Reduction and sorption of chromium by Fe(II)-bearing phyllosilicates: Chemical treatments and X-ray absorption spectroscopy (XAS) studies

被引:51
|
作者
Brigatti, MF
Lugli, C
Cibin, G
Marcelli, A
Giuli, G
Paris, E
Mottana, A
Wu, ZY
机构
[1] Univ Modena & Reggio Emilia, Dipartimento Sci Terra, I-41100 Modena, Italy
[2] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy
[3] Univ Camerino, Dipartimento Sci Terra, I-62032 Camerino, MC, Italy
[4] Univ Roma 3, Dipartimento Sci Terra, I-00146 Rome, Italy
[5] CNRS, Ctr Rech Synthese & Chim Mineraux, F-45071 Orleans 2, France
关键词
absorption; chromium; EXAFS; phyllosilicates; reduction; XANES;
D O I
10.1346/CCMN.2000.0480214
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The reduction of hexavalent chromium species in aqueous solutions by interaction with Fe(II)-bearing solid surfaces was studied using a 0.96 x 10(-3)M Cr(VI) solution and iron-rich clays with different Fe(II)/Fe(III) ratios, layer charge, and exchange properties, i.e., chlorite, corrensite, and montmorillonite. Experimental studies demonstrated that Fe(II)-bearing phyllosilicates reduce aqueous Cr(VI) ions at acidic pH. Chlorite and corrensite, owing to the high Fe(II)/Fe(III) ratio, are electrochemically reactive, as rapid Cr(VI) reduction indicated. In contrast, montmorillonite showed minimum to nil reactivity towards Cr(VI). Furthermore, corrensite, which is high in both Fe(II)/Fe(III) ratio and exchange capacity, adsorbs the greatest amount of chromium. X-ray absorption spectroscopy at Al, Mg, Fe, and Cr K-edges was used to investigate the adsorbed chromium species. The montmorillonite sample, unaffected by treatment with Cr(VI) solution, displays no change at any investigated edge. Edge shape and energy also do not change for the Mg and Al spectra in corrensite, and changes are minor in chlorite. By contrast, the Fe K-edge changes both in chlorite and corrensite, and indicates an increase of Fe(III) in treated samples at the expense of pre-existing Fe(II). Cr K-edge spectra show that chlorite and corrensite sorb Cr(III), which implies its reduction from Cr(VI) in the interacting solution.
引用
收藏
页码:272 / 281
页数:10
相关论文
共 50 条
  • [31] X-RAY ABSORPTION SPECTROSCOPY FOR THE CHEMICAL CHARACTERIZATION OF ATMOSPHERIC AEROSOLS
    JAKLEVIC, JM
    THOMPSON, AC
    TRANSACTIONS OF THE AMERICAN NUCLEAR SOCIETY, 1979, 33 (NOV): : 240 - 241
  • [32] Quantification of vanadium precipitates in HSLA steel by synchrotron X-ray absorption spectroscopy (XAS)
    Suwanpinij, Piyada
    Dickert, Hans Henning
    Thammajak, Nirawat
    Srichareonchai, Prasonk
    MATERIALS TESTING, 2016, 58 (01) : 5 - 11
  • [33] XAS a new computer package program for X-ray absorption spectroscopy data analysis
    Aldea, N.
    Kolipaka, K. L.
    Rednic, V.
    Matei, F.
    JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 2011, 13 (11-12): : 1581 - 1585
  • [34] X-ray photoelectron spectroscopy studies of reactions on chromium metal and chromium oxide surfaces
    Payne, B. P.
    Biesinger, M. C.
    McIntyre, N. S.
    JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 2011, 184 (1-2) : 29 - 37
  • [35] X-ray absorption spectroscopy study of the effects of pH and ionic strength on Pb(II) sorption to amorphous silica
    Elzinga, EJ
    Sparks, DL
    ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (20) : 4352 - 4357
  • [36] In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts
    Maoyu Wang
    Líney árnadóttir
    Zhichuan J.Xu
    Zhenxing Feng
    Nano-Micro Letters, 2019, 11 (03) : 178 - 195
  • [37] X-ray absorption spectroscopy studies of bioinorganic models and enzymes
    Hedman, Britt
    Hodgson, Keith O.
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2006, 231
  • [38] X-ray absorption spectroscopy studies of some metal nanocatalysts
    Zhang, Peng
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2018, 256
  • [39] Ultrafast selected energy X-ray absorption spectroscopy (USEXAS) for chemical dynamics studies.
    Guo, T
    Shan, F
    Houchines, C
    Carter, JE
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2004, 227 : U283 - U283
  • [40] In Situ X-ray Absorption Spectroscopy Studies of Nanoscale Electrocatalysts
    Wang, Maoyu
    Arnadottir, Liney
    Xu, Zhichuan J.
    Feng, Zhenxing
    NANO-MICRO LETTERS, 2019, 11 (01)