文献类型：期刊文献

中文题名：潮汐流人工湿地的除氮效果及影响因素

英文题名：Depth Variations and Factors Influencing Nitrogen Removal in Tidal Flow Constructed Wetlands

作者：张亚琼[1,2] 崔丽娟[1,2] 李伟[1,2] 李凯[1,2]

第一作者：张亚琼

通信作者：Cui, Lijuan

机构：[1]中国林业科学研究院湿地研究所;[2]湿地生态功能与恢复北京市重点实验室

年份：2015

卷号：28

期号：7

起止页码：1172-1178

中文期刊名：环境科学研究

外文期刊名：Research of Environmental Sciences

收录：CSTPCD;;国家哲学社会科学学术期刊数据库;EI(收录号：20153201124430);Scopus(收录号：2-s2.0-84938693979);北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；CSSCI:【CSSCI_E2014_2016】；

基金：中央级公益性科研院所基本科研业务专项(CAFYBB2014QA029;CAFINT2013C13)

语种：中文

中文关键词：潮汐流;连续流;人工湿地;氮去除;深度

外文关键词：tidal flow; continuous flow; constructed wetland; nitrogen removal; depth

分类号：X524

摘要：为研究TF-CW（tidal flow constructed wetland,潮汐流人工湿地）的除氮效果及其主要影响因素,以连续流模拟装置（A组）为对照,设置3种潮汐进水方式〔RAT（闲置时间∶反应时间）分别为1∶1、1∶2、2∶1,依次记做B组、C组、D组〕,运行175 d,分析不同进水方式下TF-CW模拟装置对TN、NH4＋-N、NO3--N、TOC的去除效果及其在不同处理深度上的变化.结果表明：A、B、C、D组TN平均去除率分别为82.41%±4.84%、84.82%±5.09%、86.09%±3.99%、90.23%±3.05%.A组TN和NH4＋-N的去除效果与B、C、D组均差异显著（P〈0.05）,其中D组TN和NH4＋-N的去除效果均最好;A组对NO3--N的总体去除效果较优;RAT并不影响TOC的去除率.不同进水方式下,NH4＋-N的去除率均在0~15 cm深度内最大,ρ（TOC）处于较低水平（0~20 mg/L）,二者均随处理深度的不断增加而逐渐下降;ρ（NO3--N）在0~15 cm深度内迅速上升.随着闲置时间的增加,ρ（DO）逐渐升高.TN和NH4＋-N的去除率随着运行时间的增加基本保持恒定,主要影响因子有ρ（DO）、RAT、ORP（oxidation reduction potential,氧化还原电位）和ρ（TOC）;而NO3--N的去除率随着运行时间的增加而逐渐降低,其主要影响因子有p H、电导率和水温等.
To study the main nitrogen removal factors in a tidal flow constructed wetland（ TF-CW）,idle/response times（ RAT） for three different water input scenarios of TF-CWs（ 1∶ 1（ B）,1∶ 2（ C） and 2∶ 1（ D）） were compared for a continuous flow wetland versus a control group（ A）. After running the experiment for 175 days,the removal efficiencies and depth variations of the total nitrogen（ TN）,ammonium nitrogen（ NH4＋-N）,nitrate nitrogen（ NO3--N） and total organic carbon（ TOC） were analyzed. The results showed that the average TN removal rate was 82. 41% ± 4. 84% for A,and 84. 82% ± 5. 09%,86. 09% ± 3. 99% and 90. 23% ± 3. 05% for the three TF-CWs,B,C and D,respectively. Significant differences existed between the control（ A） and the TF-CWs（ B,C and D; P 0. 05）.Scenario D was the most efficient for TN and NH4＋-N removal. The control（ A） showed higher removal efficiency for NO3--N. In general,the idle/reaction time did not affect the removal rate of TOC. The NH4＋-N removal rate was maximally efficient when the reaction depth ranged from 0 to 15 cm,and with increasing depth the removal rate slowed. The stage also showed rapidly rising ρ（ NO3--N）,whereas ρ（ TOC） was lower（ 0-20 mg/L） and further decreased with depth. A longer idle time contributed to higher ρ of dissolved oxygen（ DO）. The TN and NH4＋-N removal rates did not significantly temporally vary in the TF-CWs. The main factors affecting the removal of TN and NH4＋-N included DO, idle/response time, oxidation reduction potential（ ORP） and TOC. The NO3--N removal rate became slower as the time increased, while the other main factors that influenced its removal rate included p H,conductivity and water temperature.