Application of Some Natural Porous Raw Materials for Removal of Lead and Zinc from Aqueous Solutions

Golomeova, Mirjana; Zendelska, Afrodita

doi:10.5772/62347

Cited by 11 publications

(8 citation statements)

References 27 publications

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“…This conclusion can be seen from Table 2. Sprynskyy et al (Sprynskyy 2006), Motsi (2010) and Golomeova and Zendelska (2016) also found a similar trend, that is, a decrease in effi ciency, in their work, on the adsorption of some heavy metals from solution by zeolite.…”

Section: Effect Of Initial Metal Concentration In Solutionmentioning

confidence: 54%

Archives of Environmental Protection

Zendelska¹,

Golomeova²,

Golomeov³

et al. 2018

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The adsorption of lead ions onto a zeolite bearing tuff (stilbite) from synthetic acid aqueous solution and acid mine drainage taken from Sasa mine, Macedonia, is elaborated in this paper. The results present that adsorption occurs effi ciently in both of cases.The physical and chemical properties of the used natural material, zeolite bearing tuff, are characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy. The concentration of metal ions in solution before and after treatment is obtained by AES-ICP.The effectivity of zeolite bearing tuff is determined through a series of experiments under batch conditions from single ion solutions, whereby the main parameters are the effects of initial pH of solution, mass of adsorbent, initial metal concentration in solution, contacting time and competing cations. The maximum capacity of zeolite bearing tuff for removal of lead ions from solution is determined by equilibrium studies.The experimental obtained data are fi tted with Freundlich and Langmuir adsorption models. The experimental data are better fi tted with Langmuir adsorption isotherm.Zeolite bearing tuff is effective adsorbent for treating acid mine drainage. The results showed that 99% of lead ions are removed from acid mine drainage, i.e. the concentration of lead ions from 0.329 mg/dm 3 decrease to 0.002 mg/dm 3 . The pH value of acid mine drainage from 3.90 after treatment with zeolite bearing tuff increases to 5.36.

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Section: Effect Of Initial Metal Concentration In Solutionmentioning

confidence: 54%

Archives of Environmental Protection

Zendelska¹,

Golomeova²,

Golomeov³

et al. 2018

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“…For the liquid phase, the adsorbed amount tripled if the CST sample was used instead of CS and it could also be seen that when hexane was used as a solvent for toluene, the adsorbed amount of toluene decreased to one fifth for the sample CST and it was reduced practically eight times for the CS sample. What might be happening was that by affinity, size and orientation, as mentioned above, initially toluene was adsorbed in a greater proportion while the filling of the micropores occurred, but then part of the adsorbed toluene was displaced by hexane, which made the amount adsorbed less for the liquid phase than for the gas phase, since for the liquid phase toluene competed with hexane for adsorption sites, these adsorption sites were heterogeneous according to what was obtained by the Freundlich model since the parameter 1/n is still less than one, as in the gas phase (Golomeova and Zendelska, 2016;de Sá et al, 2017;Mu and Sun, 2019).…”

Section: Adsorbateadsorbentmentioning

confidence: 92%

Comparative Study of Toluene and Hexane Adsorption on Activated Carbons From Gas and Liquid Phase. Enthalpy and Isotherms

Hernández-Monje

Giraldo

Moreno–Piraján

2020

Front. Environ. Chem.

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Activated carbons with different chemical and textural properties were used to carry out the adsorption of toluene and hexane from gas phase and from liquid phase for toluene-hexane solutions where toluene was used as a solute and hexane as the solvent, complementing the process with the evaluation of the immersion enthalpy for the pure components and toluene-hexane mixtures at different molar fractions. The adsorption capacities for the gas phase were between 3.40 and 0.05 mmol g −1 , being higher for toluene because of the π-π interaction with the solid; when evaluating the liquid phase, the adsorption capacities were 0.24 and 0.74 mmol g −1 , where the adsorption of toluene decreased compared to the gas phase because of the solute-solute, solvent-solvent, solute-solvent interaction. The immersion enthalpies for the pure solvents were between −40.87 and −126.10 J g −1 being higher also for toluene confirming a greater interaction compared to hexane; for the mixtures, immersion enthalpy was higher than hexane enthalpies, but lower than toluene enthalpies with values between −59.79 and −107.95 J g −1. It was found that there was a greater interaction between the sample with a lower content of acid groups and a greater surface area with toluene due to the high electron density of carbon and London-type as π-π interactions with the aromatic compound. For mixtures, hexane decreased the adsorption capacity and interaction with respect to toluene because there was competition for adsorption sites and subsequent displacement of hexane molecules when the amount of toluene on the surface increased.

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“…The calculated amount of cation uptake by the zeolite comes out from the difference between the amount in the starting and final solutions [11,12]. For the metal cations, chemical determinations were done using a spectrometer Perkin Elmer OPTIMA-2100-DV ICP [13,14]. Ammonia was determined using the standard distillation and titration procedure [15].…”

Section: Reagentsmentioning

confidence: 99%

Evaluación De La Capacidad De Intercambio Catiónico, Cic, De Zeolita Natural O De Zeolita Intercambiada Con Sodio De Formaciónes Ignimbríticas en Puno, Perú, Por Medición De La Remoción De Amonio Y De Metales Pesados

Valdivia¹,

Urday²,

Velásquez³

2021

Rev. Bol. Quim.

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Este artículo presenta los resultados de una investigación realizada sobre las formaciones ignimbríticas en el área de Puno en el sureste de Perú, asociadas con el volcanismo terciario. La caracterización mineralógica, realizada mediante análisis difractométrico y microscopía electrónica de barrido reveló la presencia de heulandita junto con esmectita, cuarzo, mordenita, cristobalita y feldespato. El análisis de laboratorio realizado en muestras representativas del depósito investigado mostró una capacidad de intercambio catiónico (CIC) de aproximadamente 50 meq por 100 gramos de material zeolítico y un área de superficie específica, determinada mediante el método N2-BET, de aproximadamente 33,56 m2 / g . Las pruebas de capacidad de intercambio de cationes utilizando soluciones que contienen diferentes concentraciones de NH4 +, Pb+2, Cd+2, Cu+2, Zn+2 y Mn+2, consideradas individualmente, han mostrado el siguiente orden de selectividad: Pb+2> Cd+2> Cu+2> Zn+2> Mn+2> NH4 +. Además, para aumentar la capacidad de intercambio catiónico, el material zeolítico se pre-trató con una solución de NaCl 2N. Los resultados obtenidos demuestran la eficiencia del preacondicionamiento que produce un aumento sustancial en la capacidad de intercambio para todos los cationes examinados.

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Application of Some Natural Porous Raw Materials for Removal of Lead and Zinc from Aqueous Solutions

Cited by 11 publications

References 27 publications

Archives of Environmental Protection

Archives of Environmental Protection

Comparative Study of Toluene and Hexane Adsorption on Activated Carbons From Gas and Liquid Phase. Enthalpy and Isotherms

Evaluación De La Capacidad De Intercambio Catiónico, Cic, De Zeolita Natural O De Zeolita Intercambiada Con Sodio De Formaciónes Ignimbríticas en Puno, Perú, Por Medición De La Remoción De Amonio Y De Metales Pesados

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