Field demonstration of in situ immobilization of soil Pb using P amendments

Chen, Ming; Lena, Q.; Singh, Satya Pal; Cao, Rocky X; Melamed, Ricardo

doi:10.1016/s1093-0191(02)00145-4

Cited by 121 publications

(66 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We concluded that these metals were mainly immobilized by fluorapatite but other minerals such as calcium carbonate also contribute to their immobilization. In the case of lead two mechanisms are proposed: the Ca 10 (PO 4 ) 6 F 2 dissolution followed by the precipitation of (Ca,Pb) 10 (PO 4 ,CO 3 ) 6 (OH,F,Cl) 2.56 .1.5H 2 O and CaCO 3 dissolution with the formation of a PbCO 3 . The occurrence of this second mechanism improves the uptake efficiency but contribute to the increases of lead bioavailability because lead carbonate is more soluble than fluorpyromorphite.…”

Section: +mentioning

confidence: 99%

“…It showed an additional peak at 2θ = 30.91 and a modification in the relative intensity of the fluorapatite peaks at 2θ = 31.94, 2θ = 32.26 and 2θ = 33.11 in relation to non-treated sample. This changes was attributed to the formation of a solid solution of Ca and Pb such as (Ca,Pb) 10 (PO 4 ,CO 3 ) 6 (OH,F,Cl) 2.56 .1.5H 2 O. 16 In addition to this fluorapatite solid solution, the XRD patterns of the PRA and PRD samples also showed two intense peaks at These above results indicated that Pb 2+ uptake by PRs involves not only one but two mechanisms: the dissolution of fluorapatite and calcite followed by precipitation of a Ca and Pb apatite solid solution and cerussite.…”

Section: +mentioning

confidence: 99%

“…7,8 Recently, in situ studies have been conducted with success. [8][9][10][11][12] However, the use of PRs in remediation of soils and wastes does not only depend on the effectiveness of the removal process but mainly on the stability of the new metal phases formed. A high bioavailability of this new metal phase could limit the use of PRs in situ applications.…”

Section: Introductionmentioning

confidence: 99%

“…Concluímos que estes metais são principalmente imobilizados por fluorapatita, mas outros minerais tais com carbonatos de cálcio contribuem para esta imobilização. No caso do chumbo, dois mecanismos são propostos: a dissolução da Ca 10 (PO 4 ) 6 F 2 seguida pela precipitação de (Ca,Pb) 10 (PO 4 ,CO 3 ) 6 (OH,F,Cl) 2.56 .1.5H 2 O e a dissolução de CaCO 3 com formação de PbCO 3 . Este segundo mecanismo aumenta a eficiência do processo de remoção, mas contribui para tornar o chumbo mais biodisponível porque o carbonato de chumbo é mais solúvel que a fluorpiromorfita.…”

unclassified

See 3 more Smart Citations

Pb 2+, Cu 2+and Cd 2+ ions uptake by Brazilian phosphate rocks

Mavropoulos¹,

Rocha

Moreira

et al. 2005

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

concentrations from aqueous solutions. We concluded that these metals were mainly immobilized by fluorapatite but other minerals such as calcium carbonate also contribute to their immobilization. In the case of lead two mechanisms are proposed: the Ca 10 (PO 4 ) 6 F 2 dissolution followed by the precipitation of (Ca,Pb) 10 (PO 4 ,CO 3 ) 6 (OH,F,Cl) 2.56 .1.5H 2 O and CaCO 3 dissolution with the formation of a PbCO 3 . The occurrence of this second mechanism improves the uptake efficiency but contribute to the increases of lead bioavailability because lead carbonate is more soluble than fluorpyromorphite. This fact could limit the use of PRs for remediation of contaminated soils and wastes. The Cu 2+ and Cd 2+ removal by PRs is controlled by adsorption mechanisms but dissolution /precipitation mechanisms also occur. In the case of Cu 2+ , fluorapatite dissolution followed by Cu 2 (PO 4 )(OH) precipitation.

show abstract

Section: +mentioning

confidence: 99%

Section: +mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

unclassified

See 2 more Smart Citations

Pb 2+, Cu 2+and Cd 2+ ions uptake by Brazilian phosphate rocks

Mavropoulos¹,

Rocha

Moreira

et al. 2005

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Des travaux [11,12] ont démontré la faible solubilité dans l'eau et la grande stabilité des apatites de plomb, hydroxypyromorphite, Pb 10 (PO 4 ) 6 (OH) 2 , soulignant l'intérêt des apatites en terme de dépollution d'effluents aqueux mais également de sols contaminés [13,14] . Une étude de faisabilité de l'immobilisation du plomb par les cendres de combustion des farines animales dans des milieux aqueux a donc été réalisée.…”

Section: +unclassified

Les cendres issues de l’incinération de farines animales : déchets ou produits valorisables ?

Deydier¹,

Guilet²,

Damia³

et al. 2005

Environnement, Ingénierie &Amp; Développement

View full text Add to dashboard Cite

Depuis l'épizootie d'encéphalopathie spongiforme bovine (ESB) en Europe dans les années 90, les farines animales de viande sont retirées de l'alimentation pour bétail et doivent être détruites ou transformées. Parmi les différentes solutions envisagées, l'incinération offre une perspective de valorisation thermique en exploitant le fort pouvoir calorifique supérieur des farines animales. Cependant, même si leur combustion est une source importante d'énergie, l'incinération produirait de grandes quantités de cendres (20 à 35 % du poids initial selon leur origine). A l'échelle de la France par exemple, la production annuelle de farines animales est d'environ 850 000 t. Dans le cadre d'une incinération systématique, la quantité de cendres produites (plus de 150 000 t/an) poserait la question de leur valorisation. Les cendres de combustion présentent des teneurs élevées en calcium (proche de 31 % en masse) et en phosphates (environ 56 % en masse). L'analyse par diffraction des rayons X montre la présence de phosphates de calcium, un mélange majoritairement constitué de Ca 10 (PO 4 ) 6 (OH) 2 et β-Ca 3 (PO 4 ) 2 . Parmi les différentes voies de valorisation envisagées, nos travaux démontrent que les cendres de farines animales présentent une forte capacité à immobiliser le plomb (environ 275 mg/g de cendres) en solution, permettant d'envisager un débouché dans l'environnement. Ces travaux démontrent également qu'elles peuvent être considérées comme source de phosphate pour l'industrie (production d'acide phosphorique, engrais …).Since the widespread occurrence of bovine spongiform encephalopathy (BSE) in the 1990's in Europe, Meat and bone meal (MBM) have been banned from animal feed and must be safely disposed of or transformed. Among the different processes studied, valorisation of MBM can be realised by a thermal treatment. Even if MBM combustion releases high energy, incineration produces huge amounts of ashes (20 to 35 % of the initial weight depending of their origin), the valorisation of which could become a major concern. In France for example, with nearly 850 000 t of MBM produced each year, ashes production would exceed 150 000 t/year. Combustion ashes present high level of Calcium (nearly 31 % weight) and phosphates (around 56 % weight). X ray diffraction analysis of ashes show the presence of calcium phosphates mainly as a mixture of Ca 10 (PO4) 6 (OH) 2 and b-Ca 3 (PO 4 ) 2 . In our search for new valorisation ways, we show that ashes display high lead uptake capacity in water (about 275 mg/g of ashes) and could then be used for pollution remediation. This work also underlines that MBM ashes can present a phosphate source for industries (phosphoric acid production, agricultural soil enrichment…).

show abstract

Lead in Water and Soil: Speciation, Toxicity, and Treatment Technologies

Manecki

2019

Encyclopedia of Water

View full text Add to dashboard Cite

Lead (Pb) is widely distributed in the environment and its negative health effects, especially to children, have been well documented. The aqueous species of Pb, in their form and concentration, strongly depend on mineral–water interaction processes in the environment. Lead exists in the environment mostly in the form of solid particles but bioavailable toxic Pb is absorbed by living organisms through solution. Therefore, our understanding of formation, transformation, dissolution, and precipitation of Pb‐bearing phases in aqueous solutions is critical for successful strategies to minimize Pb in drinking water or food and to prevent exposure and poisoning. This article summarizes our current understanding of processes governing the presence of Pb in waters and soils, briefly discusses Pb toxicity, and reviews some key technologies for immobilizing Pb and making it less bioavailable. Finally, the article ends with some suggestions for further research.

show abstract

Field demonstration of in situ immobilization of soil Pb using P amendments

Cited by 121 publications

References 19 publications

Pb 2+, Cu 2+and Cd 2+ ions uptake by Brazilian phosphate rocks

Pb 2+, Cu 2+and Cd 2+ ions uptake by Brazilian phosphate rocks

Les cendres issues de l’incinération de farines animales : déchets ou produits valorisables ?

Lead in Water and Soil: Speciation, Toxicity, and Treatment Technologies

Contact Info

Product

Resources

About