地质聚合物基无机膜去除水中钙、镁离子的研究
发布时间：2019-01-07 11:47
【摘要】：以偏高岭土为前驱体材料,以改性水玻璃为碱激发剂,以去离子水为造孔剂,按照设计配比(n(SiO_2)/n(Na_2O)=1.3,n(Na_2O)/n(Al_2O_3)=0.8,n(SiO_2)/n(Al_2O_3)=2.96,n(H_2O)/n(Na_2O)=10~24)混合均匀后制得地质聚合物浆料,将浆料注模后于60℃条件下养护1d后脱模,并于常温下养护7d后得地质聚合物无机膜。利用SEM(扫描电镜)、比表面积与孔隙度测试仪、全自动孔径分析仪、电子万能试验机以及膜装置测试水通量等手段对膜材料进行表征,最终获得用于水处理无机膜的最优H_2O/Na_2O比为19。结果显示,该配比下制备的地质聚合物无机膜具有大的孔体积和比表面积,具有均匀的孔径分布、较高的气孔率和较好的力学强度,能够满足水处理的基本要求。将该地质聚合物无机膜应用于自来水中Ca~(2+)、Mg~(2+)的去除实验,结果表明钙镁离子截留率高,具有很好的实用价值。
[Abstract]:Using metakaolin as precursor, modified sodium silicate as alkali activator and deionized water as pore-forming agent, the ratio of (n (SiO_2 / n (Na_2O) = 1.3 Na_2O / n (Al_2O_3) = 0.8. The geopolymer slurry was prepared by mixing n (SiO_2) / n (Al_2O_3) = 2.96n (H _ s _ 2O) / n (Na_2O) = 10 ~ (24). The slurry was molded and cured at 60 鈩，
本文编号：2403625
[Abstract]:Using metakaolin as precursor, modified sodium silicate as alkali activator and deionized water as pore-forming agent, the ratio of (n (SiO_2 / n (Na_2O) = 1.3 Na_2O / n (Al_2O_3) = 0.8. The geopolymer slurry was prepared by mixing n (SiO_2) / n (Al_2O_3) = 2.96n (H _ s _ 2O) / n (Na_2O) = 10 ~ (24). The slurry was molded and cured at 60 鈩，
本文编号：2403625
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