The chemical structure characteristics of dissolved black carbon and their binding with phenanthrene

dBc公司 化学 化学结构 炭黑 分配系数 接受者 环境化学 猝灭(荧光) 有机化学 荧光 材料科学 天然橡胶 物理 光电子学 CMOS芯片 量子力学 凝聚态物理
作者
Quan Chen,Yuanming Ma,Jihong Dong,Ying Kong,Min Wu
出处
期刊:Chemosphere [Elsevier BV]
卷期号:291: 132747-132747 被引量:8
标识
DOI:10.1016/j.chemosphere.2021.132747
摘要

The elucidation of interactions between the dissolved black carbon (DBC) in biochar and hydrophobic organic contaminants (HOCs) is crucial for controlling the environmental behavior of HOCs. The complicated chemical structures of DBCs result in diverse interaction mechanisms between DBCs and HOCs, which were driven by different chemical structures in DBCs. In the present study, ten DBCs were extracted from rice straw and corncob biochars and their chemical structures were characterized and analyzed. The binding of phenanthrene (Phen) with DBC were studied through fluorescence quenching experiments. DBCs with low concentration (1 mg C/L) were found to complex with high amounts of Phen per unit mass. No significant difference was found in the amount of the bound Phen per unit amount of DBC when the concentration of DBC increased beyond >5 mg C/L. The dominant mechanisms involved in the binding of Phen by DBCs are speculated to be hydrophobic interactions, π-π electron donor-acceptor (EDA), and chemical partition, which was driven by the fatty carbon chain, aromatic rings, and quinone groups or ester groups, respectively. This study elucidates the interactions between DBC and Phen, which is of great significance for understanding the environmental behavior of HOCs.
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