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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
Fan, JX; Wang, YJ; Liu, C; Wang, LH; Yang, K; Zhou, DM; Li, W; Sparks, DL; yjwang@issas.ac.cn; dmzhou@issas.ac.cn
2014
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume279Pages:212—219
AbstractThe geochemical behavior and speciation of arsenic (As) in paddy soils is strongly controlled by soil redox conditions and the sequestration by soil iron oxyhydroxides. Hence, the effects of iron oxide reductive dissolution on the adsorption, transformation and precipitation of As(III) and As(V) in soils were investigated using batch experiments and synchrotron based techniques to gain a deeper understanding at both macroscopic and microscopic scales. The results of batch sorption experiments revealed that the sorption capacity of As(V) on anoxic soil was much higher than that on control soil. Synchrotron based X-ray fluorescence (mu-XRF) mapping studies indicated that As was heterogeneously distributed and was mainly associated with iron in the soil. X-ray absorption near edge structure (XANES), micro-X-ray absorption near edge structure (mu-XANES) and X-ray photoelectron spectroscopy (XPS) analyses revealed that the primary speciation of As in the soil is As(V). These results further suggested that, when As(V) was introduced into the anoxic soil, the rapid coprecipitation of As(V) with ferric/ferrous ion prevented its reduction to As(III), and was the main mechanism controlling the immobilization of As. This research could improve the current understanding of soil As chemistry in paddy and wetland soils. (C) 2014 Elsevier B.V. All rights reserved.
Keyword16 Chinese Soils Physiochemical Properties Adsorption Capacity Surface-chemistry Paddy Soils Sorption Ferrihydrite Speciation Release Xps
Indexed BySCI
Language英语
WOS IDWOS:000343390100027
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14101
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authoryjwang@issas.ac.cn; dmzhou@issas.ac.cn
Recommended Citation
GB/T 7714
Fan, JX,Wang, YJ,Liu, C,et al. 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[J]. JOURNAL OF HAZARDOUS MATERIALS,2014,279:212—219.
APA Fan, JX.,Wang, YJ.,Liu, C.,Wang, LH.,Yang, K.,...&dmzhou@issas.ac.cn.(2014).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,279,212—219.
MLA Fan, JX,et al."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 279(2014):212—219.
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