日本地球惑星科学連合2018年大会

講演情報

[EE] ポスター発表

セッション記号 A (大気水圏科学) » A-GE 地質環境・土壌環境

[A-GE31] 地質媒体における物質移動,物質循環と環境評価

2018年5月21日(月) 10:45 〜 12:15 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:小島 悠揮(岐阜大学工学部)、濱本 昌一郎(東京大学大学院農学生命科学研究科)、斎藤 広隆(東京農工大学大学院農学研究院、共同)、森 也寸志(岡山大学大学院環境生命科学研究科)

[AGE31-P10] 気泡数密度およびイオン強度が飽和多孔質内のナノバブル挙動に与える影響

江尻 哲英1、*濱本 昌一郎1ダン トゥエット1二瓶 直登1西村 拓1 (1.東京大学大学院農学生命科学研究科)

キーワード:ナノバブル、輸送、多孔質体、イオン強度、気泡数密度

An understanding of nano-scale bubble (NB) transport in porous media is important for potential application of NBs in soil/groundwater remediation. It is expected that the physical properties and solution chemistry of NB water highly influences the surface characteristics of NBs and porous media and the interaction between them, thus affecting the transport characteristics of NB. In this study, one-dimensional column transport experiments using glass beads were conducted, where air-NBs water were injected to the column. The turbidity, pH, EC, DO, and bubble size distribution in the effluent were measured. Effects of bubble concentration and ionic strength on the NBs transport were investigated based on the column experiments. The results showed that relative turbidities (measured turbidity in the effluents / turbidity in the applied NBs water) during the NBs water injection were lower for NBs water at lower bubble concentration. In addition, with increasing ionic strength in NBs water, lower relative turbidities in the effluents were observed, suggesting reduced repulsive force between NBs and glass beads surface. For NBs water at the same ionic strength, NBs water containing Na+ showed higher NBs mobility as compared to one containing Ca2+. Thus, ion species also influenced NBs transport characteristics.