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A thorough investigation into the adsorption behavior of sophorolipid-modified fly ash towards compound pollution of lead and tetracycline.
Ren, Pengyu; Wang, Lu; Ma, Tianhai; Zhao, Yimo; Guo, Bin; Luo, Chi; Li, Shaohua; Ji, Puhui.
Afiliación
  • Ren P; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Wang L; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Ma T; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Zhao Y; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Guo B; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Luo C; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China.
  • Li S; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China. Electronic address: lihua37758@163.com.
  • Ji P; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China. Electronic address: jipuhui1983@nwsuaf.edu.cn.
Sci Total Environ ; 947: 174679, 2024 Oct 15.
Article en En | MEDLINE | ID: mdl-38992370
ABSTRACT
Heavy metal ions and antibiotics were simultaneously detected in authentic water systems. This research, for the first time, employed synthesized sophorolipid-modified fly ash(SFA) to eliminate tetracycline(TC) and lead(Pb2+) from wastewater. Various characterization techniques, including SEM-EDS, FTIR, XPS, BET, and Zeta, were employed to investigate the properties of the SFA. The results showed that the sophorolipid modification significantly improved the fly ash's adsorption capacities for the target pollutants. The static adsorption experiments elucidated the adsorption behaviors of SFA towards TC and Pb2+ in single and binary systems, highlighting the effects of different Environmental factors on the adsorption behavior in both types of systems. In single systems, SFA exhibited a maximum adsorption capacity of 128.96 mg/g for Pb2+ and 55.57 mg/g for TC. The adsorption of Pb2+ and TC followed pseudo-second-order kinetics and Freundlich isotherm models. The adsorption reactions are endothermic and occur spontaneously. SFA demonstrates varying adsorption mechanisms for two different types of pollutants. In the case of Pb2+, the primary mechanisms include ion exchange, electrostatic interaction, cation-π interaction, and complexation, while TC primarily engages in hydrogen bonding, π-π interaction, and complexation. The interaction between Pb2+ and TC has been shown to improve adsorption efficiency at low concentrations. Additionally, adsorption-desorption experiments confirm the reliable cycling performance of modified fly ash, highlighting its potential as a cost-effective and efficient adsorbent for antibiotics and heavy metals.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tetraciclina / Contaminantes Químicos del Agua / Ceniza del Carbón / Plomo Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tetraciclina / Contaminantes Químicos del Agua / Ceniza del Carbón / Plomo Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos