Abstract
Treatment of heavy metals containing industrial effluent becomes quite necessary before being discharged to the environment. In this study, potential of carbon nanospheres (CS) and silica nanospheres (SS) for the adsorption of heavy metals were tested. SS were synthesized by the Stӧber process and CS were synthesized by a slightly modified Stӧber process. Products obtained were tested with Scanning Electron Microscope to identify their spherical shape. N2 adsorption-desorption analysis was conducted to measure the specific surface area and porosity. SS showed higher total pore volume compared to that of CS and CS showed higher specific surface area compared to SS. Adsorption capacities of both particles were tested for lead ions (Pb2+) through equilibrium and kinetic studies. SS showed a better adsorption capacity than CS. Results show no substantial difference. So, both can be used as effective adsorbents to remove heavy metals in wastewater. This study can be extended to obtain the best material which has a greater adsorption capacity by adjusting synthesis conditions.
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