煅烧温度对4A分子筛/凹土材料结构及性能影响  

Effect of Calcination Temperature on the Character of 4A Molecular Sieve/Attapulgite Composite and Its Adsorption

作　　者：方月梅 杨恩 范先媛[3] 刘红[3] Fang Yuemei1, Yang En2, Fan Xianyuan3, Liu Hong3(1. College of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi, Hubei 435003; 2. Department of Soil and Water Conservation, Yangtze River Scientifc Research Institute, Wuhan, Hubei 430010; 3. School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 43008)

机构地区：[1]湖北理工学院环境科学与工程学院,湖北黄石435003 [2]长江科学院水土保持所,湖北武汉430010 [3]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《非金属矿》2018年第3期7-10,共4页Non-Metallic Mines

基　　金：国家自然科学基金(50904047);湖北省教育厅科研计划项目(D20154402);矿区环境污染控制与修复湖北省重点实验室开放研究基金课题(2014107);湖北理工学院校级重点科研项目(13xjz02A)

摘　　要：将4A分子筛和凹凸棒土复合制成颗粒,经高温煅烧得到4A分子筛/凹凸棒土复合材料。通过X射线衍射、扫面电镜和比表面积等测试表征手段,研究了煅烧温度对复合材料晶体形貌、孔结构特性和吸附性能的影响。结果表明:随着煅烧温度的升高,孔径和抗压强度逐渐变大,但比表面积、孔容量和交换阳离子的能力减小,微观形貌发生显著变化;复合材料吸附Cd(Ⅱ)的性能也随之降低;从去除Cd(Ⅱ)效果来看,合适的煅烧温度应不高于500℃;综合考虑材料强度和吸附性能,4A分子筛/凹土材料最佳煅烧温度为600℃。4 A molecular sieve/attapulgite composites were made at different calcination temperature. The effects of calcination temperature on the morphology, pore structure and adsorption properties of composite materials was characterized via XRD, BET and SEM, respectively.The results showed that with the increase of calcination temperature, the pore diameter and compressive strength gradually increased, but the surface area, pore volume and exchange cation capacity decreased, and the microtopography changed significantly. The Cd（Ⅱ） adsorption performance of composite also decreases. From the point of Cd（Ⅱ） removal of effect, suitable calcination temperature should be no higher than 500 ℃. Comprehensive consideration of material strength and adsorption performance, the optimum calcination temperature was 600 ℃.

关 键 词：4A分子筛 凹凸棒土 煅烧温度 吸附 

分 类 号：TQ424[化学工程]