High concentrations of single-walled carbon nanotubes lower soil enzyme activity and microbial biomass
- Authors
- Jin, Lixia; Son, Yowhan; Yoon, Tae Kyung; Kang, Yu Jin; Kim, Woong; Chung, Haegeun
- Issue Date
- 1-2월-2013
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Nanomaterial; Carbon nanotube; Soil microorganism; Extracellular enzyme; Surface area; Soil incubation
- Citation
- ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, v.88, pp.9 - 15
- Indexed
- SCIE
SCOPUS
- Journal Title
- ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
- Volume
- 88
- Start Page
- 9
- End Page
- 15
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/103993
- DOI
- 10.1016/j.ecoenv.2012.10.031
- ISSN
- 0147-6513
- Abstract
- Nanomaterials such as single-walled carbon nanotubes (SWCNTs) may enter the soil environment with unknown consequences resulting from the development of nanotechnology for a variety of applications. We determined the effects of SWCNTs on soil enzyme activity and microbial biomass through a 3-week incubation of urban soils treated with different concentrations of SWCNTs ranging from 0 to 1000 mu g g(-1) soil. The activities of cellobiohydrolase, beta-1,4-glucosidase, beta-1,4-xylosidase, beta-1,4-N- acetylglucosaminidase, L-leucine aminopeptidase, and acid phosphatase and microbial biomass were measured in soils treated with powder and suspended forms of SWCNTs. SWCNTs of concentrations at 300-1000 mu g g(-1) soil significantly lowered activities of most enzymes and microbial biomass. It is noteworthy that the SWCNTs showed similar effects to that of multi-walled carbon nanotubes (MWCNTs), but at a concentration approximately 5 times lower; we suggest that this is mainly due to the higher surface area of SWCNTs than that of MWCNTs. Indeed, our results show that surface area of CNTs has significant negative relationship with relative enzyme activity and biomass, which suggests that greater microorganism-CNT interactions could increase the negative effect of CNTs on microorganisms. Current work may contribute to the preparation of a regulatory guideline for the release of CNTs to the soil environment. (C) 2012 Elsevier Inc. All rights reserved.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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