摘要
研究旨在优化人工湿地中美人蕉净化硝态氮的最佳组合条件。该研究采用单因素实验考察湿地系统中甲醇浓度(A)、硝酸盐浓度(B)及处理时间(C)对美人蕉吸收硝态氮的影响,在此基础上,利用Design-Expert软件并采用CCD设计三因素五水平的响应面分析法,对美人蕉净化硝态氮条件进行优化。研究表明当甲醇预处理浓度为2.75mM,预处理时间4 h,硝酸根离子浓度为38mg/L时,美人蕉吸收硝酸根离子的效率可达最大,最大吸收效率为0.062mg/(L·g)FW。在实际应用中,可依据试验结果对种植美人蕉的湿地系统施用甲醇,调整系统中硝态氮的浓度,以促进美人蕉对湿地系统中硝态氮的吸收。
The study aims to optimize the optimal combination conditions for purifying nitrate nitrogen in constructed wetlands by cana generalis.In this study,a single-factor experiment was carried out to investigate the impacts of methanol concentration(A),nitrate concentration(B),and treatment duration(C)on the absorption of nitrate nitrogen by cana generalis in wetland systems.Based on this,a response surface analysis method with three factors and five levels was designed using Design Expert software and CCD to optimize the conditions of purification of nitrate nitrogen by cana generalis.The study indicated that when the concentration of methanol used for pretreatment was 2.75mM,the pretreatment duration was 4h,and the concentration of NO-3-N was 38mg/L,cana generalis can absorb nitrate ions at maximum efficiency of 0.062mg/(L·g)FW.In practical application,methanol can be applied to the wetland system planted with canna generalis according to the test results,and the concentration of nitrate nitrogen in the system can be adjusted to promote the absorption of nitrate nitrogen by canna generalis in the wetland system.
作者
吴文卫
武孔焕
周丹丹
WU Wen-wei;WU Kong-huan;ZHOU Dan-dan(Yunnan Academy of Ecological&Environmental Sciences,Kunming 650034,China;Yunnan Engineering Research Center of Heavy Metal Pollution Control,Kunming 650034,China;Faculty of Environmental Science&Engineering,KUST,Kunming 650500,China)
出处
《四川环境》
2024年第1期165-171,共7页
Sichuan Environment
基金
国家自然科学基金资助项目(41703121)
昆明理工大学人才启动项目(KKSY201722006)
云南省重点研发计划资助(2018BC004)
云南省“万人计划-青年拔尖人才”计划项目。
关键词
美人蕉
甲醇
人工湿地
硝态氮
响应面法
Cana generalis
methanol
constructed wetland
nitrate nitrogen
response surface methodology
