摘要:
由辽宁省彰武县的草炭土壤提取富里酸(FA),研究在不同流速、pH、离子强度和非离子型表面活性剂条件下,富里酸的运移特征及对重金属运移的影响.结果表明,不同流速下,富里酸的峰值C/C0变化不大,对富里酸在多孔介质中的运移影响不大;pH=7时,C/C0值和回收率MR值最大,运移效果最好,而在碱性和酸性条件下不利于富里酸的迁移;富里酸随离子强度的升高,穿透曲线的C/C0值降低,表面活性剂对富里酸的运移影响较大,浓度越大,C/C0值和MR值越小;FA与重金属(Cu、Cd和Pb)穿透曲线的MR值与重金属单独运移实验的MR值均有所改变,可知FA对重金属的运移影响比较大.%Fulvic acid was extracted by peat soil in Liaoning province Zhangwu. Study the migration char-acteristics of fulvic acid in porous media,under the condition of different flow velocity,pH,ionic strength, non-ionic surfactants,and the effect of fulvic acid on heavy metal migration. The results show that under different flow velocity,the peak of fulvic acid C/C0 value changed little,the fulvic acid has a little influ-ence on migration in porous media;pH=7,C/C0 value and the recovery rate of MR is largest,the migra-tion effect is best, under alkaline and acidic conditions are not conducive to migrate fulvic acid;Fulvic acid with the increase of ionic strength,penetration curve C/C0 value decreased;Surfactants have more in-fluence on the migration of fulvic acid,the greater the concentration,the smaller C/C0 value and MR;The breakthrough curves of FA together with heavy metals ( Cu,Cd and Pb) migration MR values is different from the heavy metal migration experiment alone,shows FA have a relatively large impact on migration of heavy metals.