阿特拉津对固相反硝化的影响和去除机制研究

发布时间：2018-02-14 05:06

本文关键词： 阿特拉津稻草秸秆固相反硝化吸附作用　出处：《水处理技术》2017年07期 　论文类型：期刊论文

【摘要】：通过静态实验,探究阿特拉津含量对反硝化作用的影响以及固相反硝化对阿特拉津的去除机制。结果表明,质量浓度为1 mg/L和5 mg/L的阿特拉津对固相反硝化没有明显的影响,阿特拉津去除率分别为96.34%和86.72%;当阿特拉津的初始质量浓度达到10 mg/L时,硝态氮去除率略微下降了10%左右,阿特拉津的去除率下降迅速下降至62.33%。前期主要依靠稻草秸秆的吸附作用去除阿特拉津;随着稻草秸秆对阿特拉津的吸附达到了饱和,吸附作用趋于平缓,反硝化菌的生物作用开始显现。2种作用同时进行使得阿特拉津去除率最终达到90%以上。依靠吸附作用去除的阿特拉津始终占被去除总量的70%以上,说明固相反硝化系统对阿特拉津的去除主要依靠吸附作用。
[Abstract]:The effects of atrazine content on denitrification and the removal mechanism of atrazine by solid phase denitrification were investigated by static experiments. The results showed that atrazine with mass concentration of 1 mg/L and 5 mg/L had no obvious effect on solid phase denitrification. The removal rates of atrazine were 96.34% and 86.72, respectively. When the initial mass concentration of atrazine reached 10 mg/L, the removal rate of nitrate nitrogen decreased slightly by about 10%. The removal rate of atrazine decreased rapidly to 62.33.The adsorption of atrazine was mainly dependent on the adsorption of straw, and with the adsorption of atrazine to straw reached saturation, the adsorption of atrazine tended to flatten. The biological effects of denitrifying bacteria began to show that atrazine removal rate was more than 90% at the same time, and atrazine removal by adsorption always accounted for more than 70% of the total removal amount. It shows that the removal of atrazine by solid phase denitrification system mainly depends on adsorption.
【作者单位】：沈阳建筑大学市政与环境工程学院;
【基金】：国家自然科学基金项目(51108277) 建设部科学技术计划项目(2012-k7-05) 沈阳建筑大学学科涵育项目
【分类号】：X592

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