Effect of Hydroxyapatite on Adsorption of Zn<sup>2+</sup> and Cd<sup>2+</sup>in Lead-Zinc Mine Area Soils

doi:10.13870/j.cnki.stbcxb.2019.04.049

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Effect of Hydroxyapatite on Adsorption of Zn²⁺ and Cd²⁺in Lead-Zinc Mine Area Soils

更新时间：2025-03-12

- Effect of Hydroxyapatite on Adsorption of Zn²⁺ and Cd²⁺in Lead-Zinc Mine Area Soils
- Vol. 33, Issue 4, Pages: 349-356(2019)
- 作者机构：
  
  1. 四川农业大学资源学院,成都,611130
  2. 温江区和盛镇党建办,成都,611130
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2019.04.049
  CLC：
- Published：2019
- 稿件说明：
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Effect of Hydroxyapatite on Adsorption of Zn²⁺ and Cd²⁺in Lead-Zinc Mine Area Soils[J]. 2019, 33(4): 349-356.
DOI：

Effect of Hydroxyapatite on Adsorption of Zn²⁺ and Cd²⁺in Lead-Zinc Mine Area Soils[J]. 2019, 33(4): 349-356. DOI： 10.13870/j.cnki.stbcxb.2019.04.049.

摘要

为探究羟基磷灰石（HAP）对矿区土壤重金属的固化效果，采用吸附试验，研究施加HAP的铅锌矿区土壤对Cd

、Zn

的动力学吸附和等温吸附效果。结果表明：土壤对Cd

、Zn

的吸附量随Cd

、Zn

初始浓度的增加而增加；在酸性条件下，其吸附量随pH上升而上升；准二级动力学方程能很好地描述两者的吸附过程，土壤吸附能力随HAP的添加量增大而增强；在Zn—Cd共存体系中，当初始浓度为

20 mg/L时，土壤对Zn

、Cd

的吸附无明显差异，2种金属离子竞争力度小，随着初始浓度上升，竞争明显，对Zn

的最大吸附量能达到单一体系中的79%~87%，而Cd

的最大吸附量只有单一体系中的57%~72%，Zn

的竞争力优于Cd

，Zn

对Cd

吸附产生严重的抑制。综上可知，HAP能提高矿区土壤的吸附性能，在Zn、Cd污染土壤中，更能提升土壤对Zn

的吸附固持能力。

Abstract

To explore the effect of hydroxyapatite (HAP) on the solidification of heavy metals in mining areas

this study conducted the adsorption experiments to study the kinetic adsorption and isothermal adsorption of Cd

and Zn

in the soil of Pb-Zn mines with HAP. The results showed that the adsorption of Cd

and Zn

increased with the increase of initial concentrations of Cd

and Zn

; under acidic conditions

the amount of adsorption increased with the increasing pH values; the quasi-second-order kinetic equation could well describe the adsorption pro

cess of Zn

and Cd

soil adsorption capacities increased with the addition of HAP. In the Zn-Cd coexistence system

when the initial concentration was

20 mg/L

the adsorption of Zn

and Cd

in the soil was not significantly different. The competitiveness of the two metal ions was small

and the competition was obvious as the initial concentrations increased. The maximum adsorption capacities of Zn

reached 79%~87% in a single system

while the maximum adsorption capacities of Cd

was only 57%~72% in a single system. The competitiveness of Zn

was better than that of Cd

and Zn

seriously inhibited the adsorption of Cd

. In summary

HAP could improve the adsorption performance of soil in the mining area

and enhance the adsorption and retention ability of soil to Zn

in Zn and Cd contaminated soils.

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Effect of Hydroxyapatite on Adsorption of Zn2+ and Cd2+in Lead-Zinc Mine Area Soils

DOI：10.13870/j.cnki.stbcxb.2019.04.049

摘要

Abstract

关键词

Keywords

references

Effect of Hydroxyapatite on Adsorption of Zn²⁺ and Cd²⁺in Lead-Zinc Mine Area Soils