摘要
通过磁性树脂预处理,来提高粉末活性炭（PAC）应对水源水中突发以卡马西平（CBZ）为代表的PPCPs类有机物污染风险的能力.结果显示,Freundlich吸附模型可以更好描述PAC对CBZ的吸附规律；假一级动力学对CBZ吸附动力学过程模拟结果良好,假二级动力学更适合模拟时间大于1h的吸附过程；200-300目PAC具有较大的吸附容量和较快的吸附速率；在模拟配水试验中,磁性树脂与PAC联用相比单独使用PAC时,DOC去除率提高了40.64%,UV254去除率提高了41.27%,CBZ去除率提高了14.72%.在去除水中有机污染物过程中,磁性树脂与PAC间存在协同作用,磁性树脂预处理强化了PAC对CBZ的去除效果.
Facing increasing PPCPs pollution in source water, carbamazepine （CBZ） as typical pollutant was studied to be removed by powdered activated carbon with magnetic resin pre-treatment. Freundlich model was more appropriate to describe the adsorption pattern of CBZ in aqueous solution. The adsorption kinetics of CBZ could be well described with pseudo-first-order kinetic equation, whereas pseudo-second-order kinetic equation was better for the description of the adsorption process more than 1h. 200-300mesh PAC showed the largest adsorption capacity and fastest adsorption speed to CBZ. In the study of simulated source water treatment, compared with using PAC alone, the combination of magnetic resin and PAC improved the removal efficiency of DOC by 40.64%, UV254by 41.27%, CBZ by 14.72%respectively. The results of this research indicate that there is a kind of cooperative effect between magnetic resin and PAC on removing organic pollutants in water, which results in the enhanced removal efficiency of CBZ by PAC adsorption with magnetic resin pre-treatment.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2014年第3期630-637,共8页
China Environmental Science
基金
国家科技重大专项(2012ZX07403-001)
国家自然科学基金(51178159)
关键词
粉末活性炭
卡马西平
磁性树脂
强化
powdered activated carbon
carbamazepine
magnetic resin
enhancement
