Study on Adsorption Properties of Modified Corn Cob Activated Carbon for Mercury Ion

Yuyingnan Liu, Xinrui Xu, Bin Qu, Xiaofeng Liu, Weiming Yi and Hongqiong Zhang
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Yuyingnan Liu: College of Engineering, Northeast Agriculture University, Harbin 150030, China
Xinrui Xu: College of Engineering, Northeast Agriculture University, Harbin 150030, China
Bin Qu: College of Engineering, Northeast Agriculture University, Harbin 150030, China
Xiaofeng Liu: Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
Weiming Yi: College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Hongqiong Zhang: College of Engineering, Northeast Agriculture University, Harbin 150030, China

Energies, 2021, vol. 14, issue 15, 1-22

Abstract: In this study, corn cob was used as raw material and modified methods employing KOH and KMnO 4 were used to prepare activated carbon with high adsorption capacity for mercury ions. Experiments on the effects of different influencing factors on the adsorption of mercury ions were undertaken. The results showed that when modified with KOH, the optimal adsorption time was 120 min, the optimum pH was 4; when modified with KMnO 4 , the optimal adsorption time was 60 min, the optimal pH was 3, and the optimal amount of adsorbent and the initial concentration were both 0.40 g/L and 100 mg/L under both modified conditions. The adsorption process conforms to the pseudo-second-order kinetic model and Langmuir model. Scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Zeta potential characterization results showed that the adsorption process is mainly physical adsorption, surface complexation and ion exchange.

Keywords: mercury ion; corn cob; activated carbon; adsorption (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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