改性累托石吸附水溶液中苯酚的研究I吸附条件的确定  

THE ADSORPTION OF MODIFIED RECTORITE FOR PHENOL FROM WATER I. Confirmation of Adsorptive Conditions

作　　者：黄韵[1] 马晓燕[1] 袁莉[1] 

机构地区：[1]西北工业大学化学工程系,西安710072

出　　处：《离子交换与吸附》2004年第5期464-469,共6页Ion Exchange and Adsorption

摘　　要：用十二烷基二甲基苄基氯化铵 (1227)、十六烷基三甲基溴化铵 (1631)、十八烷基三甲基溴化铵 (1831) 3种表面活性剂改性天然累托石 (REC) 粘土,分别得到3种有机改性累托石:1227-REC、1631-REC和1831-REC。用有机改性累托石作吸附剂,对水溶液中的苯酚进行吸附研究,考察了pH值、吸附时间、吸附剂用量、温度等因素对吸附效果的影响。结果发现,在本文研究条件下,3种吸附剂对苯酚达到较理想吸附效果的合理条件是:pH值分别为6、8、8;吸附平衡时间分别需要90、20、40min;吸附剂用量均为20g/L;常温。在确定的合理条件下,去除率分别能达到66.2%、99.0%、99.8%。The natural rectorite (REC) was modified with dodecyl benzyl dimethyl ammonium chloride (1227), hexadecyl trimethyl ammonium bromide (1631) and octadecyl trimethyl ammonium bromide (1831), respectively. Then we obtained three kinds of organic-modified rectorite: 1227-REC, 1631-REC, 1831-REC which were used as adsorbents for phenol from water. In the study, the effect of the pH value, the time of adsorption, the amount of adsorbent and the temperature on the adsorption efficiency was tested. The results demonstrated that, in the present study, three kinds of adsorptive action can carry out spontaneously, but the most proper adsorption conditions—the pH values were 6,8 and 8 respectively,the time 90min, 20min, 40min, the amount of adsorbents was equal, namely 20g/L, and the efficiency of phenol purified from water were 66.2%, 99.0% and 99.8%, respectively.

关 键 词：表面活性剂 改性累托石 苯酚 吸附条件 

分 类 号：TQ424.24[化学工程]