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Characterization and selection of biochar for an efficient retention of tricyclazole in a flooded alluvial paddy soil

AutorGarcía-Jaramillo, Manuel ; Cox, L. ; Knicker, Heike ; Cornejo, J. ; Spokas, K. A.; Hermosín, M.C.
Palabras claveFungicide
Specific surface area
Adsorption
13C NMR
Polarity index
Dissolved organic matter
Fecha de publicación2015
EditorElsevier
CitaciónJournal of Hazardous Materials 286: 581- 588 (2015)
Resumen© 2014 Elsevier B.V. Biochars, from different organic residues, are increasingly proposed as soil amendments for their agronomic and environmental benefits. A systematic detection method that correlates biochar properties to their abilities to adsorb organic compounds is still lacking. Seven biochars obtained after pyrolysis at different temperatures and from different feedstock (alperujo compost, rice hull, and woody debris), were characterized and tested to reveal potential remedial forms for pesticide capture in flooded soils. Biochar properties were determined by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy, specific surface area (SSA) assessment and scanning electron microscopy. In addition, dissolved organic matter (DOM) from these biochars was extracted and quantified in order to evaluate the effect on pesticide sorption. The biochars from alperujo compost presented very high affinity to the fungicide tricyclazole (55.9, 83.5, and 90.3% for B1, B4, and B5, respectively). This affinity was positively correlated with the pyrolysis temperature, the pH, the increased SSA of the biochars, and the enhanced aromaticity. Sorptive capacities were negatively related to DOM contents. The amendment with a mixture of compost and biochar endows the alluvial soil with high sorptive properties (from Kfads(soil)=9.26 to Kfads(mixture)=17.89) without impeding the slow release of tricyclazole.
Descripción8 páginas.-- 4 figuras.-- 6 tablas.-- 70 referencias.-- Appendix A. Supplementary data ( 1 figura)
Versión del editorhttp://dx.doi.org/10.1016/j.jhazmat.2014.10.052
URIhttp://hdl.handle.net/10261/115369
DOI10.1016/j.jhazmat.2014.10.052
Identificadoresdoi: 10.1016/j.jhazmat.2014.10.052
issn: 1873-3336
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