铜铁元素对硫自养反硝化的效率影响

IMPACTS OF CU AND FE ON SULFUR AUTOTROPHIC DENITRIFICATION PERFORMANCE

文章基于硫自养反硝化处理模拟硝酸盐污染地下水,探究金属元素Fe^(2+)和Cu^(2+)添加量对体系反硝化效果的影响。结果表明:添加0.10%、0.20%Fe^(2+)或0.05%Cu^(2+)对硝酸盐去除效果以及脱氮速率有较明显的促进作用。反应进行216 h后,硝酸盐去除率稳定保持在97%以上,最高达到99%。研究发现金属离子的适量添加可以有效降低体系硫酸根的积累量。在整个反应期中,合成材料为反硝化系统提供了充足的碱度,保障了反硝化的有效进行。

This paper uses sulfur autotrophic denitrification to treat nitrate-polluted underground water so as to explore the impacts of Cu^2＋and Fe^2＋ion addition on denitrification. Addition of Fe^2＋ions at 0. 10% and 0. 20% or Cu^2＋ion at 0. 05% can effectively remove the nitrate and promote the denitrification rate. After 216 hours in reaction,nitrate removal rate reaches at 97%,up to 99%. Appropriate addition of metal ions may significantly reduce the accumulation of sulfates. In the entire reaction,composite material provides sufficient alkalinity for denitrification system,which guarantees the efficiency of denitrification reaction.