Cellulose fibers from coconut husk (CH) were modified with tannin and applied as a biosorbent for the removal of heavy metal ions including Cu(II), Cd(II), and Pb(II) in wastewater. To improve the ion adsorption efficiency of the cellulose fiber from CH, epichlorohydrin was used as a crosslinking agent to graft tannin molecules onto cellulose to produce tannin-immobilized cellulose fiber (TCF). Under an optimum condition at pH 5.0 and 30 min of contact time, the adsorption capacity was 38.02 mg/g, 59.52 mg/g, and 72.99 mg/g for Pb(II), Cd(II), and Cu(II) ions, respectively. Adsorption behaviors of the metal ions could be described using the Langmuir isotherm model. The desorbing solution containing 0.1 M EDTA was chosen to regenerate used TCF. Moreover, chemical characterizations of the TCF using Fourier transform infrared spectrometry showed that TCF possessed combined properties of both CH and tannin. The developed TCF is an inexpensive and efficient alternative that could be further developed as a platform for wastewater management.

Development of tannin-immobilized cellulose fiber extracted from coconut husk and the application as a biosorbent to remove heavy metal ions

The synthesis of tannin-based graphene aerogel by hydrothermal treatment for removal of heavy metal ions

Polyethylenimine‐modified sugarcane bagasse cellulose as an effective adsorbent for removing Cu(II) from aqueous solution

In this work, the adsorbent based on tannin (TN) and polyethylenimine (PEI) was prepared via a simple and green method (TNP). The characteristics of the TNP were determined using scanning electron ...

Green Synthesis of Tannin-Polyethylenimine Adsorbent for Removal of Cu(II) from Aqueous Solution

Tannin was crosslinked with paraformaldehyde to prepare tannin-phenolic polymer(TP), TP immobilized on cellulose (TPPC) was prepared by the cross-linking reaction of TP and cellulose with epichloro...

Hua Yuan

Papers

Removal of Cd(II) and Cu(II) ions from aqueous solutions using tannin-phenolic polymer immobilized on cellulose