Assessment of the pollution levels of potential toxic elements in urban vegetable gardens in southwest China

doi:10.1038/s41598-021-02069-6

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Assessment of the pollution levels of potential toxic elements in urban vegetable gardens in southwest China
	Gao, Jianing 2,3; Zhang, Dan 3; Proshad, Ram 2,3; Uwiringiyimana, Ernest 2,3; Wang, Zifa 1
刊名	SCIENTIFIC REPORTS
	2021-11-24
卷号	11 期号:1 页码:13
关键词	HEAVY-METAL POLLUTION AGRICULTURAL SOILS SPATIAL-DISTRIBUTION GEOSTATISTICAL ANALYSES RISK-ASSESSMENT
ISSN号	2045-2322
DOI	10.1038/s41598-021-02069-6
英文摘要	Vegetable gardens are increasingly common in urban areas and can provide numerous societal benefits; however, contamination with potential toxic elements (PTEs) due to urbanization and industrialization is cause for concern. The present study aimed to assess the source of contamination and pollution levels in urban garden soils, as well as the health risks for adults and children consuming vegetables grown in such environments. Various types of vegetable samples and their corresponding soils from 26 community gardens were collected throughout Chengdu City in southwestern China. The results showed that leafy vegetables, particularly lettuce leaves and Chinese cabbage, had relatively higher levels of Cd (0.04 mg/kg FW) and Pb (0.05 mg/kg FW), while higher levels of As (0.07 mg/kg FW), Cr (0.07 mg/kg FW), and Hg (0.003 mg/kg FW) were found in amaranths, tomatoes, and Houttuynia cordatas, respectively. The pollution indices revealed that the vegetable purplish soils were relatively more polluted by Cd and As, and the concentrations of these metals in vegetables were correlated with their concentrations in the soils. Principal component analysis grouped the PTEs in two dimensions that cumulatively explained 62.3% of their variation, and hierarchical clustering identified two distinct clusters indicating that Cr originated from a unique source. The health risk assessment revealed that exposure to As and Cd induced the greatest non-carcinogenic risk, whereas Cr was most likely to cause cancer risks. Furthermore, contaminated vegetable consumption was riskier for children than adults. The critical factors contributing to PTE contamination in vegetable gardens were determined to be vegetable species, total soil element content, soil pH, and soil organic matter content. Overall, Cr and As pollution present the greatest concern, and community health care services must enact more effective regulatory and preventative measures for urban gardens in terms of PTEs.
资助项目	Project of Institute of Atmospheric Physics, Chinese Academy of Sciences, China
WOS关键词	HEAVY-METAL POLLUTION ; AGRICULTURAL SOILS ; SPATIAL-DISTRIBUTION ; GEOSTATISTICAL ANALYSES ; RISK-ASSESSMENT ; HEALTH-RISK ; SOURCE IDENTIFICATION ; SOURCE APPORTIONMENT ; HORTICULTURAL SOILS ; GUANGDONG PROVINCE
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000722365800069
资助机构	Project of Institute of Atmospheric Physics, Chinese Academy of Sciences, China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56326]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Zhang, Dan
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Gao, Jianing,Zhang, Dan,Proshad, Ram,et al. Assessment of the pollution levels of potential toxic elements in urban vegetable gardens in southwest China[J]. SCIENTIFIC REPORTS,2021,11(1):13.
APA	Gao, Jianing,Zhang, Dan,Proshad, Ram,Uwiringiyimana, Ernest,&Wang, Zifa.(2021).Assessment of the pollution levels of potential toxic elements in urban vegetable gardens in southwest China.SCIENTIFIC REPORTS,11(1),13.
MLA	Gao, Jianing,et al."Assessment of the pollution levels of potential toxic elements in urban vegetable gardens in southwest China".SCIENTIFIC REPORTS 11.1(2021):13.