In:
IOP Conference Series: Earth and Environmental Science, IOP Publishing, Vol. 345, No. 1 ( 2019-10-01), p. 012012-
Kurzfassung:
The purpose of this study was to investigate the possibility of the utilization of amine functionalized SiO 2 as an adsorbent for removing Cr(VI). The structure property of adsorbent was characterized by N 2 adsorption-desorption isotherm, XPS, SEM and CO 2 -TPD. The maximum adsorption capacity of amine functionalized SiO 2 was 27.78 mg/g at initial pH=2, which calculated by Langmuir isotherm model. But SiO 2 does not have the ability to adsorb Cr(VI) before functionalized. Additionally, the adsorption can be described by the pseudo-second-order kinetic model, which illustrated that the “surface reaction” was the controlling step in adsorption process. From the result of CO 2 -TPD and adsorption energy, the electrostatic attraction between Cr(VI) species and protonated amine or hydroxyl group were regards as mainly adsorption mechanism.
Materialart:
Online-Ressource
ISSN:
1755-1307
,
1755-1315
DOI:
10.1088/1755-1315/345/1/012012
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2019
ZDB Id:
2434538-6
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