Characterization of carbofuran bound residues and the effect of ageing on their distribution and bioavailability in the soil of a sugar beet field in north-western Morocco
| Autor: | Amina Azmani, Rachid Mrabet, M. Benicha |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0211 other engineering and technologies
02 engineering and technology Fractionation extractability 010501 environmental sciences Management Monitoring Policy and Law complex mixtures 01 natural sciences carbofuran chemistry.chemical_compound lcsh:QH540-549.5 Humic acid 14C-technique 0105 earth and related environmental sciences Nature and Landscape Conservation chemistry.chemical_classification 021110 strategic defence & security studies Ecology biology Chemistry aging Mineralization (soil science) biology.organism_classification Pollution Bioavailability Environmental chemistry Soil water Humin Sugar beet lcsh:Ecology soil organic matter fractionation Carbofuran bound residues |
| Zdroj: | European Journal of Environmental Sciences, Vol 6, Iss 1, Pp 57-63 (2016) |
| ISSN: | 2336-1964 1805-0174 |
| Popis: | This study was undertaken to investigate distribution, fractionation, bioavailability and remobilization characteristics of bound soil-aged carbofuran and the effect of ageing in clay soil in a typical field of sugar beet at Loukkos in northwest Morocco. Results indicate that initially there were high levels of bound residues (BR) in the humin fraction, which decreased with incubation time and ageing of the BR. While in the fulvic and humic acid fractions, the amount of BR increased with the ageing of the BR and occurred predominantly (60%) in the fulvic acid fraction. The possibility of the mineralization and release of BR with ageing was studied using fresh soil and an incubation period of 90 days. The results indicate that the ageing of the residues have a great influence on the remobilization and mineralization rates of carbofuran BR; 9.45 to 14.90% of the total BR was released as extractable residues, and 1.95 to 4.15% was mineralized depending on the age of the residues in soil and the soil-aged carbofuran BR. The incorporation of the residues in the humin fraction is considered to be a threat to the environment. On the other hand, the clear prevalence of residues in the fulvic and humic acid fractions, may have an important effect on their bioavailability and movement in soil. Moreover, the re-extractability of BR could pose a potential environmental risk. Consequently, the BR remobilized must be taken into account when assessing for registration processes the environmental risk of pesticides persisting in soils. |
| Databáze: | OpenAIRE |
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