A magnetic nanocomposite produced from camel bones for an efficient adsorption of toxic metals from water. (20th March 2018)

• Record Type: Journal Article
• Authors: Alqadami, Ayoub Abdullah; Khan, Moonis Ali; Otero, Marta; Siddiqui, Masoom Raza; Jeon, Byong-Hun; Batoo, Khalid Mujasam
• Is Part Of: Journal of cleaner production. Volume 178(2018)
• Page Start: 293
• Page End: 304
• Publication Date: 2018-03-20
• Subjects: Nanomagnetic adsorbent -- Biochar -- Camel bones -- Sustainable waste management -- Heavy metals -- Water treatment; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.01.023
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: A new, simple, clean, and green procedure for the production of a magnetic nanocomposite (MBBC) from waste camel bone biochar was here described. MBBC particles were in the nano-size range (∼12 nm), having characteristics of both hydroxyapatite and magnetite. The produced nanocomposite was characterized by FT-IR, XRD, TG, SEM, TEM, BET, XRD, Zeta potential and XPS analyses. MBBC exhibited a paramagnetic behavior, having a saturation magnetization of 50.20 emu/g and a mesoporous structure with a BET surface area of 162 m 2 /g. The FT-IR spectrum of MBBC displayed doublet peaks at 573–601 cm −1 (corresponding to Fe–O vibrations) and a peak at 1046 cm −1 (associated with HPO4 ), which support the successful formation of MBBC. The maximum adsorption capacities of MBBC, as for the Langmuir isotherm model fittings, were 344.8, 322.6 and 294.1 mg/g for Pb(II), Cd(II) and Co(II), respectively. MBBC showed rapid heavy metals adsorption rates, accomplishing ∼75% adsorption within 5 min. After adsorption accomplishment, MBBC particles were magnetically separated from treated water and heavy metals from saturated MBBC were efficiently desorbed by elution with 0.01 M HCl. Under such elution, the MBBC stability against acid leaching of Fe was proved. Hence, it could be inferred that the production of MBBC from waste camel bones and its utilization for the removal of heavy metals from water is a novel approach within the cleaner production concept. Graphical abstract: Image 1 Highlights: A magnetic nanocomposite (MBBC) was produced from waste camel bone biochar. MBBC was ∼12 nm particle size, paramagnetic and mesoporous with 162 m 2 /g BET area. Pb(II), Cd(II) and Co(II) adsorption capacities on MBBC were 345, 323 and 294 mg/g. Metals recovery from saturated MBBC was maximum (85–90%) with 0.01 M HCl. Deniable leaching of Fe occurred from MBBC during desorption with 0.01 M HCl.