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PAMPS - 硅酸镍氢氧化物多壁纳米管作为一种新型纳米吸附剂用于有效去除Pb（II）离子。

PAMPS--NiSiO(OH) multiwalled nanotubes as a novel nano-sorbent for the effective removal of Pb(ii) ions.

作者信息

Xiao Chunmei, Lin Jianming

机构信息

College of Materials Science & Engineering, Huaqiao University 361021 China

College of Chemical Engineering and Materials, Quanzhou Normal University Quanzhou 362002 China.

出版信息

RSC Adv. 2020 Feb 19;10(13):7619-7627. doi: 10.1039/c9ra10971d. eCollection 2020 Feb 18.

DOI:10.1039/c9ra10971d
PMID:35492162
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9049933/
Abstract

The existence of Pb(ii) ions in water systems poses significant potential hazards to public health and the environment. In the present study, poly(2-acrylamido-2-methylpropanesulfonic acid) (PAMPS) brush-modified NiSiO(OH) nanotubes were prepared, and their adsorption efficiency against the Pb(ii) ions was investigated. The characterization results of FTIR spectroscopy, TGA, TEM, and XPS indicated the successful grafting of PAMPS on the surface of free NiSiO(OH) NTs, and the prepared PAMPS--NiSiO(OH) NTs exhibited a 6-8 nm grafting layer, which could provide abundant binding sites for metal adsorption. During the Pb(ii) removal process, a pH-dependent adsorption behavior was observed, and the adsorption processes fitted well with the pseudo-second-order kinetic model and the Langmuir isotherm model. Compared with unmodified NiSiO(OH), the PAMPS--NiSiO(OH) NTs exhibited obviously faster adsorption of Pb(ii) and higher equilibrium adsorption capacity for the removal of Pb(ii). The maximum adsorption capacity calculated the Langmuir isotherm model was 0.653 mmol g (135.3 mg g) at 298 K. In a metal coexisting system, the total adsorption capacity of the NTs was increased; this indicated the potential of the proposed NTs in the removal of Pb(ii) from metal coexisting wastewater. This study showed the significant potential of PAMPS--NiSiO(OH) NTs in the effective removal of Pb(ii).

摘要

水系统中铅（II）离子的存在对公众健康和环境构成了重大潜在危害。在本研究中，制备了聚（2-丙烯酰胺-2-甲基丙烷磺酸）（PAMPS）刷修饰的NiSiO(OH)纳米管，并研究了它们对铅（II）离子的吸附效率。傅里叶变换红外光谱（FTIR）、热重分析（TGA）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）的表征结果表明，PAMPS成功接枝到游离NiSiO(OH)纳米管表面，制备的PAMPS-NiSiO(OH)纳米管呈现出6-8nm的接枝层，可为金属吸附提供丰富的结合位点。在铅（II）去除过程中，观察到了pH依赖性吸附行为，吸附过程与伪二级动力学模型和朗缪尔等温线模型拟合良好。与未修饰的NiSiO(OH)相比，PAMPS-NiSiO(OH)纳米管对铅（II）的吸附明显更快，对铅（II）的去除具有更高的平衡吸附容量。根据朗缪尔等温线模型计算，在298K时最大吸附容量为0.653mmol/g（135.3mg/g）。在金属共存体系中，纳米管的总吸附容量增加；这表明所提出的纳米管在从金属共存废水中去除铅（II）方面具有潜力。本研究表明PAMPS-NiSiO(OH)纳米管在有效去除铅（II）方面具有巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/1a195c2f614c/c9ra10971d-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/84de4d6d44a2/c9ra10971d-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/b775ca3956b8/c9ra10971d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/b0c21954a29b/c9ra10971d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/0cf996f100d3/c9ra10971d-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/1a195c2f614c/c9ra10971d-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/84de4d6d44a2/c9ra10971d-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/4b7cbf200e46/c9ra10971d-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/3ca8aa90deb7/c9ra10971d-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/1113853f8729/c9ra10971d-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/b775ca3956b8/c9ra10971d-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/b0c21954a29b/c9ra10971d-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/0cf996f100d3/c9ra10971d-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3cb/9049933/1a195c2f614c/c9ra10971d-f8.jpg

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