- Turkish Journal of Chemistry
- Vol: 41 Issue: 2
- Impact of surface modification of green algal biomass by phosphorylation on the removal of copper(II...
Impact of surface modification of green algal biomass by phosphorylation on the removal of copper(II) ions from water
Authors : Zakaria Al-qodah, Mohammad Al-shannag, Abdulaziz Amro, Eman Assirey, Mustafa Bob, Khalid Bani-melhem, Malek Alkasrawi
Pages : 190-208
View : 10 | Download : 4
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :A series of batch lab-scale experiments were performed to investigate the performance of dead phosphorylated algal biomass of Spirogyra species for the bioadsorption of Cu$^{+2}$ ions from aqueous solutions. FT-IR and SEM analyses were performed to characterize the phosphorylated and raw algae. The SEM analysis indicated that the phosphorus content increases by about 5 times. The isotherm equilibrium data indicated that phosphorylation enhances the removal of Cu$^{+2}$ from water by about 20%. The experimental isotherms fit well to Langmuir models with $R^{2}$ values close to 0.99. Adsorption kinetic study was conducted to investigate the effect of initial Cu$^{+2}$ concentrations, pH, and adsorbent dose on the loading capacity of algal biomass. The optimum pH for the process was around 6 and the corresponding maximum loading capacity was 65 mg/g. The pseudo second-order kinetics successfully modeled the kinetic results with $R^{2}$ values closed to 0.99. The thermodynamic results indicated that the bioadsorption process is endothermic and spontaneous at initial Cu$^{+2}$ concentrations lower than 100 mg/L. The results were promising and encourage the design of a continuous process using algal biomass to remediate water polluted with heavy metals.Keywords : Copper removal, algae, Spirogyra, adsorption isotherms, bioadsorption, adsorption kinetics, phosphorylation