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Materials (Basel). 2017 May 6;10(5). pii: E502. doi: 10.3390/ma10050502.

Chromium(VI) Removal from Aqueous Solution by Magnetite Coated by a Polymeric Ionic Liquid-Based Adsorbent.

Author information

1
Area Academica de Quimica, Universidad Autonoma del Estado de Hidalgo, Carr. Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma, Hidalgo 42184, Mexico. alexandrafg21@gmail.com.
2
Area Academica de Quimica, Universidad Autonoma del Estado de Hidalgo, Carr. Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma, Hidalgo 42184, Mexico. josear@uaeh.edu.mx.
3
Area Academica de Quimica, Universidad Autonoma del Estado de Hidalgo, Carr. Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma, Hidalgo 42184, Mexico. paezh@uaeh.edu.mx.
4
Area Academica de Quimica, Universidad Autonoma del Estado de Hidalgo, Carr. Pachuca-Tulancingo Km. 4.5, Mineral de la Reforma, Hidalgo 42184, Mexico. guevaraa@uaeh.edu.mx.
5
Departamento de Química Analítica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain. ebarrado@qa.uva.es.
6
Área de Energías, Universidad Politécnica de Francisco I. Madero, Domicilio Conocido, Tepatepec, Hidalgo C.P. 42640, Mexico. phernandez@upfim.edu.mx.

Abstract

An evaluation of the chromium(VI) adsorption capacity of four magnetite sorbents coated with a polymer phase containing polymethacrylic acid or polyallyl-3-methylimidazolium is presented. Factors that influence the chromium(VI) removal such as solution pH and contact time were investigated in batch experiments and in stirred tank reactor mode. Affinity and rate constants increased with the molar ratio of the imidazolium. The highest adsorption was obtained at pH 2.0 due to the contribution of electrostatic interactions.

KEYWORDS:

adsorption capacity; chromium(VI); ionic liquid; magnetic particles

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