硫胺在水溶液中通过电离辐射降解:性能和机制
Bin Yao1, Tian Qin1, Caifeng Zhao2
1Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Environment and Ecology, Hunan Agricultural University, Changsha, 410128, China.
Environmental pollution (Barking, Essex : 1987)
|October 6, 2023
概括
马辐射有效地从废水中去除硫胺 (SA),其中基激素和水合电子作为关键剂. 这种电离辐射方法对SA治疗具有前景,特别是当与周期性治疗相结合时.
科学领域:
- 环境化学环境化学
- 水处理技术 水处理技术
- 放射化学 放射化学是指辐射化学.
背景情况:
- 硫胺 (SA) 是一种新出现的污染物,对废水处理构成挑战.
- 迫切需要有效的方法来从工业和城市废水中去除SA.
研究的目的:
- 使用玛辐射系统地研究硫胺 (SA) 的降解.
- 探索各种参数和共存物质对SA降解效率的影响.
- 提出降解途径并评估玛辐射与周期数据的联合效应.
主要方法:
- 在不同度和pH值下通过玛辐射对SA降解的系统研究.
- 灭实验以确定主导反应物种 (OH和e).
- 对共存物质效应的分析 (SO2-,Cl- ,CO2-,湿酸).
- 液体染色学-质谱学 (LC-MS) 和密度函数理论 (DFT) 用于路径分析.
- 评估马/周期数 (PI) 组合过程.
主要成果:
- 通过1.5kGy马辐射实现了10mg/LSA的完全去除.
- 酸盐的降解取决于pH值 (pH值较高时更快),并且取决于度.
- 硫酸盐和化物离子增强了降解,而碳酸盐抑制了降解;酸有轻微的影响.
- 马辐射降低了SA的毒性,但形成了一些更有毒的副产品.
- 玛/PI过程显著增强了SA降解 (1.85倍k值) 和矿化 (19.51%至79.19%).
结论:
- 玛辐射是一种有效的技术,可以从废水中去除硫胺.
- 玛/周期酸盐工艺提供了一种协同方法,用于增强SA降解和矿化.
- 电离辐射为处理SA污染水的矩阵提供了一个可行的解决方案.
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