Application of a biosorbent to soil: a potential method for controlling water pollution by pesticides

  1. Álvarez-Martín, A. 1
  2. Rodríguez-Cruz, M.S. 1
  3. Andrades, M.S. 2
  4. Sánchez-Martín, M.J. 1
  1. 1 Instituto de Recursos Naturales y Agrobiología de Salamanca
    info

    Instituto de Recursos Naturales y Agrobiología de Salamanca

    Salamanca, España

    ROR https://ror.org/051p0fy59

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Revista:
Environmental Science and Pollution Research

ISSN: 0944-1344

Año de publicación: 2016

Volumen: 23

Número: 9

Páginas: 9192-9203

Tipo: Artículo

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DOI: 10.1007/S11356-016-6132-4 SCOPUS: 2-s2.0-84956660200 WoS: WOS:000375412600097 GOOGLE SCHOLAR

Otras publicaciones en: Environmental Science and Pollution Research

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Resumen

Different strategies are now being optimized to prevent water from agricultural areas being contaminated by pesticides. The aim of this work was to optimize the adsorption of non-polar (tebuconazole, triadimenol) and polar (cymoxanil, pirimicarb) pesticides by soils after applying the biosorbent spent mushroom substrate (SMS) at different rates. The adsorption isotherms of pesticides by three soils and SMS-amended soils were obtained and the adsorption constants were calculated. The distribution coefficients (Kd) increased 1.40–23.1 times (tebuconazole), 1.08–23.7 times (triadimenol), 1.31–42.1 times (cymoxanil), and 0.55–23.8 times (pirimicarb) for soils amended with biosorbent at rates between 2 and 75 %. Increasing the SMS rates led to a constant increase in adsorption efficiency for non-polar pesticides but not for polar pesticides, due to the increase in the organic carbon (OC) content of soils as indicated by KOC values. The OC content of SMS-amended soils accounted for more than 90 % of the adsorption variability of non-polar pesticides, but it accounted for only 56.3 % for polar pesticides. The estimated adsorption of SMS-amended soils determined from the individual adsorption of soils and SMS was more consistent with real experimental values for non-polar pesticides than for polar pesticides. The results revealed the use of SMS as a tool to optimize pesticide adsorption by soils in dealing with specific contamination problems involving these compounds. © 2016, Springer-Verlag Berlin Heidelberg.