摘要
利用三维模拟槽研究了地下水曝气技术（AS）使用过程中,含水层介质粒径、曝气压力与影响半径（ROI）、气体流量、气流流型之间的关系.结果表明：曝气过程中ROI随曝气压力的上升而增大;气流质量流量随曝气压力的增加而增大,压力较大时二者呈线性关系;气流流型由介质粒径决定,与曝气压力无关.介质粒径为1～2mm时气流呈倒圆锥形,介质粒径为4～8mm时气流呈抛物线形.
This paper presented the results of a series of laboratory studies on air sparging （AS） within a three-dimensional aquifer simulation tank. The study investigated the effects of particle size and air injection pressure on influence radius （ROI）, gas flow rate and patterns during air sparging. The test results showed that improving injection pressure could increase ROI during AS. Air mass flow rate increased linearly with the increase of injection pressure after exceeding a certain sparging pressure. The air flow patterns were determined by the sizes of porous media regardless of the injection pressure. The shape of air flow was conical when particle size was 1-2mm, and parabolic when particle size was 4-8mm.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2014年第11期2813-2816,共4页
China Environmental Science
基金
国家自然科学基金资助项目(41272256)
北京市教育委员会市属高校创新能力提升计划项目(TJSHG201310772028)
吉林大学研究生创新基金资助项目(2014098)
关键词
地下水曝气
三维模型
影响半径
气流流型
air sparging
three-dimensional model
radius of influence
gas flow patterns
