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Descripción
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| Mining and smelting activities join to fossil fuel combustion, agricultural practices, industrial activities or waste disposal are the main sources of metal pollutants is soils. When soil contamination was produced by heavy metal, impacts were increased because they are non-biodegradable and persistent compounds. In case of mining activities, the high metal content cause profound soil degradation through physical, chemical and biological transformations. Mining polluted soils are nutritionally poor habitats characterized by extreme pH values, low cation exchange capacity, low nutrient availability, and poor organic matter content. Traditionally, the remediation of these areas was not performed or involves destructive techniques such as soil excavation. However, there is an increasing interest in developing more environmental friendly techniques for soil remediation relying on in situ immobilization of the pollutants1. The main objective of this work is to study the combined effect of biochar and phytoextraction in the remediation of a mining polluted soil from Riotinto area (Spain). Selected soil shows low pH (3.86) and high Cu, Pb and Zn content. Biochars were prepared from pyrolysis at 600 and 450ºC of two different manure wastes and widely characterized (pH, surface area, cation exchange capacity). Selected soil was amended with 10%wt of four different biochars and incubated during 6 months. After this time, it was observed as the addition of biochars prepared at 450ºC significantly increases microbial biomass and CO2 emissions. Also, an important decrease in the mobilitiy of Cu, Cr, Zn and Ni was observed after addition of different biochars. Finally, Brassica napus was planted in soil amended with biochar and growth during 3 months. After this time, the metal content on soil and biomasswas analyzed in order to study the effect of biochar in the phytoextraction process. | |
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Internacional
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No |
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Nombre congreso
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14th International Phytotechnologies Conference |
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Tipo de participación
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960 |
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Lugar del congreso
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Montreal |
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Revisores
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Si |
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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25/09/2017 |
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Fecha fin congreso
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29/09/2017 |
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Título de las actas
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REMEDIATION OF SOIL FROM RIOTINTO MINING AREA (SPAIN) BY BIOCHAR ADDITION COMBINED WITH PHYTOEXTRACTION |