尿素酶
化学
纳米颗粒
过氧化氢酶
生物量(生态学)
环境化学
农学
酶
材料科学
生物化学
纳米技术
生物
作者
Wenchao Du,Yuanyuan Sun,Rong Ji,Jianguo Zhu,Jichun Wu,Hongyan Guo
出处
期刊:Journal of Environmental Monitoring
[The Royal Society of Chemistry]
日期:2011-01-01
卷期号:13 (4): 822-822
被引量:494
摘要
The properties of nanoparticles and their increased use have raised concerns about their possible harmful effects within the environment. Most studies on their effects have been in aqueous systems. Here we investigated the effect of TiO(2) and ZnO nanoparticles on wheat growth and soil enzyme activities under field conditions. Both of the nanoparticles reduced the biomass of wheat. The TiO(2) nanoparticles were retained in the soil for long periods and primarily adhered to cell walls of wheat. The ZnO nanoparticles dissolved in the soil, thereby enhancing the uptake of toxic Zn by wheat. The nanoparticles also induced significant changes in soil enzyme activities, which are bioindicators of soil quality and health. Soil protease, catalase, and peroxidase activities were inhibited in the presence of the nanoparticles; urease activity was unaffected. The nanoparticles themselves or their dissolved ions were clearly toxic for the soil ecosystem.
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