热解温度和溶液pH值对单氧主导染料降解在生物炭活性氧硫酸盐工艺中的影响
Puthiya Veetil Nidheesh1, Sakshi2,3
1CSIR-National Environmental Engineering Research Institute, Nagpur, 440020, India. pv_nidheesh@neeri.res.in.
概括
生物炭有效地激活过氧硫酸盐,用于Rhodamine B染料的去除. 单片氧,一种非激进氧化剂,主导着这个过程,为染料污染减轻提供了一个有前途的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 水处理 处理水的方法
背景情况:
- 氧硫酸盐激活对于降解持久性有机污染物至关重要.
- 生物炭显示了作为有效催化剂的潜力,用于过氧硫酸盐激活.
- 了解生物炭特性和反应条件的影响对于优化污染物降解至关重要.
研究的目的:
- 研究生物炭热解温度对染料去除效率的影响.
- 评估pH在生物炭激活过氧化硫酸盐降解Rhodamine B.中的作用.
- 确定主要的活性氧物种和相关的激活机制.
主要方法:
- 生物炭是从子中生产的,其热解温度为350°C,500°C和650°C.
- 罗达胺B降解在pH3,6和9时使用生物炭激活的过氧硫酸盐进行了研究.
- 分析了氧化物种和激活途径,重点关注单片氧和基质物种.
主要成果:
- 在所有测试条件下,在60分钟内实现了完整的罗达胺B去除.
- 单片氧被确定为主要的氧化剂,通过电子受体通路产生.
- 在pH值9和在500°C产生生物炭时观察到更高的单点氧生成,对染料降解有59%的贡献.
结论:
- 生物炭激活过氧硫酸盐有效降解罗达胺B,单片氧是关键的非激进氧化剂.
- 热解温度和pH值影响单点氧气生成,尽管整体染料去除仍然很高.
- 这种非激进的降解途径为减轻染料污染提供了一种可持续的方法.
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