放射線照射したクリソタイルの形態変化と溶液内の反応促進に関する研究

Promoted reaction of hydrogen gas generation and deformed morphology of chrysotile in aqueous solutions under irradiation

青柳 登   ; 永石 隆二 ; 江坂 文孝  ; 山田 禮司

Aoyagi, Noboru; Nagaishi, Ryuji; Esaka, Fumitaka; Yamada, Reiji

代表的アスベストの1つであるクリソタイルの針状構造破砕に放射線を用いた。照射による形態変化は硫酸濃度を高くすると促進され、繊維状の構造が微粒子状に変わることがわかった。また、5wt%の固相存在下の水溶液中の水素発生量は線の吸収線量に比例して増加し、同じ重量のアルミナやシリカなどの酸化物微粒子存在下の発生量よりも多いことがわかった。

Interfacial reaction on chrysotile in acidic aqueous solutions which is promoted by irradiation of Co -ray or electron beam was studied by analyzing the production of hydrogen gas and morphological alteration offibril structure. The amount of generated hydrogen gas was proportional to the dose of irradiation and larger than the other particles such as alumina or silica known as a reactive surface donor for radicals. An expedited reaction in which chrysotile fibrous structure fell apart and come into particles was found more in SEM-EDX measurement with increasing the concentrations of sulfuric acid as 0.2M, 0.4M, 0.8M and 2.0M.