NDLI: Impact of kerogen heterogeneity on sorption of organic pollutants. 1. Sorbent characterization.

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Impact of kerogen heterogeneity on sorption of organic pollutants. 1. Sorbent characterization.

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Impact of kerogen heterogeneity on sorption of organic pollutants. 1. Sorbent characterization.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Yang, Chen Huang, Weilin Fu, Jiamo Dang, Zhi
Description	Country affiliation: China Author Affiliation: Yang C ( School of Environmental Science and Engineering, South China University of Technology, University Town, Guangzhou 510006, China. cyanggz@scut.edu.cn)
Abstract	The overall goal of the present study was to establish correlations between organic pollutant sorption and physicochemical properties of kerogen materials. Three coal samples, each representing a typical kerogen type, were used as the starting materials. A thermal technique was employed to treat the kerogen materials under seven different temperatures ranging from 200 to 500 degrees C to simulate different diagenetic history. These samples were systematically characterized for their chemical compositions, functionalities, physical rigidity, and optical properties. The results showed that the chemical, spectroscopic, and optical microscopic properties of each kerogen series changed consistently as a function of treatment temperature or kerogen maturation. The oxygen-to-carbon atomic ratio decreased from 0.29, 0.12, and 0.07 for the original lignite (XF0), fusinite (HZ0), and lopinite (LP0) samples, respectively, to 0.07, 0.06, and 0.04 for XF7, HZ7, and LP7, respectively, that underwent the highest temperature treatment. The hydrogen-to-carbon atomic ratio exhibited similar reducing trend, which is consistent with the aromaticity increasing from 45 to 58% of the original samples to 76 to 81% of highly mature samples. Under the fluorescence microscope, the organic matrix changed from yellow (original lignite sample) and red-brown (original lopinite sample) to colorless for the samples of higher maturation. The measured reflecting index increased from the original samples to the highly mature samples. Moreover, the original and the slightly matured samples exhibited very different chemical compositions and structural units among the three types due to the difference in their source materials. As the kerogen maturation increased, such differences decreased, indicating highly mature kerogen became homogenized regardless of the source material.
File Format	HTM / HTML
ISSN	07307268
Issue Number	8
Journal	Environmental Toxicology and Chemistry
Volume Number	28
e-ISSN	15528618
Language	English
Publisher	Wiley
Publisher Date	2009-08-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, U.s. Gov't, Non-p.h.s. Soil Pollutants Research Support, Non-u.s. Gov't Chemistry Adsorption Organic Chemicals Discipline Environmental Health Analysis Coal Discipline Toxicology Discipline Chemistry Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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