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Multivariate linear regression model for source apportionment and health risk assessment of heavy metals from different environmental media
- Source :
- Ecotoxicology and environmental safety. 165
- Publication Year :
- 2018
-
Abstract
- The study evaluated source apportionment of heavy metals in vegetable samples from the potential sources of fertilizer, water and soil samples collected along the Changjiang River delta in China. The results showed that 25.72% of vegetable samples (Brassica chinensis L.) containing Pb, and Cd, Cu, Hg and Zn at relatively serious levels were from soil. Combined with principle component analysis (PCA) and cluster analysis (CA), the results of the spatial distribution of heavy metals in different environmental media indicated that fertilizer, water and soil were the main sources of heavy metals in vegetables. The results of multivariate linear regression (MLR) using partition indexes (P) showed that fertilizer contributed to 38.5%, 40.56%, 46.01%, 53.34% and 65.25% of As, Cd, Cu, Pb and Zn contents in vegetables, respectively. In contrast, 44.58% of As, 32.57% of Hg and 32.83% of Pb in vegetables came from soil and 42.78% of Cd and 66.97% of Hg contents in vegetables came from the irrigation water. The results of PCA and CA verified that MLR using P was suitable for determining source apportionment in a vegetable. A health risk assessment was performed; As, Cd and Pb contributed to more than 75% of the total hazard quotient (THQ) values and total carcinogenic risk values (Risktotal) for adults and children through oral ingestion. More than 70% of the estimated THQ and Risktotal is contributed by water and fertilizer. Therefore, it is necessary to increase efforts in screening limits/levels of heavy metals in fertilizer and irrigation water and prioritize appropriate pollution management strategies.
- Subjects :
- Adult
China
Agricultural Irrigation
Soil test
Health, Toxicology and Mutagenesis
Brassica
010501 environmental sciences
engineering.material
01 natural sciences
Risk Assessment
Toxicology
Soil
Rivers
Apportionment
Bayesian multivariate linear regression
Metals, Heavy
Vegetables
Cluster Analysis
Humans
Soil Pollutants
Child
Fertilizers
0105 earth and related environmental sciences
Principal Component Analysis
biology
Health risk assessment
Public Health, Environmental and Occupational Health
Heavy metals
04 agricultural and veterinary sciences
General Medicine
biology.organism_classification
Pollution
Hazard quotient
Multivariate Analysis
040103 agronomy & agriculture
engineering
Linear Models
0401 agriculture, forestry, and fisheries
Environmental science
Regression Analysis
Fertilizer
Environmental Pollution
Environmental Monitoring
Subjects
Details
- ISSN :
- 10902414
- Volume :
- 165
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology and environmental safety
- Accession number :
- edsair.doi.dedup.....55873dba2cd7b7e2e39ae6a942f5966c