原位注射修复氨氮污染地下水的应用研究  

Application Research on In-situ Injection Remediation of Ammonia-Nitrogen Contaminated Groundwater

作　　者：周冲 柯瑞 罗舒元 ZHOU Chong;KE Rui;LUO Shuyuan(Geophysical Exploration Brigade of Hubei Geological Bureau,Wuhan Hubei 430100,China;Gad Environmental Technology Co.,ltd.,Shenzhen Guangzhou 518000,China;Wuhan Hongde Ruoshui Engineering Consulting Co.,Ltd.Wuhan Hubei 430100,China)

机构地区：[1]湖北省地质局地球物理勘探大队,湖北武汉430100 [2]中兰环保科技股份有限公司,广东深圳518000 [3]武汉弘德若水工程咨询有限公司,湖北武汉430100

出　　处：《新疆环境保护》2024年第3期29-34,共6页XINJIANG ENVIRONMENTAL PROTECTION

摘　　要：目前,高浓度氨氮污染地下水的修复技术主要采用抽出-处置-回灌的原地异位处置技术,该技术成本高,不利于节碳和绿色修复等环保目标。本文研究一种高浓度氨氮污染地下水原位化学修复处置技术,通过小试实验选定了修复药剂及配比,在化工场地污染最严重区域选择1 000 m^(2)进行了中试实验,确定了最优工艺技术参数(注射井、注射流量、压力和时间):分别为注射量在1.5~2 m^(3),注射时间8~15 min,注射压力0.8~1.2 Mpa。研究结果表明:通过原位注射化学修复处置技术,实验区地下水中的氨氮值降低到修复目标值以下,未出现拖尾现象。地下水原位化学修复处置技术在经济层面优于原地异位处置技术,同时,此技术不仅适用于氨氮污染的地下水,也可运用于重金属及有机物污染的地下水。At present,the remediation technology for high concentration ammonia nitrogen contaminated groundwater mainly adopts the in-situ ectopic disposal technology of extraction,disposal and reinjection,which was costly and not conducive to environmental goals such as carbon conservation and green remediation.In this paper,an in-situ chemical remediation and disposal technology for high concentration ammonia nitrogen contaminated groundwater was studied.Remediation agents and ratios were selected through small-scale experiments,and a pilot experiment was carried out in 1000 m^(2) of the most polluted area of the chemical site.The optimal process parameters(injection well,injection flow rate,pressure and time)were determined as follows:injection volume was 1.5~2 m^(3),injection time was 8~15 min,and injection pressure was 0.8~1.2 Mpa.The results indicated that through in-situ injection chemical remediation and disposal technology,the ammonia nitrogen value in the groundwater of the experimental area was reduced to below the remediation target value without any tailing phenomenon.The in-situ chemical remediation and disposal technology for groundwater was more economical than the in-situ ectopic disposal technology.At the same time,this technology was not only suitable for groundwater contaminated with ammonia nitrogen,but also for groundwater polluted by heavy metals and organic matter.

关 键 词：氨氮污染 原位注射 地下水 化工场地 原位修复 

分 类 号：X523[环境科学与工程—环境工程]