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用粉状活性炭去除微囊的过程依赖于变异性质,碳性质和溶解的有机物质

Yuzhou Huang¹, John J Lenhart²

¹Environmental Science Graduate Program, The Ohio State University, USA; Department of Civil, Environmental and Geodetic Engineering, The Ohio State University, USA.

|January 14, 2024

概括

粉末活性炭 (PAC) 的特性在水处理过程中显著影响毒素的去除. 对于有效的微囊素吸附,PAC特性比毒素类型或溶解有机物更为关键.

科学领域:

环境科学环境科学
水处理技术水处理技术
分析化学分析化学

背景情况:

有害的藻类繁殖产生微囊 (MCs),强大的毒素污染水源.
粉末活性炭 (PAC) 是水处理厂用于去除MC的关键吸附剂.
移除MC的效率受到PAC类型,MC变异性质和溶解有机物 (DOM) 的影响.

研究的目的:

为了确定PAC属性的相对重要性,MC变体特征,以及MC去除效率上的DOM.
为了比较四种MC变体在不同的DOM条件下通过三种PAC类型的吸附.

主要方法:

吸附实验是在72小时内进行的,使用了三种PAC类型 (木基,煤混合,煤基) 和四种MC变种 (MC-LR,MC-LA,MC-RR,脱甲基MC-RR).
使用孤立的陆地DOM (SRFA) 和微生物DOM (GLSM) 来评估DOM的影响.
分析了PAC特性 (表面积,中孔体积) 和MC变体特性 (电荷,疏水性).

主要成果:

基于木材的PAC表现出所有MC变体中最高的吸附率和容量,这是由于其优越的表面积和中孔体积.
与所有PAC类型的其他变体相比,中性充电的MC-RR显示出更快,更大的吸附率.
负电荷的MC-LR和MC-LA被吸附效率最低,尽管它们具有疏水性.
DOM抑制了MC吸附,但对于两个DOM源的抑制程度是相似的,这表明DOM特性对PAC或MC特性的影响较小.

结论:

在水处理中,PAC特性是影响微囊去除效率的最关键因素.
虽然MC变体属性起到作用,但它们与PAC特征相比是次要的.
与PAC和MC属性相比,溶解有机物对MC吸附的影响较小.

关键词:

吸附方式吸附方式吸附方式在DOM DOM中,我们可以看到DOM DOM.动力学动力学动力学梅索波尔是一种中层.微囊是一种微囊.这就是为什么PAC PAC PAC.

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