An upcycled wood sponge adsorbent for drinking water purification by solar steam generation

Meng Li, Mengwen Xu, Quanyu Shi, Haotian Wang, Hongmin Guo, Lidong Wang, Tony D. James

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The shortage of freshwater resources caused by heavy metal pollution is an acute global issue. Herein, a novel nanoplatform was fabricated by hydrothermal deposition of 3D-MoS2 nanospheres onto biocompatible wood sponge (WS) for Hg(ii) removal. Moreover, a secondary water purification strategy was investigated to produce drinkable water using the exhausted wood sponge. The exhausted MoS2-wood sponge (MWS) was used to construct a solar steam generator by wrapping with a hydrophilic polyvinyl alcohol (PVA) layer to prevent heavy metal ion leakage and to enhance the hydrophilicity. The energy conversion efficiency of the evaporator was calculated to be 95.48% under one sun illumination. Remarkably, the treatment of model desulphurization wastewater from power plants with this functional wood sponge could efficiently reduce the mercury concentration below the limit proposed by the World Health Organization for drinking water. These results provide a basis for the application of upcycled hazardous adsorbents for the purification of drinkable water.

Original languageEnglish
Pages (from-to)2559-2571
Number of pages13
JournalEnvironmental Science: Nano
Issue number7
Early online date2 Jun 2022
Publication statusPublished - 1 Jul 2022

Bibliographical note

Funding Information:
This research is supported by the National Key Research and Development Program of China (No. 2017YFC0210201), the Natural Science Foundation of Hebei Province (No. E2016502096), the National Natural Science Foundation of China (No. 21607044, 51878273), and the Fundamental Research Funds for the Central Universities (No. 2021MS102). T. D. J. wishes to thank the Royal Society for a Wolfson Research Merit Award and the Open Research Fund of the School of Chemistry and Chemical Engineering, Henan Normal University for support (2020ZD01).

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • General Environmental Science


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