Kohji Kakimoto*, Yoshito Shirai**, Hiroaki Ogawa*, Masao Tomari*** and Yasuhiko Kato*

* Department of Applied Chemistry, Faculty of Engineering, Kyushu Institute of Technology.
** Department of Biochemical Engineering and Science, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology.
*** Consulting Engineer Office of Tomari

+ Correspondence should be addressed to Kohji Kakimoto:
(1-1 Sensuicho, Tobata-ku, Kitakyushu-city, Fukuoka 804-8550 Japan)

Abstract

Shredderdust is a residue from valuable ferrous metals found in auto-scrap and old electrical appliances, and is an industrial waste product which must be disposed of in regulated landfills. When Shredderdust was analyzed according to methods approved by the Environmental Agency, the eluted lead ion exceeded permissible amounts. In a dust particle experiment, the most eluted lead was extracted from medium size dust particles. In terms of type, the largest amount of eluted lead was taken from cotton waste dust. After washing the dust, the amount of eluted lead was fairly reduced. Furthermore, it was more effective to add alkaline carbonate in order to prevent the lead from eluting.

Key words: shredderdust, controlled waste, lead effluence