Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6968467 | Journal of Hazardous Materials | 2018 | 22 Pages |
Abstract
The heterogeneous Fenton system has become the hotspot in the decontamination field due to its effective degradation performance with a wide pH range. Based on the unstable chemical properties of pyrite, in this article, Fe2GeS4 nanoparticles with better thermodynamic stability were prepared by vacuum sintering and high energy ball milling and its potential as Fenton reagent was investigated for the first time. Three determinants of the heterogeneous Fenton system including the iron source, hydrogen peroxide, pH and the degradation mechanism were investigated. The catalyst dosage of 0.3â¯g/L, initial H2O2 concentration in the Fenton system of 50â¯mâ¯mol/L and pH of 7 were chosen as the best operational conditions. An almost complete degradation was achieved within 5â¯min for methylene blue and rhodamine b while 10â¯min for methyl orange. The total organic carbon removal efficiencies of Fe2GeS4 heterogeneous Fenton system for methylene blue, methyl orange and rhodamine b in 10â¯min were 56.3%, 66.2% and 74.2%, respectively. It's found that the degradation ability could be attributed to a heterogeneous catalysis occurring at the Fe2GeS4 surface together with a homogeneous catalysis in the aqueous phase by the dissolved iron ions.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Xiaoguo Shi, Ang Tian, Junhua You, He Yang, Yuzheng Wang, Xiangxin Xue,