吉林大学学报(理学版) ›› 2018, Vol. 56 ›› Issue (6): 1570-1576.

• 环境科学 • 上一篇    

纳米TiO2对土壤中硝态氮质量比及硝酸还原酶活性的影响

封保根, 郭平, 李琳慧, 孙影, 陈薇薇   

  1. 吉林大学 新能源与环境学院, 地下水资源与环境教育部重点实验室, 长春 130012
  • 收稿日期:2017-12-11 出版日期:2018-11-26 发布日期:2018-11-27
  • 通讯作者: 陈薇薇 E-mail:chen vv@jlu.edu.cn

Effect of NanoTiO2 on Mass Ratio of Nitrate Nitrogenand Activity of Nitrate Reductase in Soil#br#

FENG Baogen, GUO Ping, LI Linhui, SUN Ying, CHEN Weiwei   

  1. Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of New Energy and Environment, Jilin University, Changchun 130012, China
  • Received:2017-12-11 Online:2018-11-26 Published:2018-11-27

摘要: 用室内模拟培养实验考察纳米TiO2对土壤中硝态氮质量比及硝酸还原酶(nitrate reductase, NR)活性的影响. 结果表明: 纳米TiO2可降低土壤中硝态氮质量比和NR活性, 随着培养时间的增加, 降低程度呈先增加后降低的趋势; 在相同采样时间下, 纳米TiO2在不同土壤中硝态氮质量比和NR活性的降低程度为沙土>黑土>草炭土, 且降低程度随纳米TiO2添加量的增加而增加; 紫花苜蓿使纳米TiO2对土壤中硝态氮质量比和NR活性的降低程度减弱. 因此, 纳米TiO2可降低土壤反硝化作用强度和速率; 紫花苜蓿可降低纳米TiO2的生物毒性.

关键词: 纳米TiO2, 土壤, 硝态氮, 硝酸还原酶活性

Abstract: The effect of nanoTiO2 on the mass ratio of nitrate nitrogen and activity of nitrate reductase (NR) in soils were investigated by laboratory simulation experiments. The results show that the nanoTiO2 can reduce the mass ratio of nitrate nitrogen and the activity of NR in soil, with the increase of time, the degree of reduction increased first and then decreased. Under the same sampling time, the mass ratio of nitrate nitrogen and NR activity of nano-TiO-2 in different types of soil decrease as follows: sandy soil>black soil>peat soil, and the degree of reduction increases with the increase of nanoTiO2 addition. In the presence of alfalfa, nanoTiO2 decreases the mass ratio of nitrate nitrogen and NR activity in the soil. Therefore, the nanoTiO2 can reduce the intensity and rate of soil denitrification, and alfalfa can reduce the biological toxicity of nanoTiO2.

Key words: nanoTiO2, soil, nitrate nitrogen, activity of nitrate reductase

中图分类号: 

  • X171