WTERT-India is co-founded by the National Environmental Engineering Research
Institute (NEERI) and the Earth Engineering Center of Columbia University.
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Preparation and evaluation of Agro industrial Waste Carbon for effective removal of nickel from aqueous solutions

Industrial effluents have frequently been responsible for pollution caused in aquatic environments, especially those containing heavy metals, since these pollutants can easily be uptake by aquatic organisms, bioaccumulated and spread along the food chain. Ni(II) ion is one such heavy metal frequently encountered in raw wastewater streams from industries, such as non-ferrous metal, mineral processing, electroplating, porcelain enameling, copper sulfate manufacture, battery and accumulator manufacturing. Higher concentrations of nickel cause cancer of lungs, nose and bone. Conventional treatment processes, i.e. precipitation, chemical oxidation or reduction, ion exchange, reverse osmosis, membrane separations, electrochemical reaction and evaporation, have known interests but have also some limitations. The potential of cheap cellulose containing natural materials like agro industrial waste was assessed for Ni(II) adsorption form there aqueous solutions. Agro industrial waste carbon was prepared by treated with sulphuric acid. The equilibrium biosorption level was determined as a function of varying range of solution pH, biosorbent doses, contact time, initial metal ion concentration and temperature.The sorption data has been correlated with Langmuir, Freudlich, Dubinin-Radush kevich (D-R) and Temkin adsorption models. It was found that Langmuir model fitted well to the data. The kinetics data were analyzed by using kinetic models particularly pseudo-first-order and pseudo-second-order. The pseudo-second-order kinetic model was found to agree well with the experimental data. Maximum nickel removal was observed was 84.2% for dilute solutions at 20 g/L adsorbent dose at pH 6.0. FTIR, SEM and EDAX were recorded before and after adsorption to explore the number and position of the functional groups available for Ni (II) binding on to the studied adsorbent and changes in surface morphology and elemental constitution of the adsorbent.  Reusability of the adsorbent was examined by desorption in which HCl eluted 59.68 % Ni(II).

Keywords: Ni(II), FTIR, SEM, EDAX, Kinetic models

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Reports


1. Report of the Task Force on Waste to Energy (Volume I) (In the context of Integrated MSW Management) Click Here
2. Report of the Task Force on Waste to Energy (Volume II) Click Here


3. Energy from Waste – Clean, efficient, renewable: Transitions in combustion efficiency and NOx controlClick Here