Mutagenicity of eluent by hot water extraction of various coals: Effect of chlorination

被引：7

作者：

Nakajima, Tsunenori ^{[1
]}

Hasegawa, Hiroyuki ^{[1
]}

Nakamata, Satomi ^{[1
]}

Takanashi, Hirokazu ^{[1
]}

Ohki, Akira ^{[1
]}

机构：

[1] Kagoshima Univ, Fac Engn, Dept Bioengn, Kagoshima 8900065, Japan

来源：

FUEL | 2008年 / 87卷 / 13-14期

关键词：

coal; water-soluble organic matter; humic substances; mutagenicity; chlorination;

D O I：

10.1016/j.fuel.2008.04.014

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Six kinds of powdery coals (two bituminous coals, two sub-bituminous coals, and two lignites) were extracted by hot water, and the eluents obtained were analyzed for total organic carbon (TOC), absorbance at 260 nm (A(260)), and pH. The TOC in the eluents decreased in the order, lignites > sub-bituminous coals > bituminous coals. The eluents of lignite gave high A(260)/TOC values and fairly low pH compared to other coals. Chemical structure of the organic matter eluted from coals was discussed with the aid of FTIR analysis. The coal eluents were analyzed by the Ames mutagenicity assay using Salmonella typhimurium TA100 and TA98 strains, and no mutagenicity was observed for all of the six coals. However, especially for the lignites, chlorination of the eluents produced an appreciable mutagenicity, and the expression of mutagenicity was dependent upon the type of coal. The mutagenicity was extinguished when metabolic activation (rat liver homogenate, +S9) was applied. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：3132 / 3136

页数：5

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