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首页> 外文期刊>Environmental Science & Technology >Abundance and Light Absorption Properties of Brown Carbon Emitted from Residential Coal Combustion in China
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Abundance and Light Absorption Properties of Brown Carbon Emitted from Residential Coal Combustion in China

机译：中国居民燃煤产生的褐碳的丰度和光吸收特性

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摘要

Brown carbon (BrC) fractions, including water-soluble organic carbon (WSOC), water-soluble humic-like substances (HULISw), alkaline soluble organic carbon (ASOC), and methanol soluble organic carbon (MSOC) were extracted from particles emitted from the residential combustion of coal with different geological maturities. The abundances and light absorption properties of these BrC fractions were comprehensively studied. The results showed that the abundances of the different constituents of the BrC fraction varied greatly with the extraction solvent, accounting for 4.3%-46%, 2.3%-23%, 3.2%-14%, and 76%-98% of the total carbon content in particles. The specific UV-vis absorbance (SUVA(254)) of BrC fractions followed the order of MSOC ASOC HULISw WSOC. The WSOC and MSOC fractions from the combustion of low maturity coal had relatively low SUVA(254) and high S-R values. The mass absorption efficiencies (MAE(365)) for ASOC and MSOC were higher than for WSOC, and WSOC and MSOC from low maturity coal combustion had relatively low levels of light absorption. These findings indicated that coal combustion is a potential source of atmospheric BrC and the abundance and light absorption of the coal combustion-derived BrC fractions were strongly dependent on the extraction methods used and the coal maturity rather than the coal shapes.
机译：从二氧化碳排放的颗粒中提取了棕色碳（BrC）馏分，包括水溶性有机碳（WSOC），水溶性腐殖样物质（HULISw），碱性可溶性有机碳（ASOC）和甲醇可溶性有机碳（MSOC）。具有不同地质成熟度的煤炭的住宅燃烧。对这些BrC馏分的丰度和光吸收特性进行了综合研究。结果表明，BrC馏分中不同组分的丰度随萃取溶剂的不同而有很大差异，分别占总含量的4.3％-46％，2.3％-23％，3.2％-14％和76％-98％。颗粒中的碳含量。 BrC馏分的特定UV-vis吸光度（SUVA（254））遵循MSOC> ASOC> HULISw> WSOC的顺序。低成熟度煤燃烧产生的WSOC和MSOC馏分具有相对较低的SUVA（254）和较高的S-R值。 ASOC和MSOC的质量吸收效率（MAE（365））高于WSOC，而来自低成熟度煤燃烧的WSOC和MSOC的吸光度相对较低。这些发现表明，煤燃烧是大气中BrC的潜在来源，并且源自煤燃烧的BrC馏分的丰度和光吸收在很大程度上取决于所使用的提取方法和煤的成熟度，而不是煤的形状。

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  • 来源
    《Environmental Science & Technology》 |2019年第2期|595-603|共9页
  • 作者

    Li Meiju; Fan Xingjun; Zhu Mengbo; Zou Chunlin; Song Jianzhong; Wei Siye; Jia Wanglu; Peng Pingan;

  • 作者单位

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Anhui Sci & Technol Univ, Coll Resource & Environm, Huainan 233100, Anhui, Peoples R China|Anhui Prov Key Lab Biochar & Cropland Pollut Pre, Bengbu 233400, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China|Minist Environm Protect, South China Inst Environm Sci, Guangzhou 510655, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China;

    Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China|Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resourc, Guangzhou 510640, Guangdong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

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