Relationship between Molecular Components and Reducing Capacities of Humic Substances

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Relationship between Molecular Components and Reducing Capacities of Humic Substances
	Lv, Jitao; Cao, Dong; Han, Ruixia; Huang, Zaoquan; Zhang, Shuzhen; Luo, Lei
刊名	ACS EARTH AND SPACE CHEMISTRY
	2018-04-01
卷号	2 期号:4 页码:330-339
关键词	humic electron donating capacity reducing capacity phenol FT-ICR-MS
ISSN号	2472-3452
文献子类	Article
英文摘要	Humic substances (HSs) are collections of diverse organic compounds with broad redox capacities, which directly or indirectly affect the biogeochemical behaviors and fates of almost all the pollutants in the environment. The present study investigates the relationships between the molecular characteristics of HSs and their reducing capacities or electron-donating capacities (EDCs) by electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), total phenolic assay, and mediated electrochemical oxidation analysis. For decreasing the molecular heterogeneity of bulk HSs, HSs were first separated into three fractions according to their polarities. The results demonstrated that compounds in HS fractions with moderate polarity possessed a high content of total phenols and consistently had high EDCs. A strong linear correlation (R-2 = 0.97) existed between EDCs and the total phenolic content, which confirmed that phenols contributed to the EDCs of HSs. Further analysis of molecular components confirmed that polyphenol-like compounds with medium oxygen content were the major moieties acting as electron donors in HSs. This study provides a linkage between the molecular components of HSs and their EDCs, which will help us to understand the molecular-dependent reducing properties of HSs or other dissolved organic matters under oxic conditions.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41030]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Lv, Jitao,Cao, Dong,Han, Ruixia,et al. Relationship between Molecular Components and Reducing Capacities of Humic Substances[J]. ACS EARTH AND SPACE CHEMISTRY,2018,2(4):330-339.
APA	Lv, Jitao,Cao, Dong,Han, Ruixia,Huang, Zaoquan,Zhang, Shuzhen,&Luo, Lei.(2018).Relationship between Molecular Components and Reducing Capacities of Humic Substances.ACS EARTH AND SPACE CHEMISTRY,2(4),330-339.
MLA	Lv, Jitao,et al."Relationship between Molecular Components and Reducing Capacities of Humic Substances".ACS EARTH AND SPACE CHEMISTRY 2.4(2018):330-339.