水体中二甲胺的吸附与氧化降解

模拟二甲胺的水体污染,采用静态实验装置,从吸附的热力学和动力学方向,讨论活性炭对水体中二甲胺的降解情况;同时讨论了Fenton氧化-活性炭联合法降解二甲胺的效果。结果表明,活性炭吸附二甲胺是一个放热自发的过程,在常温下吸附符合Langmuir的吸附等温模型,吸附速率较慢,在90 min左右才能够达到吸附平衡,同时,溶液的pH值越大,活性炭对二甲胺的吸附作用越明显;而Fenton氧化-活性炭联合法对高浓度的二甲胺溶液降解效果明显,当按H2O2 2.4 mL/L,FeSO.47H2O 12 mg/L,活性炭0.2 g/L的比例投加药剂时,二甲胺的去除率在99%以上,溶液COD的去除率达到81.6%。

Dimethylamine in Water Adsorption and Oxidative Degradation

Simulation of water pollution dimethylamine,a static test apparatus was used to discuss the activated carbon on degradation of dimethylamine in water from the direction of the adsorption thermodynamics and kinetics and Fenton-activated carbon degradation of the effects of dimethylamine.Result indicated that activated carbon adsorption of dimethylamine is a spontaneous exothermic process and consistent with Langmuir’s adsorption isotherm model at room temperature.The adsorption rate is slow until about 90 minutes to reach the equilibrium.At the same time,the greater of the solution pH,the adsorption is more obivious.The degradation using Fenton-activated carbon method was significant for high concentration of dimethylamine solution.When the proportion of pharmaceutical dosage was dosinged by H2O2 2.4 mL/L,FeSO4·7H2O 12 mg/L,carbon 0.2g/L,the removal of dimethylamine in 99% and COD in 81.6% were reached.