Institute of Soil and Solid Waste Pollution Control, School of Environmental Engineering, Nanjing Institute of Technology, No. 1 Hongjing Avenue Jiangning Science Park, Nanjing, Jiangsu, People's Republic of China, CN211167.
School of Environmental Science & Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wu Han, CN430074, China.
Environ Sci Pollut Res Int. 2021 Jun;28(24):31618-31629. doi: 10.1007/s11356-021-12694-3. Epub 2021 Feb 20.
The sludge-based activated carbons (SACs) were prepared by sewage sludge and corn straw and modified by ferric nitrate. The HS removal performance and the desulfurization mechanism of the modified SAC were studied. Results showed that breakthrough sulfur capacity and saturation sulfur capacity of the SAC prepared by recommended modification were 27.209 mg/g and 48.098 mg/g, which were as 4.68 times and 7.02 times larger as those before modification, respectively. Additionally, results showed that the desulfurization products of unmodified SAC were mainly sulfur, while that of modified SAC were mainly sulfate. These results indicated that ferric nitrate modification changed the way of hydrogen sulfide removal by SAC: the desulfurization process of unmodified SAC can be expressed as S → S → S → S, and the oxidative active component was dominated by O*, while that of modified SAC can be expressed as S → S → S, and the oxidative active components are both Fe and O*.
以污水污泥和玉米秸秆为原料，硝酸铁为改性剂制备了污泥基活性炭（SAC）。研究了改性 SAC 的 HS 去除性能和脱硫机理。结果表明，推荐改性制备的 SAC 的穿透硫容量和饱和硫容量分别为 27.209mg/g 和 48.098mg/g，分别是改性前的 4.68 倍和 7.02 倍。此外，结果表明，未改性 SAC 的脱硫产物主要为硫，而改性 SAC 的脱硫产物主要为硫酸盐。这些结果表明，硝酸铁改性改变了 SAC 去除硫化氢的方式：未改性 SAC 的脱硫过程可以表示为 S → S → S → S，氧化活性成分主要由 O* 主导，而改性 SAC 的脱硫过程可以表示为 S → S → S，氧化活性成分均为 Fe 和 O*。
