中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 33 No. 10 October 2023 |
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. National & Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials, Henan University, Kaifeng 475004, China）
Abstract:Geostatistical analysis and Pb isotope tracing were used to characterize the distribution patterns and the sources of heavy metals at a lead smelting site. Furthermore, ecological risks were apportioned based on stochastic theory. The results showed that soils were seriously contaminated by Pb, Zn, As, Cd, Cr and Hg, which reflected strong spatial heterogeneity. Based on MixSIAR model, the density distributions of three endmembers were deconstructed, in which 49.9% of Pb came from smelting activities, and 16.4% and 33.7% from coal combustion and geological source, respectively. Along with the integration of the apportionment of Pb isotope and Monte Carlo simulation, concentration-oriented probabilistic risk indicated that the moderate risk level was dominant, and Cd, As, Pb and Hg were sensitive factors. Source-oriented probabilistic risk presented that smelting contributed the most to risk accumulation. Therefore, the control of Cd, As, Pb and Hg and the disposal of potential smelting sources should be in priority.
Key words: smelting sites; heavy metals; Pb isotope; stochastic simulation; ecological risk
