颗粒活性炭吸附去除水中亚硝基二丙胺和亚硝基二丁胺的性能研究

Study on performance of granular activated carbon to remove nitrosodipropylamine and nitrosodibutylamine from water

采用颗粒活性炭(GAC)吸附技术,考察其对水中含氮消毒副产物亚硝基二丙胺(NDPA)和亚硝基二丁胺(NDBA)的去除性能。结果表明,GAC种类和初始溶液质量浓度均会大大影响GAC对NDPA和NDBA的去除效果,而pH则影响不明显。在48h内,质量浓度0.10g/L的椰壳活性炭在pH=7和T=298K条件下对混合溶液初始质量浓度为0.20mg/L的NDPA和NDBA去除率均大于90%,且吸附效果优于果壳活性炭和煤质活性炭。伪一级反应动力学模型和Langmuir模型均可较好地描述GAC同时吸附去除NDPA和NDBA的反应过程。

Laboratory scale studies were carried out to study the removal of nitrosodipropylamine（NDPA）and nitrosodibutylamine（NDBA）from water by granular activated carbon（GAC）.The results showed that the strong influence factors might be GAC types and initial solution concentration and the weak influence factors might be initial solution pH.Within 48 hours,the performance of cocoanut GAC was superior to that of nutshell GAC and coal-based GAC with the dosage of 0.10g/L,which means that the cocoanut GAC adsorbed more than 90%of 0.20mg/L NDPA and NDBA in the condition of pH was 7and the temperature was 298 K.The adsorption kinetics and isotherm patterns could be well described by apseudo first-order kinetics model and the Langmuir model.