高活性复合体的石和有机物调节的命运
Shuting Wang1, Jingyu Wen2, Li Mu2
1Tianjin Key Laboratory of Agro-Environment and Product Safety, Key Laboratory for Environmental Factors Controlling Agro-Product Quality Safety (Ministry of Agriculture and Rural Affairs), Institute of Agro-Environmental Protection, Ministry of Agriculture and Rural Affairs, 300191 Tianjin, China; Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China.
Journal of hazardous materials
|July 8, 2023
概括
矿物质和有机物质形成复合物,在阳光下增强氧化. 这一发现为控制污染提供了新的见解,通过将有毒转化为不那么有害的.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 摄影化学的使用.
背景情况:
- (As) 具有显著的毒性和致癌性风险,受其氧化状态和物种化的影响.
- 对矿物质和有机物质的吸附会影响其毒性和生物可用性.
- 同时存在的矿物质和有机物相互作用对的命运的影响尚不清楚.
研究的目的:
- 研究矿物有机物复合物的形成和性质.
- 确定这些复合物对物种的作用,特别是氧化.
- 阐明转化过程中涉及的化学机制.
主要方法:
- 在模拟的太阳辐射下形成甲酸胺 (AG) 复合体.
- 通过表面氧原子相互作用,电子转移和晶体表面分析来描述复杂的形成.
- 测量和捕获活性氧物种 (ROS),包括基基 (•OH),以确认它们在氧化中的作用.
主要成果:
- 与单独的pyrite相比,pyrite-AG复合物成功形成,呈现出增加的氧空缺,增强的ROS生成,以及优越的电子传输能力.
- 酸盐-AG复合物显著促进了有毒酸盐的光化学氧化,使其从有毒酸盐 (III) 转变为不那么有毒的酸盐 (V).
- 基基 (•OH) 被确定为关键的ROS,在酸盐-AG和酸盐-III系统中调解酸盐-III氧化.
结论:
- 矿物有机物复合物的形成,如酸盐-AG,可以有效地增强在辐射下氧化.
- 这些复合物的增强光化学特性,由ROS驱动,对于As (III) 排毒至关重要.
- 这些发现为的命运,风险评估和污染控制策略提供了新的视角.
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