Abstract
Because oxometallic ions (Mo(VI), W(VI), V(V), B(III), Cr(VI), Ge(IV)) are toxic for animals and plants, it is important to economically remove them from industrial wastewater.
In this paper, we examined whether the raw wood materials can adsorb oxometallic ions. It was found that wood particles such as cedar or bamboo can adsorb oxometallic ions. The optimum pHs of adsorption depended on the metal and wood particles used. The adsorption isotherm of metals correlated well with the Langmuir equation. The saturation adsorption capacities of metal ions on cedar were larger than those on bamboo.
In order to improve the adsorption ability, the wood particles were pre-treated with NaOH. Treatment with NaOH was effective for cedar.
Adsorption kinetics of metal ions on wood particles correlated well with a pseudo-second-order reaction model.
The unmodified raw wood material, especially cedar, was found to be promising adsorbent for the recovery of oxometallic ions.
