Effects of γ-irradiation on the Cu<sup>2+</sup> sorption behaviour of NaOH-modified Philippine natural zeolites

Gili, Mon Bryan Z.; Olegario, Eleanor M.

doi:10.1180/clm.2020.34

Cited by 3 publications

(1 citation statement)

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“…The results agree well with the XRD patterns of the Philippine bentonite in previous studies Taaca et al, 2019). The bentonite sample used in the study share several common components with the Philippine natural zeolite reported in our previous studies as they are mined from the same area in Mangatarem, Pangasinan (Gili & Olegario, 2020;Gili, Olegario-Sanchez, & Conato, 2019;Gili, Pares, et al, 2019).…”

Section: X-ray Diffractometrymentioning

confidence: 99%

Characterization of Philippine natural bentonite

Olegario

Gili²,

Çelikin

2021

Exp Results

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Philippine natural bentonite is characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM), chemical analysis, thermogravimetric-differential scanning calorimetry (TG-DSC), and Fourier transform infrared (FTIR) analysis. The cation exchange capacity (CEC) was also measured. XRD shows that the mineral is composed primarily of mordenite, hectorite, and montmorillonite. SEM shows the flaky and porous structure of the bentonite powder. Chemical analyses show that SiO2 (47.90 wt%) and Al2O3 (14.02 wt%) are the major components of the clay. TG-DSC shows that the mineral contains 15.55% moisture. IR transmittance spectrum shows the common vibration bands present in the sample which include O–H stretching of inter-porous water, symmetric and asymmetric stretching of hydroxyl functional groups, asymmetrical stretching of internal tetrahedra (O–Si–O and O–Al–O), symmetrical stretching of external linkages, and so on. The measured CEC were found to be 91.37 and 43.01 meq/100 g according to the ammonium acetate method and barium acetate method, respectively.

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Section: X-ray Diffractometrymentioning

confidence: 99%