Reducing Phosphine Usage and Atmospheric Emission during Insect Control Process in Tobacco Storage
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摘要: 为了减少烟草仓贮害虫防治过程中磷化氢的使用量和向大气的直接排放量，考察了不同清洁隔离措施对仓内虫口数量的影响，开展了不同温度条件下低剂量磷化铝熏蒸试验及熏蒸余气磷化氢的化学吸收处理试验。结果发现：1)隔离仓间内的虫口数量远低于普通仓间；2)在夏季较高温度条件下，磷化铝熏蒸的用药量可以由常规的6.0 g/m3 左右降低至4.0 g/m3 左右；3)饱和漂粉精溶液能有效吸收磷化氢，但在大规模试验中难以实现一次性的彻底净化。研究表明，减少磷化氢的使用量和排放量，应当从加强清洁隔离、适当降低磷化铝熏蒸的单位体积用药量、对熏蒸余气进行净化处理等三个方面采取综合措施。Abstract: In order to reduce the usage and the direct emission of phosphine into the atmosphere during insect control process in tobacco storage, we investigated the effect of different cleaning and isolate measures on insect population, and conducted an experiment on low-dose aluminium phosphide fumigation at different temperatures and the chemical absorption experiment of phosphine. The results showed that the insect population in isolated warehouses was lower than that in the ordinary warehouses, and at high temperature in summer, the conventional aluminium phosphide unit dosage 6.0 g/m3 could be reduced to about 4.0g/m3; while the saturated calcium oxychloride solution proved moderately effective in reducing phosphine, although not completely. We suggest that comprehensive consideration is necessary in reducing the usage and the direct release of phosphine into the atmosphere, with the measures of warehouse sanitation, fumigation with low fumigant unit dosage and phosphine decontamination after fumigation.
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Keywords:
- insect /
- sanitation /
- phosphine (PH3) /
- fumigation
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