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Enhanced adsorption of fluoride from aqueous solution using an iron-modified attapulgite adsorbent.
Water Environ Res. 2013 Feb; 85(2):167-74.WE

Abstract

Attapulgite modified with iron was used as an adsorbent for fluoride removal from aqueous solutions. The pristine attapulgite and the iron-modified attapulgite composite were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) techniques, and the pH point of zero charge measurement. The XRD analysis indicates the existence of iron oxide hydroxide (FeO[OH]) in the iron-modified attapulgite composite. The FT-IR spectra of the iron-modified attapulgite composite before and after adsorption indicate that the involvement of the hydroxide radical in the fluoride adsorption. The effects of pH, contact time, initial concentration, and temperature on fluoride adsorption by the adsorbent were studied in a batch system. Kinetics studies show that the fluoride adsorption kinetics over the adsorbent is well-described by the pseudo-second-order kinetic model. The fluoride adsorption isotherm is well-fitted by the Langmuir model. Desorption studies show that the iron-modified attapulgite adsorbent can be easily regenerated at pH 12.5. The adsorption mechanism is discussed in detail.

Authors+Show Affiliations

School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, China.No affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23472333

Citation

He, Z L., et al. "Enhanced Adsorption of Fluoride From Aqueous Solution Using an Iron-modified Attapulgite Adsorbent." Water Environment Research : a Research Publication of the Water Environment Federation, vol. 85, no. 2, 2013, pp. 167-74.
He ZL, Zhang GK, Xu W. Enhanced adsorption of fluoride from aqueous solution using an iron-modified attapulgite adsorbent. Water Environ Res. 2013;85(2):167-74.
He, Z. L., Zhang, G. K., & Xu, W. (2013). Enhanced adsorption of fluoride from aqueous solution using an iron-modified attapulgite adsorbent. Water Environment Research : a Research Publication of the Water Environment Federation, 85(2), 167-74.
He ZL, Zhang GK, Xu W. Enhanced Adsorption of Fluoride From Aqueous Solution Using an Iron-modified Attapulgite Adsorbent. Water Environ Res. 2013;85(2):167-74. PubMed PMID: 23472333.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Enhanced adsorption of fluoride from aqueous solution using an iron-modified attapulgite adsorbent. AU - He,Z L, AU - Zhang,G K, AU - Xu,W, PY - 2013/3/12/entrez PY - 2013/3/12/pubmed PY - 2013/4/5/medline SP - 167 EP - 74 JF - Water environment research : a research publication of the Water Environment Federation JO - Water Environ. Res. VL - 85 IS - 2 N2 - Attapulgite modified with iron was used as an adsorbent for fluoride removal from aqueous solutions. The pristine attapulgite and the iron-modified attapulgite composite were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) techniques, and the pH point of zero charge measurement. The XRD analysis indicates the existence of iron oxide hydroxide (FeO[OH]) in the iron-modified attapulgite composite. The FT-IR spectra of the iron-modified attapulgite composite before and after adsorption indicate that the involvement of the hydroxide radical in the fluoride adsorption. The effects of pH, contact time, initial concentration, and temperature on fluoride adsorption by the adsorbent were studied in a batch system. Kinetics studies show that the fluoride adsorption kinetics over the adsorbent is well-described by the pseudo-second-order kinetic model. The fluoride adsorption isotherm is well-fitted by the Langmuir model. Desorption studies show that the iron-modified attapulgite adsorbent can be easily regenerated at pH 12.5. The adsorption mechanism is discussed in detail. SN - 1061-4303 UR - https://www.unboundmedicine.com/medline/citation/23472333/Enhanced_adsorption_of_fluoride_from_aqueous_solution_using_an_iron_modified_attapulgite_adsorbent_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1061-4303&date=2013&volume=85&issue=2&spage=167 DB - PRIME DP - Unbound Medicine ER -