Removal of Heavy Metal Ions from One- and Two-Component Solutions via Adsorption on N-Doped Activated Carbon

被引:18
作者
Kazmierczak-Razna, Justyna [1 ]
Ziola-Frankowska, Anetta [2 ]
Nowicki, Piotr [2 ]
Frankowski, Marcin [2 ]
Wolski, Robert [2 ]
Pietrzak, Robert [2 ]
机构
[1] Lukasiewicz Res Network Inst Nonferrous Met, Div Poznan, Cent Lab Batteries & Cells, Forteczna 12, PL-61362 Poznan, Poland
[2] Adam Mickiewicz Univ, Fac Chem, PL-61614 Poznan, Poland
关键词
brown coal; activated carbons; chemical activation; ammoxidation; heavy metals; simultaneous adsorption; AQUEOUS-SOLUTIONS; CHEMICAL ACTIVATION; COPPER SPECIATION; BIOSORPTION; SORPTION; CU(II); ZINC; EQUILIBRIUM; ADSORBENTS; COMPOSITE;
D O I
10.3390/ma14227045
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
This paper deals with the adsorption of heavy metal ions (Cu2+ and Zn2+) on the carbonaceous materials obtained by chemical activation and ammoxidation of Polish brown coal. The effects of phase contact time, initial metal ion concentration, solution pH, and temperature, as well as the presence of competitive ions in solution, on the adsorption capacity of activated carbons were examined. It has been shown that the sample modified by introduction of nitrogen functional groups into carbon structure exhibits a greater ability to uptake heavy metals than unmodified activated carbon. It has also been found that the adsorption capacity increases with the increasing initial concentration of the solution and the phase contact time. The maximum adsorption was found at pH = 8.0 for Cu(II) and pH = 6.0 for Zn(II). For all samples, better fit to the experimental data was obtained with a Langmuir isotherm than a Freundlich one. A better fit of the kinetic data was achieved using the pseudo-second order model.
引用
收藏
页数:17
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