Data describing the composition of smoke are inherently multivariate and always non-negative parts of a whole. The data are relative and the information is contained in the ratios between parts of the composition. A prior analysis of smoke emissions produced from the burning of manzanita wood mixed with low-density polyethylene plastic applied traditional statistical methods to the compositional data and found no effect. The current paper applies compositional data techniques to these smoke emissions to determine if the prior analysis was accurate. Analysis of variance of the isometric log-ratios showed that LDPE significantly affected the CO₂ emission ratio for 8 of the 191 trace gases; this analysis showed none of the gases identified in the previous analysis were affected by LDPE. LDPE did not affect the CO₂ emission ratios for the alkanes, alkenes, alkynes, aldehydes, cycloalkanes, cycloalkenes, diolefins, ketones, MAHs, and PAHs. Compositional data analysis should be used to analyze smoke emissions data. Burning contaminant-free LDPE should produce emissions like wood.

Implications

Reanalysis of impact of burning LDPE plastic in silvicultural debris piles using appropriate statistical techniques confirmed previously published results from inappropriate techniques that LDPE did not change the composition of the smoke emissions. Being able to dispose of these LDPE-covered forest debris by burning can save thousands of dollars in labor costs annually. Disposal of pesticide-free agricultural LDPE plastic by burning should only produce wood-like smoke emissions. This applies to LDPE/total mass ratios of 0.25– 2.5% as studied.

中文翻译：

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低密度聚乙烯碎片堆产生的烟雾排放的成分数据分析。

描述烟雾成分的数据本质上是多元的，并且始终是整体的非负部分。数据是相对的，信息包含在组成部分之间的比率中。先前的分析是，燃烧曼萨尼塔木材与低密度聚乙烯塑料混合后产生的烟雾排放将传统的统计方法应用于成分数据，但没有发现任何影响。本文将成分数据技术应用于这些烟雾排放，以确定先前的分析是否准确。等距对数比的方差分析表明，LDPE显着影响了191种痕量气体中的8种的CO ₂排放比。该分析表明，先前分析中确定的气体均未受到LDPE的影响。LDPE不会影响CO烷烃，烯烃，炔烃，醛，环烷烃，环烯烃，二烯烃，酮，MAH和PAH的_2个发射比。应使用成分数据分析来分析烟雾排放数据。燃烧不含污染物的LDPE会产生像木头一样的排放物。

含义

使用适当的统计技术重新分析燃烧的LDPE塑料在造林碎屑堆中的影响，证实了先前发表的不当技术的结果，即LDPE不会改变烟雾排放的成分。能够通过燃烧处理这些被LDPE覆盖的森林碎片，每年可以节省数千美元的人工成本。通过燃烧处理无农药的农业LDPE塑料只能产生类似木屑的烟雾。这适用于研究的LDPE /总质量比0.25-2.5％。