Structural-phase transformations in bentonite after acid treatment | Zendy

М. Vlasova | Zendy; G. DominguezPatiño | Zendy; N. G. Kakazey | Zendy; Martha Lilia Domínguez-Patiño | Zendy; D. Juárez-Romero | Zendy; Enríquez Méndez | Zendy

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Structural-phase transformations in bentonite after acid treatment

Author(s) -

М. Vlasova,

G. DominguezPatiño,

N. G. Kakazey,

Martha Lilia Domínguez-Patiño,

D. Juárez-Romero,

Enríquez Méndez

Publication year - 2003

Publication title -

science of sintering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.309

H-Index - 25

eISSN - 1820-7413

pISSN - 0350-820X

DOI - 10.2298/sos0303155v

Subject(s) - montmorillonite , bentonite , hydrochloric acid , intercalation (chemistry) , fourier transform infrared spectroscopy , gypsum , materials science , phase (matter) , dehydration , ion exchange , cation exchange capacity , inorganic chemistry , barium , microanalysis , chemistry , nuclear chemistry , chemical engineering , ion , organic chemistry , geology , metallurgy , composite material , biochemistry , soil science , engineering , soil water

The methods of X-ray diffraction, Fourier transform infra-red spectroscopy (FTIR), X-ray microanalysis, electron microscopy, BET and cation exchange capacity (CEC) were used for investigation of the structural-phase transformations in bentonite under the influence of hydrochloric acid and temperature treatment (100-800ºC). It is established that in HCl medium during temperature treatment, dehydration and dehydroxilation of montmorillonite occur. The presence of gypsum and barium chloride results in an intercalation of interlayer space of montmorillonite by Ca and Ba ions Temperature treatment of intercalated montmorillonite leads to the formation of pores

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