碳源类型对地下水硝酸盐污染生物修复效果的影响研究

Study on the effect of carbon source types on the remediation of nitrate pollution in groundwater

为研究碳源类型对地下水硝酸盐污染原位修复效果的影响,本文构建了室内柱试验模型,围绕乙醇、棉花、餐盒三种不同碳源,设计了四组试验方案。试验结果表明,液态碳源乙醇对硝酸盐氮的去除率最高,达到了97%以上,其次是棉花均匀布设时,平均去除率81.04%,烯烃类餐盒的去除率仅为60%,且硝酸盐氮的去除率与固态碳源的分布形式有关,乙醇单位质量的去除率约是棉花的21倍。液态碳源乙醇的修复效果明显优于固态碳源。

In order to study the effect of carbon source types on in-situ remediation of nitrate pollution in groundwater,an indoor column test model was constructed in this paper,four groups of test schemes were designed around three different carbon sources of ethanol and cotton meal boxes.The experimental results showed that the removal rate of nitrate nitrogen by liquid carbon source ethanol was the highest,reaching more than 97%,followed by the average removal rate of 81.04% when cotton was evenly distributed,the removal rate of olefin meal box was only 60%.The removal rate of nitrate nitrogen was related to the distribution form of solid carbon source,the removal rate of ethanol per unit mass was about 21 times that of cotton.The restoration effect of liquid carbon source ethanol is obviously better than that of solid carbon source.