title: Temporal-spatial variation and source apportionment of soil heavy metals in the representative river-alluviation depositional system.
abstract: The contributions of major driving forces on temporal changes of heavy metals in the soil in a representative river-alluviation area at the lower of Yangtze River were successfully quantified by combining geostatistics analysis with the modified principal component scores & multiple linear regressions approach (PCS-MLR). The results showed that the temporal (2003-2014) changes of Cu, Zn, Ni and Cr presented a similar spatial distribution pattern, whereas the Cd and Hg showed the distinctive patterns. The temporal changes of soil Cu, Zn, Ni and Cr may be predominated by the emission of the shipbuilding industry, whereas the significant changes of Cd and Hg were possibly predominated by the geochemical and geographical processes, such as the erosion of the Yangtze River water and leaching because of soil acidification. The emission of metal-bearing shipbuilding industry contributed an estimated 74%-83% of the changes in concentrations of Cu, Zn, Ni and Cr, whereas the geochemical and geographical processes may contribute 58% of change of Cd in the soil and 59% of decrease of Hg.
authors.affiliation: Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China. Electronic address: wangcheng118@163.com.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.affiliation: School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China.
authors.forename: Zhongfang
authors.initials: Z
authors.lastname: Yang
authors.affiliation: Key Laboratory of Beibu Gulf Environment Change and Resources Use (Guangxi Teachers Education University), Ministry of Education, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation (Guangxi Teachers Education University), Nanning Guangxi 530001, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Zhong
authors.affiliation: Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Ji
mesh_terms: D002681:China; D004784:Environmental Monitoring / Q000379:methods; D005843:Geography; D007221:Industry; D019216:Metals, Heavy / Q000032:analysis*; D045483:Rivers; D012767:Ships; D012989:Soil Pollutants / Q000032:analysis*; D062206:Spatial Analysis
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants
keywords: Heavy metals; Soil; Source appointment; Temporal change; Yangtze river