Use of Pistachio Shells as an Adsorbent for the Removal of Zinc(II) Ion

Abstract

In this study, the removal of zinc(II) ion from an aqueous solution by pistachio shells (PS) is investigated. The dynamic behavior of the adsorption is examined on the effects of pH, adsorbent dosage, and contact time. The adsorption rates are determined quantitatively and simulated by the Lagergren first order, pseudo-second order, Elovich, and intra-particle diffusion kinetic models. The adsorption kinetic models are also tested for validity. The thermodynamic parameters, which are also deduced from adsorption experiments, are very useful in elucidating the nature of adsorption. The experimental results reveal that the optimum pH value and the contact time for the adsorption of Zn 2þ onto PS are found as 6 and 10 min, respectively. According to these parameters, adsorption process follows the pseudo-second order kinetic model with high correlation coefficients (R 2 ¼ 0.999). The obtained results demonstrate that PS is a reasonably effective adsorbent for the removal of Zn 2þ from aqueous leachate of hazardous waste.

Biosorption of zinc(II) on rapeseed waste: Equilibrium studies and thermogravimetric investigations

“…6 show that in the initial stages of the sorption process the amounts of Zn(II) retained on rapeseed increased sharply with increasing contact time of the phases, reaching values that remained then almost constant. A similar trend was observed for the case of removing Zn(II) by the pistachio shells (Turan and Mesei, 2011). In this context, it can be considered that the retention of Zn(II) ions on rapeseed takes place in two distinct steps, a relatively fast phase followed by a slower one.…”

Treatment of Wastewater Using Seaweed: A Review

“…The adsorption process is economical, effective, simple, and versatile, and has become the most preferred treatment for heavy metals removal [103]. Knowing that fact, the high price and limited reusability are the key problems deterring the extensive application of a commonly used adsorbent, activated carbon [104]. In that perspective, biosorption has surfaced as a promising method with a high efficiency even at minute amounts, low cost, no additional nutrient requirements, easy handling, as well as zero detrimental effects towards the environment [105,106] Therefore, seaweed with the abovementioned criteria and together with its natural ecosystem balancing role has stimulated research conducted abundantly on varying types of seaweed to access the adsorbent performances and efficiencies in removing heavy metals in different wastewaters.…”

Development of Ultra-Performance Liquid Chromatography–Mass Spectrometry Method for Simultaneous Determination of Three Cationic Dyes in Environmental Samples

“…Going through the literature, it was found that the pistachio shell and similar types of lignocellulosic material are used for the adsorption studies of these dyes. In the literature, pistachio shell is also reported to have a wide range of adsorptive applications, ranging from dyes to heavy metals; thus, pistachio shell was selected as the SPE material [ 41 , 42 , 43 , 44 ]. To prepare the solid-phase material, pistachio shells were collected and washed, followed by drying till removal of the moisture content.…”