浅山区典型小流域土壤重金属影响因素及来源分析  

Analysis of soil heavy metal influencing factors and sources in typical small watersheds in shallow mountainous area

作　　者：史敬涛 刘俊建 张军超 王江玉龙 姜禹戈 王末 李横飞 杨文号 颜翔锦 SHI Jing-Tao;LIU Jun-Jian;ZHANG Jun-Chao;WANG Jiang-Yu-Long;JIANG Yu-Ge;WANG Mo;LI Heng-Fei;YANG Wen-Hao;YAN Xiang-Jin(Langfang Natural Resources Comprehensive Survey Center,China Geological Survey,Langfang 065000,China;Pingquan Soil and Water Conservation Construction Service Center,Pingquan 067500,China;Mudanjiang Natural Resources Comprehensive Survey Center,China Geological Survey,Mudanjiang 157000,China)

机构地区：[1]中国地质调查局廊坊自然资源综合调查中心,河北廊坊065000 [2]平泉市水土保持建设服务中心,河北平泉067500 [3]中国地质调查局牡丹江自然资源综合调查中心,黑龙江牡丹江157000

出　　处：《物探与化探》2024年第3期834-846,共13页Geophysical and Geochemical Exploration

基　　金：中国地质调查局项目“滦河流域中上游生态修复支撑调查”(DD20220954);自然资源部自然资源要素耦合过程与效应重点实验室项目“滦河中游植被组成与土壤水分和养分相互作用机理”(2022KFKTC009)。

摘　　要：本次研究调查了平泉市瀑河流域不同岩性岩石及所形成的土壤中8种重金属元素及相关氧化物的含量,分析了浅山区典型小流域土壤重金属元素影响因素及来源,以期为京津冀水源涵养生态修复提供理论支撑。通过选取表层、深层土壤和成土母岩中的重金属元素为研究对象,以土壤重金属含量为基础,以空间分布为依据,并结合区域地质背景,采用多项统计方法深入分析其影响因素及来源。结果显示,研究区表层与深层的土壤重金属元素含量较为相近,且其空间分布具有耦合性,在垂向分布上,重金属元素在表层土壤和成土母岩中的相关系数为负值,而在深层土壤和成土母岩中的相关系数为正值。该结果表明,在表层土壤中,Cr、Ni、Cu、Zn和Pb等主要来源于成土母岩,而Cd、Hg和As等则受控于矿业开采的影响;在深层土壤中,8种重金属元素的主要来源是成土母岩,而Cd和As则受成土母岩和人为因素的共同影响。This study investigated the contents of eight heavy metals and related oxides in rocks with different lithologies and the soils formed in the Puhe river basin of Pingquan City.Based on the above investigation,this study analyzed the influencing factors and sources of soil heavy metals in the typical small watershed of the shallow mountainous area,aiming to provide theoretical support for water conservation and ecological restoration in the Beijing-Tianjin-Hebei region.Based on the contents and spatial distributions of soil heavy metals and combined with regional geological setting,this study delved into the influencing factors and sources of heavy metal elements in topsoil,deep soil,and soil parent materials using multiple statistical methods.The results show that heavy metals in topsoil and deep soil exhibited relatively similar contents and coupled spatial distributions.In terms of vertical distributions,the correlation coefficients of heavy metals were negative between topsoil and soil parent materials but positive between deep soil and soil parent materials.As indicated by the results,in the topsoil,elements Cr,Ni,Cu,Zn,and Pb are primarily derived from soil parent materials,while elements Cd,Hg,and As are subjected to the influence of mining.In contrast,the eight heavy metals in the deep soil predominantly stem from soil parent materials,with anthropogenic factors contributing to Cd and As.

关 键 词：浅山区小流域 土壤重金属 影响因素 矿业开采 来源 

分 类 号：X825[环境科学与工程—环境工程] X142