Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Jun;26(16):16000-16013. doi: 10.1007/s11356-019-04346-4. Epub 2019 Apr 8.
Iron-incorporated silica (Fe/SiO) with different Fe/Si molar ratio was successfully prepared from rice husk pyrolytic residues (RHR) through alkali pretreatment, co-precipitation, and calcination. Various characterization methods indicated that the Fe/SiO samples possessed mesoporous structure with Fe species incorporated into the framework of silica. The obtained materials were applied in the treatment of hazardous banknote printing wastewater, and under the optimal conditions, colored pollutants, humic acid-like and soluble microbial by-product-like organics were removed significantly. It was found that Fe/SiO acted as both flocculant and catalyst, and the framework iron species catalyzed the oxidative degradation of refractory organics in the presence of HO. A heterogeneous Fenton-like system was formed in the wastewater treatment process.
铁硅共掺杂二氧化硅（Fe/SiO）是通过稻壳热解残渣（RHR）的碱预处理、共沉淀和煅烧成功制备的，具有不同的铁硅摩尔比。各种表征方法表明，Fe/SiO 样品具有介孔结构，铁物种掺入到二氧化硅的骨架中。所得材料应用于处理危险的钞票印刷废水，在最佳条件下，显著去除了有色污染物、腐殖酸样和可溶性微生物副产物样有机物。研究发现，Fe/SiO 既作为絮凝剂又作为催化剂，在 HO 的存在下，骨架铁物种催化难降解有机物的氧化降解。在废水处理过程中形成了非均相类 Fenton 体系。
