PAMPS--NiSiO(OH) Multiwalled Nanotubes As a Novel Nano-sorbent for the Effective Removal of Pb(ii) Ions

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 2

PMID 35492162

Authors

Chunmei Xiao

Jianming Lin

Affiliations

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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).

Citing Articles

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