Enhanced Chromium (VI) Adsorption onto Waste Pomegranate-Peel-Derived Biochar for Wastewater Treatment: Performance and Mechanism

• DOI: 10.3390/toxics11050440
• Publication Date: 2023-05-08T06:29:22Z
• Authors: Yingzhou Chen; Jinyan Yang; Adil Abbas
• Keywords: Langmuir adsorption model; Chemisorption; Chemical modification

Surface chemical modification allows for the rational construction of biochar with desirable structures and functionalities environment purification. Fruit-peel-derived adsorbing material has been well studied in adsorption heavy-metal removal due to its abundance non-toxicity, but precise mechanism removing chromium-containing pollutants remains unclear. Herein, we explored potential application engineered prepared from fruit waste via remove chromium (Cr) an aqueous solution. By synthesizing two types agricultural residue-derived adsorbents, including pomegranate peel adsorbent (PG) modified product, pomegranate-peel-derived (PG-B), thermal decomposition methods, elucidated property Cr(VI) on materials identified cation retention process. Batch experiments varied characterizations demonstrated that superior activity was exhibited PG-B, which can contribute porous surfaces caused by pyrolysis effective active sites resulting alkalization. The highest capacity is obtained at pH 4, a dosage 6.25 g L−1, contact time 30 min. maximum efficiency 90.50% short period (30 min) while PG reached performance 78.01% 60 results kinetic isotherm models suggested monolayer chemisorption dominated Langmuir 16.23 mg g−1. This study shortened equilibrium pomegranate-based biosorbents presents positive significance designing optimizing fruit-peel-derived water