| 有机膨润土多次吸附模拟废水中苯酚的性能及机理 |
| 摘要点击 1591 全文点击 2260 投稿时间：2000-10-25 |
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| 中文关键词 有机膨润土 苯酚 多次吸附 协同作用 废水处理 |
| 英文关键词 organobentonites phenol repetitious sorption synergic sorption wastewater treatment |
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| 中文摘要 |
| 研究了一系列有机膨润土多次吸附水中高浓度苯酚的性能及机理.结果表明,有机膨润土能够重复多次吸附水中苯酚,吸附性能较好.当多次吸附所用苯酚溶液初始浓度为1000mg/L时,3种单阳离子有机膨润土对其的吸附能力大小依次为:120 CTMAB-膨润土＞120 CPC-膨润土＞120 DTMAB-膨润土.在多次吸附过程中,有机膨润土对苯酚的吸附机理发生变化,由最初的表面吸附作用为主转变为分配作用为主.对CPC改性的膨润土而言,由于芳香性吡啶环的存在,苯酚被吸附到有机膨润土上后,能够产生"协同效应”,表现为随着苯酚吸附量的增大,分配系数Kp(cscw |
| 英文摘要 |
| The properties and mechanisms for repetitious sorption of phenol to organobentonites from water were studied. Results showed that organobentonites could be used to sorb phenol from water many times with high removal rates. The sorption capacities of three single cation organobentonites were 120 CTMAB bentonites > 120 CPC bentonites > 120 DTMAB bentonites, when the original concentration of phenol was 1000 mg/L. The sorption mechanisms changed from adsorption to partition in the process of repetitious sorption. Sorption of phenol to CPC bentonites could bring synergic sorption. The distribution coefficience (Kp) were related to the quantities of phenol on CPC bentonites, while the distribution coefficience of phenol on CTMABbentonites and DTMAB-bentonite were constant. |
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