Adsorption of copper ions from aqueous solutions on natural zeolite

Abstract

The adsorption of copper ions from synthetic aqueous solutions on natural zeolite (clinoptilolite) was examined. In order to determine the rate of adsorption and the copper uptake at equilibrium, a series of experiments were performed under batch conditions from single ion solutions. Equilibrium data were evaluated based on adsorption (Langmuir and Freundlich) isotherms. The adsorption kinetics is reasonably fast. In the first 20 min of the experiment, approximately 80% of Cu 2+ ions is adsorbed from the solutions. Data obtained from the kinetic experiments have been described by the pseudo-second order kinetic model as well as by the Weber-Morris and Furusawa-Smith models.

Application of natural zeolite in wastewater treatment: A review

“…The experimental conditions for removal of contaminants by adsorption process are very important. The ability of zeolite to be regenerated and its reuse is very important for the environment because this prevents the generation of new waste material [44]. Many researchers are dealing with the application of natural zeolites in removing metal ions from wastewater [22,23,44,45,46].…”

“…The ability of zeolite to be regenerated and its reuse is very important for the environment because this prevents the generation of new waste material [44]. Many researchers are dealing with the application of natural zeolites in removing metal ions from wastewater [22,23,44,45,46]. Additionally, clinoptilolite has been investigated as adsorbent for the removal of dyes, phenols and phenol derivatives from aqueous solutions, as summarized in Table 3.…”

“…Zdenska et al [44] examined the possibility of using clinoptilolite to remove copper ions from synthetic solutions, at pH 3.5. It has been observed that, as the initial copper concentration in aqueous solution increases, adsorption capacity also increases, while the degree of adsorption decreases.…”

Use of Sorption of Copper Cations by Clinoptilolite for Wastewater Treatment

“…Assuming an adsorption on a non-homogeneous adsorption surface, a Freundlich adsorption isotherm was used with the following form [ 9 , 27 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ]: where K and n are Freundlich constants, which indicate the adsorption capacity of the adsorbent and the adsorbent adsorbate affinity. Graphical representation of the Freundlich adsorption isotherm is shown in Figure 3 .…”

Use of chitosan-modified fly ashes and zeolites for removal of heavy metal ions Zastosowanie popiołów lotnych i zeolitów modyfikowanych chitozanem do usuwania jonów metali ciężkich

“…Przy wzroście stężenia początkowego jonów metali obserwowano także spadek wartości stałych szybkości procesu sorpcji k 1 i k 2 oraz spadek parametru h (początkowa szybkość); tabela 4. Sprawdzono także możliwość współistnienia transportu dyfuzyjnego, używając modelu Webera i Morrisa, zwanego modelem dyfuzji międzycząstkowej (intraparticle diffusion) 25) . Potwierdziło to obecność zjawiska dyfuzji wewnątrz porów sorbentu, która mogła być etapem limitującym transport jonów metali do miejsc aktywnych.…”