摘要
为了解决２种溶液在混合前温度不易相等的问题而设计的双温度计法，可以快速测定２种溶液混合前后温度差值，并将这一新方法用于衡量锰、铝、铁水合氧化物在吸附溶液硼时所产生的热效应。结果表明，锰、铝、铁的水合氧化物对硼的吸附均有不同程度的热效应。供试样品与硼发生吸附反应所引起的热效应造成温度随时间变化的情况与通常的雷诺曲线相同，而水合氧化物悬浮液以及吸附质溶液的稀释与吸附反应相比较，其热效应小得多。使用这种双温度计法就可实现在通常条件下测定诸如吸附反应这类热效应引起的温度变化，从而为进一步研究吸附热提供了简单易行的量热方法。
In order to measure the adsorption heat
effect of boric acid by hydrous oxides of Mn, Al, and Fe in aqueous solutions, a new
two-thermometer method was adopted. The temperature difference between before and after
mixture of adsorbent and adsorbate could be measured. The results showed that there were
remarkble differences in thermal effects in adsorption of hydrous oxides of Mn, Al, and Fe with
boron. The temperaturetime curves of adsorption heat of hydrous oxides to boric acid were
agreeable to the Reynolds'curve, while temperature difference of dilution heat effect of the
adsorbents or the adsorbate was much smaller than that of the adsorption heat effect. Hence,
the two-thermometer method can be used to measure temperature change resulted from
adsorption heat effect in normal condition. And it is an easy and convenient method of
measuring adsorption heat effect.\;
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1999年第2期143-146,共4页
Journal of Huazhong Agricultural University
基金
国家自然科学基金
关键词
双温度计法
吸附热效应
水合氧化物
硼
土壤
two-thermometer method, adsorption heat effect,
hydrous oxides, boron
