垃圾渗滤液对新疆某地膨润土膨胀性能的影响

-13-第42卷第5期非金属矿Vol.42No.52019年9月Non-MetallicMinesSeptember,2019垃圾渗滤液对新疆某地膨润土膨胀性能的影响陈菲1管俊芳1,2*刘玉芹3郭争争1郑佳敏1郑长文1（1武汉理工大学资源与环境工程学院，湖北武汉430070；2矿物资源加工与环境湖北省重点实验室，湖北武汉430070；3中国非金属矿工业有限公司，北京100035）摘要研究垃圾渗透液对新疆某提纯膨润土膨胀指数的影响，并通过ICP、COD、FTIR和XRD分析膨胀指数变化机理。试验结果表明，经垃圾渗透液处理后，膨润土膨胀指数最低为5.5mL/g；垃圾渗透液ICP测试表明，Na、K、Ca、Mg、Fe、Zn、Cu元素含量从2399.40mg/L、1579.31mg/L、308.32mg/L、141.95mg/L、31.65mg/L、0.41mg/L、0.09mg/L分别降低至1553.02mg/L、1201.44mg/L、15.00mg/L、74.75mg/L、11.14mg/L、0.16mg/L、0.02mg/L；COD去除率达82.2%；FTIR测试表明，处理后H-O-H伸缩振动峰发生偏移，1429.19cm-1处出现氨基酸特征峰；XRD测试表明经膨润土处理后，垃圾渗透液中无机离子与有机物进入蒙脱石的层间域，使蒙脱石d001层间距增大。膨润土膨胀指数降低的主要原因是垃圾渗透液和膨润土中的蒙脱石矿物发生了相互作用。关键词膨润土；膨胀性能；膨胀指数；垃圾渗透液中图分类号：X703文献标志码：A文章编号：1000-8098(2019)05-0013-03InfluenceofLandfillLeachateonSwellingPropertiesofBentoniteinXinjiangChenFei1GuanJunfang1,2*LiuYuqin3GuoZhengzheng1ZhengJiamin1ZhengChangwen1(1SchoolofResourcesandEnvironmentalEngeering,WuhanUniversityofTechnology,Wuhan,Hubei430070;2HubeiKeyLaboratoryofMineralResourcesProcessingandEnvironment,Wuhan,Hubei430070;3ChinaNationalNon-metallicMineralsIndustrialCo.,Ltd.,Beijing100035)AbstractTheeffectoflandfillleachateontheswellingindexofbentoniteinXinjiang,andthemechanismofexpansionindexchangewasanalyzedbyICP,COD,FTIRandXRD.Thetestresultsshowedthatthebentoniteexpansionindexwas5.5mL/gaftertreatmentwithlandfillleachate;ICPtestoflandfillleachateshowedthatthecontentsofNa,K,Ca,Mg,Fe,ZnandCuwerefrom2399.40mg/L,1575.31mg/L,308.32mg/L,141.95mg/L,31.65mg/L,0.41mg/L,0.09mg/Ldecreasedto1553.02mg/L,1201.44mg/L,15.00mg/L,74.75mg/L,11.14mg/L,0.16mg/L,0.02mg/L;CODremovalratewas82.2%;FTIRtestshowedthattheH-O-Hstretchingvibrationpeakshiftedaftertreatment,andtheaminoacidcharacteristicpeakappearedat1429.19cm-1;XRDtestshowedafterthelandfillleachatebeingtreated,theinorganicionsandorganicmatterinthelandfillleachateenteredtheinterlayerdomainofthemontmorillonite,andthespacingofthesmectited001layerwasincreased.Theseindicatethatthemainreasonforthedecreaseintheswellingindexofbentoniteistheinteractionofthelandfillleachatean