| 巯基功能化沸石吸附Hg2+特征及固化/稳定化含汞废物研究 |
| |
| 引用本文： | 张新艳,王起超,张少庆,孙晓静,张仲胜.巯基功能化沸石吸附Hg2+特征及固化/稳定化含汞废物研究[J].环境科学学报,2009,29(10):2134-2140. |
| |
| 作者姓名： | 张新艳 王起超 张少庆 孙晓静 张仲胜 |
| |
| 作者单位： | 1. 中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,长春,130012
2. 中国科学院湿地生态与环境重点实验室,中国科学院东北地理与农业生态研究所,长春,130012;吉林农业大学资源与环境学院,长春,130118 |
| |
| 基金项目： | 中国科学院知识创新工程重要方向项目（No.KZCX3-SW-437） |
| |
| 摘 要： | 采用3-巯基丙基三甲氧基硅烷在天然斜发沸石表面进行自组装巯基改性，制得巯基功能化沸石.研究了吸附剂用量、pH值、温度、Hg2+浓度和吸附时间对巯基功能化沸石吸附Hg2+的影响，测定了巯基含量，并进一步研究了吸附机理.同时，探讨了巯基功能化沸石吸附剂作为稳定化剂固化/稳定化含汞危险废物的可行性.结果表明，巯基功能化沸石具有较高的巯基含量（1.91%±0.01%），对Hg2+的吸附容量为87.72 mg·g-1，比天然沸石对Hg2+的吸附容量（8.06 mg·g-1）提高了近10倍.巯基功能化沸石吸附Hg2+的机制主要是表面的巯基与Hg2+的反应，其受pH值、温度的影响小于天然沸石.动力学实验结果表明，巯基功能化沸石吸附Hg2+以较快的速率进行，3h时基本达到吸附平衡.巯基功能化沸石做稳定化剂能够促进汞的稳定，与单独使用水泥相比固化体浸出汞浓度显著降低，含汞1000 mg·kg-1的模拟废物固化体浸出汞浓度低于国家标准.
|
| 关 键 词： | 巯基 功能化沸石 Hg2+ 吸附机理 固化 稳定化 |
| 收稿时间： | 2/6/2009 4:15:23 PM |
| 修稿时间： | 4/20/2009 4:00:12 PM |
Characteristics of mercury sorption and stabilization/solidification of mercury-contaminated hazardous wastes by thiol-functionalized zeolites |
| |
| ZHANG Xinyan,WANG Qichao,ZHANG Shaoqing,SUN Xiaojing and ZHANG Zhongsheng.Characteristics of mercury sorption and stabilization/solidification of mercury-contaminated hazardous wastes by thiol-functionalized zeolites[J].Acta Scientiae Circumstantiae,2009,29(10):2134-2140. |
| |
| Authors: | ZHANG Xinyan WANG Qichao ZHANG Shaoqing SUN Xiaojing and ZHANG Zhongsheng |
| |
| Institution: | Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012,Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012,1. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012; 2. School of Resources and Environment, Jilin Agricultural University, Changchun 130118,Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012 and Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012 |
| |
| Abstract: | |
| |
| Keywords: | thiol group thiol-functionalized zeolites Hg2+ adsorption mechanism solidification stabilization |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报》浏览原始摘要信息 |
| 点击此处可从《环境科学学报》下载免费的PDF全文 |
|
