A low-cost iron mining residue catalyst employed in antibiotic degradation: Parameter optimization, influence of photogenerated species and the identification of main transformation products

被引：0

作者：

da Silva, Michelle Reis ^{[1
]}

Cunha, Deivisson Lopes ^{[2
]}

Kuznetsov, Alexei ^{[3
]}

Araujo, Joyce R. ^{[3
]}

Della-Flora, Alexandre ^{[4
]}

Dallegrave, Alexsandro ^{[4
]}

Sirtori, Carla ^{[4
,5
]}

Saggioro, Enrico Mendes ^{[1
,6
]}

机构：

[1] Fundacao Oswaldo Cruz, Oswaldo Cruz Inst, Environm Hlth Evaluat & Promot Lab, 4365 Brazil Ave, BR-21045900 Rio De Janeiro, RJ, Brazil

[2] Rio de Janeiro State Univ UERJ, Dept Sanitary & Environm Engn, R Sao Francisco Xavier 524, BR-20550900 Rio De Janeiro, RJ, Brazil

[3] Natl Inst Metrol Qual & Technol INMETRO, Mat Metrol Div, BR-25250020 Duque De Caxias, RJ, Brazil

[4] Univ Fed Rio Grande do Sul, Inst Quim, Av Bento Goncalves 9500, BR-91501970 Porto Alegre, RS, Brazil

[5] Univ Fed Santa Maria UFSM, Chem Dept, Lab Pesticide Residues Anal LARP, Santa Maria, RS, Brazil

[6] Oswaldo Cruz Fundacao, Sergio Arouca Natl Sch Publ Hlth, Postgrad Program Publ Hlth & Environm, 1480 Leopoldo Bulhoes Ave, BR-21041210 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 01期

关键词：

ciprofloxacin; sulfamethoxazole; tetracycline; heterogeneous photo-fenton; by-products; FENTON PROCESS; PHOTO-FENTON; WASTE-WATER; PHOTOCATALYTIC ACTIVITY; RESISTANT BACTERIA; AQUEOUS-SOLUTION; OXIDATION; CIPROFLOXACIN; REMOVAL; KINETICS;

D O I：

10.1016/j.jece.2023.111844

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The ubiquitous presence of antibiotics in aquatic ecosystems due to their frequent and indiscriminate use has become a major global health concern, leading to high environmental bacteria and resistance gene development. In this context, this study aimed to evaluate the degradation of three antibiotics, ciprofloxacin (CIP), sulfamethoxazole (SMX) and tetracycline (TET), employing a mining residue as the photocatalyst. The mining residue was characterized by the Brunauer-Emmett-Teller (BET), X ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X ray diffraction (XRD) techniques, and exhibited high iron content (similar to 70%) predominantly Fe+2. A rotatable central composite design (RCCD) employing catalyst concentrations, H2O2 and pH as variables was applied, resulting in optimal catalyst and H2O2 concentrations of 277.01 mg L-1 and 65.37 mg L-1, respectively, at pH 3.4. These conditions achieved 89% and 83% SMX and CIP degradation rates and the TET concentration at 60 min of treatment was lower than the instrumental LOD, confirming the predominance of catalyst photo-Fenton reactions. When applied to a real effluent sample, 71% and 79% SMX and CIP degradation rates were observed, respectively, while no degradation value changes were noted for TET at 60 min. The main reactive species involved in the antibiotic degradation reactions were HO center dot for SMX, O-2(center dot-) and h(+) for CIP, and O-2(center dot-) for TET. In total, 12 antibiotic transformation products (TPs) were identified by LC-QTOF MS. The most frequent TPs observed during antibiotic degradation were formed by hydroxylation, dealkylation, defluorination and hydrolysis of the sulfonamide bond. The investigated mining residue is, therefore, a low-cost and efficient alternative for the photocatalytic degradation of CIP, SMX and TET, contributing to the United Nations Sustainable Development Goals (SDG 6) and follows circular economy principles.

引用

页数：12