Adsorptive removal of fluoride from drinking water using porous starch loaded with common metal ions. (15th March 2017)

• Record Type: Journal Article
• Authors: Xu, Lingyun; Chen, Guijie; Peng, Chuanyi; Qiao, Huanhuan; Ke, Fei; Hou, Ruyan; Li, Daxiang; Cai, Huimei; Wan, Xiaochun
• Is Part Of: Carbohydrate polymers. Volume 160(2017)
• Page Start: 82
• Page End: 89
• Publication Date: 2017-03-15
• Subjects: Porous starch -- Adsorption -- Fluorine -- Metal ions -- Drinking water; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2016.12.052
• Languages: English
• ISSNs: 0144-8617

Abstract

Graphical abstract: Highlights: Four novel and inexpensive biosorbents were developed for defluoridation of water. Common metal ions (Zr, Al, Fe and La) were loaded onto porous starch (PS). Biosorbents retained metal ions during defluoridation. PS-Zr showed superior adsorption capacity over a pH range of 3.0–9.0. PS-Zr maximum adsorption capacity was 25.41 mg fluoride/g biosorbent. Abstract: In this study, porous corn starch was loaded with Zr, Al, Fe or La to produce the composites PS-Zr, PS-Al, PS-Fe and PS-La. Fluoride adsorption from water was tested at different biosorbent dosages, contact times, solution pH values and initial fluoride concentrations. The biosorbents were characterized by microscopy and spectroscopy. PS-Zr was shown superior defluoridation capacity over a pH range of 3.0–9.0. The adsorption process could be described by the Langmuir isotherm model and the Lagergren pseudo-second-order kinetic model. The maximum fluoride adsorption capacity calculated to be for PS-Zr was 25.41 mg/g. Our results revealed that PS-Zr could be employed as an effective biosorbent for removal of fluoride from drinking water.