摘要
在开展4A沸石吸附—解吸模拟锰渣渗滤液中Mn2+实验的基础上,通过X射线衍射分析(XRD)和红外光谱分析(FTIR)研究了4A沸石吸附Mn2+的机制及其解吸行为。结果表明:4A沸石对模拟锰渣渗滤液中Mn2+的去除效率高达99.34%,吸附量最高可达92.84 mg/g,但化学解吸和化学—物理联合解吸对于沸石型离子交换吸附的解吸效果不佳,Mn2+解吸率均未超过1.6%。XRD和FTIR显示4A沸石对Mn2+的吸附机制主要为离子交换。
Abstract ：This paper discussed about the adsorption of Mn^2＋ from the simulated Mn residues leaching by using zeolite 4A. The adsorption mechanism and desorption activity were analyzed by XRD and FTIR. The results show that the removal rate of zeolite 4A was 99.34% and the highest adsorbance was 92.84 mg/g. However, the chemical solution desorption method and chemical solution assisted by ultrasonic wave desorption method had little impact on the desorption of zeolite 4A. The average desorption rate never reached 1.6%. The results of XRD and FTIR show that the adsorption mechanism of Mn^2＋ on zeolite 4A mainly depends on ion exchange.
出处
《中国锰业》
2014年第4期27-31,共5页
China Manganese Industry
基金
四川省科技创新苗子项目(13zd3132)
四川省教育厅青年基金(13ZB0183)
核废物与环境安全国防重点学科实验室开放基金(12zxnp03)
关键词
4A沸石
锰渣渗滤液
吸附
解吸
MN^2+
离子交换
Zeolite 4A
Manganese residues leaching
Adsorption
Desorption
Mn^2＋
Ion exchange
