NH3-N浓度对太湖竺山湾水体及沉积物中硝化作用的影响
Effects of Different NH3-N Concentrations on the Nitrification Process in Waters
投稿时间:2011-12-21  修订日期:2012-02-18
DOI:
中文关键词:非离子态氨  太湖  水体  沉积物  硝化作用  
英文关键词:unionized ammonia  Taihu Lake  waters  sediment  nitrification process
基金项目: 厦门理工学院引进高层次人才启动项目(YKJ09022R);厦门市科技计划项目(3502Z 20110016)
作者单位E-mail
陈国元* 厦门理工学院水资源环境研究所福建厦门 361005 cgy1117@yahoo.com.cn 
摘要点击次数: 2476
全文下载次数: 2632
中文摘要:
       通过模拟培养试验,比较不同浓度非离子态氨(NH3-N)条件下,富营养化湖泊———太湖竺山湾水体及沉积物中硝化作用2个过程,即氨氧化和亚硝酸盐氧化的发生情况。结果表明,在试验设置的NH3-N浓度范围内,水体和沉积物中氨氧化速率都随着NH3-N浓度的升高显著增加(LSD检验,P<0.05),亚硝酸盐氧化速率却呈阶段性变化。水体中NH3-N浓度大于0.35 mg/L时,亚硝酸盐氧化速率开始显著降低(LSD检验,P<0.05),而氨氧化速率与亚硝酸盐氧化速率的比值从NH3-N浓度为0.15 mg/L开始随着NH3-N浓度的升高而显著增加,说明水体中亚硝酸盐氧化过程在NH3-N浓度为0.15 mg/L时已受到部分抑制;沉积物中亚硝酸盐氧化速率在NH3-N浓度大于0.65 mg/L时开始降低(LSD检验,P>0.05),而氨氧化速率与亚硝酸盐氧化速率的比值从NH3-N浓度为0.35 mg/L开始随着NH3-N浓度的升高而显著增加,说明沉积物中亚硝酸盐氧化过程在NH3-N浓度为0.35 mg/L时已受到部分抑制。太湖竺山湾水体中的NH3-N浓度为0.19 mg/L,已达到对亚硝酸盐氧化过程的抑制范围;沉积物间隙水中NH3-N浓度为0.16mg/L,还未对亚硝酸盐氧化过程产生抑制效果。
英文摘要:
      Through the in-door simulation experiment,two processes of nitrification,namely ammonia oxidation and nitrite oxidation in water and sediment from Zhushan Bay of Taihu Lake were studied under different unionized ammonia (NH3-N)concentrations. The results showed that,in the range of ammonia concentrations designed in experiment,ammonia oxidation rates in water and sediment increased significantly with the increasing of NH3-N concentrations(LSD test,P<0.05).However, the occurrence of nitrite oxidation process had different stages. In water, nitrite oxidation rates started to decrease significantly(LSD test,P<0. OS)when NH:-N concentrations were more than 0. 35 mg/L. The ratio between ammonia oxidation rates to nitrite oxidation rates increase significantly when NH3-N concentrations were more than 0. 15 mg/L,indicating that nitrite oxidation rate has been partly inhibited when NH3-N concentration was 0. 15 mg/L. NH3-N concentration in the water of Zhushan Bay,Taihu Lake was 0. 19 mg/L which has achieved the range of inhibition to nitrite oxidation .In sediment,nitrite oxidation rates started to decrease(LSDtest,P>0.05) when NH3-N concentration were more than 0. 65 mg/L. The ratios between ammonia oxidation rates to nitrite oxidation rates increased significantly when NH3-N concentrations were more than 0. 35 mg/L, indicating that nitrite oxidation rate has been partly inhibited when NH3-N concentration was 0.35 mg/L. NH3-N concentration in the interstitial water of Zhushan Bay,Taihu Lake was 0.16mg/L which has not resulted in significant inhibition to nitrite oxidation.
陈国元.2012.NH3-N浓度对太湖竺山湾水体及沉积物中硝化作用的影响[J].水生态学杂志,33(2):55-60.
查看全文  查看/发表评论  下载PDF阅读器   HTML
Copyright © 2008 《水生态学杂志》编辑部 地址:湖北省武汉市雄楚大街578号 
邮编:430079 电话:027-82926630 E-mail: sstx@mail.ihe.ac.cn  京ICP备09084417号