non-extractable element
[nɑn ɪkˈstræktəbəl ˈɛləmənt]
nounpl: non-extractable elements
elemento não extraível
1. A chemical element or substance that cannot be removed or separated from a material, mixture, or matrix using standard extraction methods or solvents
The non-extractable element remained bound to the soil particles even after chemical treatment.
O elemento não extraível permaneceu ligado às partículas do solo mesmo após o tratamento químico.
2. In analytical chemistry and environmental science, a constituent that is not accessible to conventional extraction techniques and remains residual in the solid phase
Researchers found that heavy metals formed non-extractable elements in the contaminated sediment.
Os pesquisadores descobriram que os metais pesados formaram elementos não extraíveis no sedimento contaminado.
3. A component that is irreversibly bound or adsorbed to a substrate and cannot be recovered through standard laboratory procedures
The non-extractable element fraction accounted for 40% of the total pollutant mass.
A fração de elemento não extraível representava 40% da massa total do poluente.
This is primarily technical terminology used in environmental science, soil chemistry, and toxicology research. It is particularly relevant in Brazil and Portugal in studies related to soil contamination, industrial waste management, and agricultural soil quality assessment. The term reflects growing environmental awareness and regulatory attention to pollutant fate and bioavailability in both countries.
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