Photo catalytic degradation of methylene blue and methyl orange from aqueous solution using solar light onto chitosan bi‑metal oxide composite

摘要

Chitosan bi-metal oxide (CBMO) is prepared by co-precipitation method to determine the degradation ability of methylene blue (MB) and methyl orange (MO) dyes using solar light irradiation. The characteristics of CBMO are studied by FTIR, UV, SEM, EDX and XRD studies. The photocatalytic degradation of studies MB and MO were carried out by varying the parameters such as pH, irradiation time, dye concentration, composite dosage. The photo catalytic study shows the maximum percentage of degradation at pH 8 for MB and 3 for MO at irradiation time of 120 min and 0.15 g of CBMO and is confirmed by UV spectral studies. Based on the equilibrium data value Langmuir isotherm is well fitted, which indicates the formation of strong monolayer and it obeys pseudo second order kinetic model. Among methylene blue and methyl orange dyes, methyl orange was highly degraded (74.05%) by the chitosan-bimetal oxide adsorbent. And also 62.05% of dyes can be removed from industrial waste water by CBMO. According to the experimental results it is clearly evident that the chitosan-bimetal oxide composite is expected to be an effective product for the remediation of dyes from waste water.