摘要
泰安市土壤污染的研究还处于起步阶段,尚缺乏系统的研究和探讨。利用因子分析法对泰安市110个农田表层土壤(0～20cm)中7种重金属(Cr、Zn、Cu、Ni、Pb、Cd、Hg)元素进行分析并提取了3个主因子,结合泰安市工业分布情况,对比这3个主因子,分析其可能来源,并对土壤中重金属污染进行了潜在生态风险评估。结果表明,泰安市农田土壤重金属的累积现象比较明显,尤其是Hg、Ni、Cu的最大值均超过了国家土壤环境质量二级标准。相关性分析表明Zn与Ni、Zn与Cu、Ni与Cr之间分别呈显著正相关,Zn与Hg呈显著负相关。因子分析显示,研究区土壤中Zn、Cu、Ni、Cr主要来源于工矿业活动,农业活动和居民生活对Cd和Hg的影响较大,商业活动对Pb污染贡献最大。潜在生态风险评估的结果是Cr、Zn、Ni、Pb4种元素的潜在生态风险均处于低危害水平,Hg、Cd、Cu均存在不同程度的潜在生态风险。
The research on soil pollution in Taian City is at the preliminary stage and still lack systematic study and discussion.Seven heavy metal elements of 110 topsoil samples in Taian City were analyzed by factor analysis and 3 main factors were selected.Combined the distribution situation of enterprises in Taian with comparison of the 3 main factors,the possible origination of soil pollutants were proposed and potential ecological risk of heavy metal pollution were evaluated.The results indicated that the heavy metal accumulation in suburb cropland was obvious especially for Hg,Ni and Cu,with their maximum values higher than the critical value of the second grade in national soil environmental quality standards.The correlation analysis indicated that there were significant positive correlations between Zn and Ni,Zn and Cu,and between Ni and Cr,while there was significant negative correlation between Zn and Hg.The factor analysis results suggested that soil Zn,Cu,Ni and Cr were mainly affected by industrial and mining activities;business activity was the main factor for Pb,and agricultural activities and resident＇s life had much more impact on the accumulation of Hg and Cd.The potential ecological risk assessment showed that the risks of Pb,Zn,Ni and Cr were on a low level,while risks of Cd,Cu,and Hg existed with different degrees.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2011年第10期2012-2017,共6页
Journal of Agro-Environment Science
关键词
泰安
农田土壤
重金属
因子分析
潜在生态风险
Taian
cropland soil
heavy metal
factor analysis
potential ecological risk assessment
