| 水蒸气对高岭土高温吸附铅的影响 |
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| 引用本文： | 水蒸气对高岭土高温吸附铅的影响.水蒸气对高岭土高温吸附铅的影响[J].燃料化学学报,2003,48(11):1327-1334. |
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| 作者姓名： | 水蒸气对高岭土高温吸附铅的影响 |
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| 作者单位： | 1. Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
2. Hefei Cement Research & Design Institute Corporation Ltd., Hefei 230051, China;
3. Jiangsu Shiqing Environmental Technology Co., Ltd., Nanjing 210012, China;
4. Everbright Ecological Environment Design and Research Institute Co., Ltd., Nanjing 211100, China |
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| 基金项目： | 国家重点研发计划（2018YFB0605102），国家自然科学基金（51706106）和江苏省重点研发计划（SBE2019740303）资助 |
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| 摘 要： | 使用沉降炉开展了水蒸气对高岭土高温吸附铅影响的实验研究，其中铅的形态为PbO和PbCl2两种。首先研究了0-20%水蒸气对高岭土吸附PbO（1100-1300 ℃）和PbCl2（800-1300 ℃）的影响规律，然后基于XRD、SEM和残余羟基率等分析，掌握了水蒸气影响高岭土高温吸附的机理。结果表明，水蒸气可以减少高岭土表面羟基的高温脱落，从而阻碍了PbO吸附、促进了PbCl2吸附。综合高温下惰性莫来石的出现和高岭土孔隙结构的坍塌等因素，PbO和PbCl2的最佳吸附温度分别为1200和1000 ℃。
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| 关 键 词： | 高岭土 铅 吸附 高温 水蒸气 |
| 收稿时间： | 2020-09-11 |
Effect of water vapor on lead adsorption by kaolinite at high temperatures |
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| CHENG Yun,Lü Wen-ting,JIA Ji-qiang,ZHANG Ji-dong,BU Chang-sheng,ZHANG Ju-bing,WANG Xin-ye.Effect of water vapor on lead adsorption by kaolinite at high temperatures[J].Journal of Fuel Chemistry and Technology,2003,48(11):1327-1334. |
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| Authors: | CHENG Yun Lü Wen-ting JIA Ji-qiang ZHANG Ji-dong BU Chang-sheng ZHANG Ju-bing WANG Xin-ye |
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| Abstract: | The effect of water vapor on lead adsorption by kaolinite at high temperatures was studied using a drop tube furnace. The lead was in the forms of PbO and PbCl2. Firstly, effect of 0-20% water vapor was studied on adsorption of PbO (1100-1300 ℃) and PbCl2 (800-1300 ℃) by kaolinite. Then, mechanism of high-temperature adsorption of kaolin was revealed according to the analysis of XRD, SEM and residual hydroxyl group fraction. The results showed that water vapor reduced the loss of hydroxyl groups on kaolinite surface at high temperatures, hindering PbO adsorption and promoting PbCl2 adsorption. At the same time, due to production of inert mullite and collapse of pore structure of kaolinite at high temperatures, the optimal adsorption temperatures of PbO and PbCl2 were 1200 and 1000 ℃, respectively. |
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| Keywords: | kaolinite lead adsorption high temperature water vapor |
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