Effect of temperature on Hg-cysteine complexes in vermiculite and montmorillonite
Malferrari, D; Brigatti, MF; Marcelli, A; Chu, WS; Wu, ZY; Chu WS(储旺盛); Wu ZY(吴自玉)
刊名APPLIED CLAY SCIENCE
2010
卷号50期号:1页码:12-18
关键词Cysteine Hg Montmorillonite Thermal behaviour Thermal analyses Vermiculite X-ray absorption spectroscopy
学科分类Chemistry; Materials Science; Mineralogy
DOI10.1016/j.clay.2010.05.014
通讯作者Brigatti, MF (reprint author), Univ Modena & Reggio Emilia, Dipartimento Sci Terra, Lgo S Eufemia 19, I-41121 Modena, Italy.
文章类型Article
英文摘要This study describes the influence of temperature on two Hg(II)-cysteine modified clay minerals with different layer charges (i.e., montmorillonite and vermiculite) by using chemical and thermal analyses coupled with evolved gas mass spectrometry (TGA-MSEGA), synchrotron-based X-ray absorption spectroscopy (XAS), and X-ray powder diffraction (XRPD) techniques; these two latter techniques were applied on samples heated "in situ" up to 900 degrees C. Hg bonds cysteine by the thiol group with Hg-SH bond lengths similar in both clay minerals, thus suggesting their independence from layer charge. On the contrary, the thermal behaviour of the adsorbed organometallic complexes was strictly layer charge dependent, as evidenced by decomposition temperatures, which were lower in montmorillonite than in vermiculite. Results from X-ray absorption near edge structure (XANES) spectroscopy evidenced nearly complete Hg desorption in montmorillonite between 600 and 700 degrees C, unlike in vermiculite where Hg was still present at these values. (C) 2010 Published by Elsevier B.V.
类目[WOS]Chemistry, Physical ; Materials Science, Multidisciplinary ; Mineralogy
收录类别SCI
WOS记录号WOS:000283617600002
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225490
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Malferrari, D,Brigatti, MF,Marcelli, A,et al. Effect of temperature on Hg-cysteine complexes in vermiculite and montmorillonite[J]. APPLIED CLAY SCIENCE,2010,50(1):12-18.
APA Malferrari, D.,Brigatti, MF.,Marcelli, A.,Chu, WS.,Wu, ZY.,...&吴自玉.(2010).Effect of temperature on Hg-cysteine complexes in vermiculite and montmorillonite.APPLIED CLAY SCIENCE,50(1),12-18.
MLA Malferrari, D,et al."Effect of temperature on Hg-cysteine complexes in vermiculite and montmorillonite".APPLIED CLAY SCIENCE 50.1(2010):12-18.
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