活性焦理化特性对印染废水中有机物吸附特性的影响研究

Effect of the physical and chemical properties of activated coke on the adsorption characteristics of organic matter in printing and dyeing wastewater

为去除印染废水中的复杂有机物,采用活性焦作为吸附剂,考察了吸附作用对有机物种类和含量的影响,分析了活性焦的理化特性及其对吸附特性的影响。结果表明,活性焦吸附可将原水中的有机物(芳香烃及烷烃衍生物)含量由89.1%降至30.5%,活性炭吸附仅可将有机物含量降至87.7%。活性焦表面官能团对吸附特性影响较小,其种类、含量均与活性炭相近。发达的中孔结构对活性焦的吸附特性有重要影响,中孔比表面积达到114.111 m^(2)/g,占总比表面积的28.6%,是活性炭的2.7倍。

The activated coke(ACoke)was used as the adsorbent to remove the complex organic matter from the printing and dyeing wastewater.The change of organic matter species and concentrations before and after absorption was studied.Physicochemical properties of ACoke and its influence on adsorption characteristics were investigated.The results showed that the content of organics(aromatic hydrocarbons and alkane derivatives)decreased from 89.1%to 30.5%after absorption by ACoke.The content of organic matter only decreased from 89.1%to 87.7%after absorption by activated carbon(AC).Types and contents of surface functional groups of ACoke were similar to those of AC,and contributed indistinctively to the adsorption characteristics.The abundant mesoporous structure had a significant influence on the adsorption characteristics of ACoke.The specific surface area of mesoporous structure of ACoke was 114.111 m^(2)/g,which accounted for 28.6%of its total specific surface area and was 2.7 times that of AC.