Acid-treated Pomegranate Peel; An Efficient Biosorbent for the Excision of Hexavalent Chromium from Wastewater

Overview

Journal Heliyon

Specialty Social Sciences

Date 2023 May 9

PMID 37159700

Authors

Rajan Rai

Ram Lochan Aryal

Hari Paudyal

Surendra Kumar Gautam

Kedar Nath Ghimire

Megh Raj Pokhrel

Bhoj Raj Poudel

Affiliations

Soon will be listed here.

Abstract

We studied the sequestration of hexavalent chromium Cr(VI) from an aqueous solution using chemically modified pomegranate peel (CPP) as an efficient bio-adsorbent. The synthesized material was characterized by X-ray diffraction spectroscopy (XRD), Fourier-transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). The impacts of parameters like solution pH, Cr(VI) concentration, contact time, and adsorbent dosage were investigated. Experimental results of the isotherm studies and adsorption kinetics were found agreeing to the Langmuir isotherm model and pseudo-second-order kinetics, respectively. The CPP showed appreciable Cr(VI) remediation capacity with a maximal loading capacity of 82.99 mg/g at pH 2.0, which was obtained in 180 min at room temperature. Thermodynamic studies revealed the biosorption process as spontaneous, feasible, and thermodynamically favorable. The spent adsorbent was eventually regenerated and reused, and the safe disposal of Cr(VI) was ensured. The study revealed that the CPP can be effectively employed as an affordable sorbent for the excision of Cr(VI) from water.

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