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Mr. Patrick Sharrock

Mr. Patrick Sharrock. Université de Toulouse, Mines ALBI . FRANCE. Nacira Belaicha 1 , Wahiba Lemlikchi 1 , Med Oimar Mecherri 1 , Patrick Sharrock 2 , Ange Nzihou 2. Real permeable barrier construction…. Reactive barrier contents: ZVI Zeolites, clays, Organic matter Calcium phosphates?.

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Mr. Patrick Sharrock

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  1. Mr. Patrick Sharrock Université de Toulouse, Mines ALBI FRANCE

  2. Nacira Belaicha1, Wahiba Lemlikchi1, Med Oimar Mecherri1, Patrick Sharrock2, Ange Nzihou2

  3. Real permeable barrier construction….

  4. Reactive barrier contents: ZVI Zeolites, clays, Organic matter Calcium phosphates?

  5. Chanvre Hemp

  6. hydroxyapatite, Ca5(PO4)3OH, fluoroapatite, Ca5(PO4)3F Stable products of calcium and phosphorous Phosphate ores comprise animal bone residues photo by Alain Darbellay, GGGems.com.

  7. Reaction mechanism HYDROXYAPATITE (Ca5)(PO4)3OH (Ca,Zn)5(PO4)3OH CONTAMINANTS Zn2+ Thermodynamically favorable reactions. (Ca,Pb)5(PO4)3OH Pb5(PO4)3Br Zn5(PO4)3F Cu5(PO4)3OH Cd5(PO4)3OH Ca5(AsO4)3OH (UO2)3(PO4)2•8H2O

  8. Mechanisms of Metal Interaction at the Mineral-Water Interface Surface precipitation Co-precipitation Adsorption Water Mineral surface layers xZn2+ + Ca10(PO4)6(OH)2  (10-x)Ca2+ + Ca10-xZnx(PO4)6(OH)2

  9. Composites tested: Plaster + hydroxyapatite (HA or duck bone) Plaster + hydroxyapatite + fibers

  10. use two parts plaster to one part water

  11. Natural porosity of plaster…

  12. Experimental set-up for testing porous plaster filter

  13. 1% fibers 2% fibers

  14. Mechanical strength of synthetic Ha

  15. Mechanical strength ofduck bone calcinated Ha

  16. Tensile strength decreases when bone HA increases

  17. Tensile strength decreases as porous bone HA increases

  18. Plaster-HA composite retains zinc ions

  19. Composite with more HA retains more zinc

  20. Amount of zinc removed decreases with increase in flow rate

  21. Composite material can retain heavy metals and avoid dispersion of fine metal phosphates

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