The Impact of Surface Properties of Modified Pine Bark on the Mechanism of Sorption of Heavy Metals from Aqueous Media

被引：3
|
作者：
Khokhotva, O. P. [1 ]
Westholm, L. J. [2 ]
机构：
[1] Natl Tech Univ Ukraine, Igor Sikorsky Kiev Polytech Inst, Kiev, Ukraine
[2] Malardalen Univ, Vasteras, Sweden
来源：
JOURNAL OF WATER CHEMISTRY AND TECHNOLOGY | 2017年 / 39卷 / 03期
关键词：
adsorption; modification; model of surface complexation; pine bark; heavy metals; NICA-DONNAN MODEL; COMPLEXATION MODEL; ADSORPTION; IONS; BINDING; ACIDS; PROTON; SOILS;
D O I：
10.3103/S1063455X17030055
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The surface properties of pine bark before and after the treatment with urea solution and the adsorption of Cu(II), Ni(II) and Zn(II) from aqueous solutions at different pH values have been studied. Types of active sorption sites, their surface concentration and change after the bark treatment with urea solution were determined. The results of potentiometric titration were processed by using ProtoFit and FITEQL software programs. The data obtained make it possible to conclude that in the extraction mechanism of heavy metals from water the share of ion exchange decreases and the share of complexation increases. The impact of alkaline and alkaline earth metals in the range of their concentrations up to 3000 mg/dm(3) on Cu(II) extraction from model aqueous solutions was also investigated.
引用
收藏
页码：148 / 154
页数：7
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