石墨烯氧化物对土壤酶活性和微生物生物量的影响。
Effects of graphene oxides on soil enzyme activity and microbial biomass.
机构信息
Department of Environmental Engineering, Konkuk University, Seoul 143-701, Republic of Korea.
Department of Materials Science and Engineering, Korea University, Seoul 136-713, Republic of Korea.
出版信息
Sci Total Environ. 2015 May 1;514:307-13. doi: 10.1016/j.scitotenv.2015.01.077. Epub 2015 Feb 7.
Due to recent developments in nanotechnology, nanomaterials (NMs) such as graphene oxide (GO) may enter the soil environment with mostly unknown consequences. We investigated the effects of GO on soil microbial activity in a 59-day soil incubation study. For this, high-purity GO was prepared and characterized. Soils were treated with up to 1 mg GO g(-1) soil, and the changes in the activities of 1,4-β-glucosidase, cellobiohydrolase, xylosidase, 1,4-β-N-acetyl glucosaminidase, and phosphatase and microbial biomass were determined. 0.5-1 mg GO g(-1) soil lowered the activity of xylosidase, 1,4-β-N-acetyl glucosaminidase, and phosphatase by up to 50% when compared to that in the control soils up to 21 days of incubation. Microbial biomass in soils treated with GO was not significantly different from that in control soils throughout the incubation period, and the soil enzyme activity and microbial biomass were not significantly correlated in this study. Our results indicate that soil enzyme activity can be lowered by the entry of GO into soils in short term but it can be recovered afterwards.
由于纳米技术的最新发展，氧化石墨烯（GO）等纳米材料可能会进入土壤环境，带来大多数未知的后果。我们在一项为期 59 天的土壤培养研究中研究了 GO 对土壤微生物活性的影响。为此，我们制备并表征了高纯度 GO。将土壤用高达 1mg GO g（-1）的 GO 处理，并测定了 1,4-β-葡聚糖酶、纤维二糖水解酶、木糖苷酶、1,4-β-N-乙酰葡萄糖胺酶和磷酸酶的活性以及微生物生物量的变化。与对照土壤相比，0.5-1mg GO g（-1）的土壤在培养 21 天内可使木糖苷酶、1,4-β-N-乙酰葡萄糖胺酶和磷酸酶的活性降低高达 50%。在整个培养期间，GO 处理的土壤中的微生物生物量与对照土壤中的微生物生物量没有显著差异，并且在本研究中，土壤酶活性与微生物生物量没有显著相关性。我们的研究结果表明，GO 进入土壤可能会在短期内降低土壤酶活性，但随后会得到恢复。
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