摘要
为查明右江河谷地区地形对重金属Cd、Pb分布的影响,分别沿河谷选取11条采样线以及与河谷走向近垂直的小山上选取2条采样线采集浅层土壤样品,并检测土壤中Cd和Pb的含量,结合采样点位置,分析了右江河谷地区浅层土壤中Cd、Pb含量的空间分布特征.结果表明:研究区域土壤中Cd和Pb水平方向分布具有一定的相似性,即东部重金属含量较高,西部次之,中部最低;地形对Cd和Pb分布的影响也具有较好的同步性,均显示出迎风坡含量高,山顶含量低的特点.结合本区的具体情况,测试结果表明:右江河谷地区Cd、Pb主要来源于研究区东部的铝土矿区,风力对Cd、Pb的迁移有较大影响,重力沉降是大气中Cd、Pb沉降的主要方式,大气在水平和垂直方向上的回旋是Cd、Pb沉降的主要原因.
In order to find out the relationship between the distribution of heavy metals Cd and Pb and topography in Youjiang river basin,11 sampling lines are selected along the basin,and 2 sampling lines are selected on a hills which are nearly perpendicular to the basin direction to collect shallow soil samples.The contents of Cd and Pb in the soil were detected.The spatial distribution characteristics of Cd and Pb contents in shallow soil of Youjiang river basin are analyzed combined with the location of the sampling point.The results show that the horizontal distribution of Cd and Pb in the soils of the study area has certain similarity,that is,the heavy metal content is higher in the eastern part,followed by the western part and the lowest in the central part.The influence of topography on the distribution of Cd and Pb also has a good synchronization,showing the characteristic of that the content in windward slope is higher,and the content on mountain peak is lower.Combined with the specific circumstances of this area,the test results show that the Cd and Pb in the Youjiang river basin are mainly derived from the bauxite mining area on the eastern of study area,and the wind has a greater influence on migration of Cd and Pb,and gravity sedimentation is the dominant form of Cd and Pb sedimentation from the atmosphere.The rotation of the atmosphere in the horizontal and vertical directions is the main reason for the gravity settlement of Cd and Pb.
作者
毛政利
覃卓萍
黄尚明
MAO Zhengli;QIN Zhuoping;HUANG Shangming(School of Management Science and Engineering,Baise University,Baise 533000,China)
出处
《扬州大学学报（自然科学版）》
CAS
北大核心
2021年第2期73-78,共6页
Journal of Yangzhou University：Natural Science Edition
基金
广西自然科学基金资助项目(2017GXNSFAA198146)。
关键词
迁移沉降
大气回旋
CD
PB
右江河谷
migration and sedimentation
rotation of the atmosphere
Cd
Pb
Youjiang river basin
