期刊
SUSTAINABILITY
卷 13, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/su13179651
关键词
soil heavy metals; spatial distribution; source apportionment; Pearl River Delta
资金
- National Key Research and Development Program of China [2018YFC1800304, 2018YFC1802803]
- Science and Technology Project of Guangzhou City, China [202103000018]
- Natural Science and Technology Project of Guangdong Province, China [2016A030313697]
- STU scientific research foundation for talents [NTF20001]
In this study, the contents of ten heavy metals in surface soil samples from the Pearl River Delta region were investigated. The results showed that the soil quality was generally good, with slightly elevated levels of certain heavy metals compared to background values. The source apportionment analysis revealed that the majority of soil heavy metals in the PRD region could be attributed to natural and industrial sources, with smaller contributions from transportation and agricultural activities.
The contents of ten heavy metals (HMs) (Cu, Pb, Zn, Cd, Ni, Cr, Hg, As, Co, and Mn) in 80 surface soil samples (0-20 cm) were investigated in the Pearl River Delta (PRD), Guangdong Province, China. The average contents of Cu, Pb, Zn, Cd, Ni, Cr, Hg, As, Co, and Mn were 16.45, 40.20, 45.10, 0.09, 12.93, 47.93, 0.13, 14.44, 5.68, and 199.66 mg/kg, respectively. The soil quality was generally good, though slightly higher levels (1.17, 1.61, 1.67, and 1.62 times) of soil Pb, Cd, Hg, and As contents were observed compared with the soil background values. The spatial distribution of soil HM pollution in the PRD showed that 36% of sample sites were evaluated as sites without soil pollution, 32% as sites with slight pollution, 20% as sites with nearly moderate pollution, 9% as sites with moderate pollution, and 3% as site with serious pollution. Source apportionment analysis showed that the source of 64.33% of soil HMs in the PRD could be explained by natural and industrial sources, 24.80% by transportation, and 10.87% by agricultural activities.
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