Simulation of lead ions adsorption onto the iron-coated medium: Dependent on temperature and pH

被引：4

作者：

Dept. of Environmental Engineering and Science, Fooyin Univ., Kaohsiung 831, Taiwan ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

不详 ^{[4
]}

机构：

[1] Dept. of Environmental Engineering and Science, Fooyin Univ.

[2] Dept. of Civil Engineering, National Kaohsiung Univ. of Applied Science

[3] Dept. of Healthcare Administration, Fooyin Univ.

[4] Dept. of Agricultural Chemistry, National Taiwan Univ.

来源：

Pract. Period. Hazard. Toxic Radioact. Waste Manage. | 2006年 / 1卷 / 28-32期

关键词：

Adsorption; Coating; Iron; Lead; Simulation; Temperature;

D O I：

10.1061/(ASCE)1090-025X(2006)10:1(28)

中图分类号：

学科分类号：

摘要：

Heat was employed to coat crystalline goethite onto a quartz sand surface so that the adsorbent properties of the coating could be utilized. Adsorption experiments were conducted to further demonstrate the adsorption of lead ions by goethite-coated medium under various temperatures and pH, respectively. The adsorption reaction between iron-coated medium and lead ions was simulated by a cation exchange model. Results indicated that the solution temperature and pH had a noticeable effect on the final adsorption capacity for lead ions. The pH-adsorption edges were shifted to lower pH values with increasing temperature. The adsorption reaction between lead ions and goethite-coated medium was an endothermic process. A cation exchange model applied to the regression model of experimental data was fitted very well. A high correlation coefficient (r2=0.91) and an extreme low p-value (7.02 × 10-82) indicated that the variance of dependent variable, adsorption capacity of iron-coated medium could be firmly explained by independent variables such as [Pb+n], temperature and [H+]. © 2006 ASCE.

引用

页码：28 / 32

页数：4

共 22 条

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