通过自然酸激活硫酸系统有效地从真正的石油废水中去除纳夫酸

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Shuai Zhu¹, Zhuoyu Li¹, Meiqi Yu¹

¹State Key Laboratory of Heavy Oil Processing, China University of Petroleum-Beijing, Beijing, 102249, PR China.

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概括

一个具有成本效益的活化硫酸盐系统有效地从石油废水中去除有毒的酸盐. 这种天然矿物催化剂为工业废水处理提供了可持续的解决方案,显示出高效率和可重复使用性.

科学领域:

环境化学环境化学
水处理技术水处理技术

背景情况:

石油废水 (PWW) 含有持久性有机污染物,特别是有毒和反抗性纳夫酸 (NAs).
透硫酸盐 (PS) 氧化对耐火废水具有前景,但高催化剂成本阻碍了应用.

研究的目的:

开发一种具有成本效益的,天然的酸盐激活硫酸盐 (PS) 系统,用于PWW处理.
调查NAs的去除,并了解底层的降解机制.

主要方法:

利用天然矿作为PS激活的催化剂来降解循环赫萨诺酸 (CHA),一个模型NA.
进行了清理实验,以确定反应性物种和反应地点.
研究了常见离子 (Cl-, SO42-, NO3-, HCO3-) 对降解效率的影响.
分析PWW的组成和降解产品,使用里埃变换离子环子共振质谱法 (FT-ICR MS).

主要成果:

在广泛的pH范围 (3-11) 中,使用pyrite/PS系统实现了90%以上的CHA去除.
识别了矿上的Fe (II) 作为PS激活的活性位点,产生SO4•−,Fe (IV) 和OH基.
由于Fe (III) 被硫减少,在五个周期内证明了矿的持续催化活性.
发现Cl-,SO42-,NO3-的影响很小,但HCO3- (>1 mM) 的抑制显著.
成功处理了真实PWW,在去除HCO3后实现了>90%的CHA和71.3%的TOC去除.
FT-ICR MS分析显示,矿化和氧添加是NA和其他有机物种的主要降解途径.

结论:

天然矿是PWW处理中激活硫酸盐的具有成本效益和高效的催化剂.
化物/PS系统有效降解NA,并降低实际PWW的整体有机含量.
皮赖特的持续活动和系统的稳定性为工业废水整治提供了一个有希望的方法.

关键词:

在FT-ICR MS中使用.纳弗酸纳弗酸的含量过硫酸盐的氧化过程石油废水的废水是石油废水.皮里特矿是一种矿.

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