A pilot level approach to remove anionic species from industrial effluents using a novel carbonate-steam pyrolysed activated charcoal system |
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Authors: | Harsha Mahadevan A.R. Nayana V. Viswadas Sibin Antony Vinu V. Dev Sandhya Sudhakaran Helan Priya Pious K. Anoop Krishnan |
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Affiliation: | 1. Hydrological Processes (HyP) Group, National Centre for Earth Science Studies (NCESS), Akkulam, Trivandrum 695011, India;2. University of Kerala, Trivandrum, India;3. Department of Chemistry, Mahatma Gandhi College, Kesavadasapuram, Trivandrum 695004, India;4. Department of Chemistry, St. Berchmans College, Changanassery, Kottayam 686101, India |
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Abstract: | In our laboratory, we synthesized a novel surface tailored activated charcoal in removing nitrite species from fertilizer industrial effluents. A customized high temperature carbonate-steam activation technique was adopted to develop the sodium carbonate impregnated activated charcoal (SCIAC). The surface properties of the material were determined using SEM, TG and X-RD techniques. Batch adsorption experiments were performed for optimizing various conditions such as solution pH, contact time, temperature and adsorbent dose for maximizing the nitrite adsorption onto SCIAC. Considerably, a very high nitrite adsorption percentage of 83.8 was obtained for an initial nitrite concentration of 5.0?mg/L at pH 3.0. Among the various equilibrium and kinetic models, Freundlich and pseudo-second-order expressions, respectively, were well enough to explain the adsorption processes. In general, it may conclude that the change in surface characteristics of the adsorbent material after the pyrolysis process is highly favorable for effective removal of nitrite ions from aqueous systems. Adsorption capacity of SCIAC was 27.03?mg/g and studies revealed that the material was feasible in removing nitrite from industrial effluents. |
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Keywords: | Adsorption Industrial effluents Nitrite Charcoal Pyrolysis |
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