Al-Li Alloy Chemical Milling Waste Solution Synthesis of γ-AlOOH Bundles for Cr(VI) Rapid Adsorption

摘要

Al-Li alloy chemical milling waste solution (AlCM) was utilized for the first time to prepare γ-AlOOH(boehmite) as highly efficient adsorbent for Cr(VI). The NaAlO2 in AlCM reacted with H2O2 at room temperature for 0.25 h to prepare porous γ-AlOOH bundles with the specific surface area of 232.2 m2g-1. The possible growth mechanism of γ-AlOOH under CTAB and time was proposed. The kinetics and adsorption properties of Cr(VI) adsorbed by γ-AlOOH were also investigated. The porous γ-AlOOH bundles can quickly adsorb Cr(VI) within 20 minutes and show stable recyclability. This study shows that it is a cost-effective way to treat and recycle AlCM that the γ-AlOOH is synthesized from AlCM as an adsorbent to remove Cr (VI) heavy metals in wastewater.