Phosphine Residues Remaining in Aluminium Phosphide Preparations after Burial
نویسنده
چکیده
Recommended methods for disposal of aluminium phosphide may involve burial. A range of aluminium phosphide preparations used for fumigation consisting of partially spent, and unspent commercial phosphine (PH3) generating aluminium phosphide formulations (blankets and sachets, pellets, and tablets), was buried for 19 months. Phosphine produced by the formulations during this period was monitored at irregular intervals. After 19 months, samples of the buried material were retrieved. Analysis showed that material capable of generating PH3 was still present. The results indicate that burial can reduce the amount of aluminium phosphide capable of generating PH3 to 0.6-4.1% of the original quantity, which is similar to that found in fully spent formulations after fumigation exposures.
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