高岭土对含有Cu<sup>2+</sup>和Pb<sup>2+</sup>污水吸附性实验

李松良; 刘荣荣; 张伟东

doi:10.3969/j.issn.1000-6532.2024.01.025

高岭土对含有Cu²⁺和Pb²⁺污水吸附性实验

1.
扬州市职业大学　土木工程学院，江苏　扬州　225001

2.
扬州市职业大学　环境资源与管理学院，江苏　扬州　225001

3.
武汉理工大学　资源与环境工程学院，湖北　武汉　430070

基金项目: 江苏省第六期“333”工程第三层次资助项目；扬州科技局市校合作专项资助项目(YZ2021170)；扬州市职业大学科研创新团队建设资助项目（KYCXTD201906）；国家自然科学基金（NO. 51709254）

详细信息

作者简介: 李松良（1980-），男，硕士研究生，讲师，研究方向为污水处理及海绵城市雨水利用

中图分类号: TD985

收稿日期: 2021-05-21

刊出日期: 2024-02-25

Experimental on the Adsorption of Kaolin to Wastewater Containing Cu²⁺ and Pb²⁺

1.
School of Civil Engineering, Yangzhou Vocational University, Yangzhou 225001, Jiangsu, China

2.
School of Environmental Resources and Management, Yangzhou Vocational University, Yangzhou 225001, Jiangsu, China

3.
School of Resource & Environmental Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 21 May 2021

Publish Date: 25 February 2024

摘要

摘要:
这是一篇环境工程领域的论文。为了研究高岭土对含有Cu²⁺和Pb²⁺污水吸附性能的影响，开展了不同初始浓度、温度、吸附时间、高岭土掺量和pH值作用下高岭土吸附重金属离子实验，并分析了高岭土对Cu²⁺和Pb²⁺共同吸附实验结果。结果表明：高岭土吸附金属Pb²⁺离子的效果要好于高岭土吸附金属Cu²⁺离子的效果。结合实验结果和经济效益而言，在初始浓度为200 mg/L，pH值为6、温度为30 ℃，高岭土掺量为1.5 g，吸附时间为2.0 h时，高岭土对金属Pb²⁺和Cu²⁺离子的吸附效果较优，其中金属Pb²⁺离子的吸附量分别达到了56.38、56.22、58.76、35.75、和42.42 mg/g，金属Cu²⁺离子的吸附量45.99、47.45、47.27、25.26、22.52 mg/g。整体上，高岭土对共同吸附金属离子（Cu²⁺、Pb²⁺）的吸附量要小于单一离子的吸附量，这是由于两个金属离子在吸附过程中会相互影响对方的吸附过程。Langmuir模型对实验曲线的拟合度要远远高于Freundlich模型对实验曲线的拟合度，这就说明了Langmuir等温吸附模型更加适用于高岭土吸附金属离子吸附量的变化规律，进而证明了高岭土吸附重金属离子属于表面吸附，被吸附的重金属离子都是相互独立存在的。
- 环境工程 /
- 初始浓度 /
- 温度 /
- 吸附时间 /
- 高岭土掺量 /
- pH值 /
- 等温吸附模型
Abstract:
This is an article in the field of environmental engineering. In order to study the effect of kaolin on the adsorption performance of wastewater containing Cu²⁺ and Pb²⁺, experiments on the adsorption of heavy metal ions by kaolin under different initial concentrations, temperatures, adsorption time, kaolin content and pH values are carried out. And analyzed the results of Cu²⁺ and Pb²⁺ co-adsorption test by kaolin. The results show that the adsorption effect of kaolin on metal Pb²⁺ ions is better than the adsorption effect of kaolin on metal Cu²⁺ ions. Combining the test results and economic benefits, when the initial concentration is 200 mg/L, the pH is 6, the temperature is 30 °C, the kaolin content is 1.5 g, and the adsorption time is 2.0 h, Kaolin has the best adsorption effect on metal Pb²⁺ and Cu²⁺ ions. The adsorption capacity of metal Pb²⁺ ions reached 56.38, 56.22, 58.76, 35.75, and 42.42 mg/g, respectively. The adsorption capacity of metallic Cu²⁺ ions is 45.99, 47.45, 47.27, 25.26, 22.52 mg/g. On the whole, the adsorption capacity of kaolin for co-adsorbed metal ions (Cu²⁺, Pb²⁺) is smaller than that of a single ion. This is because two metal ions will affect each other's adsorption process during the adsorption process. The fit of Langmuir model to the test curve is much higher than the fit of Freundlich model to the test curve. This shows that the Langmuir isotherm adsorption model is more suitable for the change law of the amount of metal ions adsorbed by kaolin. Furthermore, it is proved that the adsorption of heavy metal ions by kaolin belongs to surface adsorption, and the adsorbed heavy metal ions exist independently of each other.
- Environmental engineering /
- Initial concentration /
- Temperature /
- Adsorption time /
- Kaolin content /
- pH value /
- Adsorption isotherm model

HTML全文

图 1 不同初始浓度作用下高岭土吸附金属离子吸附量

Figure 1.

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图 2 不同pH值作用下高岭土吸附金属离子吸附量

Figure 2.

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图 3 不同温度作用下高岭土吸附金属离子吸附量

Figure 3.

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图 4 高岭土掺量对高岭土吸附金属离子吸附量的影响

Figure 4.

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图 5 吸附时间对高岭土吸附金属离子吸附量的影响

Figure 5.

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图 6 高岭土对Cu²⁺和Pb²⁺共同吸附试的变化规律

Figure 6.

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图 7 高岭土的吸附-解吸等温线

Figure 7.

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图 8 P/[V_ads(P₀P−1)]与P/P₀之间的关系

Figure 8.

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图 9 模型曲线与实验曲线的对比

Figure 9.

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表 1 Langmuir和Freundlich模型参数

Table 1. Langmuir and Freundlich model parameters

金属离子 Freundlich模型 Langmuir模型

Cu²⁺ K_F n R² K Q_max R²
1.006 0.710 0.925 0.002 134.941 0.954
Pb²⁺ K_F n R² K Q_max R²
3.194 0.528 0.913 0.006 102.461 0.960

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金属离子	Freundlich模型			Langmuir模型
Cu²⁺	K_F	n	R²	K	Q_max	R²
Cu²⁺	1.006	0.710	0.925	0.002	134.941	0.954
Pb²⁺	K_F	n	R²	K	Q_max	R²
Pb²⁺	3.194	0.528	0.913	0.006	102.461	0.960

高岭土对含有Cu2+和Pb2+污水吸附性实验

1. 扬州市职业大学 土木工程学院，江苏 扬州 225001 2. 扬州市职业大学 环境资源与管理学院，江苏 扬州 225001 3. 武汉理工大学 资源与环境工程学院，湖北 武汉 430070

作者简介: 李松良（1980-），男，硕士研究生，讲师，研究方向为污水处理及海绵城市雨水利用

Experimental on the Adsorption of Kaolin to Wastewater Containing Cu2+ and Pb2+

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高岭土对含有Cu²⁺和Pb²⁺污水吸附性实验

1.
扬州市职业大学　土木工程学院，江苏　扬州　225001

2.
扬州市职业大学　环境资源与管理学院，江苏　扬州　225001

3.
武汉理工大学　资源与环境工程学院，湖北　武汉　430070

Experimental on the Adsorption of Kaolin to Wastewater Containing Cu²⁺ and Pb²⁺