Use of Orange Peel Waste for Arsenic Remediation of Drinking Water

Abstract

Arsenic is a toxic element and is found in natural waters throughout the globe. The purpose of present study is to demonstrate the As (V) uptake by orange peel from real ground water samples through adsorption. Different parameters such as pH, shaking speed, contact time, adsorbent dosage, concentration, volume and temperature etc, were optimized. The maximum uptake capacity was observed at pH-7. The sorption was found to be time dependent and the kinetics followed well by the Morrisweber, Pseudo second order and Elovich equations. The Freundlich, Langmuir, Dubinin Redushkevich and FloryHuggins isotherm were used to model the adsorption behavior of arsenic retention. Thermodynamic parameters calculated from these isotherms show that the adsorption was spontaneous and endothermic in nature. Orange peel was found to be effective (*85%) for arsenic removal from real water systems containing concomitant ions.

Preparation and characterization of raw and carbon from banana peel by microwave activation: Application in citric acid adsorption

“…A better fit to the pseudo-second-order kinetic model indicates that the rate of adsorption is more dependent on the availability of the adsorption sites instead of the CA concentration in the solution [49]. As can be seen in Table 4, the Elovich kinetic model fits the experimental data well, which indicates that chemisorption may be one of the rate-determining steps involving valance forces through electron exchange [50].…”

Agricultural waste peels as versatile biomass for water purification – A review

“…Besides these, several other researchers also examined orange peels as adsorbents for different aquatic pollutants removal [39][40][41][42][43][44].…”

Fruit peel waste as a novel low-cost bio adsorbent

“…The physico-chemical parameters of different isotherms, together with the fundamental thermodynamic assumptions, help to understand the adsorption mechanism, the surface properties of the adsorbate, and the degree of affinity (Ho et al 2002, Behnamfard and Salarirad 2009, Foo and Hameed 2010Tümsek and Avcı 2013). FPW batch adsorption data for different systems have been fitted to a wide variety of equilibrium isotherms, like Langmuir, Freundlich, Sips, Redliche-Peterson, Temkin, Dubinin-Raduskevich, Dubinine-Kaganere-Radushkevich, Toth, Koble-Corrigan, Harkins-Jura, Flory-Huggins, ion exchange, generalized isotherm, Langmuir-Hinshelwood, and BET, and used for modeling FPW-adsorption systems data (Perez-Marın et al 2007, Khaled et al 2009a, Marín et al 2009, Khaskheli et al 2011, Foo and Hameed 2012, Zou et al 2012.…”