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Carbon doping enhances the fluoride removal performance of aluminum-based adsorbents.
Tong, Lin; Miao, Ying; Li, Shushu; Bao, Ning; Zhou, Qingwen; Yang, Yuhuan; Ye, Changqing.
Afiliación
  • Tong L; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Miao Y; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Li S; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Bao N; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Zhou Q; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Yang Y; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.
  • Ye C; School of Public Health, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China. cqye@ntu.edu.cn.
Environ Sci Pollut Res Int ; 31(23): 33780-33793, 2024 May.
Article en En | MEDLINE | ID: mdl-38689041
ABSTRACT
Excessive fluoride presence in water poses significant environmental and public health risks, necessitating the development of effective remediation techniques. Conventional aluminum-based adsorbents face inherent limitations such as limited pH range and low adsorption capacity. To overcome these challenges, we present a facile solvent-thermal method for synthesizing a carbon-doped aluminum-based adsorbent (CDAA). Extensive characterization of CDAA reveals remarkable features including substantial carbon-containing groups, unsaturated aluminum sites, and a high pH at point of zero charge (pHpzc). CDAA demonstrates superior efficiency and selectivity in removing fluoride contaminants, surpassing other adsorbents. It exhibits exceptional adaptability across a broad pH spectrum from 3 to 12, with a maximum adsorption capacity of 637.4 mg/g, more than 110 times higher than alumina. The applicability of the Langmuir isotherm and pseudo-second-order models effectively supports these findings. Notably, CDAA exhibits rapid kinetics, achieving near-equilibrium within just 5 min. Comprehensive analyses utilizing Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) offer detailed insights into the mechanisms involving electrostatic attraction, ion exchange, and ligand exchange. Carbon-based groups play a role in ligand exchange processes, synergistically interacting with the unsaturated aluminum structure to provide a multitude of adsorption sites. The exceptional attributes of CDAA establish its immense potential as a transformative solution for the pressing challenge of fluoride removal from water sources.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Carbono / Purificación del Agua / Aluminio / Fluoruros Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Carbono / Purificación del Agua / Aluminio / Fluoruros Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article Pais de publicación: Alemania