https://scholars.lib.ntu.edu.tw/handle/123456789/572727
標題: | Sorption and speciation of molybdate in soils: Implications for molybdenum mobility and availability | 作者: | Yang P.-T SHAN-LI WANG |
關鍵字: | Crystallinity; Iron compounds; Molybdenum; Soils; Sorption; X ray absorption; X ray absorption near edge structure spectroscopy; Acidic soils; Emerging contaminant; High solubility; Minor components; Soil property; Sorption and desorptions; Sorption/Desorption; X-ray absorption near-edge structure; Soil pollution; molybdenum; molybdic acid; absorption; Article; desorption; inductively coupled plasma atomic emission spectrometry; nonhuman; pH; soil acidity; soil chemistry; soil pollution; soil property; solubility; toxicity | 公開日期: | 2021 | 卷: | 408 | 來源出版物: | Journal of Hazardous Materials | 摘要: | Molybdenum (Mo) is an emerging contaminant in the environment. To assess the mobility and availability of Mo in soils, this study investigated the effect of soil properties on the sorption and desorption of Mo in soils. The Mo K-edge X-ray absorption near edge structure (XANES) of the soils after Mo sorption showed that sorbed molybdate was the predominant species, with Fe/Al-molybdate and Ca-molybdate being the minor components in soils with low and high pH levels, respectively. Although acidic soils exhibited higher Mo sorptivity, they exhibited partial reversibility of Mo sorption, which may be attributed to the high solubility of Al-molybdate. Accordingly, the mobility of Mo may be relatively high in soils with a low pH, high exchangeable Al content, and high Fe-hydroxide crystallinity, such as Ultisols and Oxisols. At higher pHs, the sorption irreversibility of molybdate were enhanced due to the formation of Ca-molybdate precipitate. The results of this study indicated that sorption/desorption irreversibility and related mechanisms should be considered when evaluating the mobility and availability of Mo in soils. ? 2020 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85098967601&doi=10.1016%2fj.jhazmat.2020.124934&partnerID=40&md5=b13040d33a0ef29e4cf6d9276b64468c https://scholars.lib.ntu.edu.tw/handle/123456789/572727 |
ISSN: | 3043894 | DOI: | 10.1016/j.jhazmat.2020.124934 |
顯示於: | 農業化學系 |
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