摘要
采用改进顶空法批量试验,分别对比铵态氮、硝态氮及混合氮源在有无碳源共同处理时的去除效果。结果表明:与无碳源处理相比,碳源共施处理促进含沉水植物的微宇宙对不同氮源的净化效果,有碳源处理的TN去除率分别较无碳源处理提高了53.07%(铵态氮)、39.66%(硝态氮)、50.57%(混合氮源)。促进植物对氮源的吸收是外碳源强化微宇宙对氮源净化效果的主要机理之一。与氮源单独处理相比,碳源氮源共施处理植物氮吸收量分别增加了56.26 mg/g(铵态氮)、48.58 mg/g(硝态氮)、35.80 mg/g(混合氮源)。改变环境条件从而影响氮源的迁移转化,是碳源影响氮源去除效果的另一机理。因此,改变水质、改变迁移转化途径、促进植物吸收是外碳源促进氮去除的主要方法。
The modified headspace method was used to compare the removal of ammonium,nitrate,and mixed nitrogen with or without carbon source.The results showed that in the treatment without carbon source,the co-application of carbon source promoted the removal of all kinds of nitrogen pollutants in plant system.The removal rate of TN with carbon source treatment was increased by 53.07%(ammonium as nitrogen pollutant)compared with non-carbon source treatment,and 39.66%for nitrate pollutant,50.57%for mixed nitrogen pollutant.Promoting the absorption of nitrogen pollutant by plants was one of the main mechanisms.A good way can be used to enhance the removal of nitrogen pollutant in plant systems.Compared with the single nitrogen source treatment,the nitrogen uptake of plants,in the co-application of carbon and nitrogen sources,can be increased by 56.26 mg·g-1(ammonium nitrogen),48.58 mg·g-1(nitrate nitrogen),and 35.80 mg·g-1(mixed nitrogen sources),respectively.Another mechanism in carbon sources affects the removal efficiency of nitrogen sources by changing environmental conditions.Therefore,changing water quality,changing migration and transformation pathway and promoting plant absorption are all the methods to promote nitrogen removal in external carbon sources.
作者
覃思跃
陈国宁
陆立海
蒋婷
李文文
陈永利
宋海农
QIN Si-yue;CHEN Guo-ning;LU Li-hai;JIANG Ting;LI Wen-wen;CHEN Yong-li;SONG Hai-nong(Guangxi Bossco Environmental Protection Technology Co.,Ltd.,Nanning 530007,China)
出处
《桂林理工大学学报》
CAS
北大核心
2020年第4期803-810,共8页
Journal of Guilin University of Technology
基金
广西科技重大专项(桂科AA17202032)
南宁市重点研发计划项目(20173159-1)
广西八桂学者专项。
关键词
外源碳
氮源
混合氮源
反硝化作用
吸收
exogenous carbon sources
nitrogen pollutant
mixed nitrogen pollutant
denitrification
absorption
