地聚物固化生活垃圾焚烧飞灰固化体抗氧化硫杆菌腐蚀性能的研究  

Research on Anti-Corrosion of Thiobacillus for the Geopolymer Solidification MSWI Fly Ash

作　　者：金漫彤[1] 孙鑫[1] 董海丽[1] 金赞芳[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,杭州310014

出　　处：《环境科学》2012年第9期3272-3278,共7页Environmental Science

基　　金：浙江省自然科学基金项目(Y4090575)

摘　　要：为了探讨地聚合物固化生活垃圾焚烧飞灰后形成的固化体抗强酸性微生物的侵蚀性能,模拟氧化硫杆菌的腐蚀过程,考察经氧化硫杆菌浸泡前后地聚物固化体质量、抗压强度、浸出浓度的变化.结果表明,地聚物固化体具有良好的抗氧化硫杆菌侵蚀能力:浸泡28 d后,质量损失<1%;抗压强度仍达到了21.88MPa,抗蚀系数在0.9以上;重金属Cr、Cu、Zn、Cd、Hg、Pb的最大浸出浓度仅为:107.7、22.71、39.18、0.56、34.84和3.03μg.L-1.并且重金属的浸出浓度随浸泡时间而降低,表明了地聚物具有良好的抗氧化硫杆菌腐蚀的性能.实验通过X-ray衍射(XRD)、傅立叶红外光谱(FTIR)、扫描电镜(SEM)的分析对地聚物固化体的微观结构进行了表征,并探讨了地聚物固化体抗酸腐蚀性能的机制.In order to discuss the anti-Thiobacillus corrosion performance of geopolymer solidification MSWI fly ash,the research simulated the Thiobacillus corrosion process by experiment,investigated the change of mass,compressive strength,leaching concentration.The results showed that geopolymer had a good anti-corrosion ability： weight loss within 1%,the compressive strength still reached 21.88 MPa after 28 days,the corrosion resistance coefficient was above 0.9.The maximum leaching concentration of Cr,Cu,Zn,Cd,Hg,Pb were 107.7 μg·L^-1,22.71 μg·L^-1,39.18 μg·L^-1,0.56 μg·L^-1,34.84 μg·L^-1and 3.03 μg·L^-1,respectively.And the leaching concentration of geopolymer reduced with the immersion time,showed a good anti-Thiobacillus corrosion performance.Through the X-ray diffraction,Fourier transform infrared spectroscopy,scanning electron microscope spectra of geopolymer,we investigated the microstructure and mechanism of geopolymer anti-corrosion.

关 键 词：地聚物 氧化硫杆菌 质量损失 抗压强度 浸出浓度 耐酸机制 

分 类 号：X705[环境科学与工程—环境工程]