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| Titel |
Soil Cadmium Removal by Fulvic Acid-aided Hydroxyapatite Nanofluid |
| VerfasserIn |
Jie Zhuang, Qi Li, Xin Chen, Xijuan Chen |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250146980
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| Publikation (Nr.) |
 EGU/EGU2017-11058.pdf |
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| Zusammenfassung |
| Engineered nanoparticles have a large potential for removing pollutants from contaminated
soils. Elution of soil cadmium (Cd) by hydroxyapatite nanoparticles (nHAP) was
investigated at different concentrations of nHAP and fulvic acid (FA). The adsorption
capacity of Cd on nHAP was almost 123 times of that on the experimental loam
soil. The nHAP nanofluid at 500 mg L−1increased the elution rate of soil Cd by
∼4.34 times (from 0.64% to 2.78%) compared with nHAP-free background solution.
Increasing nHAP concentration enhanced Cd removal due to the improvement of nHAP
transport through the soil. The peak breakthrough levels (C/C0) of nHAP at high input
concentration (500 mg L−1) was 2.4 times of that at low concentration (100 mg L−1). The
elution rate of soil Cd further increased to 3.31% after adding 20 mg L−1of FA to the
500 mg L−1nHAP nanofluid. This is primarily attributed to the increase in nHAP
mobility and adsorption capacity of Cd on nHAP. Approximately 43% of nHAP (input
concentration 500 mg L−1)readily passed through the packed soil in the presence of
FA (20 mg L−1) in the influent. Results suggest that nHAP nanofluid could act
as an effective tool to remove Cd from contaminated soil under flow conditions. |
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