Efficient biosorption of hexavalent chromium from water by modified arecanut leaf sheath

• DOI: 10.1016/j.heliyon.2022.e09283
• Publication Date: 2022-04-19T17:28:01Z
• Authors: Bishnu Datt Pant; Deepa Neupane; Dasu Ram Paudel; Prakash Chandra L...; Surendra Kumar Ga...; Megh Raj Pokhrel; Bhoj Raj Poudel
• Keywords: Biosorption; Hexavalent Chromium; Langmuir adsorption model

In this work, the excision of hexavalent chromium (Cr(VI)) was studied from an aqueous solution using chemically modified arecanut leaf sheath (CALS) as a novel bio-adsorbent. The as-prepared adsorbent characterized by instrumental methods including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy dispersive (EDS). effect several factors, pH, contact time, sorbent dosages were examined to identify optimum condition for sorption ability. optimal pH Cr(VI) biosorption 2.0, equilibrium reached in 150 min. Adsorption shown be pseudo-second-order kinetic investigations, Langmuir isotherm with maximal adsorption efficiency determined 109.89 mg/g. spent biosorbent can easily regenerated reused. For oxyanions chromium, both electrostatic attraction ligand exchange mechanism play critical roles. From results, CALS appears potential low-cost effective remove Cr (VI) water.