摘要
高氯酸盐是一种新型的持久性水污染物,在世界各地的地下水中普遍存在。以活性炭纤维(ACF)作为载体,考察几种不同的季铵盐表面活性剂作为改性剂负载的吸附效果。通过吸附性能的比较,发现十六烷基三甲基氯化铵(CTAC)作为改性剂用于吸附高氯酸根离子具有优异的效果。吸附试验用于考察CTAC-ACF对高氯酸盐的吸附机理和吸附效果,结果表明该吸附过程复合Langmuir吸附等温线,CTAC-ACF对高氯酸盐的吸附效果随接触时间和温度的增加而提升,该吸附剂在60℃时饱和吸附量可达到55.257mg/g。
Perchlorate is an emerging persistent water pollutant which can be detected in groundwater universally. In this study, acti- vated carbon fiber （ACF） coated with different quaternary ammonium salt surfactants was synthesized to uptake perchlorate from water. Cetyltrimethylammonium chloride （CTAC）modification greatly improved the adsorption capacity on aqueous perchlorate, suggesting CTAC is an excellent modifier for ACF. Batch experiments were performed to investigate the mechanism of perchlorate adsorption onto CTAC-ACF. The results showed that the perchlorate adsorption process followed the Langmuir isotherm. Perchlo- rate adsorption onto CTAC-ACF was enhanced as contact time, and solution temperature increased. The CTAC-ACF adsorbent showed a relatively high saturated adsorption capacity of 55. 257 mg/g at 60 ℃.
出处
《中国农村水利水电》
北大核心
2016年第8期171-174,179,共5页
China Rural Water and Hydropower
关键词
季铵盐表面活性剂
十六烷基三甲基氯化铵
活性炭纤维
高氯酸盐
quaternary ammonium salt surfactants
cetyltrimethylammonium chloride
activated carbon fiber
perchlorate
