NDLI: Surface interaction of humic acids with natural and synthetic phillipsite

Content Provider	Springer Nature Link
Author	Colella, A. Gennaro, B. Salvestrini, S. Colella, C.
Copyright Year	2015
Abstract	Starting from previous encouraging results, pointing out the ability of natural zeolites to remove large, hydrophilic, organic molecules from water, this paper deals with the surface interactions between humic acids, a frequent contaminant of natural waters, and the zeolite phillipsite, with the aim to obtain valuable insights on the possible use of low-cost, natural phillipsite-rich materials in decontamination technology. Accordingly, an enriched sample of Neapolitan yellow tuff, containing ca. 70 % phillipsite, was compared with a synthetic phillipsite in both kinetic and equilibrium sorption experiments of humic acids from model waters. Tests, carried out at 25 °C, were performed on Ca$^{2+}$-pre-exchanged samples, which proved to be more effective in the sorption process. The results highlighted the marked affinity of phillipsite for the humic acids, better than any other zeolite tested previously, pointing out, moreover, that natural phillipsite behaves as a slightly diluted phillipsite, with no adverse effects from the mineral impurities present in the sample. Moreover, natural phillipsite performance, in both kinetic tests and in sorption capacity, was comparatively better than the synthetic counterpart, which was attributed to the presence of structural defects in the latter, due to the stressing conditions under which it had been obtained.
Starting Page	501
Ending Page	509
Page Count	9
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	22
Issue Number	2
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2015-02-24
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sorption Humic acids Zeolite Natural phillipsite Synthetic phillipsite Catalysis Characterization and Evaluation of Materials Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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