Abstract
The galacylhydrazine modified guar gum (GG-GH) was prepared through oxidation and condensation. GG-GH demonstrated highly efficient removing performance for organic dyes in large volume of water sample solutions, a rapid uptake of dyes was observed and the equilibrium is achieved in 0.5 h. The maximum adsorption capacity for MB, RhB, MeO and BrB were 1522.2 mg g−1, 1359.96 mg g−1, 868.83 mg g−1and 904.7 mg g−1 at room temperature according to the Langmuir adsorption isotherm(R2 > 0.977). The removal percentage still remains high(>95%) after ten filtration-regeneration cycles, suggesting GG-GH is an excellent gum-based materials for the water treatment with high recyclability and long life.
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