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- W2116522017 abstract "The palygorskite is an aluminum-magnesium silicate that has a fibrous morphology. Their physico-chemical characteristics are the result of high surface area, porosity and thermal resistance which make it an attractive adsorbent. Its adsorption capacity can be increased through chemical reactions and/or heat treatments. The objective of this work is to verify the effects of acid activation on the palygorskite, treated with HCl at 90 ºC at concentrations of 2, 4 and 6 mol L-1 in 2 and 4 hours, with clay/acid solution ratio 1 g 10 mL-1 and characterized by techniques: XRF, XRD and surface area. A significant increase in specific surface area was observed in the sample treated with HCl at the concentration 6 mol L-1. The changes were more pronounced at stricter concentrations of acidity, with decreasing intensity of reflection of the clay indicated in the XRD. These changes were confirmed in the XRF with the leaching of some oxides and with increasing concentration of SiO2." @default.
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- W2116522017 date "2014-05-09" @default.
- W2116522017 modified "2023-10-14" @default.
- W2116522017 title "Effects of acid treatment on the clay palygorskite: XRD, surface area, morphological and chemical composition" @default.
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- W2116522017 doi "https://doi.org/10.1590/s1516-14392014005000057" @default.
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