J. Technology and Education, Vol.23, No.2, pp.51-56 (2016)

研究論文

土壌中の鉛を比色法によって簡易的に検出するデバイスの開発と

RGB値で色度を評価することによる検出限界の改善

 

庄司良*¹，徳永晶子¹，鈴木美華¹，坂本達宣²，高木泰憲²，深浦仁美²，若杉玲子³

¹ 東京工業高等専門学校　物質工学科　(〒193-0997　八王子市椚田町1220-2)

² 有限会社　坂本石灰工業所　（〒865-0013　玉名市下273-1）

³ 熊本高等専門学校　生物化学システム工学科　（〒866-8501　八代市平山新町2627）

*shoji@tokyo-ct.ac.jp

 

Development of a device to easily detect lead pollution in the soil

by a colorimetric method and the improving the detection limitation

by using RGB(red-green-blue) values

 

Ryo SHOJI^1*, Akiko TOKUNAGA¹, Mika SUZUKI¹, Tatsunobu SAKAMOTO², Yasunori TAKAKI², Hitomi FUKAURA² and Reiko WAKASUGI³

¹ National Institute of Technology, Tokyo College (1220-2 Kunugida, Hachioji, Tokyo 193-0997 Japan)

² Sakamoto Lime Industry Co., Ltd. (273-1 Shimo, Tamana, Kumamoto 865-0013 Japan)

³ National Institute of Technology, Kumamoto College (2627 Hirayamashinmachi, Yatsushiro,

Kumamoto 866-8501 Japan)

 

Received January 25, 2016; Accepted August 26, 2016)

 

Abstract

In Japan, soil pollution by heavy metals has been one of the most serious environmental problems. Some studies have shown that conventional methods of detecting metal pollution in soil show promising sensitivity. However, the methods are not easily employed for on-site evaluation, requiring much time and cost. In this study focusing on colorimetric method, we have successfully developed an easily used and handy device for the evaluation of lead pollution in soil. In addition, the detection limitations can be improved using RGB values as the quantitative evaluation for colorization induced by lead pollution. The device developed in this study was applied to four simulated soils contaminated by lead. Although the device can detect lead pollution in real contaminated soils, the color induced by lead-binding was dependent on the size of the soil particles.

 

Key words : Lead / soil / easy / RGB / size distribution