南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (1): 115124.
张会玲1,张雯2,张庆泉1,刘翠翠1,马天海3,郭红岩1*
Zhang Huiling1, Zhang Wen2,Zhang Qingquan1, Liu Cuicui1, Ma Tianhai2,Guo Hongyan1*
摘要: 本文针对我国地下水硝酸盐污染问题,以农业废弃物资源化利用为核心,耦合化学与生物过程,利用农作物秸秆和零价铁为主要原材料,辅以高渗透性材料和塑性粘结材料,按不同配比研发出一种用于去除地下水中硝酸盐的复合缓释功能材料。所研发复合缓释功能材料具有一定的强度和孔隙度,能够缓慢持续的释放碳源。将该材料用于室内模拟实验,以研究复合缓释功能材料与含水层介质(粗砂)填充比的不同对硝酸盐去除效果的影响,结果表明除材料与砂按1:0时由于零价铁释放过多导致出水氨氮含量稍高外,其他各填充比对材料修复效果影响不大,硝态氮去除率均在85%以上;应用于野外原位修复,试验运行175天后,去除率高于70%,过程中没有产生亚硝态氮和氨氮的累积,为污染地下水原位修复提供了重要的技术支撑。
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