Assessment of benzene, toluene, ethyl-benzene, and xylene (BTEX) toxicity in soil using sulfur-oxidizing bacterial (SOB) bioassay
- Authors
- Ahmed, Naveed; Ok, Yong Sik; Jeon, Byong-Hun; Kim, Jung Rae; Chae, Kyu-Jung; Oh, Sang-Eun
- Issue Date
- 4월-2019
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- BTEX toxicity; Sulfur-oxidizing bacterial bioassay; Soil toxicity; Benzene; Toluene; Ethyl-benzene; Xylene
- Citation
- CHEMOSPHERE, v.220, pp.651 - 657
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMOSPHERE
- Volume
- 220
- Start Page
- 651
- End Page
- 657
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66437
- DOI
- 10.1016/j.chemosphere.2018.12.102
- ISSN
- 0045-6535
- Abstract
- The assessment of benzene, toluene, ethyl-benzene, and xylene (BTEX)-contaminated soil toxicity was performed using a sulfur-oxidizing bacteria (SOB) assay. The experiments were set up using an individual pollutant in a 25-mL bottle sealed with a rubber stopper and aluminum cap since BTEX are volatile. A large headspace volume (14 mL) was kept in the reactors to provide enough oxygen for the SOB. Soil samples were spiked with BTEX compounds in the concentration range of 1-1000 mg/kg. In reactors without BTEX compounds, approximately 85% of the theoretically required oxygen was consumed. Whereas, the reactors with benzene consumed in the range of 82-64% (5-100 mg/kg), those with toluene consumed 76-53% (1-50 mg/kg), those with ethyl-benzene consumed 44-71% (5-100 mg/kg), and those with xylene consumed 64-71% (1-10 mg/kg) of the theoretically required oxygen. The effective concentrations responsible for 50% growth inhibition (EC50) for benzene, toluene, ethyl-benzene, and xylene detection were 130.2, 1.2, 15.2, and 0.7 mg/kg, respectively. These results suggest that this SOB-based bioassay can detect BTEX pollutants in soils. (C) 2018 Elsevier Ltd. All rights reserved.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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