Optimization of Nickel(II) adsorption by sodium tripolyphosphate crosslinked chitosan using response surface methodology (RSM)

• DOI: 10.1016/j.scenv.2023.100019
• Publication Date: 2023-06-28T06:50:47Z
• Authors: Ataollah Babakhani; Majid Sartaj
• Keywords: Langmuir adsorption model

This study aimed to synthesize chitosan crosslinked by sodium tripolyphosphate with different concentrations and optimize it for Ni(II) adsorption in a batch system. The BET analysis the solubility/swelling test showed that as crosslinking degree increased, surface area total pore volume decreased while physicochemical properties improved. effect of initial pH temperature on was studied system, thermodynamic parameters were calculated. In order enhance capacity chitosan, Response Surface Methodology (RSM) employed establish correlation between two independent experimental factors, namely degree, capacity. By manipulating these aim chitosan. constructed model well-aligned data an R2 = 96.05%. According model, 31.94 mg/g could be achieved at 7.21 2.93% (w/v). Among isotherm models investigated, Langmuir found more appropriate studying maximum beads > beads. mechanism also investigated using FT-IR SEM-EDS techniques, implying amine groups primary sites metal ions uptake well reaction. A mixture NaCl H2SO4 release sorbed from STPP-CB5% recovery 83% after one sorption-desorption cycle.