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Study of Cadmium and Nickel Removal from Battery Industry Wastewater by Fe2O3 Nanoparticles | ||
Pollution | ||
مقاله 6، دوره 5، شماره 3، مهر 2019، صفحه 515-524 اصل مقاله (522.27 K) | ||
نوع مقاله: Original Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/poll.2018.268193.530 | ||
نویسندگان | ||
T. Shahriari* ؛ N. Mehrdadi؛ M. Tahmasebi | ||
School of Environment, College of Engineering, University of Tehran, Tehran, Iran | ||
چکیده | ||
Nickel and cadmium usually enter the environment and water resources through wastewater, released by various industries, and may have adverse effects. The current study employs α–Fe2O3 nanoparticles of 20-40 nm in order to remove nickel and cadmium from the wastewater of Saba Battery Company. Also, it investigates the influence of effective parameters on adsorption process, including pH, contact time, and the adsorbent rate so that it can optimize the adsorption process. The maximum adsorption rate of nickel and cadmium can be observed in pH ranges of 5 to 9. In addition, adsorption rates for nickel (at pH = 7) and for cadmium (at pH = 5) have been 92.98% and 93.97%, respectively. By increasing the adsorbent rate, the adsorption grows, due to the increase in absorbate surface area, and an optimum adsorbent rates of 0.15 g and 0.2 g are obtained for cadmium and nickel, respectively. The maximum nickel and cadmium adsorption rates occur during the first 60 min of contact with nanoparticles. In this study, adsorption kinetics and isotherms have also been investigated and it has been found that the adsorption kinetics of both nickel and cadmium ions follow the pseudo-second-order model, while adsorption isotherms of nickel and cadmium follow the Freundlich model. | ||
کلیدواژهها | ||
Adsorption isotherms؛ Adsorption Kinetics؛ Battery Industry؛ Heavy metals | ||
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