Elimination of As(Ⅲ) from Groundwater by Bead Cellulose Adsorbent Loaded with Fe(β-FeOOH)

Abstract

Abstract: A new adsorbent, bead cellulose loaded with Fe hydroxide(β-FeOOH) was prepared and applied to the removal of arsenite from groundwater. The adsorbent has perfect properties in As(Ⅴ) and As(Ⅲ) adsorption capacity, selectivity and kinetics. There is no need of pH adjusting and preoxidation during the arsenite removal. The adsorbent is porous and has excellent mechanical properties. The adsorbent has a high content of Fe, which is the reactive center with a high reactivity for sorption of arsenite. The sorption kinetic data can be described by the Lagergren pseudo-second order rate equation. Arsenate elimination was favored at pH=6-9. The addition of chloride, sulfate did not affected the arsenite removal efficiency. The column experiment indicated that the breakthrough and saturation capacity were large with high velocity flow and influent arsenite concentration. The adsorbent can be generated with NaOH solutions, and the desorption and regeneration process were effective. The β-FeOOH loaded in the bead cellulose was chemically stable during the column experiment and regeneration.

Key words: Bead cellulose loaded with Fe hydroxide, Adsorbent, Arsenite, Adsorption, Removal

CLC Number:

X523

TrendMD:

GUO Xue-Jun, CHEN Fu-Hua . Elimination of As(Ⅲ) from Groundwater by Bead Cellulose Adsorbent Loaded with Fe(β-FeOOH)[J]. Chem. J. Chinese Universities, 2005, 26(7): 1258.

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