Hydrothermal synthesizing sludge-based magnetite catalyst from ferric sludge and biosolids: Formation mechanism and catalytic performance
Hydrothermal synthesizing sludge-based magnetite catalyst from ferric sludge and biosolids: Formation mechanism and catalytic performance
复制标题
三价铁污泥和生物固体水热合成污泥基磁铁矿催化剂：形成机理和催化性能
DOI：
10.1016/j.scitotenv.2019.133986
复制
发表时间：
2019
影响因子：
9.8
通讯作者：
Xiang Li
中科院分区：
文献类型：
--
作者：
He Zhang;Gang Xue;Hong Chen;Xiang Li
Sludge-based magnetite catalyst (SBMC) containing Fe3O4was synthesized by hydrothermal (HT) of biosolids and ferric sludge, which is a promising wasted sludge recycling way. The protein and carbohydrate, main representative compounds in biosolids, were used to explore the SBMC formation mechanism. A part of carbohydrate and the produced Maillard reaction products (MRPs) derived from two substrates via Maillard reaction (MR) were confirmed to participate in Fe3+reduction. The MR accompanied by substrates humification, making MRPs own strong chelation activity. The MRPs (50–100 kDa) reflected the strongest relative reducing and chelation activity, mainly involving in Fe3O4synthesis. Furthermore, the SBMC was verified as an efficient Fenton-like catalyst for aniline with 77.9% removal efficiency. The radical dotOH and radical dotO2–both contributed to the degradation, differing from only radical dotOH playing function in traditional Fenton-like system, implying biochar in SBMC could mediate the reactive oxygen species generating by Fe3O4, and benefit its catalytic performance.
