物探化探计算技术2026，Vol.48Issue(3)：422-433,12.DOI:10.12474/wthtjs.20251125-0003
洛阳市硒高背景区农田土壤重金属形态特征及影响因素研究
Study on the characteristics and influencing factors of heavy metal forms in farmland soil in the Selenium-rich area of Luoyang City
摘要
Abstract
Speciation analysis of heavy metals was conducted on 38 farmland soil samples from the high selenium background area of the Yiluo River Basin,Luoyang City.The results show that the speciation composition of each element is basically consistent across different soil types and geological units.The residual fractions of As,Zn,Cu,Hg and Pb all account for more than 50%of the total contents.Cd has the highest proportion of mobile fractions,reaching 39.92%,indicating it is a potentially high-risk element.Pb is mainly present in the iron-manganese oxide fraction.Correlation analysis between elemental speciation and total contents shows that the humic acid-bound,iron-manganese oxide-bound,strongly organic-bound and residual fractions of all elements are significantly positively correlated with their total contents.The water-soluble,ion-exchangeable and carbonate-bound fractions of Cu and Cd,as well as the carbonate-bound fractions of Pb and Zn,are also significantly positively correlated with their total contents.Soil organic matter and pH exert significant influences on the total contents and speciation of heavy metals.Soil organic matter has no significant correlation with total As and its residual fraction,residual Cd,or carbonate-bound Pb,but is positively correlated with other fractions and total contents.Soil pH is significantly negatively correlated with the water-soluble and ion-exchangeable fractions of Pb and Zn,and negatively correlated with the water-soluble fractions of Cd and Cu.In contrast,pH is significantly positively correlated with the water-soluble,ion-exchangeable,carbonate-bound,humic acid-bound and iron-manganese oxide-bound fractions of As.关键词
洛阳市/农田土壤/重金属/形态/影响因素Key words
Luoyang City/farmland soil/heavy metals/speciation/influencing factors分类
资源环境引用本文复制引用
申浩君,任超,侯进凯,莘丰培,任高,姚婕,王喜宽..洛阳市硒高背景区农田土壤重金属形态特征及影响因素研究[J].物探化探计算技术,2026,48(3):422-433,12.基金项目
洛阳市硒资源详查项目(洛公交易采购[2018]053号) （洛公交易采购[2018]053号）
