以玉米秆为碳源原位修复地下水硝酸盐研究  

In-Situ Biological Denitrification Using Maize Stalks as Carbon Source for Nitrate-Groundwater Remediation

作　　者：李同燕 李文奇[2] 胡伟武[1,3] 冯传平[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,100083 [2]中国水利水电科学研究院,100044 [3]中国地质大学(北京)期刊中心,北京100083

出　　处：《水处理技术》2016年第2期34-40,共7页Technology of Water Treatment

基　　金：国家科技支撑计划项目(2012BAJ25B00)

摘　　要：研究了以经氢氧化钠预处理的玉米秆作为反硝化碳源的地下水原位模拟实验中硝酸盐的去除效果。结果表明,在原位净化模拟静态实验中,经氢氧化钠预处理的玉米秆作为可渗透反应墙(PRB)介质时,NO_3^--N和TN的去除率分别达到了81.9%和76.1%。原位净化模拟动态实验中,反硝化效果随着HRT的增加而增加。当HRT为15 d时,NO_3^--N和TN的去除率分别达到了99.5%和97.0%,且出水中没有NO_2^--N和NH_4^+-N的积累。经氢氧化钠预处理的玉米秆,可以作为地下水原位净化修复的固相碳源。Denitrification performance in in-situ nitrate-contaminated groundwater remediation using maize stalks pretreated by NaOH as carbon source were investigated under static and dynamic conditions.The results demonstrated,in the in-situ static experiment,the NO_3^--N and TN removal efficiencies were 81.9%and 76.1%,respectively.In the in-situ dynamic experiments,nitrate removal efficiency,nitrite and ammonium accumulation in the treated water were investigated under various HRT（5,10 and 15 d）.Results showed that removal efficiency increased with the increase in HRT.NO_3^--N and TN removal efficiencies reached 99.5%and 97.0%,respectively,and NO_2^--N and NH4＋-N accumulation was observed at the optimum HRT of 15 d.That maize stalks pretreated by NaOH could be used as solid carbon sources in in-situ nitrate-contaminated groundwater remediation.

关 键 词：预处理 玉米秆 原位修复 地下水 反硝化 

分 类 号：X523[环境科学与工程—环境工程]