Journal
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
Volume 106, Issue 1, Pages 75-85Publisher
SPRINGER
DOI: 10.1007/s00128-020-02924-8
Keywords
Geological background; Human influence; Soil parent material; Spatial distribution difference; The Pearl River Delta
Categories
Funding
- National Key R&D Program of China [2017YFD0800305]
- Fundamental Research Funds for the Central Universities of China [2652018035]
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The results of the study show serious pollution of Cd in the Pearl River Delta, with high values mainly concentrated in central cities and hotspots with higher Cd content in deep located along rivers. The study suggests that the area is under dual restriction of geological genesis and human activities, highlighting the importance of pollution control.
The results of the Multi-Purpose Geochemical Survey in the Pearl River Delta (PRD) show that the pollution is serious. In this study, the influence of geological genesis, soil-forming process, and human activities on soil quality in PRD is analyzed, and the influence factors, genesis and spatial distributional characteristics of cadmium (Cd) in different soil depths are studied by inverse distance weighted (IDW) and hot spot analysis. The results show that the spatial distribution of Cd is significantly different in PRD and high-value is mainly concentrated in the central cities of Guangzhou-Foshan-Jiangmen-Zhongshan-Zhuhai. Moreover, hot spots with higher Cd content in deep are mainly along Beijiang, Dongjiang, and Pearl River Estuary (PRE). Overall, our findings suggest that the high background value areas formed by marine-land and fluvial sediments as well as intensive human activities that make PRD become an area under the dual restriction of geological genesis and human activities, pollution control cannot be ignored.
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