氨基和巯基功能化合成的X分子筛高效去除Pb（Ⅱ）

doi:10.11894/iwt.2020-0558

工业水处理 ›› 2021, Vol. 41 ›› Issue (3): 83-87, 92. doi: 10.11894/iwt.2020-0558

氨基和巯基功能化合成的X分子筛高效去除Pb（Ⅱ）

许建捷¹(),田琦^1,^2,*(),葛启隆¹,MoeenMuhammad¹,丰开庆¹

1. 太原理工大学环境科学与工程学院, 山西晋中 030600
2. 太原理工大学土木工程学院, 山西太原 030000

收稿日期:2021-01-01 出版日期:2021-03-20 发布日期:2021-03-26
通讯作者: 田琦 E-mail:1162696504@qq.com;tqtyut@163.com
作者简介:许建捷(1993-), 硕士。电话: 18834199700, E-mail: 1162696504@qq.com
基金资助:
山西省基础研究项目(201801D121267)

Highly efficient removal of Pb(Ⅱ) by amine-functionalized and thiol-functionalized synthetic X molecular sieve

Jianjie Xu¹(),Qi Tian^1,^2,*(),Qilong Ge¹,Muhammad Moeen¹,Kaiqing Feng¹

1. College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, China
2. College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030000, China

Received:2021-01-01 Online:2021-03-20 Published:2021-03-26
Contact: Qi Tian E-mail:1162696504@qq.com;tqtyut@163.com

摘要/Abstract

摘要：

为了提高X分子筛（XM）的耐酸性和对Pb²⁺的吸附能力，采用有机改性剂对合成的XM进行了氨基功能化（NH₂-XM）和巯基功能化（SH-XM）改性。确定了最佳接枝条件，并对三种材料进行了表征和吸附研究。结果表明，三种材料的吸附过程属于单层化学吸附。与XM（34 mg/g）相比，NH₂-XM（154 mg/g）和SH-XM（111 mg/g）在低pH条件下具有更好的吸附效果和更强的耐酸能力。因此，NH₂-XM可作为高效吸附剂去除水溶液中的Pb²⁺。

关键词: 吸附剂, X分子筛, 除铅

Abstract:

In order to improve the acid resistance of X molecular sieve (XM) and its adsorption capacity for Pb²⁺, amino-functionalization (NH₂-XM) and thiol-functionalization (SH-XM) were carried out on the synthesized XM with organic modifier. The optimal grafting conditions were determined and characterization and adsorption study of the three materials were conducted. The results indicated that adsorption process of the three materials belongs to monolayer chemisorption. Compared with XM(34 mg/g), NH₂-XM(154 mg/g) and SH-XM(111 mg/g) had better adsorption effect and stronger acid resistance at low pH. Therefore, NH₂-XM can be used as highly efficient adsorbent to remove Pb²⁺ in aqueous solutions.

Key words: absorbent, X molecular sieve, lead removal

中图分类号:

许建捷,田琦,葛启隆,MoeenMuhammad,丰开庆. 氨基和巯基功能化合成的X分子筛高效去除Pb（Ⅱ）[J]. 工业水处理, 2021, 41(3): 83-87, 92.

Jianjie Xu,Qi Tian,Qilong Ge,Muhammad Moeen,Kaiqing Feng. Highly efficient removal of Pb(Ⅱ) by amine-functionalized and thiol-functionalized synthetic X molecular sieve[J]. Industrial Water Treatment, 2021, 41(3): 83-87, 92.

https://www.iwt.cn/CN/Y2021/V41/I3/83

图/表 7

参考文献 18

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改性剂量/mL	0.5	0.8	1.0	1.5	2.0
NH₂-XM中N质量分数/%	1.134	1.624	2.009	2.234	2.325
SH-XM的S质量分数/%	0.803	1.342	1.687	2.082	2.149
NH₂-XM吸附量/（mg·g^-1）	490.7	500.3	518.3	481.9	472.2
SH-XM吸附量/（mg·g^-1）	456.0	477.2	476.3	430.7	428.7

改性剂量/mL	0.5	0.8	1.0	1.5	2.0
NH₂-XM中N质量分数/%	1.134	1.624	2.009	2.234	2.325
SH-XM的S质量分数/%	0.803	1.342	1.687	2.082	2.149
NH₂-XM吸附量/（mg·g^-1）	490.7	500.3	518.3	481.9	472.2
SH-XM吸附量/（mg·g^-1）	456.0	477.2	476.3	430.7	428.7

等温模型	参数	XM	NH2-XM	SH-XM
Langmuir	K_L/（L·g^-1）	0.071	0.077	0.065
	Q_m/（mg·g^-1）	538.946	668.905	605.390
	R²	0.998	0.995	0.999
Freundlich	K_F/（L·mg^-1）	187.296	400.033	366.745
	1/n	0.157	0.074	0.071
	R²	0.843	0.925	0.904

等温模型	参数	XM	NH2-XM	SH-XM
Langmuir	K_L/（L·g^-1）	0.071	0.077	0.065
	Q_m/（mg·g^-1）	538.946	668.905	605.390
	R²	0.998	0.995	0.999
Freundlich	K_F/（L·mg^-1）	187.296	400.033	366.745
	1/n	0.157	0.074	0.071
	R²	0.843	0.925	0.904

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