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

Energies

Weiming Yi¹  Hongqiong Zhang²  Bin Qu²  Yuyingnan Liu²  Xinrui Xu²  Xiaofeng Liu³ 

[1] College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China;College of Engineering, Northeast Agriculture University, Harbin 150030, China;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;

关键词: mercury ion;    corn cob;    activated carbon;    adsorption;   

DOI  :  10.3390/en14154483

来源: DOAJ

【 摘 要 】

In this study, corn cob was used as raw material and modified methods employing KOH and KMnO₄ 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 KMnO₄, 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.

【 授权许可】

Unknown