缓释碳源复合材料的制备及其用于地下水硝酸盐污染修复的研究  

PREPARATION OF SLOW-RELEASE CARBON SOURCE COMPOSITE MATERIALS AND THEIR USE FOR GROUNDWATER NITRATE POLLUTION RESTORATION

作　　者：杨帆[1] 王鹤立[1] 

机构地区：[1]中国地质大学(北京)水资源与环境学院,北京100083

出　　处：《水处理技术》2013年第4期75-79,83,共6页Technology of Water Treatment

摘　　要：针对地下水硝酸盐污染生物修复过程中外加碳源消耗快,不能长期持续提供有机碳源和作为微生物载体的问题,在对碳源原料和骨架原料遴选的基础上,将原料共混,采用双螺杆挤出机制备了5种缓释碳源复合材料HB20、HB40、HE40、HLE和HBE。并对其进行了静态、动态试验。结果表明,静态试验中,HB20和HB40的释碳能力一般,CODMn分别为5.42和12.83 mg/L。动态试验中,HE40的脱氮效果不佳,硝酸盐氮去除率在20%左右;HLE的硝酸盐氮去除率从开始阶段的57.9%下降到第30天的13.1%,脱氮持久力较差;HBE的反硝化效果最佳,可持续释放有机碳源,在运行的66 d里硝酸盐氮去除率始终在96.0%以上,是最适合作为地下水硝酸盐污染修复的碳源载体材料。Additional carbon source consume fast and couldn＇t continue offering long-term organic carbon source in the bioremediation process of groundwater nitrate pollution. First, appropriate carbon source materials and skeleton materials were chosen to blend with raw materials, and then five kinds of slow-release carbon source composite material HB20, HB40, HE40, HLE and HBE were prepared by double-screw extruder. Their performance was detected through static and dynamic experiments. The results showed that： In the static experiments, HB20 and HB40 had general release carbon ability, their CODMn were 5.42 and 12.83 mg/L, respectively. In the dynamic experiments, denitfification effect of HE40 was not good, and nitrate nitrogen removal rate was about 20%. Nitrate nitrogen removal rate of HLE reduced from 57.9% to 13.1% within 30 days, and denitrification endurance was not good. HBE had the best denitrifying effect, which can release organic carbon source continuously. Nitrate nitrogen removal rate was always more than 96.0% in the operation of the 66 days, so HBE was the most suitable carbon source carder material to use in groundwater nitrate pollution restoration.

关 键 词：缓释碳源复合材料 地下水 硝酸盐污染 生物修复技术 

分 类 号：X523[环境科学与工程—环境工程]