Abiotic anoxic reduction of AsO4 adsorbed Mg(II)–Al(III)/Fe(III)–CO3/SO4 Layered Double Hydroxides: Implications of As release and phase transformations
作者： Xiaoyang Lu , Mario Alberto Gomez , Bing Han , Ruonan Jiang , Xu Ma
DOI: 10.1016/J.APGEOCHEM.2020.104765
关键词:
摘要: Abstract In this work, the stability of arsenate adsorbed Mg(II)–Al(III)/Fe(III)–CO3/SO4 Layered Double Hydroxides (LDHs) under three abiotic anoxic reductive conditions that may be encountered in Tailings Management Facilities (TMFs) were evaluated. At pH 8 and 10 mM Fe(II) (aq), formation Fe(III)-oxy/hydroxides (FeOHs) occurred for all 5 LDHs but Fe-based precipitated greatest amounts. All released MgAlFeCO3SO4 > MgAlCO3 > MgFeCO3/MgFeSO4. The solid surfaces remained as As(V) except MgAlSO4, MgAlCO3, MgAlFeCO3SO4 where 10–25% As(III) formed. Finally, at 10 0.5 mM FeOHs to various degrees a significant amount CaCO3(s) precipitated. A 2-stage release re-adsorption mechanism total As(aq) following order: MgAlFeCO3SO4 > MgAlSO4 > MgFeCO3 > MgAlCO3 > MgFeSO4. portion (30–90%) was found reacted LDHs. This work provides guideline environmental behavior relevant underwater cover TMF reducing exist.
sci-hub.st 参考文章(116)
Jian-Xin Fan, Yu-Jun Wang, Cun Liu, Li-Hua Wang, Ke Yang, Dong-Mei Zhou, Wei Li, Donald L. Sparks, Effect of iron oxide reductive dissolution on the transformation and immobilization of arsenic in soils: New insights from X-ray photoelectron and X-ray absorption spectroscopy Journal of Hazardous Materials. ,vol. 279, pp. 212- 219 ,(2014) , 10.1016/J.JHAZMAT.2014.06.079
Brett J. Moldovan, D. T. Jiang, M. Jim Hendry, Mineralogical characterization of arsenic in uranium mine tailings precipitated from iron-rich hydrometallurgical solutions. Environmental Science & Technology. ,vol. 37, pp. 873- 879 ,(2003) , 10.1021/ES025947A
Katja Amstaetter, Thomas Borch, Philip Larese-Casanova, Andreas Kappler, Redox Transformation of Arsenic by Fe(II)-Activated Goethite (α-FeOOH) Environmental Science & Technology. ,vol. 44, pp. 102- 108 ,(2010) , 10.1021/ES901274S
Hossain M. Anawar, Junji Akai, Hiroshi Sakugawa, Mobilization of arsenic from subsurface sediments by effect of bicarbonate ions in groundwater. Chemosphere. ,vol. 54, pp. 753- 762 ,(2004) , 10.1016/J.CHEMOSPHERE.2003.08.030
J.Theo Kloprogge, Ray L. Frost, Fourier Transform Infrared and Raman Spectroscopic Study of the Local Structure of Mg-, Ni-, and Co-Hydrotalcites Journal of Solid State Chemistry. ,vol. 146, pp. 506- 515 ,(1999) , 10.1006/JSSC.1999.8413
E. Krause, V.A. Ettel, Solubilities and stabilities of ferric arsenate compounds Hydrometallurgy. ,vol. 22, pp. 311- 337 ,(1989) , 10.1016/0304-386X(89)90028-5
Mario A. Gomez, Jean-Francois Le Berre, Hassane Assaaoudi, George P. Demopoulos, Raman spectroscopic study of the hydrogen and arsenate bonding environment in isostructural synthetic arsenates of the variscite group—M3+ AsO4·2H2O (M3+ = Fe, Al, In and Ga): implications for arsenic release in water Journal of Raman Spectroscopy. ,vol. 42, pp. 62- 71 ,(2011) , 10.1002/JRS.2639
Xubo Gao, Yanxin Wang, Qinhong Hu, Chunli Su, Effects of anion competitive adsorption on arsenic enrichment in groundwater. Journal of Environmental Science and Health Part A-toxic\/hazardous Substances & Environmental Engineering. ,vol. 46, pp. 471- 479 ,(2011) , 10.1080/10934529.2011.551726
Susanta Paikaray, M. Jim Hendry, In situ incorporation of arsenic, molybdenum, and selenium during precipitation of hydrotalcite-like layered double hydroxides Applied Clay Science. ,vol. 77, pp. 33- 39 ,(2013) , 10.1016/J.CLAY.2013.03.016
Thomas M. Jeitner, Optimized ferrozine-based assay for dissolved iron. Analytical Biochemistry. ,vol. 454, pp. 36- 37 ,(2014) , 10.1016/J.AB.2014.02.026