数字农科院2.0

Oxygen-defective graphdiyne for ultra-efficient removal of sulfonylurea herbicides from aqueous solution

文献类型： 外文期刊

作者： Jianhui Zhu;Sheng Xiang;Bingjie Zhang;Jianli Wang;Changsheng Li;Canping Pan;Yong Xu;Yongqiang Ma

作者机构：

关键词： Adsorption;Graphdiyne;Modelling;Sulfonylurea herbicides;Water purification

期刊名称： Journal of Environmental Chemical Engineering

ISSN： 2213-3437

年卷期： 2022 年 10 卷 3 期

页码：

摘要： The irrational use of sulfonylurea herbicides (SUHs) has brought many environmental problems due to their long-term residue and toxicity on non-target organisms. In this study, oxygen-defective graphdiyne (GDY) was applied as an adsorption material to remove pesticides from water for the first time under various conditions and exhibited remarkable adsorption properties for seven SUHs. The maximum adsorption capacity of GDY reached up to 795.51 mg/g for iodosulfuron-methyl sodium, which was over 130 times higher than that of modified graphene oxide (6 mg/g) and modified biochar (1.5 mg/g) reported by others. Additionally, the pseudo-second-order kinetic model and Langmuir isotherm model were well fitted for the experimental data. The thermodynamic results revealed that the adsorption process was physical, spontaneous and endothermic in nature. Further studies verified that π-πinteraction, hydrophobic interaction and hydrogen bonding played an important role in SUHs adsorption on GDY. This work clarifies that oxygen-defective GDY is an ultra-efficient, sustainable and anti-interference adsorbent for the removal of SUHs from aqueous solution.

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