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Effect of pH, ionic strength and humic acid on the sorption of uranium(VI) to attapulgite.
Appl Radiat Isot. 2009 Sep; 67(9):1582-90.AR

Abstract

Attapulgite was investigated to remove UO(2)(2+) from aqueous solutions because of its strong sorption capacity. Herein, the attapulgite sample was characterized by Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD) and acid-base titration in detail. Sorption of UO(2)(2+) on attapulgite was strongly dependent on pH values and ionic strength. The presence of humic acid enhanced the sorption of UO(2)(2+) on attapulgite obviously because of the strong complexation of humic acid (HA) with UO(2)(2+) on attapulgite surface. Sorption of UO(2)(2+) on attapulgite was mainly dominated by ion-exchange or outer-sphere complexation at low pH values, and by inner-sphere complexation at high pH values. The results indicated that attapulgite was a suitable material for the preconcentration and solidification of UO(2)(2+) from large volume of solutions because of its negative surface charge and large surface areas.

Authors+Show Affiliations

Radiochemistry Laboratory, Lanzhou University, Lanzhou 730000, Gansu, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

19427225

Citation

Niu, Zhiwei, et al. "Effect of pH, Ionic Strength and Humic Acid On the Sorption of uranium(VI) to Attapulgite." Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine, vol. 67, no. 9, 2009, pp. 1582-90.
Niu Z, Fan Q, Wang W, et al. Effect of pH, ionic strength and humic acid on the sorption of uranium(VI) to attapulgite. Appl Radiat Isot. 2009;67(9):1582-90.
Niu, Z., Fan, Q., Wang, W., Xu, J., Chen, L., & Wu, W. (2009). Effect of pH, ionic strength and humic acid on the sorption of uranium(VI) to attapulgite. Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine, 67(9), 1582-90. https://doi.org/10.1016/j.apradiso.2009.03.113
Niu Z, et al. Effect of pH, Ionic Strength and Humic Acid On the Sorption of uranium(VI) to Attapulgite. Appl Radiat Isot. 2009;67(9):1582-90. PubMed PMID: 19427225.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of pH, ionic strength and humic acid on the sorption of uranium(VI) to attapulgite. AU - Niu,Zhiwei, AU - Fan,Qiaohui, AU - Wang,Wenhua, AU - Xu,Junzheng, AU - Chen,Lei, AU - Wu,Wangsuo, Y1 - 2009/04/09/ PY - 2008/06/23/received PY - 2009/02/24/revised PY - 2009/03/31/accepted PY - 2009/5/12/entrez PY - 2009/5/12/pubmed PY - 2009/5/12/medline SP - 1582 EP - 90 JF - Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine JO - Appl Radiat Isot VL - 67 IS - 9 N2 - Attapulgite was investigated to remove UO(2)(2+) from aqueous solutions because of its strong sorption capacity. Herein, the attapulgite sample was characterized by Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD) and acid-base titration in detail. Sorption of UO(2)(2+) on attapulgite was strongly dependent on pH values and ionic strength. The presence of humic acid enhanced the sorption of UO(2)(2+) on attapulgite obviously because of the strong complexation of humic acid (HA) with UO(2)(2+) on attapulgite surface. Sorption of UO(2)(2+) on attapulgite was mainly dominated by ion-exchange or outer-sphere complexation at low pH values, and by inner-sphere complexation at high pH values. The results indicated that attapulgite was a suitable material for the preconcentration and solidification of UO(2)(2+) from large volume of solutions because of its negative surface charge and large surface areas. SN - 1872-9800 UR - https://www.unboundmedicine.com/medline/citation/19427225/Effect_of_pH_ionic_strength_and_humic_acid_on_the_sorption_of_uranium_VI__to_attapulgite_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0969-8043(09)00355-8 DB - PRIME DP - Unbound Medicine ER -
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