Degradation of ß-lactam antibiotics by Fe(III)/HSO3- system and their quantitative structure-activity relationship.
Environ Res
; 259: 119577, 2024 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-38986801
ABSTRACT
ß-lactam antibiotics, extensively used worldwide, pose significant risks to human health and ecological safety due to their accumulation in the environment. Recent studies have demonstrated the efficacy of transition metal-activated sulfite systems, like Fe(â
¢)/HSO3-, in removing PPCPs from water. However, research on their capability to degrade ß-lactam antibiotics remains sparse. This paper evaluates the degradation of 14 types of ß-lactam antibiotics in Fe(â
¢)/HSO3- system and establishes a QSAR model correlating molecular descriptors with degradation rates using the MLR method. Using cefazolin as a case study, this research predicts degradation pathways through NPA charge and Fukui function analysis, corroborated by UPLC-MS product analysis. The investigation further explores the influence of variables such as HSO3- dosage, substrate concentration, Fe(â
¢) dosage, initial pH and the presence of common seen water matrices including humic acid and bicarbonate on the degradation efficiency. Optimal conditions for cefazolin degradation in Fe(â
¢)/HSO3- system were determined to be 93.3 µM HSO3-, 8.12 µM Fe(â
¢) and an initial pH of 3.61, under which the interaction of Fe(â
¢) dosage with initial pH was found to significantly affect the degradation efficiency. This study not only provides a novel degradation approach for ß-lactam antibiotics but also expands the theoretical application horizon of the Fe(â
¢)/HSO3- system.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Relação Quantitativa Estrutura-Atividade
/
Beta-Lactamas
/
Antibacterianos
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article