Functional wastepaper-montmorillonite composite aerogel for Cd 2+ adsorption
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RESEARCH ARTICLE
Functional wastepaper-montmorillonite composite aerogel for Cd2+ adsorption Yaoning Chen 1,2 & Yihuan Liu 1,2 & Yuanping Li 3 & Li Zhao 1,2 & Yanrong Chen 1,2 & Hui Li 4 & Yuqing Liu 1,2 & Linshenzhang Li 1,2 & Fangting Xu 1,2 & Meiling Li 1,2 Received: 18 April 2020 / Accepted: 26 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this study, a composite aerogel (WP-MMT) composed of wastepaper (WP) and montmorillonite (MMT) was prepared by ambient pressure drying technology to adsorb Cd2+. The study of compression performance indicated that the composite aerogel had ideal mechanical strength when the mass ratio of WP to MMT was 1:1. The specific surface areas of the aerogels modified by hydrogen peroxide (WP-MMT-H2O2) and sodium hydroxide (WP-MMT-NaOH) were increased greatly. The sorption isotherms and kinetics of Cd2+ sorption on WP-MMT-H2O2 and WP-MMT-NaOH were investigated. The Cd2+ sorption data could be well described by a simple Langmuir model, and the pseudo-second-order kinetic model best fitted the kinetic data. The maximum sorption capacity obtained from the Langmuir model was 232.50 mg/g for WP-MMT-NaOH. The adsorption mechanism of WPMMT was chemical adsorption of a single-molecule layer. In general, it was proved that the composite aerogel with high adsorption capacity of Cd2+ could be synthesized from modified WP and MMT by ambient pressure drying. The composite aerogel fabricated by wastepaper and montmorillonite showed bright application prospect in the aqueous heavy metal pollution control. Keywords Aerogel . Montmorillonite . Wastepaper . Cd2+ . Adsorption
Yaoning Chen, Yihuan Liu and Yuanping Li contributed equally to this work. Responsible Editor: Tito Roberto Cadaval Jr Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-09907-6) contains supplementary material, which is available to authorized users. * Yaoning Chen [email protected] * Yuanping Li [email protected] 1
College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
2
Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, China
3
College of Municipal and Mapping Engineering, Hunan City University, Yiyang 413000, Hunan, China
4
State Key Laboratory of Utilization of Woody Oil Resource and Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, China
Introduction In recent years, the water quality was continually deteriorated due to the increasing industrial activities (Lim and Aris 2013; Zhi et al. 2016). Various heavy metal contaminants are produced by industries which seriously threat human health (Chen et al. 2019a). Cadmium, one of the most toxic heavy metals, could lead to bone and kidney damage after prolonged exposure (Wang et al. 2018). The treatment of cadmium is crucial for environment protection and public health. Several physicochemical and biological methods have been develope
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