An Integrated H-G Scheme Identifying Areas for Soil Remediation and Primary Heavy Metal Contributors: A Risk Perspective.
Traditional sampling for soil pollution evaluation is cost intensive and has limited representativeness. Therefore, developing methods that can accurately and rapidly identify at-risk areas and the contributing pollutants is imperative for soil remediation. In this study, we propose an innovative integrated H-G scheme combining human health risk assessment and geographical detector methods that was based on geographical information system technology and validated its feasibility in a renewable resource industrial park in mainland China. With a discrete site investigation of cadmium (Cd), arsenic (As), copper (Cu), mercury (Hg) and zinc (Zn) concentrations, the continuous surfaces of carcinogenic risk and non-carcinogenic risk caused by these heavy metals were estimated and mapped. Source apportionment analysis using geographical detector methods further revealed that these risks were primarily attributed to As, according to the power of the determinant and its associated synergic actions with other heavy metals. Concentrations of critical As and Cd, and the associated exposed CRs are closed to the safe thresholds after remediating the risk areas identified by the integrated H-G scheme. Therefore, the integrated H-G scheme provides an effective approach to support decision-making for regional contaminated soil remediation at fine spatial resolution with limited sampling data over a large geographical extent.
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Changsha, Hunan, 410083, China. 210010@csu.edu.cn.|School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, China. 210010@csu.edu.cn.
Bin
B
Zou
School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, China.
Xiaolu
X
Jiang
School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.|State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Xiaoli
X
Duan
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Xiuge
X
Zhao
School of Geosciences and Info-Physics, Central South University, Changsha, Hunan, 410083, China.
Jing
J
Zhang
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Changsha, Hunan, 410083, China.
Jingwen
J
Tang
Hunan provincial communications planning, survey and design institute, Changsha, Hunan, 410008, China.
Guoqing
G
Sun
D002273:Carcinogens / Q000032:analysis; D002681:China; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D018570:Risk Assessment / Q000379:methods*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D062206:Spatial Analysis
D002273:Carcinogens; D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants