Immobilization of Lead from Pb-Contaminated Soil Amended with Peat Moss
نویسندگان
چکیده
منابع مشابه
Formation of chloropyromorphite in a lead-contaminated soil amended with hydroxyapatite.
Conversion of soil Pb to pyromorphite [Pb5(PO4)3Cl] was evaluated by reacting a Pb contaminated soil collected adjacent to a historical smelter with hydroxyapatite [Ca5(PO4)3OH]. In a dialysis experiment where the soil and hydroxyapatite solids were placed in separate dialysis bags suspended in 0.01 M NaNO3 solution a crystalline precipitate, identified as chloropyromorphite, formed on the dial...
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This paper examines the potential value of phosphate-solubilizing bacteria(PSB) in the dissolution of soil phosphorus and in the subsequent immobilization of lead (Pb), both in bacterial growth medium and in soil. In growth medium, Pseudomonas chlororaphis showed both phosphate-solubilizing and Pb-immobilizing capability, the immobilization of Pb was attributed to pyromorphite formation, as ind...
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Phosphate rock (PR) and phosphoric acid (PA) are an effective combination of P sources for immobilizing Pb in contaminated soils. This column experiment examined the effectiveness of different application methods on Pb immobilization in a contaminated soil. Phosphate was applied at a P/Pb molar ratio of 4 with half as PR and half PA. While PR was mixed with the soil or placed as a layer, aqueou...
متن کاملField assessment of lead immobilization in a contaminated soil after phosphate application.
A pilot-scale field demonstration was conducted at a Pb-contaminated site to assess the effectiveness of Pb immobilization using P amendments. The test site was contaminated by past battery recycling activities, with average soil Pb concentration of 1.16%. Phosphate amendments were applied at a 4.0 molar ratio of P/Pb with three treatments: T1, 100% P from H(3)PO(4); T2, 50% from H(3)PO(4)+50% ...
متن کاملThe Source of Airborne Lead: Recycling Pb-Contaminated Soils
Starting in the 1970s, federal regulatory control and eventual elimination of lead-based “antiknock” additives in gasoline decreased the level of airborne Pb in the USA by two orders-ofmagnitude [1]. Blood lead levels of the USA population decreased correspondingly [2,3]. Despite this dramatic improvement in both exposure risk and body burden of Pb, the sources and health threat of the low leve...
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ژورنال
عنوان ژورنال: Journal of Chemistry
سال: 2013
ISSN: 2090-9063,2090-9071
DOI: 10.1155/2013/509520