Enrichment and Recovery of Cr(VI) from Aqueous Solution via a Monolithic Loofah Sponge Modified by Tannins and Arginine

  • Wenjun LuoEmail author
  • Tiantian Luo
  • Jinlong Mu
  • Yang Cai
  • Jin Wei
  • Haifeng Li
Original Paper


In this study, a monolithic loofah sponge (LS) matrix, which was pretreated by hemicellulase and decorated by amino and guanidine, was successfully endowed with two functions: adsorption and recovery for Cr(VI). As an adsorbent, the modified LS (LS–TAA) has a high adsorption capacity (327.91 mg/g) for Cr(VI), and can be handily reused because of its integrity, good mechanical strength and convenient separation from aqueous solution. As a carrier, the residue of Cr-loaded LS–TAA was discovered to be pure Cr2O3 nanoparticles after calcination. The effect of hemicellulase pretreatment and influencing factors, adsorption kinetics, thermodynamics and isotherm adsorption models were investigated. The samples were characterized by various means including SEM, EDX, FT–IR, XRD, XPS and TEM. The results demonstrated that the LS–TAA should be viewed as a low-cost environment functional material with application potential to treat Cr-polluted wastewater.

Graphical Abstract


Loofah sponge Monolithic adsorbent Hemicellulase Cr(VI) adsorption Cr(VI) enrichment Chromium recovery 



The authors acknowledge precious support provided by the National Natural Science Fund of ‘Study on the Control of Catalytic Ozonation and Bromate Formation by Surface Performance Regulation of Fe-Co/Mn Based Catalysts (No. 2018033022)’, and the fund of ‘Study on Preparation and Performance of Biomass Macromolecular Composites (No. 2017036019)’.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of Material Science and ChemistryChina University of GeosciencesWuhanPeople’s Republic of China

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