Document Type : Regular Article
Authors
1
Department of Medical Instruments Engineering, Al-Maarif University College, Al Anbar, Iraq.
2
Lecturer Mathematics and Sciences Dhofar University SALALAH Oman
3
Department of Engineering, College of Computer Science, King Khalid University, Main Campus Al farah Abha 61421, Kingdom of Saudi Arabia KSA
4
Department of Biotechnology and Genetics, School of Sciences, JAIN (Deemed to be University), Bangalore, Karnataka, India
5
DSc Manipur International University, Imphal, Manipur, India
6
Department of Pharmacy, Kut University College, Kut 52001, Wasit , Iraq
7
Al-Nisour University College/Baghdad/Iraq
8
college of pharmacy/ National University of Science and Technology, Dhi Qar, Iraq
9
Universidad Nacional de San Cristóbal de Huamanga, Ayacucho, Perú
10
Universidad de Ciencias y Artes de América Latina, Av. La Molina 3755, Lima, 15026, Perú
Abstract
The sorption potential of eggshell nanoparticles as a cheap sorbent was studied in the removal of cobalt ions from aqueous solutions. Also, SEM, BET, and DLS analyzes were employed to measure the features of eggshell nanoparticles. The highest uptake efficiency was 97.43%, which was attained at stirring rate of 200 rpm, 4 g/L eggshell dose, Co(II) ion concentration of 20 ppm, temperature of 30 oC, and pH 6. Also, the pseudo-second-order kinetic model could describe the kinetic behavior of Co(II) ions adsorption better than the pseudo-first order and intraparticle diffusion kinetic models. Further, the eggshell sorbent showed significant reusability, so that the removal efficiency of Co(II) after 4 reutilize cycles did not change significantly and could remain its removal efficiency above 90%. Moreover, the adsorbent was able to eliminate effectively contaminants such as BOD5, COD, and heavy metal ions from a real wastewater. Additionally, the influence of interfering ions including Zn(II), Pb(II), Cr(III) and Cr(VI), Hg(II), and As(III) was studied on the sorption performance of Co(II) ions, and the results revealed that Pb(II) and As(III) had the highest and lowest sorption efficiency, respectively.
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