LI Jing,LI Suyan,SUN Xiangyang,et al.Characteristics of Distribution of Soil Heavy Metals in Wuhuan, Chaoyang District, Beijing[J].Research of Soil and Water Conservation,2019,26(03):311-317.
北京市朝阳区(五环内)绿地土壤重金属分布特征及其影响因素
- Title:
- Characteristics of Distribution of Soil Heavy Metals in Wuhuan, Chaoyang District, Beijing
- Keywords:
- urban soil; heavy metal distribution; soil pH; soil organic matter
- 分类号:
- X53
- 摘要:
- 为了研究和分析北京市朝阳区（五环内）土壤重金属的分布特征及影响因素，通过居住绿地、公园绿地、街旁绿地以及附属绿地（包括公共设施用地、对外交通用地和市政设施用地）4种土壤利用类型分别进行了土壤重金属铜（Cu）、锌（Zn）、镉（Cd）、铅（Pb）以及土壤pH值、有机质的测定。结果表明：表层土壤中的重金属平均含量，除Pb外，均高于中国土壤背景值，尤其是重金属Cd，已达到0.26 mg/kg，超过了国家土壤环境质量1级标准；从土壤利用类型上来看，Cu在附属绿地土壤含量最高，达到33.576 mg/kg，Zn在居住绿地土壤含量最高，达到80.636 mg/kg，Cd在街旁绿地土壤含量最高，达到0.296 mg/kg，Pb在公园绿地土壤含量最高，达到24.706 mg/kg；在空间分布上，重金属Cu和Zn空间分布格局相类似，整体呈由西北向东南递减趋势，而Cd高值区在中部，整体北部高于南部，重金属Pb整体上呈由西南向东北递减趋势；通过相关性分析可知，土壤pH值对土壤重金属含量没有明显的影响，而土壤有机质与重金属Zn，Cd和Pb的含量有明显的相关性；4种重金属呈显著正相关（p<0.01）。
- Abstract:
- In order to study and analyze the distribution characteristics and influencing factors of heavy metals in Chaoyang District, Beijing, through residential greenbelts, park greenbelts, street greenbelts, and affiliated greenbelts (including public facilities, external transport and municipal facilities), four kinds of soil use types were used to measure the soil heavy metals such as copper (Cu), zinc (Zn), cadmium (Cd), lead (Pb), and soil pH and organic matter. The results showed that the average content of heavy metals in surface soil, except for Pb, was higher than that of Chinese soil, especially heavy metal Cd, which had reached 0.26 mg/kg, and exceeded the standard of soil environmental quality grade 1; Cu content in the attached green space was the highest, reaching 33.576 mg/kg. Zn content in the soil of residential greenbelt was the highest, reaching 80.636 mg/kg. Cd content was the highest in the street green space, reaching 0.296 mg/kg. Pb content was the highest in the green space of the park, reaching 24.706 mg/kg; in the spatial distribution, spatial distribution pattern of heavy metal Cu and Zn was similar, and overall showed the decreasing trend from northwest to southeast, the content of Cd in the middle was higher, and was higher in north than the south. The heavy metal Pb decreased from southwest to northeast as a whole; according to the correlation analysis, the soil pH had no obvious effect on the heavy metal contents of the soil, while the soil organic matter was significantly related to the contents of heavy metals Zn, Cd, and Pb; the four heavy metals showed significantly positive correlation(p<0.01).
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备注/Memo
收稿日期:2018-06-01;改回日期:2018-07-20。
基金项目:市委、市政府重点工作及区县政府应急项目预启动，北京市绿地林地土壤质量提升关键技术研究与示范（Z161100001116061）
作者简介:李婧(1993-),女,河北省唐山市人,硕士研究生,主要从事土壤资源与环境的研究。E-mail:1263792807@qq.com
通讯作者:李素艳(1968-)女,北京市人,博士,主要从事土壤修复与健康。E-mail:lisuyan@bjfu.edu.cn