Silvetti, Margherita and Castaldi, Paola and Holm, Peter E. and Deiana, Salvatore Andrea and Lombi, Enzo (2014) Leachability, bioaccessibility and plant availability of trace elements in contaminated soils treated with industrial by-products and subjected to oxidative/reductive conditions. Geoderma, Vol. 214–215 , p. 204-212. ISSN 0016-7061. eISSN 1872-6259. Article.
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Two industrial by products, red mud (RM) and aluminum-rich water treatment residue (Al-WTR) were used (2% w/w) for the immobilization of As, Cu and Pb in two polluted soils. Soil-1 was a mine contaminated soil (2428 As, 234 Cu and 559 Pb mg kg−1); Soil-2 was a chromated copper arsenate contaminated soil (860 and 1500 mg kg−1 of As and Cu respectively). Two different redox conditions (aerobic and 3 repeated reduction/oxidation cycles) were also applied. The immobilization of trace elements and their bioaccessibility were evaluated through a leaching test and simplified bioaccessibility extraction test (SBRC) respectively, whereas phytoavailability was assessed in pot trials with Lolium perenne.
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