Treatment of Dye Wastewater by Nano-ferrous Modified Bentonite Assisted Advanced Oxidation Processes

摘要

Degradation of dye wastewater was studied by using nano-ferrous modified bentonite as the heterogeneous catalyst for a Fenton-like oxidation. By comparing the effect of homogeneous Fenton reactions as well as heterogeneous Fenton-like process for nano-modified bentonite, it is found that the advanced oxidation processes assisted by nano-ferrous/bentonite complexes exhibit the stronger degradation capacity. And the removal rate of Fenton-like reaction increased from 23.6% to 75.5% when the ferrous concentration increasing from 20 to 100mmol/L. Being compared with homogeneous Fenton reactions, 20% increased degradation efficiencies is obtained by Fenton-like oxidation process for nano-modified bentonite under 6g nano-ferrous/bentonite complexes in lOOmL dye wastewater.