Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 1 de 1
Filter
Add more filters











Database
Language
Publication year range
1.
Environ Geochem Health ; 32(5): 391-9, 2010 Oct.
Article in English | MEDLINE | ID: mdl-20033757

ABSTRACT

A serial batch leaching experiment has been carried out to evaluate the release of elements from the ash of Pinus halepensis needles burned under two test conditions-with and without treatment of the forest species with the carbonate minerals (huntite and hydromagnesite) in aqueous solution (pH 6). The ash (before and after leaching) and leachates were analyzed using atomic absorption spectroscopy and X-ray diffraction. Compared with data from samples treated with the commercially available, phosphate-based fire retardant diammonium phosphate (DAP), we found that use of huntite or hydromagnesite was much more successful in obstructing the release of the toxic elements present in the ash, probably because of the alkaline conditions resulting from decomposition of the minerals during burning. In contrast, DAP tended to be more able to facilitate the extraction of some toxic metals (e.g., Zn, Cu, Mn), probably because of the acidic conditions resulting from its decomposition to phosphoric acid. Data from this study thus lend strong support to the use of magnesium carbonate minerals as new wildfire retardants, because they were shown to be more friendly to the environment (e.g., soil, ground, and underground water streams) than those currently in use (e.g., phosphate or sulfate salt type).


Subject(s)
Fires , Flame Retardants/analysis , Magnesium/analysis , Soil Pollutants/analysis , Water Pollutants, Chemical/analysis , Carbon , Coal Ash , Environmental Monitoring , Flame Retardants/toxicity , Hydrogen-Ion Concentration , Magnesium/chemistry , Magnesium/toxicity , Metals/chemistry , Metals/isolation & purification , Minerals/chemistry , Minerals/isolation & purification , Particulate Matter , Phosphates/analysis , Phosphates/chemistry , Phosphates/toxicity , Phosphoric Acids/analysis , Phosphoric Acids/chemistry , Phosphoric Acids/toxicity , Pinus , Soil Pollutants/chemistry , Soil Pollutants/toxicity , Solubility , Spectrophotometry, Atomic , Water Pollutants, Chemical/toxicity , X-Ray Diffraction
SELECTION OF CITATIONS
SEARCH DETAIL