters by ionic exchange on natural zeolites | A study of breakthrough curves for cations usually found in acid ...

In this study, the adsorption behavior of natural (clinoptilolite) zeolites with respect to Co 2+, Cu 2+, Zn 2+, and Mn 2+ has been studied in order to consider its application to purity metal finishing wastewaters. ... Zn2+, and Mn2+ onto natural zeolite as a function of their concentrations was studied at 30 C by varying the metal ...

Research on natural zeolites (NZ) has increased over the years, showing potential in different areas, and many of them involve cation exchange (CE), considered one of the essential properties of NZ. ... Na-modifications have shown the highest selectivity for zinc ions when Zn2+ ions are mixed together with Fe3+ ions, which is highly dependent ...

Zeolites form a large family of aluminosilicates which have been studied by mineralogists for more than 200 years [1].Zeolites are microporous crystalline solids with well-defined structure, consisting of a three-dimensional network of SiO 4 and AlO 4 tetrahedra linked together by common oxygen atoms [1], [2].The isomorphic substitution of Si 4+ by Al 3+ …

The Philippine natural zeolite (PNZ) was characterized and subjected to Zn2+ adsorption tests in aqueous solutions to determine its adsorption uptake and to understand its adsorption behaviour. The PNZ was characterized using XRD, SEM, BET-analysis and TG-DTA. XRD showed significant peaks indexed to natural mordenite-type zeolite along with other …

Herein, we present the ability of natural zeolites from the Philippines to adsorb heavy metal (As5+, Cu2+, Ni2+, Pb2+ and Zn2+) ions for the first time.

Removal of Zn 2+, Cd and Pb2+ from binary aqueous solution by natural zeolite and granulated activated carbon 127 Maced., J. Chem. Chem. Eng., 26 (2), 125–134 (2007) The adsorbents were ...

The Philippine natural zeolite (PNZ) was characterized and subjected to Zn 2+ adsorption tests in aqueous solutions to determine its adsorption uptake and to understand its adsorption behaviour. The PNZ was characterized using XRD, SEM, BET-analysis and TG-DTA. XRD showed significant peaks indexed to natural mordenite-type zeolite along with other …

The sorption performance of distinct zeolite species synthesized from PBM for Zn 2+ and Ni 2+ was evaluated and compared with commercial natural (clinoptilolite-rich rock) …

The influence of pretreatment on the capacity and selectivity of natural zeolite for Zn2+ and Mn2+ ions has been studied. Natural tuff (sample 1), consisting mainly of zeolite clinoptilolite, was ...

The natural zeolite has shown three times higher removal efficiency for Zn2+ ion than alumina. On the other hand, alumina exhibited comparable but smaller removal efficiency for As3+ as with that ...

The crystallinity and the morphology of the modified zeolites showed that the natural zeolite from Malang Indonesia has the main component of mordenite-type zeolite.

Abstract Low-cost zeolite sorbents, which have unique ion exchange and sorption properties, have been investigated as candidates for cost-effective removal of heavy metals from waste solution. Waste products from various industries are employed to prepare or modify zeolite for the improvement of adsorption capacity. In this review, the applications of natural, modified, …

Natural zeolites can be modified by cationic surfactants (SMZ) which convert natural zeolites into multifunctional adsorbents suitable for cations, anions, and molecular species uptake from different polluted sources (Dionisiou and Matsi, 2016). The large surfactant molecules cannot enter the channels and cavities of the natural zeolites.

Cation Exchange (Ag+, Zn2+, Cu2+)behavior of Natural Zeolites. Ayben Top. İzmir Institute of Technology, İzmir, 2001 - 206 pages. In this study, clinoptilolite, most abundant zeolite present in nature, was proposed as a low cost antibacterial material. As a preliminary work, antibacterial activities of the original, Ag, and Zn forms of the ...

Request PDF | Sorption processes and XRD analysis of a natural zeolite exchanged with Pb2+, Cd2+ and Zn2+ cations | In this study the Pb(2+), Cd(2+) and Zn(2+) adsorption capacity of a natural ...

Factors affecting adsorption characteristics of Zn2+ on two natural zeolites (PDF) Factors affecting adsorption characteristics of Zn2+ on two natural zeolites | Hakan Ören - Academia.edu Academia.edu no longer supports Internet Explorer.

Modification of natural zeolites can be done in several methods such as acid treatment, ion exchange, and surfactant functionalisation, making the modified zeolites …