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Related Concept Videos

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Assessment of Waste-Derived Biochars on the Health and Biological Activity of Soil
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As(V) Sorption/Desorption on Different Waste Materials and Soil Samples.

Ana Quintáns-Fondo1, David Fernández-Calviño2, Juan Carlos Nóvoa-Muñoz3

  • 1Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University of Santiago de Compostela, 27002 Lugo, Spain. anaquintansfondo@hotmail.com.

International Journal of Environmental Research and Public Health
|July 30, 2017
PubMed
Summary

Oak ash and pyritic material effectively remove arsenic(V) from polluted water, demonstrating high sorption and low desorption. Other tested materials showed poor performance for arsenic remediation.

Keywords:
arsenic retention/releasehemp wastemussel shelloak ashpine bark

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Area of Science:

  • Environmental Science
  • Geochemistry
  • Materials Science

Background:

  • Arsenic contamination in water poses significant environmental and health risks.
  • Effective and sustainable methods for arsenic removal are crucial for water purification.

Purpose of the Study:

  • To evaluate the efficacy of various natural materials as bio-sorbents for arsenic(V) removal from contaminated water.
  • To compare the sorption and desorption capacities of oak ash, pine bark, hemp waste, mussel shell, pyritic material, and soil samples.

Main Methods:

  • Batch-type experiments were conducted to assess arsenic(V) sorption and desorption.
  • The performance of different bio-sorbents was analyzed as a function of arsenic(V) concentration.
  • Sorption data were fitted to Langmuir and Freundlich models.

Main Results:

  • Oak ash (>87%) and pyritic material (90%) exhibited high arsenic(V) sorption and low desorption (<7%).
  • Hemp waste, mussel shell, pine bark, and soil samples showed significantly lower sorption and higher desorption rates.
  • Sorption data for soil samples and pyritic material best fitted Langmuir and Freundlich models.

Conclusions:

  • Pyritic material and oak ash are highly efficient bio-sorbents for arsenic(V) removal, suitable for contaminated site remediation.
  • The tested by-products and soil samples are not effective for arsenic(V) retention or removal from polluted water.
  • These findings highlight the potential of specific natural materials in addressing arsenic water pollution challenges.