Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 23, Issue 14, Pages 14676-14685Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-016-6959-8
Keywords
Adsorption; By-products; Desorption; Fluoride; Soils; Wastes
Categories
Funding
- Ministerio de Economia y Competitividad (Government of Spain) [CGL2012-36805-C02-01, CGL2012-36805-C02-02]
- European Regional Development Fund (ERDF) (FEDER in Spain)
- Juan de la Cierva post-doctoral contract [JCI-2012-11778]
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We used batch-type experiments to study F sorption/desorption on a forest soil, a vineyard soil, pyritic material, granitic material, finely and coarsely ground mussel shell, mussel shell calcination ash, oak wood ash, pine-sawdust, slate processing fines, and three different mixtures that included three components: sewage sludge, mussel shell ash, and calcined mussel shell or pine wood ash. The three waste mixtures, forest soil, pyritic material, and shell ash showed high sorption capacity (73-91 % of added F) and low desorption, even when 100 mg F L-1 was added. All these materials (and to a lower extent wood ash) could be useful to remove F from polluted media (as certain soils, dumping sites, and contaminated waters). The vineyard soil, the granitic material, mussel shell, slate fines, and pine-sawdust were less effective in F removal. In most cases, sorption data fitted better to the Freundlich than to the Langmuir equation. These results can be useful to program the correct management of the soils, by-products, and waste materials assayed, mostly in situations where F concentrations are excessive and F removal should be promoted.
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