烷基糖苷在土壤上的吸附特征研究
首发时间:2016-03-04
摘要:使用恒温振荡平衡法批量实验研究了非离子表面活性剂烷基糖苷(APG1214)在氧化物、粘土矿物和砖红壤上的吸附特性。结果表明,APG1214除了在SiO2和Al2O3上的吸附等温线为线性外,在Fe2O3、粘土矿物和砖红壤上的吸附等温线都为"L"型,且均可用Freundlich和Langmuir方程拟合,由相关性系数知,更符合Langmuir方程。APG1214在氧化物上的吸附量大小顺序为Fe2O3> SiO2> Al2O3。在粘土矿物上的吸附量大小顺序为蒙脱石>伊利石>高岭石,由表面元素Si:Al的比率不同导致。在忽略土壤有机质对吸附的影响时,APG1214在土壤上的吸附量随着土壤表面元素(Si+Fe):Al的增加而增加。因此在使用APG时,考虑土壤的矿物质组成是非常重要的。
关键词: 吸附 烷基糖苷 吸附等温线 土壤有机质 矿物 修复
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The Research of Adsorption Characteristics of Green Surfactant Alkyl Polyglucoside on Soil
Abstract:Batch experiments were estimate APG1214 sorption by oxides, aluminosilicates, and soil. Results show that SiO2 and Al2O3 adsorption isotherm are fit for linear;Fe2O3, clay mineral and laterite adsorption isotherm are fit for "L"model, and are available Langmuir and Freundlich equation fitted. Because of the value of the correlation coefficient, The Langmuir equation is good more. The order of adsorption amount of APG1214 on oxide is Fe2O3 > SiO2 > Al2O3. In clay mineral is montmorillonite > illite > kaolinite, it causes by the different of surface element Si: Al ratio. While ignored the effect of soil organic matter, adsorption amount of APG1214 on soil increase with soil surface elements (Si + Fe):Al radio increase. The results above indicated that the mineral composition of soil is important factor in using APG.
Keywords: adsorption;alkyl polyglucoside;sorption isotherm;soil organic matter;mineral;remediation
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No.4679019113604414****
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