MINED LAND REHAB CONFERENCE

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      • Soil quality monitoring
      • Coal Dissolution Testing
      • Health implications of coal dust in rainwater
      • Honey bees the new canaries for monitoring of mined-land rehabilitation
      • Geomorphic design and modelling at catchment scale for best mine rehabilitation
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  • Home
  • Photo Gallery
  • Sponsors/Exhibitors
    • Sponsors
    • Exhibitors
  • Presenters
    • Oral Presenters >
      • Ravi Naidu
      • Michael Wright
      • Matthew Newton
      • Travis Peake
      • Ingrid Meek
      • Karin Fogarty
      • Rob Loch
      • Maria Eugenia Cola
      • Stephen White
      • Paul Storer
      • Chris Gimber
      • Robert Scanlon
      • ​Clayton Richards
      • Alex Watson
      • Chris Waygood
      • Colin Schiller
      • Scott Sleap
      • Ihsan Noor
  • Workshops
    • Donna Pershke
    • Gilles Tremblay
    • Charles Lee
    • Nanthi Bolan
    • Tim Roberts
    • Yudi Firmanul Arifin
    • Ihsan Noor
    • Amalia Rezeki
  • About Us
    • Our Team
    • Past Conferences >
      • 2018 Mine Rehab Conference >
        • 2018 Presenters >
          • Will Mitry
          • José F. Martín Duque
          • Stephen Barry and Hamish Aiken
          • Stephen White
          • Nanthi Bolan
          • Eduardo Arellano
          • Jo-Anne Everingham
          • Yudi Firmanul Arifin
          • Thomas Baumgartl
          • Gede Widiada
          • Harley Lacy
        • 2018 Workshops >
          • José F. Martín Duque
          • Greg Hancock
          • Jo-Anne Everingham
      • 2017 Mine Rehab Conference >
        • Mine Rehab Registrations
        • 2017 Sponsors
        • Local Information for MLRC
        • Conference Program
        • 2017 Presenters >
          • Matthew Newton
          • Penny Dunstan
          • Travis Peake
          • Karin Fogarty
          • Ben Clibborn​​
          • Neil Griffiths
          • Shannon Mulholland
          • Howard Wildman
          • Nanthi Bolan
          • Laura Kuginis
          • Carmen Castor
          • Didik Triwibowo
          • Chris Gimber & Brad O'Reilly
          • Corinne Unger
          • Simit Raval
          • Greg Hancock
          • Grant Dickins
        • 2017 Panel Discussion >
          • Peter Elliott
          • Stephen Barry
          • Martin Rush​
          • Andrew Keith
          • Matthew Newton
          • Richard Bush
        • 2017 Poster Presenters >
          • Robert Scanlon
          • Angus Carnegie
          • Hannah Alcantara
          • Andrew Keith
          • Yilu Xu
          • Hasintha Wijesekara
          • Shannon Diener
          • John Ritchie
          • Charles Lee
          • Bikram Banerjee
          • Sonia Shilpi
        • 2017 Cocktail Dinner
        • 2017 Workshops >
          • Garry Willgoose
          • Peter Elliott
          • Donna Pershke
          • Simit Raval
          • Michael Hitch
          • Wendy Timms
        • 2017 Mine Tours
        • Information for Exhibitors
        • Delegate Handbook
        • Conference Feedback Survey
        • Mine Tour Feedback Survey
        • Sponsor and Exhibitor Feedback Survey
        • 2017 Mine Rehab Conference - original
      • 2016 Mined Land Conf
      • 2015 Mined Land Conf >
        • Conference Presenters
        • Poster Presentations
        • Supporters
      • 2014 Mined Land Conf
    • Research >
      • Soil quality monitoring
      • Coal Dissolution Testing
      • Health implications of coal dust in rainwater
      • Honey bees the new canaries for monitoring of mined-land rehabilitation
      • Geomorphic design and modelling at catchment scale for best mine rehabilitation
    • Publications
    • News
    • Privacy Policy
  • Contact
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Yilu Xu

University of Newcastle​
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I am studying as a Ph. D. candidature of soil remediation of University of Newcastle. With a background in environmental science and ecology, my research interests include soil carbon sequestration and microbial carbon use efficiency, and heavy metal contaminated soil quality assessment and remediation. I have been working on ‘Soil Carbon Assimilation and Dynamics in Relation with Microbial Carbon Use Efficiency’ as part of my Ph.D. program.

​ Poster Presenters
  • Robert Scanlon​
  • Angus Carnegie
  • Hannah Alcantara
  • Andrew Keith
  • Yilu Xu
  • Hasintha Wijesekara
  • Shannon Diener
  • John Ritchie
  • ​Charles Lee​
  • Bikram Banerjee
  • Sonia Shilpi
​Abstract
​

Heavy metal speciation and availability on soil microorganism activities.

The heavy metal(loid)s contamination is pronounced in soils adjacent to mine sites. As an important habitat to thousands of organisms, soil health condition is crucial to their actives. Consequently, soil microbial functioning exposed to long-term contamination by heavy metals affects the role of soils as a carbon sink. Heavy metal toxicity to soil microorganisms are highly depends on their (potential) availability. Therefore, a thorough research on understanding the relation between heavy metal(loid)s and microorganisms will help to detect soil fertility and contribute to soil organic remediation. 
​
We studied the effects of heavy metal speciation and availability on soil microorganism activities at different cadmium and lead contamination gradients, separately as well as jointly. Soil microbial respiration, microbial biomass carbon were investigated. Microbial PLFAs were also extracted and analysed by gas chromatography combined with GC‒MS, HP 5973. Potential and bio-available heavy metal concentration were extracted by 0.05 M EDTA and 0.1 M CaCl2, respectively. Results showed that depending on the solubility and mobility of the heavy metals, the potential bioavailable heavy metal concentration varied between Cd and Pb. In addition, microbial activity and biomass were both reduced because of metal toxicity.
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Emeritus Professor Tim Roberts
T: +61 2 4921 7037
E: tim.roberts@newcastle.edu.au  

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