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HERO ID
2708519
Reference Type
Journal Article
Title
Chemical and toxicological evaluation of underground coal gasification (UCG) effluents. The coal rank effect
Author(s)
Kapusta, K; Stańczyk, K
Year
2015
Is Peer Reviewed?
Yes
Journal
Ecotoxicology and Environmental Safety
ISSN:
0147-6513
EISSN:
1090-2414
Volume
112
Page Numbers
105-113
Language
English
PMID
25463860
DOI
10.1016/j.ecoenv.2014.10.038
Web of Science Id
WOS:000346755400015
URL
http://
://WOS:000346755400015
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Abstract
The effect of coal rank on the composition and toxicity of water effluents resulting from two underground coal gasification experiments with distinct coal samples (lignite and hard coal) was investigated. A broad range of organic and inorganic parameters was determined in the sampled condensates. The physicochemical tests were supplemented by toxicity bioassays based on the luminescent bacteria Vibrio fischeri as the test organism. The principal component analysis and Pearson correlation analysis were adopted to assist in the interpretation of the raw experimental data, and the multiple regression statistical method was subsequently employed to enable predictions of the toxicity based on the values of the selected parameters. Significant differences in the qualitative and quantitative description of the contamination profiles were identified for both types of coal under study. Independent of the coal rank, the most characteristic organic components of the studied condensates were phenols, naphthalene and benzene. In the inorganic array, ammonia, sulphates and selected heavy metals and metalloids were identified as the dominant constituents. Except for benzene with its alkyl homologues (BTEX), selected polycyclic aromatic hydrocarbons (PAHs), zinc and selenium, the values of the remaining parameters were considerably greater for the hard coal condensates. The studies revealed that all of the tested UCG condensates were extremely toxic to V. fischeri; however, the average toxicity level for the hard coal condensates was approximately 56% higher than that obtained for the lignite. The statistical analysis provided results supporting that the toxicity of the condensates was most positively correlated with the concentrations of free ammonia, phenols and certain heavy metals.
Keywords
Underground coal gasification; Condenser water; Groundwater pollution; Acute toxicity; Vibrio fischeri
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IRIS
•
Ammonia
Literature Search Update – Sept 2015 (private)
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Naphthalene
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Excluded - PECO criteria not met (TIAB)
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•
Naphthalene (2021 Evidence mapping publication)
Database Searches - Nov 2015 (private)
Previous HERO references
Database Searches
PubMed
WOS
Combined data set
Data set for title/abstract screening
Excluded – PECO criteria not met
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