腐殖酸对灰棕紫泥中汞赋存形态的影响  

Effect of Humic Acids on Species of Mercury in Gray Brown Purple Mud

作　　者：高洁[1] 李雪梅[1] 闫金龙[1] 魏世强[1,2] 陈雪霜[1] 王齐磊[1] 张慕雪[1] 

机构地区：[1]西南大学资源环境学院,重庆北碚400716 [2]重庆市农业资源与环境研究重点实验室,重庆北碚400716

出　　处：《水土保持学报》2014年第5期199-203,共5页Journal of Soil and Water Conservation

基　　金：国家重点基础研究发展计划"973"计划项目(2013CB430003-04);国家自然科学基金项目(40971147);西南大学国家级大学生创新训练项目(201310635054);西南大学本科生科技创新基金项目(1224008)

摘　　要：通过室内培养探讨不同富里酸/胡敏酸(FA/HA)、腐殖酸含量、汞污染浓度对灰棕紫泥中汞赋存形态的影响。结果表明,施用腐殖酸降低汞的活性,腐殖酸各处理均能促进土壤中水溶态、交换态和酸溶态汞向碱溶态、有机结合态和残渣态汞转化。FA/HA≤0.7时,腐殖酸能够促进土壤中的活性态汞向惰性态汞转化,但当FA/HA≥1时,腐殖酸对土壤汞有一定的活化作用;含碳2%的腐殖酸对土壤汞的固定效果好于其他碳含量(0.5%,1%,1.5%碳)腐殖酸;当土壤中汞污染浓度达到3mg/kg时,腐殖酸对汞的固定效果要降低。An indoor cultivation experiment was carried out to discuss the effects of different fulvic acid/humic acid（FA/HA）,humic acid content and mercury concentration to the species of mercury in gray brown purple mud.The results showed that the application of humic acid decreased the activity of mercury,and it could make the transformation of water soluble,exchangeable and acid soluble mercury into alkali soluble,organic and residual mercury.FA/HA≤0.7,humic acid could transform active mercury into inert mercury,but when FA/HA≥1,humic acid had certain activation to mercury.Fixation of 2% C humic acid to mercury was better than the other carbon content（0.5%,1%,1.5% C）.When the concentration of mercury in the soil reached 3mg/kg,fixation of humic acid reduced.

关 键 词：腐殖酸 灰棕紫泥 FA/HA 汞浓度 

分 类 号：X53[环境科学与工程—环境工程] X131