Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 27, Issue 31, Pages 38644-38653Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-020-09907-6
Keywords
Aerogel; Montmorillonite; Wastepaper; Cd2+; Adsorption
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Funding
- National Natural Science Foundation of China [51979104]
- Research Foundation of Education Department of Hunan Province [17K019]
- Natural Science Foundation of Hunan Province of China [2020JJ5019]
- Science and Technology Planning Project of Changsha [kq1802010]
- Forestry Science and Technology Planning Project of Hunan Province [XLK201938]
- Science and Technology Planning Project of Hunan Province [2018RS3109]
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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 Cd(2+)sorption on WP-MMT-H(2)O(2)and WP-MMT-NaOH were investigated. The Cd(2+)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 WP-MMT was chemical adsorption of a single-molecule layer. In general, it was proved that the composite aerogel with high adsorption capacity of Cd(2+)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.
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