Data on the removal of metals (Cr3+, Cr6+, Cd2+, Cu2+, Ni2+, Zn2+) from aqueous solution by adsorption using magnetite particles from electrochemical synthesis

• Published in: Data in brief 2019-06, Vol.24, p.103956-103956, Article 103956
• Main Authors: Jorge, Manrique-Julio, Nilson, Marriaga-Cabrales, Aracely, Hernández-Ramírez, Machuca-Martínez, Fiderman
• Format: Article
• Language: English
• Subjects: Chemical Engineering
• ISSN: 2352-3409; 2352-3409
• DOI: 10.1016/j.dib.2019.103956

Magnetic materials are promising adsorbents for removing heavy metals from polluted wastewaters. Magnetite particles were prepared by electrolytic synthesis (average crystallite size 37.9±1.2 nm, surface area = 17.2 m2g−1, isoelectric point = 6.3, magnetic saturation = 62 emu g−1) and used as adsorbent of heavy metals in aqueous solutions. The adsorption capacity of the magnetite was highly dependent on pH value, for Cd+2, Zn+2, Ni+2 and Cu+2 the removal performance was higher that 80% at pH = 8. For Cr+6, the acid pH showed removal percentage higher that 90%. The adsorbent was separated from the system, reactivated and reused in subsequent tests using batch adsorption. It was found that removal efficiencies were higher than 70% even during a third cycle of adsorption. Finally, the kinetic behavior of the adsorption of each adsorbate was described by a first-order. The range of values of qe(mg/g) and k (min−1) were 1.3166–1.6367 and 0.0377 to 0.0826 respectively.