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- W1975742012 abstract "This study prepared and tested a new class of iron phosphate (vivianite) nanoparticles synthesized with sodium carboxymethyl cellulose (CMC) as a stabilizer for in situ immobilization of lead (Pb2+) in soils. Batch test results showed that the CMC-stabilized nanoparticles can effectively reduce the TCLP (toxicity characteristic leaching procedure) leachability and PBET (physiologically-based extraction test) bioaccessibility of Pb2+ in three representative soils (calcareous, neutral, and acidic). When the soils were treated for 56 days at a dosage ranging from 0.61 to 3.0 mg/g-soil as PO43-, the TCLP leachability of Pb2+ was reduced by 85–95%, whereas the bioaccessibility was lowered by 31–47%. Results from a sequential extraction procedure showed a 33–93% decrease of exchangeable Pb2+ and carbonate-bound fractions, and an increase in residual-Pb2+ fraction when Pb2+-spiked soils were amended with the nanoparticles. Addition of chloride in the treatment further decreased the TCLP-leachable Pb2+ in soils, suggesting the formation of chloro-pyromorphite minerals. Compared to soluble phosphate used for in situ metal immobilization, application of the iron phosphate nanoparticles results in ∼50% reduction in phosphate leaching into the environment." @default.
- W1975742012 created "2016-06-24" @default.
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- W1975742012 date "2007-06-01" @default.
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- W1975742012 title "Reducing leachability and bioaccessibility of lead in soils using a new class of stabilized iron phosphate nanoparticles" @default.
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- W1975742012 doi "https://doi.org/10.1016/j.watres.2007.03.026" @default.
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