刘娟凤,王昌辉,王志新,裴元生.给水厂废弃铁铝泥对湖泊沉积物好氧氨氧化作用的影响[J].环境科学学报,2015,35(2):520-526
给水厂废弃铁铝泥对湖泊沉积物好氧氨氧化作用的影响
- Influence of ferric and aluminum residuals on ammonia oxidation in lake sediment
- 基金项目：国家自然科学基金(No.51278055)
- 刘娟凤
- 北京师范大学环境学院, 教育部水沙科学重点实验室, 北京 100875
- 王昌辉
- 北京师范大学环境学院, 教育部水沙科学重点实验室, 北京 100875
- 王志新
- 北京师范大学环境学院, 教育部水沙科学重点实验室, 北京 100875
- 裴元生
- 北京师范大学环境学院, 教育部水沙科学重点实验室, 北京 100875
- 摘要：给水厂废弃铁铝泥(Ferric and aluminum residuals, FARs)可用于控制湖泊沉积物磷释放.因此,在实际应用之前对FARs的风险进行评估非常重要.本研究通过室内富集实验,考察FARs对沉积物中氨氧化菌(ammonia-oxidizing bacteria, AOB)活性、丰度和多样性的影响.结果表明:投加FARs后,沉积物对氨氮的去除能力微弱提高.富集后沉积物中AOB丰度增加,投加FARs的沉积物中AOB丰度达到1.32×108 copies·g-1,而未投加FARs的沉积物中AOB丰度为1.14×108 copies·g-1.此外,amoA基因的系统发育分析表明富集前后沉积物中的AOB均附属于Nitrosospira和Nitrosomonas两个种属,并且投加FARs沉积物中AOB的多样性略高于未投加的.综上结果表明,FARs回用于湖泊富营养化控制的同时,将有益于沉积物中好氧氨氧化作用的进行.
- Abstract：Ferric and aluminum residuals (FARs) from drinking water treatment plant can be used to control phosphorus release from lake sediment. It is therefore important to assess the risk of FARs before practical application. In this study, variations of the activity, abundance and diversity of ammonia-oxidizing bacteria (AOB) in sediment with FARs addition were investigated based on a laboratory enrichment test. The results showed that ammonia removal rate in the sediment slightly increased after FARs addition. The AOB abundance in the sediment with FARs achieved 1.32×108 copies·g-1 while that in the original sediment was 1.14×108 copies·g-1. Furthermore, phylogenetic analysis of amoA genes indicated that AOB in the sediments were affiliated to Nitrosospira and Nitrosomonas species. The diversity of AOB in the sediment with FARs was higher than that without FARs. Overall, these results suggested that the reuse of FARs for eutrophication control could favor ammonia oxidation in the lake sediment.
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