Journal of Food Processing & Technology

Cashew Apple Juice Preservation � An Integrated Approach for Shelf life Enhancement

Uma Talasila, Rama Rao Vechalapu and Shaik Khasim Beebi

GITAM University, India

: J Food Process Technol

Abstract:

The present work describes the biosorption of Cu+2 on green algae Ulva fasciata, biomass investigated in the batch mode. The effect of various parameters like solution pH (4-6), initial metal concentration (60- 140 mg/L), biomass weight (0.08-0.40 g/L) and temperature (20-40°C) on adsorption efficiencies were studied using two level four factor (24) full factorial centralcomposite design with Statistica 6.0. The predicted results thus obtained were found to be good agreement (R2 = 0.965) withthe results obtained by performing experiments. Optimum Cu+2 adsorption %77.89 was achieved at initial copper ionconcentration of 80 mg/L, U. fasciata biomass weight of 5.28 g/L and 35°C temperature with pH 5.245. tudies indicate theinvolvement of �??CO, -OH and N-H functional groups present on the biomass surface in the sorption of Cu+2 ions. The approximate pore size of biosorbent was 4-10 μm and multilayered inner walls were readily involved in biosorption of Cu2+ions. XRD pattern revealed the change of biomass structure due to biosorption of Cu2+ ions on U. fasciata. The maximum monolayer biosorption capacity of U. fasciata for Cu+2 was found to be 35.81mg g�??1. The equilibrium biosorption data wereevaluated by Langmuir, Freundlich, Langmuir-Freundlich (L-R) and Reddlich-Peterson isotherm models. U. Fasciata biomass appears to be a promising material for the removal of heavy metal ions from industrial wastewaters