環境化学

報文

石炭灰を用いたトリクロロエチレンの除去

錦織広昌, 長田紗里, 浜直久, 藤井恒男

2014 年 24 巻 2 号 p. 33-39
発行日: 2014年
公開日: 2014/12/25

DOIhttps://doi.org/10.5985/jec.24.33

ジャーナルフリー

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Coal fly ash was examined for the removal performance of trichloroethylene (TCE) from gas phase. The performance of coal fly ash was evaluated by gas chromatography in batch test and by FTIR spectroscopy in flow test compared to that of a clay mineral, allophane, and an activated carbon. The adsorption ability of the coal fly ash for TCE was significantly lower than that of the allophane and activated carbon due to its lower specific surface area. On the other hand, the TCE adsorption amount of the coal fly ash per its specific surface area was larger than that of the allophane and activated carbon. The coal fly ash is presumed to readily adsorb the TCE molecules because the Lewis acid sites on the calcium atoms in the coal fly ash strongly interact with the π electrons of the TCE double bond. The coal fly ash can be an excellent adsorbent when it consists of fine particles having a great amount of the Lewis acid sites on their surface.

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研究ノート

リン酸エステル系難燃剤の定量分析法の開発と国際相互検定研究による検証

松神秀徳, 戸舘侑孝, BRANDSMA Sicco H., LEONARDS Pim E.G., 滝上英孝

2014 年 24 巻 2 号 p. 41-49
発行日: 2014年
公開日: 2014/12/25

DOIhttps://doi.org/10.5985/jec.24.41

ジャーナルフリー

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Risk assessment for phosphate ester flame retardants (PFRs) based on the results of environmental analysis with accurate quantification values have been internationally required. However, it is not easy to accurately determine the concentrations of PFRs in the samples which contain complicated matrices. As the result of international interlaboratory study (ILS) on the analysis of PFRs in environmental and dust samples, ten key points on blank contamination and analytical performance were reported as the technical knowledge related to the quality assurance and quality control (QAQC) for the analysis of PFRs. Additionally, as the results of ILS and the examination of analytical method of PFRs in National Institute Environmental Studies (NIES) laboratory, three key points of technical knowledge on analytical performance which are the isomer-specific quantification of tris(2-chloroisopropyl) phosphate and tris(methyl phenyl) phosphate, the co-injection with polyethylene glycol, and the confirmation of analytical precision using environmental matrices, significantly progressed in QAQC for the analysis of PFRs.

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技術報告

液体クロマトグラフー質量分析による水環境中フラーレンの定量

小杉有希, 冨士栄聡子, 鈴木俊也, 保坂三継, 小縣昭夫, 中江大

2014 年 24 巻 2 号 p. 51-55
発行日: 2014年
公開日: 2014/12/25

DOIhttps://doi.org/10.5985/jec.24.51

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The analysis for fullerene (C60) in aquatic environment by LC/MS after the liquid-liquid extraction using hexane was established. The instrumental detection limit of C60 was 0.5 μg/L under this LC/MS conditions. As for liquid-liquid extraction, C60 was extracted at high extraction efficacy with hydrophobic solvents such as n-hexane, toluene, and benzene. On the other hand, solid phase extraction gave low extraction efficacy with any products investigated. The recovery rates of C60 in water samples by LC/MS after liquid-liquid extraction using n-hexan were 92-107% and the coefficients of variation were 4-13%. Preliminary examination of tap water of our institute and water samples from Tama-river basin did not detect C60 at the method detection limit of 1 ng/L.

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