共 34 条
Biosorption of methylene blue by natural and chemical modified wheat straw in fixed-bed column
被引:18
作者:
Ren, Xiaofeng
[1
]
Zhang, Xiaona
[1
]
Zhang, Lijun
[1
]
Han, Runping
[1
]
机构:
[1] Zhengzhou Univ, Sch Chem & Mol Engn, Zhengzhou 450001, Peoples R China
基金:
中国国家自然科学基金;
关键词:
Wheat straw;
Modified wheat straw;
Methylene blue;
Column adsorption;
Model;
LOW-COST ADSORBENTS;
AQUEOUS-SOLUTIONS;
ACTIVATED CARBON;
WASTE-WATER;
DYE REMOVAL;
NEUTRAL RED;
ADSORPTION;
BATCH;
EQUILIBRIUM;
KINETICS;
D O I:
10.1080/19443994.2012.741776
中图分类号:
TQ [化学工业];
学科分类号:
0817 ;
摘要:
Adsorption of methylene blue (MB) from aqueous solution was studied by natural wheat straw (NWS) and modified wheat straw (MWS) with citric acid in fixed-bed column. The experiments were conducted to investigate the effects of the bed depth, the flow rate, and the influent concentration of MB. The column data were fitted by the Thomas model and Yan model using nonlinear regressive analysis, while bed depth/service time analysis (BDST) model was applied at different bed depths. The Yan and BDST were found suitable for describing the adsorption process. The exhausted adsorbent was regenerated using hydrogen chloride solution and the adsorbent was reused. The results showed that the adsorption capacity of MWS was higher than NWS and both NWS and MWS can be reused.
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页码:4514 / 4523
页数:10
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