J. Technology and Education, Vol.25, No.1, pp.7-11 (2018)

研究論文

紐状干瓢製品の示すメチレンブルー吸着特性

 

小林 稜¹，松本 将弥¹，高原 美規²，田中 孝国¹*

小山工業高等専門学校　物質工学科 (〒323-0806 小山市中久喜771)

*tanakatakakuni@oyama-ct.ac.jp

長岡技術科学大学 生物機能工学専攻 (〒940-2188 新潟県長岡市上富岡町1603-1)

 

The methylene blue adsorption properties by kanpyo product

 

Ryo Kobayashi¹，Masaya Matsumoto¹，Yoshinori Takahara², Takakuni TANAKA¹*

¹National Institute of Technology, Oyama College

(771 Nakakuki, Oyama, Tochigi 323-0806, JAPAN)

²Nagaoka University of Technology, Department of Bioengineering

(1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, JAPAN)

 

(Received February, 28, 2018; Accepted April 2, 2018)

 

The structure of kanpyo includes a lot of fiber (it contains 95% water) and has a porous structure after drying. It shows good adsorption. However, the utilization of kanpyo still remains limited. To increase consumption, we consider a new utilization of kanpyo. Accordingly, we evaluated the potential of kanpyo for the adsorption of methylene blue (MB) from aqueous solution. This study was conducted to determine the time necessary for equilibrium. Rapid equilibrium and adsorption is an indication of the capacity of a material as an adsorbent. Next, we examined the effect of contact time on the adsorption capacity of MB onto kanpyo at different initial MB concentrations. The Langmuir model was used as the adsorption isotherm in this study. The experiment’s data fit well with the Langmuir model for the adsorption of MB to kanpyo. The maximum adsorption capacity at 22℃ was found to be 454.4 mg/L for MB onto kanpyo by the Langmuir isotherm. The Langmuir isotherm also suggests that the adsorption of MB onto kanpyo is chemisorption. The results indicated that kanpyo could be an alternative product to the costly adsorbents used for MB removal.

 

Key words: dried gourd / absorption / methylene blue