Continuous Flow Column Study on Biosorption of Reactive Dyes Using Cationic Protein from Moringa oleifera Seeds

Abstract

Dyes which are produced articially or naturally in fixing colour to the fabrics cause major pollution in waterbodies. Though many eco-friendly adsorbents are used for removal of dye from wastewater, the potential use of Moringa oleifera Seed Powder (MOSP) in removal of dye has been studied in this paper. Batch experiments were conducted to determine the optimum quanity of MOSP by varying pH, dye concentration, contact time and quanity of MOSP. The adsorptive capacity of MOSP was determined by fitting the adsorption data using Langmuir and Freundlich isotherm models. The column studies were carried using the optimum value of MOSP to determine the time and volume of waste water that can be treated. From the batch studies, it was observed that 0.25 g of MOSP was found to be optimum. Also it was perceived that adsorption data were well correlated with Langumiur isotherm with coefficient of determination of 0.8207 and dye removal efficiency of more than 97%. From colunm studies, it was observed that steady state was reached after collection of 741 ml and 904 ml of treated water with dye concentration of 71 ppm