辽河口不同类型湿地土壤汞、甲基汞含量及其影响因素

发布时间：2018-04-19 10:21

  本文选题：汞 + 甲基汞　； 参考：《生态学杂志》2017年04期

【摘要】：通过对辽河口三道沟、笔架岭两地不同类型湿地土壤中总汞、甲基汞以及影响因素的研究,从植物自然演替的角度,分析了辽河口不同类型湿地总汞、甲基汞的分布及转化因素。结果表明:不同类型湿地土壤汞含量为0.036~0.069 mg·kg~(-1),土壤甲基汞含量为0.77~2.56μg·kg~(-1);三道沟湿地土壤汞、甲基汞含量明显低于笔架岭湿地;从光滩到芦苇湿地,表层土壤汞、甲基汞含量逐渐降低;从笔架岭湿地剖面分析来看,从表层到深层,芦苇湿地、碱蓬湿地土壤汞、甲基汞含量逐渐降低,光滩剖面土壤汞含量先增加后降低再增加,光滩土壤甲基汞含量总体上呈降低趋势;从土壤总汞、甲基汞与其他影响因素的关系看,土壤汞与甲基汞具有显著相关关系,土壤汞与钾、易溶性盐具有正相关关系。
[Abstract]:Based on the study of total mercury, methylmercury and influencing factors in different types of wetland soils in Sandaogou, Liaohe estuary and Bijialing, the total mercury in different types of wetlands in Liaohe estuary was analyzed from the point of view of plant natural succession.Distribution and transformation factors of methylmercury.The results showed that the content of mercury in soil was 0.036 ~ 0.069 mg / kg ~ (-1) and methylmercury in soil was 0.77 ~ 2.56 渭 g 路kg ~ (-1) 路kg ~ (-1) ~ (-1), in Sandaogou wetland, the content of methylmercury in soil was obviously lower than that in penholder wetland, and the content of mercury and methylmercury in surface soil gradually decreased from light beach to Reed wetland.From the analysis of Bijialing wetland profile, from surface to deep layer, the mercury content in Reed wetland and Suaeda salsa wetland soil gradually decreased, and the mercury content in soil increased first and then decreased then increased in Guangtan section.According to the relationship between soil total mercury, methylmercury and other influencing factors, soil mercury has a significant correlation with methylmercury, and soil mercury has a positive correlation with potassium and easily soluble salt.
【作者单位】： 沈阳大学环境学院;沈阳大学区域污染环境生态修复教育部重点实验室;
【基金】：国家自然科学基金项目(41571085和31300444)资助
【分类号】：S153
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本文编号：1772693