共 40 条
Synthesis of hydrous zirconium oxide-impregnated chitosan beads and their application for removal of fluoride and lead
被引:68
作者:
Cho, Dong-Wan
[1
]
Jeon, Byong-Hun
[2
]
Jeong, Yoojin
[1
]
Nam, In-Hyun
[3
]
Choi, Ui-Kyu
[4
]
Kumar, Rahul
[2
]
Song, Hocheol
[1
]
机构:
[1] Sejong Univ, Environm & Energy Dept, Seoul 143747, South Korea
[2] Hanyang Univ, Dept Nat Resources & Environm Engn, 222 6 Wangsimni Ro, Seoul 133791, South Korea
[3] Korea Inst Geosci & Mineral Resources KIGAM, Geol Environm Div, Daejeon, South Korea
[4] Mine Reclamat Corp, Coal Ctr, 2 Segye Ro, Wonju 16464, Gangwon Do, South Korea
基金:
新加坡国家研究基金会;
关键词:
Hydrous zirconium oxide;
Chitosan beads;
Fluoride;
Lead;
Sorption;
AQUEOUS-SOLUTION;
CU(II) IONS;
ADSORPTION;
PB(II);
COMPOSITE;
CD(II);
WATER;
DEFLUORIDATION;
NANOPARTICLES;
PHOSPHATE;
D O I:
10.1016/j.apsusc.2016.03.068
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A composite adsorbent capable of simultaneous removal of both cationic and anionic contaminants from aqueous solutions was developed by impregnating hydrous zirconium oxide (HZO) into chitosan beads (CB). The optimal mass ratio of chitosan to HZO was 2:2. The composite adsorbent (HZOCB) had the rugged surface (52.74 m(2) g(-1)) with irregular cracks caused by HZO inclusion and amine functional groups. The rate of Pb2+ adsorption by HZOCB was relatively rapid. Most of Pb2+ (89%) was adsorbed within 2.5 h. A binary sorbate system was noticeably favorable for F- adsorption as compared to single sorbate system. Adsorption of F- and Pb2+ followed pseudo-second order kinetics. The maximum sorption capacities obtained from Langmuir isotherm model were 22.1 and 222.2 mg g(-1), respectively. The study demonstrates that the developed composite could be a potential adsorbent for the simultaneous remediation of F- and Pb2+ contamination in water. (C) 2016 Elsevier B.V. All rights reserved.
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页码:13 / 19
页数:7
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