HUBo,ZHOUAo,NIUHui-bin,et al.Preparation of Fe?enriched Biochar from Typha Orientalis Presl Root and Its Photocatalytic Degradation of Organic Pollutants[J].China Water & Wastewater,2022,38(15):55-60.
Preparation of Fe?enriched Biochar from Typha Orientalis Presl Root and Its Photocatalytic Degradation of Organic Pollutants
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第15期
Page:
55-60
Column:
Date of publication:
2022-08-01
- Keywords:
- Fe pollution; hyper-enrichment; biochar; Fenton system; photocatalytic
- Abstract:
- Hyperaccumulators are commonly used to remove harmful metals from soil, and subsequent transformation studies of these waste plants are of great significance for sustainable carbon utilization. Fe/biochar (Fe/BC) materials were made from the Fe-enriched Typha Orientalis Presl root by anaerobic pyrolysis. The morphology, content and chemical composition of Fe over Fe/BC samples were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) and atomic absorption spectrometry (AAS). The results showed that Fe was mainly embedded in the surface of biochar in the form of spherical Fe2O3, and the Fe loading was 64.76 mg/g. Further, the Fe/BC/H2O2 system could efficiently degrade the organic dye sulforhodamine B (SRB) under wide pH of 3-9 conditions, with a high degradation rate of 90% (2 h), which was a breakthrough that the traditional Fenton system must be used under strong acid conditions. The radical?trapping experiments unfolded that hydroxyl radical (·OH) was the main active species in the above system. The Fe/BC/H2O2 system still maintained a degradation rate of 81.6% for SRB after 5 cycles, and no Fe ions were dissolved during this process, indicating that Fe/BC has excellent stability as a catalyst.
Last Update:
2022-08-01