进口锯材溴甲烷熏蒸吸附影响因素研究

A Study on Influencing Factors of Methyl Bromide Fumigation and Adsorption of Imported Sawn Timber

本研究评价了投药剂量、木材含水率、装载率对锯材溴甲烷熏蒸吸附的影响。研究表明,由于锯材的吸附作用,溴甲烷浓度随熏蒸时间呈现规律性衰减趋势。投药剂量与熏蒸时间不存在交互效应,改变投药剂量不影响整体衰减走势,浓度衰减量可根据投药剂量的变化等比例放大或缩小。木材含水率和装载率对浓度变化影响显著,含水率和装载率越高,溴甲烷浓度衰减率越高,吸附量越大。针对不同因素水平下的浓度变化情况,本研究构建了熏蒸空间中溴甲烷浓度变化的模型,后续可为口岸大型原木熏蒸提供技术参考。

This research evaluated the effects of dosage,wood moisture content,and loading ratio on adsorption of methyl bromide.The data showed that the concentration of methyl bromide presented a regular decay trend with fumigation time due to the adsorption of sawn timber.There was no interaction effect between dose and fumigation time.The change of the dose did not affect the overall attenuation trend.The concentration attenuation could be proportionally enlarged or reduced according to the change of the dose.The wood moisture content and loading rate had a significant effect on the concentration change.The higher the wood moisture content and loading ratio,the higher the decay rate of methyl bromide concentration and the greater the adsorption capacity.Aiming at the concentration changes under different factor levels,this study developed a model for the change of methyl bromide concentration in the fumigation space.In the follow-up,it is expected to provide technical reference for the fumigation of large logs at the port.