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Selective removal and recovery of Fe(III) by garlic residue gel adsorption
Xue Jiehao 1,Zhang Yangzhong 2,Meng Yeping 2,Zhou Hongyu 2,Huang Ying 2,Liu Junyou 2,Yin YanLi 2,Huang Kai 2 *
1.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083;Institute of Emerging Industrial Technology, University of Science and Technology Beijing, 100083;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083;Institute of Emerging Industrial Technology, University of Science and Technology Beijing, 100083;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 100083
2.
*Correspondence author
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Funding: Beijing Education Committee Foundation (No.No.11140065)
Opened online: 8 November 2018
Accepted by: none
Citation: Xue Jiehao,Zhang Yangzhong,Meng Yeping.Selective removal and recovery of Fe(III) by garlic residue gel adsorption[OL]. [ 8 November 2018] http://en.paper.edu.cn/en_releasepaper/content/4746268
 
 
Removal of iron in hydrometallurgical processes is a quite popular challenge, and the traditional methods such as precipitation may cause severe secondary pollution and resources waste. In present study, we attempted a cheap and effective technique to remove the iron ions by adsorption onto garlic residue gels. A simple chemical modification method to modify the peel by calcium hydroxide was proposed. Results showed that the optimal equilibrium pH is about 2.5 for 90 % adsorption without the hydrolysis of Fe(III). Adsorption equilibrium was attained within 60 min. The adsorption process can be described well by Langmuir model and pseudo-second-order kinetic equation, respectively. The maximum adsorption capacity for Fe(III) ions was found to be 1.4 mol/kg. The sulfenic acid, pectic acid, polyphenolic and alliin components contained in the garlic peel are inferred to be the main ligands responsible for the uptake of Fe(III) ions onto the gel. The simulated solutions referring to the hydrometallurgical process of nickel and copper were prepared to test the selective removal behavior of Fe(III), and the possibility of recovery and reuse of the adsorbed iron was also discussed. The present work may help to recycle and reuse the huge amount of iron resources in the real hydrometallurgical processes, and also bring a more ecofriendly, cleaner and shortened process for many traditional hydrometallurgical processes.
Keywords:Iron adsorption; Garlic wastes; Hydrometallurgy; Pollution abatement; Zero-valent iron
 
 
 

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