He Qing, Pang Kun, Tian Lin, Ma Yiqian, Guo Xiang, Zhang Jianyong, Yu Ming
School of Pharmacy, Zunyi Medical University, Zunyi 563000, China.
Guizhou Institute of Products Quality Inspection & Testing, Guiyang 550025, China.
ACS Omega. 2024 Nov 1;9(45):44931-44941. doi: 10.1021/acsomega.4c03269. eCollection 2024 Nov 12.
Melamine-derived mesoporous carbon, which was obtained from pyrolysis of modified melamine, was employed for the purpose of eliminating trace amounts of Hg(II) from honeysuckle decoction. The specific surface area of the mesoporous carbons with N-functional (MCN) was 648.372 m·g. The chemical composition and morphology of MCN were thoroughly examined, and a comprehensive analysis led to the identification of its formation mechanism. A noteworthy association has been identified between the adsorption efficacy and the chemical composition of MCN. In the elimination of trace mercury in aqueous solutions over a broad pH range (pH 2-9), MCN demonstrates high effectiveness, approaching 100%. Adsorption kinetics and isotherm results indicate that a more accurate representation of Hg(II) adsorption on MCN is provided by pseudo-second-order kinetics and Freundlich models, with chemical adsorption being the dominant mechanism. This study further examined the removal of chlorogenic acid, a bioactive component, by MCN. The findings imply that MCN has a noteworthy 80% efficacy in removing mercury from honeysuckle decoction while maintaining the purity of its medicinal ingredients, particularly chlorogenic acid. As a result, utilizing MCN for the adsorption of Hg(II) in honeysuckle decoction appears to be a reasonable approach.
三聚氰胺衍生的介孔碳由改性三聚氰胺热解制得，用于去除金银花汤剂中的痕量汞（II）。含氮官能团的介孔碳（MCN）的比表面积为648.372 m²/g。对MCN的化学成分和形态进行了全面研究，并通过综合分析确定了其形成机制。已确定MCN的吸附效果与其化学成分之间存在显著关联。在较宽的pH范围（pH 2 - 9）内去除水溶液中的痕量汞时，MCN表现出高效性，去除率接近100%。吸附动力学和等温线结果表明，伪二级动力学和Freundlich模型能更准确地描述Hg（II）在MCN上的吸附情况，化学吸附为主要机制。本研究进一步考察了MCN对生物活性成分绿原酸的去除情况。研究结果表明，MCN在去除金银花汤剂中汞的同时，能有效保持其药用成分的纯度，尤其是绿原酸，去除率达80%，效果显著。因此，利用MCN吸附金银花汤剂中的Hg（II）似乎是一种合理的方法。
