Adsorption kinetics and desorption of Cu(II) and Zn(II) from aqueous solution onto humic acid

被引：163
|
作者：
Li, Ying [1 ]
Yue, Qinyan [1 ]
Gao, Baoyu [1 ]
机构：
[1] Shandong Univ, Shandong Key Lab Water Pollut Control & Resource, Sch Environm Sci & Engn, Jinan 250100, Shandong, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 178卷 / 1-3期
关键词：
Adsorption; Desorption; Kinetics; Humic acid; COPPER(II) ADSORPTION; COBALT DESORPTION; HEAVY-METALS; SORPTION; IONS; REMOVAL; SOIL; EXTRACTION; BEHAVIOR; CADMIUM;
D O I：
10.1016/j.jhazmat.2010.01.103
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The adsorption kinetics of Cu(II) and Zn(II) from aqueous solution onto humic acid (HA) were investigated under different conditions. The results showed that HA was particularly effective for adsorbing heavy metals and that the effective pH range was above 6. The adsorption force was not single and dependent on solution pH. The experimental data were found to comply with the pseudo-second-order kinetic model with adsorption capacity, gem more close to the measured results. Increment of initial adsorbate concentration (1-4 mg/L) and temperature (283-303 K) are both favorable to adsorption process. Based on the desorption experiments, it is further indicated that the main adsorption force was complexation effect between organic ligands of HA surface and metal ions and the percentage of desorption is 50% for Cu and 30% for Zn, respectively. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：455 / 461
页数：7
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