Absorption and Mobility of Cr and Zn in Soil in the Vicinity of Jordan River

Autor:	Da’san M. M. Jaradat, Giuliana Aquilanti, N. Sawai, R. Jaber, Messaoud Harfouche, Allayth Aldrabee, Ayoup M. Ghrair
Rok vydání:	2016
Předmět:	chemistry.chemical_classification History Coordination sphere Soil test chemistry.chemical_element Mineralogy Sulfur Redox Computer Science Applications Education X-ray absorption fine structure chemistry Organic matter Clay minerals Carbon
Zdroj:	Journal of Physics: Conference Series. 712:012080
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/712/1/012080
Popis:	Sediments from the basin of Jordan River are to some extent significantly contaminated by heavy metals. The goal of this study was to examine the nature of the heavy metals, their mobility, and their binding in the soil matrix in order to understand the accumulation mechanism. Exhaustive mineralogical and geochemical study on the heavy metals in the vicinity of the river will allow knowing the dominant forms of emitted metals. The structural local order around Cr and Zn in soil samples were investigated by analyzing XAFS data. Our investigations show that the coordination sphere, around both Cr and Zn, is constituted of oxygen atoms at an interatomic distance of ~2 A which is close to those in clay minerals. It is also shown that Cr(III) is the most dominating redox state in soil samples. Moreover, the next backscattering neighbors around Zn and Cr are either carbon or sulfur atoms which reveal a multiple and heterogeneous speciation of Cr and Zn with organic matter.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f1b6fdfc4677d7a0e7ce2c42008f04db https://doi.org/10.1088/1742-6596/712/1/012080 Zobrazit plný text záznamu