论文部分内容阅读
目的探讨甲醛水溶液电子束辐解效果。方法观察了不同浓度(25、500、11 000 mg/L)甲醛水溶液电子束辐解的效果和表观动力学过程,并考察了添加强碱强酸对甲醛水溶液电子束辐解效率的影响。结果甲醛水溶液电子束辐解过程基本符合准一级动力学形式,且甲醛初始浓度越大,其表观动力学常数越小;添加NaOH后,甲醛初始浓度越大其辐解效率却越高;而添加H2SO4则对任何初始浓度的甲醛水溶液辐解均无明显影响。结论电子束辐射能在不添加助剂条件下有效辐解低于500 mg/L甲醛溶液,对更高浓度甲醛溶液则需添加NaOH来增强辐解效率。
Objective To investigate the effect of electron beam radiation of formaldehyde aqueous solution. Methods The effect of electron beam irradiation and apparent kinetics on the concentration of 25,500 and 11 000 mg / L of formaldehyde in aqueous solution were observed. The effect of adding strong alkaline acid on the electron beam irradiation efficiency of formaldehyde aqueous solution was also investigated. Results The electron beam irradiation of formalin solution was basically in the form of quasi-first-order kinetics. The larger the initial concentration of formaldehyde, the smaller the apparent kinetic constant. The higher the initial concentration of formaldehyde was, the higher the radiolysis efficiency was. The addition of H2SO4 had no significant effect on the radiolysis of any initial concentration formaldehyde solution. Conclusions E-beam irradiation can effectively radiate formaldehyde solution below 500 mg / L without adding auxiliaries, and NaOH can be added to higher concentration formaldehyde solution to enhance radiolysis efficiency.