Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/4180
Title: Fractionation and release behaviors of metals (In, Mo, Sr) from industrial sludge
Authors: Chen J.Y.
Lương, Huỳnh Vủ Thanh
Liu, Jhy Chern
Keywords: Indium
Molybdenum
Redox potential
Sequential extraction
Sludge
Strontium
Issue Date: 2015
Series/Report no.: Water research;82 .- p.86-93
Abstract: Little is known on the fate of rare metals in the environment and the associated risks. The fractionation and release of three metals of an industrial sludge were assessed. The average concentration ranges from 39.3 to 41.5 mg/kg for indium (In), 43.1–77.8 mg/kg for molybdenum (Mo), and 131.1–376.4 mg/kg for strontium (Sr). Sequential extraction results implied that In was mobile, while Mo and Sr were immobile. However, experimental results from effects of Eh/pH revealed that In was slightly mobile under acidic (pH 4.5) in Eh range of 210–260 mV, and immobile under alkaline conditions (9.0) in Eh range of −250 to 125 mV. The release of Mo was slightly mobile under acidic conditions. However, Mo was very mobile under alkaline conditions and it increased with decreasing Eh. The release of Sr was significant under acidic conditions; however, it was immobile under alkaline conditions. Solubility and adsorption as affected by pH, and speciation could explain their release behaviors. Discrepancy in predictions from sequential extraction and actual observation from Eh/pH experiments was discussed.
URI: http://dspace.ctu.edu.vn/jspui/handle/123456789/4180
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