Using Synthesized Polysiloxane Modified with Nitrophenyl as a Low Cost Adsorbents For Nickel Removal From Wastewater

The aim of this study was to investigate the removal of Ni(II) using synthesized polysiloxane modified with ortho, meta and para nitrophenyl. The scope of the work included batch equilibrium, adsorption isotherm studies and kinetic studies at varying pH (2-12), contact time, sorbent dosages (5-10 mg) and initial metal ion concentration (5-50 mg/L). The development of batch kinetic model and determination of order, desorption studies were investigated. The maximum removal of Ni(II) is found to be 89.6 % at pH 8, The best removal was of 94% at temperature = 10 oC. The removal of nickel followed Langmuir model adsorption and was pseudo second order. The capacity of the first and second regenerated polymer for removal of nickel showed 84.3 and 82.9 % for the second and third generation respectively