Utilization of biochar sorbents for Cd2+, Zn2+, and Cu2+ ions separation from aqueous solutions: comparative study

被引：73
|
作者：
Fristak, Vladimir [1 ,2 ]
Pipiska, Martin [1 ]
Lesny, Juraj [1 ]
Soja, Gerhard [2 ]
Friesl-Hanl, Wolfgang [2 ]
Packova, Alena [3 ]
机构：
[1] Univ SS Cyril & Methodius, Dept Ecochem & Radioecol, Trnava 91701, Slovakia
[2] Austrian Inst Technol GmbH, Dept Hlth & Environm, A-3430 Tulln, Austria
[3] Univ SS Cyril & Methodius, Dept Chem, Trnava 91701, Slovakia
来源：
ENVIRONMENTAL MONITORING AND ASSESSMENT | 2015年 / 187卷 / 01期
关键词：
Biochar; Feedstock; Sorption; Cd; Zn; Cu; HEAVY-METALS; HYDROTHERMAL CARBONIZATION; CO2+ IONS; REMOVAL; PYROLYSIS; SOIL; ADSORPTION; SORPTION; PB2+; TEMPERATURE;
D O I：
10.1007/s10661-014-4093-y
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The objective of this study was to study the utilization of two different woody-derived biochars for Cd2+, Zn2+, and Cu2+ ions separation from aqueous solutions. Physicochemical characterization confirmed the main differences in sorbent surface area and cation-exchange capacity. The maximum cadmium, zinc, and copper sorption capacities were 1.99, 0.97, and 2.50 mg g(-1) for biochar (BC) A; 7.80, 2.23, and 3.65 mg g(-1) for BC B. Sorption processes can be affected by time and pH. The most of sorbed cadmium and zinc were bound on exchangeable fractions and copper oxidizable fractions. Chemical modification and FT-IR analyses confirmed the crucial roles of hydroxyl and mainly carboxyl functional groups in sorption processes of Cd2+, Zn2+, and Cu2+ ions by BC A and BC B. The garden wood rests with leaf mass-derived biochar can be utilized as an effective sorbent for bivalent ions.
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页数：16
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