表面活性剂强化曝气二维模型试验系统研制及应用  

Development and application of 2D model test system for surfactant-enhanced air sparging

作　　者：刘松玉[1,2] 刘志彬[1,2] 毛柏杨 

机构地区：[1]东南大学岩土工程研究所,南京210096 [2]东南大学江苏省城市地下工程与环境安全重点实验室,南京210096

出　　处：《东南大学学报（自然科学版）》2016年第A01期82-87,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(41330641;41272311)

摘　　要：为了研究表面活性剂强化曝气法的强化修复机理,研制了表面活性剂强化曝气二维模型试验系统.该试验系统主要由模型槽、水箱、空压机、气压和流量控制箱、表面活性剂罐和数据记录装置(电脑)等组成.分别进行了表面活性剂预饱和曝气试验和表面活性剂强化曝气试验,以研究气相运动规律和MTBE去除效果.结果表明,当曝气压力超过进气压力后,进气流量随着曝气压力大致呈线性增长关系;当进气流量为0.5 L/min时,曝气影响范围较大,并且随着进气流量的继续增大,曝气影响范围小幅增长;表面活性剂强化曝气后,MTBE的分布范围较曝气前扩大,但区域间浓度的差异较曝气前缩小,曝气后MTBE的总平均浓度大幅降低.In order to study the mechanism of surfactant-enhanced air sparging （ SEAS）, a laborato- ry 2D model test system for SEAS is developed. The system is mainly composed of model box, wa- ter tank, air compressor, air pressure and flow control system, surfactant tank, and data recorder （PC）. A surfactant pre-saturated air sparging （AS） test and a SEAS test are conducted, respectively, to study the air flow behavior and MTBE removal effect. The results show that the air flow rate is increased linearly with the increase of air injection pressure when the air injection pressure exceeds the inlet pressure; when the air injection flow rate is 0.5 L/min, the influenced zone of AS is relatively large and will be increased limitedly with the air injection flow rate increasing; after SEAS, the distribution zone of MTBE gets larger, while the concentration of MTBE becomes more uniform, and the total average concentration of MTBE is significantly decreased.

关 键 词：地下水曝气 表面活性剂 室内模型试验 

分 类 号：TU449[建筑科学—岩土工程]