Effects of fresh and field-aged holm-oak biochar on As, Cd and Pb bioaccumulation in different rice growing environments

Arsenic, Cd, and Pb environmental fate is influenced when the traditional permanent flooding rice production systems are replaced by water-saving and soil conservation practices, urging for additional strategies that avoid their bioaccumulation in rice grain. The aim of this two-years field study wa...

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Published in:The Science of the total environment 2023-08, Vol.887, p.164012-164012, Article 164012
Main Authors: Martín-Franco, Carmen, Sánchez, Jaime Terrón, Alvarenga, Paula, Peña, David, Fernández-Rodríguez, Damián, Vicente, Luis Andrés, Albarrán, Ángel, López-Piñeiro, Antonio
Format: Article
Language:English
Subjects:
arsenic
bioaccumulation
biochar
conventional tillage
direct seeding
environment
environmental fate
Flooding irrigation
food safety
Mediterranean environment
Oryza sativa L
pyrolysis
Quercus ilex
rice
risk reduction
Soil amendments
soil conservation
Sprinkler irrigation
Toxic trace elements
water conservation
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Summary:Arsenic, Cd, and Pb environmental fate is influenced when the traditional permanent flooding rice production systems are replaced by water-saving and soil conservation practices, urging for additional strategies that avoid their bioaccumulation in rice grain. The aim of this two-years field study was to evaluate the effects of fresh and field-aged biochar on As, Cd, and Pb bioaccumulation, and on As speciation, in rice grain produced in different growing environments (flooding versus sprinkler and conventional tillage versus direct seeding). Biochar produced from holm-oak pruning residues (pyrolysis at 550 °C, 48 h), in a single application (28 Mg ha−1), reduced As bioaccumulation in rice grain in the permanent flooding system to non-quantifiable concentrations (e.g., from 0.178 mg kg−1 to
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2023.164012