Ultrasound-assisted adsorption on porous ceramic for removal of iron in water. Issue 8 (3rd April 2022)

• Record Type: Journal Article
• Authors: Negris, Luana; Santos, Hélisson N.; Picoloto, Rochele S.; Alves, Felipe E. A.; Flores, Erico M. M.; Santos, Maria F. P.; Vicente, Maristela A.
• Is Part Of: Environmental technology. Volume 43:Issue 8(2022)
• Page Start: 1211
• Page End: 1224
• Publication Date: 2022-04-03
• Subjects: Groundwater treatment -- water treatment -- porous ceramic -- ultrasound -- removal of iron; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2020.1822923
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: This study proposes the use of an ultrasound-assisted adsorption system coupled to porous ceramic fragments to improve the removal of iron from FeSO4 aqueous solution. Ultrasound was applied using an ultrasound bath at a low frequency (37 kHz, 330 W). The optimized conditions for Fe removal were achieved by 7 g of adsorbent, 40 min of sonication, 20 mg L –1 of initial Fe concentration, and 30 °C of reaction temperature. After optimizing the conditions, the method was applied for the removal of iron in groundwater. A central composite design and response surface methodology were used to evaluate the degree to which different variables had a significant effect on iron removal. The efficiency of iron removal using the selected conditions for FeSO4 solution was near to 100%. However, for groundwater samples, the maximum iron removal efficiencies of the system with and without ultrasound were 80.7% and 51.1%, respectively, indicating that the adsorption with ultrasound was significantly higher than that without ultrasound. It was shown that the proposed ultrasound-assisted adsorption system can be used to enhance the removal of inorganic iron from groundwater. GRAPHICAL ABSTRACT: UF0001