放射線照射したシリカ含有(水)酸化物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

結晶構造中にシリカ層を有する繊維状鉱物であるクリソタイルを添加した水溶液中の放射線誘起反応を研究した。5wt%の固相存在下の0.4M硫酸中の水素発生量は線の吸収線量に比例して増加し、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。また、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。

Interfacial reaction on chrysotile in acidic aqueous solutions which ispromoted by irradiation of Co -ray or electron beam was studied by analyzing the production of hydrogen gas and morphological alteration of fibril 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 measurementwith increasing the concentrations of sulfuric acid as 0.2M, 0.4M, 0.8M and 2.0M.