文章摘要
张燕, 伏春燕, 阎百兴, 李新华, 阎佩佩, 魏祥法, 石天虹, 刘雪兰.亚铁对水平潜流人工湿地污染物去除能力的分层效应影响[J].水土保持学报,2019,33(1):306~314
亚铁对水平潜流人工湿地污染物去除能力的分层效应影响
Effect of Ferrous Iron Addition on the Layering Effect of Contaminant Removal in Horizontal Subsurface Flow Constructed Wetlands
投稿时间:2018-08-23  
DOI:10.13870/j.cnki.stbcxb.2019.01.048
中文关键词:     有机物  芦苇  炉渣
英文关键词: iron  nitrogen  organic matter  Phragmites australis  slag
基金项目:国家自然科学基金项目(41501520);山东省农业科学院创新工程项目(CXGC2016A08);山东省科技发展计划项目(2014GGH210001);山东省现代农业产业技术体系家禽创新团队建设项目(SDAIT-11-06)
作者单位E-mail
张燕1, 伏春燕1, 阎百兴2, 李新华3, 阎佩佩1, 魏祥法1, 石天虹1, 刘雪兰1 1. 山东省农业科学院家禽研究所, 济南 250023

2. 中国科学院东北地理与农业生态研究所
, 湿地生态与环境重点实验室, 长春 130102

3. 山东农业可持续发展研究所
, 济南 250100 
jqsliuxl@163.com 
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中文摘要:
      通过模拟试验,考察并探讨不同浓度亚铁添加对水平潜流人工湿地中氮和COD去除能力的影响以及作用机理。结果表明:添加亚铁有利于水平潜流人工湿地各层中总氮、硝态氮和铵态氮的去除效果,而且添加亚铁浓度为50 mg/L的人工湿地系统优于其他各处理组,但是过高的亚铁添加又限制了氮的去除效果,尤其是对下层铵态氮的去除能力有抑制作用,但是均高于对照组,而且亚铁添加影响了湿地系统这3种机形态的氮分层效应。亚铁的添加促进试验初期人工湿地对COD的去除能力,在一定程度上影响了各层COD的去除效果。亚铁离子进入人工湿地后,系统中各层铁元素浓度迅速下降,但是由于铁元素的变价结构及其易水解特性,使得各处理系统出水pH先增加后趋于平稳,且下层pH低于上层和中层,同时也使得系统各层氧化还原电位(ORP)发生变化。亚铁添加促进了湿地系统中ORP的分层,却减缓了ORP的下降。
英文摘要:
      For understanding the effect of ferrous iron addition on contaminant removal in different layers of horizontal subsurface flow constructed wetlands, the nitrogen and COD removal and their mechanisms were investigated in this study. The results showed that addition of ferrous iron was beneficial to the removal of total nitrogen, nitrate nitrogen and ammonium nitrogen, and the removal of nitrogen was optimized at the ferrous iron concentration of 50 mg/L. However, the excessive ferrous iron addition inhibited nitrogen removal, especially for the removal of ammonium nitrogen in the lower layers, while the nitrogen removal with ferrous iron addition was greater than that without ferrousiron. As well, ferrous iron addition altered the layering effect of the three inorganic forms of nitrogen. At the beginning of the experiment, ferrous iron addition improved the COD removal, affecting the COD removal in the different layers. Iron concentrations in the different layers dropped rapidly after the input of ferrous iron, while pH values in the effluent increased first and then kept in a stable trend due to the valence structure and hydrolytic characteristics of iron. The pH value in the lower layer was lower than those in the upper and middle layers. Iron properties also caused the changes of oxidation reduction potential (ORP) in different layers. Addition of ferrous iron promoted the layering effect of ORP, but slowed down the decrease of ORP.
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