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Influence of moisture content on NO2 sorption ability of cedar wood
Journal of Wood Science ( IF 2.9 ) Pub Date : 2021-05-03 , DOI: 10.1186/s10086-021-01961-z
Miyuki Nakagawa , Shuichi Kawai , Kozo Kanayama , Kenji Umemura

This study examined the influence of moisture content (MC) on NO2 sorption ability of cedar (Cryptomeria japonica) wood using the specimens with different MCs. Four MC conditions were applied, namely 0%, 8.6%, 12.7% and 16.5%, based on the differences of bonding condition of water molecule in the wood substances. As a result, the NO2 sorption volume increased drastically due to the presence of water, and as the MC increased, the NO2 sorption volume increased slightly. The NO generation volume and nitric acid concentration in the specimens were evaluated after an aeration test, and it was strongly indicated that the NO2 reacted with water in the specimen, and that the NO generation volume increased as the content of multilayer adsorbed water increased. The nitric acid seemed to be formed by the reaction between NO2 and water, and it was then held in the specimen. Based on the NO2 sorption volume calculated using the NO generation volume, it was shown that the NO2 sorption after 12-h aeration was caused mainly by the reaction between NO2 and water. Furthermore, the presence of both water and extractives contributed to the NO2 sorption in the initial period, and the presence of water contributed greatly to the NO2 sorption over the long term.

中文翻译:

水分含量对雪松木NO 2吸附能力的影响

这项研究使用不同的MC样品检验了水分含量(MC)对雪松(Cryptomeria japonica)木材NO2吸附能力的影响。根据木材中水分子键合条件的差异,采用了四种MC条件,分别为0%,8.6%,12.7%和16.5%。结果,由于水的存在,NO 2吸附量急剧增加,并且随着MC的增加,NO 2吸附量略有增加。曝气试验后,对试样中的NO产生量和硝酸浓度进行了评价,强烈地表明NO 2与试样中的水反应,并且随着多层吸附水含量的增加,NO产生量增加。硝酸似乎是由NO2与水之间的反应形成的,然后将其保存在样本中。基于使用NO产生量计算出的NO 2吸附量,表明12小时通气后的NO 2吸附主要由NO 2与水之间的反应引起。此外,水和萃取物的存在在初期都有助于NO2的吸收,而水的存在则从长远来看极大地促进了NO2的吸收。
更新日期:2021-05-03
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