Insight into core -shell microporous zinc silicate adsorbent to eliminate antibiotics in aquatic environment under the COVID-19 pandemic. (10th January 2023)

• Record Type: Journal Article
• Authors: Hu, Xueli; Zhou, Yuanhang; Zhou, Yingying; Bai, Yun; Chang, Ruiting; Lu, Peng; Zhang, Zhi
• Is Part Of: Journal of cleaner production. Volume 383(2023)
• Publication Date: 2023-01-10
• Subjects: Core-shell zinc silicate -- Chloroquine phosphate -- Tetracycline -- Ciprofloxacin -- Adsorption mechanisms; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.135416
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Under the new crown pneumonia (COVID-19) epidemic, the intensive use of therapeutic drugs has caused certain hidden danger to the safety of the water environment. Therefore, the core-shell microporous zinc silicate (SiO2 @ZSO) was successfully prepared and used for the adsorption of chloroquine phosphate (CQ), tetracycline (TC) and ciprofloxacin (CIP) for eliminating the threat of COVID-19. The adsorption efficiencies of 20 mg L −1 of CQ, TC and CIP by SiO2 @ZSO were all up to 60% after 5 min. The adsorption capacity of SiO2 @ZSO for CQ, TC and CIP can reach 49.01 mg g −1, 56.06 mg g −1 and 104.77 mg g −1, respectively. The adsorption process is primarily physical adsorption, which is heterogeneous, spontaneous and preferential. Moreover, the effects of temperature, pH, salinity, and reusability on the adsorption of CQ, TC, and CIP on SiO2 @ZSO were investigated. The adsorption mechanism mainly involves electrostatic attraction, partitioning and hydrogen bonding, which is insightful through the changes of the elements and functional groups before and after adsorption. This work provides a solution to the problems faced by the treatment of pharmaceuticals wastewater under the COVID-19 epidemic. Graphical abstract: Image 1 Highlights: A hydroxyl-rich core-shell microporous SiO2 @ZSO adsorbent was prepared. SiO2 @ZSO exhibited excellent and non-specific adsorption for three drug molecules. The mechanism of SiO2 @ZSO adsorption of antibiotics was revealed. SiO2 @ZSO provides emergency treatment for wastewater under the COVID-19 epidemic.