表面活性剂强化空气扰动中气流与表面活性剂迁移行为  

Migration behaviors of airflow and surfactant in the surfactant-enhanced air sparging process

作　　者：姚猛 吕佳仪 陈旭阳 袁迁 薛金娟 王明新[1,2] YAO Meng;LYU Jiayi;CHEN Xuyang;YUAN Qian;XUE Jinjuan;WANG Mingxin(School of Environmental Science and Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Petrochemical Safety and Environmental Protection Engineering Research Center,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学环境科学与工程学院,江苏常州213164 [2]江苏石油化工安全与环保工程研究中心(常州大学),江苏常州213164

出　　处：《常州大学学报（自然科学版）》2024年第4期27-36,共10页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学基金青年科学基金项目(42207085);常州市科技计划资助项目(CJ20220160)。

摘　　要：研究通过光透射可视化和染色示踪技术,探究了砾石含水层表面活性剂强化空气扰动(SEAS)过程中气流与表面活性剂迁移行为。结果表明:在一定曝气流量范围内,相同曝气流量SEAS过程中的空气饱和度是空气扰动(AS)过程中的2.4倍以上。不同曝气流量SEAS过程中气流影响区域(ZOI)面积变化并不明显,ZOI呈现明显的锥形分布,且气体流量呈高斯分布。相同曝气流量,由于表面活性剂的稳泡及再分布作用,与AS过程相比,SEAS能够一定程度增加ZOI面积。此外,SEAS过程中表面活性剂的再分布,增大了其作用范围,但降低了目标区域表面活性剂浓度,增加了污染羽范围扩大的风险。上述研究有助于深入理解SEAS强化修复机制及提升挥发性有机污染物(VCOs)去除效率。Technologies of light transmission visualization and staining tracer were used to investigate the migration behavior of the airflow and surfactant during surfactant enhanced air sparging(SEAS)remediation in the gravel aquifer.Experimental results showed that the air saturation in SEAS was 2.4 times higher than that in AS when the air injection rate was the same within a certain air injection rate.Under different air injection rates,the zone of influence(ZOI)area did not significantly change,and the ZOI presented obvious conical shape,and the air flowrate presented Gaussian distribution.Under the same air injection rate,compared with AS process,the ZOI area slightly increased due to the foam stabilization effect and surfactant redistribution.In addition,the surfactant redistribution in SEAS process increased its action range,but reduced the surfactant concentration in the target zone,which increased the risk of pollution plume expansion.These studies are beneficial to in-depth understanding the enhanced remediation mechanism of SEAS and improving the VCOs removal efficiency.

关 键 词：表面活性剂 空气扰动 砾石含水层 气流 迁移行为 

分 类 号：X523[环境科学与工程—环境工程]