Uso de nanopartículas de óxidos de hierro e hidroxiapatita para reducir la disponibilidad de elementos potencialmente tóxicos en gossans de la mina de São Domingos

  1. Daniel Arenas-Lago 1
  2. Manoel Lago-Vila 1
  3. Andrés Rodríguez-Seijo 1
  4. María Manuela Abreu 2
  5. María Luisa Andrade 1
  6. Flora Alonso Vega 1
  1. 1 Universidade de Vigo
    info

    Universidade de Vigo

    Vigo, España

    ROR https://ror.org/05rdf8595

  2. 2 Universidade de Lisboa
    info

    Universidade de Lisboa

    Lisboa, Portugal

    ROR https://ror.org/01c27hj86

Book:
Solos e Água, fontes (esgotáveis) de vida e de desenvolvimento Livro de atas: VII Congresso Ibérico das Ciências do Solo (CICS 2016) VI Congresso Nacional de Rega e Drenagem, 13-15 de Setembro de 2016, Instituto Politécnico de Beja, Beja

Publisher: Sociedade Portuguesa da Ciência do Solo (SPCS)

ISBN: 978-989-99665-0-5

Year of publication: 2016

Pages: 107-110

Type: Book chapter

DIALNET GOOGLE SCHOLAR

Abstract

Metal mining, especially the exploitation of metal sulphide deposits, is one of the activities that cause major pollu- tion problems in the environment, due to the solubilisation of high levels of potentially hazardous elements (PHEs). Iron oxides and hydroxyapatite nanoparticles can be used as high efficiency modifiers to improve soil quality by immobilizing PHEs. In this study was evaluated the efficacy of hydroxyapatite (HAnp), hematite (HMnp) and maghemite (Mnp) nanoparticles to immobilise available As, Pb and Sb. For this, selective extractions were performed with 0.01M CaCl2, a mixture of low molecular weight organic acids andultrapure H2O in gossans from the abandoned mine of São Domingos. Gossans were treated with the different nanoparticles, checking that, operationally defined as, As, Pb and Sb available content decreased, regardless of extractant used. It was verified EPTs retention by nanoparticles using HR-TEM / EDS. With this technique was observed the formation of associ- ations between nanoparticles and the studied elements, which reduced their availability.

Data source: Dialnet