期刊
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
卷 111, 期 -, 页码 263-269出版社
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.psep.2017.06.016
关键词
Biosorption; Modified beer lees; Fixed-bed column; Pb(II); Zn(II)
资金
- National Major Science and Technology Program for Water Pollution Control and Treatment of China [2015ZX07205-003]
Continuous fixed-bed column studies for Pb(II) and Zn(II) simultaneous removal from aqueous solutions were carried out by using the modified beer lees as an absorbent. The effects of weight of adsorbent in each depth of the bed, flow rate and initial concentration were examined. The results show that the adsorption capacity of Pb(II) and Zn(II) both increase with the increase in the influent concentration, and decrease with the increasing of the packing weight of adsorbent and flow rate. Under the optimum conditions with Pb(II) and Zn(II) concentration of 30 mg/L and 15 mg/L, the adsorbent's packing weight of 4 g, and the flow rate of 1.0 mL/min, the adsorption capacity of Pb(II) and Zn(II) can reach 29.6 mg/g and 5.43 mg/g, respectively. The coefficients of Bed Depth Service Time and Yoon-Nelson models are all above 0.95, which is suitable to describe the continuous adsorption process of Pb(II) and Zn(II) by the modified beer lees and to predict effluent data in column operation under different experimental conditions. The results of EDX confirm that the Pb(II) and Zn(II) ions presence on the surface of the modified beer lees after adsorption process and the FTIR analysis identifies the hydroxyl, aliphatic acids and carboxyl functional groups as the active binding sites for Pb(II) and Zn(II) ions adsorption. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据