Adsorption kinetics and mechanisms of copper ions on activated carbons derived from pinewood sawdust by fast H3PO4 activation

被引：48

作者：

Gao, Xinyuan ^{[1
]}

Wu, Long ^{[1
]}

Xu, Qing ^{[1
]}

Tian, Wei ^{[1
]}

Li, Zhanyong ^{[1
]}

Kobayashi, Noriyuki ^{[2
]}

机构：

[1] Tianjin Univ Sci & Technol, Coll Mech Engn, Tianjin Key Lab Integrated Design & Online Monito, Tianjin 300222, Peoples R China

[2] Nagoya Univ, Dept Chem Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2018年 / 25卷 / 08期

关键词：

Activated carbon; Fast H3PO4 activation; Copper adsorption; Adsorption mechanisms; Carboxyl groups; P-containing groups; PHOSPHORIC-ACID; AQUEOUS-SOLUTIONS; FUNCTIONAL-GROUPS; REMOVAL; MODEL; WATER; XPS; CU;

D O I：

10.1007/s11356-017-1079-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two kinds of pinewood sawdust activated carbon adsorbents were prepared by fast activation with H3PO4 in a spouted bed, and the application in adsorption of copper ions was investigated. With only 3 min of activation time, the BET surface area of activated carbons reached 1537.5 m(2)/g for impregnation mass ratio of H3PO4 to sawdust at 1:1 and activation temperature of 500 degrees C (IR1-500), whereas it was 1750.7 m(2)/g for the impregnation ratio at 4:1 and activation temperature of 800 degrees C (IR4-800). The pseudo second-order reaction kinetics well describes the experimental adsorption of copper ion in this study, indicating chemisorption dominated in the process. By the C-1s spectrum, activated carbons from IR1-500 contained more carboxyl groups (-COOH) and carbonyl groups (C=O), which played an important role in copper ions adsorption. In addition, it was found that the P-containing groups (metaphosphates) also involved in the adsorption of copper ion.

引用

页码：7907 / 7915

页数：9

共 31 条

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