Activation of peroxydisulfate by thermally-treated natural siderite to degrade sulfamethazine: performance and mechanism

被引:1
|
作者
Sun, Fuwei [1 ,2 ]
Wang, Hao [1 ,2 ]
Wang, Qiang [1 ,2 ]
Chu, Ziyang [1 ,2 ]
Liu, Haibo [1 ,2 ]
Chen, Tianhu [1 ,2 ]
Chen, Dong [1 ,2 ]
Zou, Xuehua [1 ,2 ]
Shu, Daobing [1 ,2 ]
Wang, Hanlin [1 ,2 ]
机构
[1] Hefei Univ Technol, Anhui Higher Educ Inst, Key Lab Nanominerals & Pollut Control, Hefei, Peoples R China
[2] Hefei Univ Technol, Inst Environm Minerals & Mat, Sch Resources & Environm Engn, Hefei, Peoples R China
基金
中国国家自然科学基金;
关键词
siderite; magnetite; peroxydisulfate (PDS); SMT degradation; EFFICIENT DEGRADATION; HYDROGEN-PEROXIDE; NANOPARTICLES; OXIDATION; SULFATE; SURFACE; SULFAMETHOXAZOLE; TRANSFORMATION; PHOTOCATALYST; PERSULFATES;
D O I
10.1002/jctb.7375
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Compared with synthetic materials, natural mineral materials have the advantages of low cost and easy availability. In the present study, magnetite was prepared by calcination of natural siderite under an N-2 atmosphere and utilized as a heterogeneous material for sulfamethazine (SMT) degradation via peroxydisulfate (PDS) activation. Various characterizations demonstrated that the S600 (siderite calcinated at 600 degrees C for 1 h) had a high specific surface area (57.18 m(2)/g) and high electron transfer ability. Under 1 g/L S600 and 1 mM PDS, 99.9% and 50% of SMT (5 mg/L) and TOC were eliminated in 2 h, with a kinetic constant of 0.026 min(-1). Increasing the S600 dosage and PDS concentration favored SMTdegradation, while inorganic anions and natural organicmatter had the opposite effect. Besides this, Electron spin resonance (ESR) analysis and scavenger experiment results demonstrated that hydroxyl radicals (about 62.3%) and sulfate radicals (about 20.2%) played a major role, while Fe(IV) (about 16.5%) played a minor role in SMT degradation. Moreover, various intermediates for SMT degradation were put forward based on the LC-MS/MS results and their toxicity was predicted to decrease. This work provides a vision for water treatment based on natural mineral materials and presents a new idea for the comprehensive utilization of siderite. (c) 2023 Society of Chemical Industry (SCI).
引用
收藏
页码:1532 / 1541
页数:10
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