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Comparison of synthetic rhamnolipids as chemical precipitants for Pb, La, and Mg.
McCawley, Ida A; Maier, Raina M; Hogan, David E.
Afiliación
  • McCawley IA; Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA.
  • Maier RM; Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA.
  • Hogan DE; Department of Environmental Science, The University of Arizona, Tucson, AZ 85721, USA. Electronic address: davidehogan@arizona.edu.
J Hazard Mater ; 447: 130801, 2023 04 05.
Article en En | MEDLINE | ID: mdl-36689902
Identifying and exploiting cost-effective and green methods of metal recovery from natural and contaminated aqueous systems is widely recognized as necessary to supplement the supply of critical elements, decrease the environmental impacts associated with hardrock mining, and remediate metal-contaminated waters. This research examines a novel approach based on rhamnolipid-facilitated chemical precipitation of metals. Three techniques were assessed to remove the rhamnolipid:metal complex from solution: mixing only, and mixing following by filtration or centrifugation. Recent advances in the ability to synthetically produce rhamnolipid surfactants allowed investigation of a variety of rhamnolipid structures. Rhamnolipids differing in the length and number of hydrophobic tails were assessed to remove Pb, La, and Mg from single metal solutions. In general, removal increased with increased rhamnolipid hydrophobicity and with the addition of an active removal step (filtration or centrifugation). Filtration removed up to 96% of all metals while centrifugation removed up to 97% for Pb and La and 60% for Mg. Results suggest tailoring the rhamnolipid structure and removal methods may enable selective metal removal to achieve specific outcomes. Future studies in mixed-metal and real-world solutions will be needed to confirm the viability of these techniques in complex systems.
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Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Glucolípidos / Plomo Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Glucolípidos / Plomo Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2023 Tipo del documento: Article País de afiliación: Estados Unidos