To study the effectiveness of modified surface of lignocellulosic material for the removal of reactive red 223 by adsorption method

Water contamination is increasing day by day that not only alarming to human beings, but it is also alarming for animals, plants and aquatic life. The discharge of Industrial wastes in the main water channels which contain large amount of chemicals, pesticides and metal pollutants. The present study emphasizes towards the water pollution and composite present in waste water like dyes, which are the major constituents of industrial effluent. The removal of contents was carried out by using a low cost adsorbent. The carbonized coir pith (CCP) was used for removal of Reactive Red 223 dye. Batch adsorption experiments were adopted for investigating the removal of Reactive Red 223(RR 223) dye. The overall experimental procedures were carried out as a function of initial dye concentration, contact time, adsorbent dose temperature and pH. Adsorption data were analyzed by Langmuir, Freundlich, Dubnin–Radushkevich, isotherms. The maximum %removal of RR 223 was found to be 99.06% in 40 minutes with the initial concentration of dye 1.15×〖10〗^(-4)M at 313K. The results showed that adsorption of RR 223 on CCP follows Langmiur isotherm model. Thermodynamic parameters such as free energy (ΔGo), enthalpy (ΔHo), and entropy (ΔSo) of the system were calculated. Thermodynamics data showed that the adsorption was spontaneous and endothermic. The Kinetics study revealed that the CCP-RR 223 system followed the pseudo second order reactions. Analytical techniques like Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) was also employed for investigation of functional group and surface morphology. pH at point zero charge of carbonized coir pith was determined by employing pH drift method. photocatalytic activity was also investigated.