Department of Occupational Hygiene, School of Health Sciences, University of Occupational and Environmental Health, Japan.
J UOEH. 2021;43(3):335-340. doi: 10.7888/juoeh.43.335.
We investigated the adsorbed amount of organic solvent vapors and adsorption rate of a new porous carbon material made from rice husk (rice husk activated carbon) in comparison with those of coconut shell activated carbon by the breakthrough curve. The adsorbed amount on the rice husk activated carbon and that on the coconut shell activated carbon were 81.3 ± 3.3 mg/g and 71.7 ± 5.0 mg/g for acetone, 8.0 ± 1.7 mg/g and 6.3 ± 0.2 mg/g for methanol, 196.8 ± 8.8 mg/g and 262.8 ± 10.4 mg/g for ethyl acetate, 234.8 ± 11.9 mg/g, and 364.6 ± 43.8 mg/g for toluene, respectively. These results suggest that the amount of organic solvent vapors adsorbed per unit weight of rice husk activated carbon is slightly larger for high polar compounds and is smaller for low polar compounds than that of coconut shell activated carbon. We compared the adsorption rate of the two materials by using the slope of the breakthrough curves. Even though there are some limitations to the characteristics of the new porous carbon material, it may be possible to use rice husk activated carbon as an alternative to coconut shell activated carbon in occupational and environmental measures.
我们通过穿透曲线研究了一种由稻壳制成的新型多孔碳材料（稻壳活性炭）与椰子壳活性炭相比吸附有机溶剂蒸气的量和吸附速率。稻壳活性炭的吸附量和椰子壳活性炭的吸附量分别为丙酮 81.3±3.3mg/g 和 71.7±5.0mg/g、甲醇 8.0±1.7mg/g 和 6.3±0.2mg/g、乙酸乙酯 196.8±8.8mg/g 和 262.8±10.4mg/g、甲苯 234.8±11.9mg/g 和 364.6±43.8mg/g。这些结果表明，每单位重量的稻壳活性炭吸附的有机溶剂蒸气量对于高极性化合物略大，对于低极性化合物则小于椰子壳活性炭。我们通过穿透曲线的斜率比较了两种材料的吸附速率。尽管新型多孔碳材料的特性存在一些局限性，但在职业和环境措施中，稻壳活性炭可能可以替代椰子壳活性炭。
