Model construction for estimating potential vulnerability of Japanese soils to cadmium pollution based on intact soil properties

Autor: Takehiko I. Hayashi, Taizo Nakamori, Takafumi Kamitani, Yoshikazu Fujii, Yuichi Iwasaki, Tetsuo Yasutaka, Masashi Kamo, Kyoko Ono
Jazyk: angličtina
Rok vydání: 2019
Předmět:
0211 other engineering and technologies
02 engineering and technology
010501 environmental sciences
Soil Chemistry
Ligands
01 natural sciences
Physical Chemistry
Soil
Mathematical and Statistical Techniques
Japan
Soil pH
Cation-exchange capacity
Soil Pollutants
Multidisciplinary
Ecology
Statistics
Biotic Ligand Model
Soil chemistry
Soil Ecology
Soil contamination
Chemistry
Community Ecology
Environmental chemistry
Physical Sciences
Regression Analysis
Medicine
Algorithms
Research Article
Chemical Elements
Cadmium
Environmental Monitoring
Soil biology
Science
Soil Science
Biological Availability
Ecological Risk
Linear Regression Analysis
Research and Analysis Methods
complex mixtures
Cation Exchange Capacity
Cations
Metals
Heavy
Soil ecology
Environmental Chemistry
Statistical Methods
0105 earth and related environmental sciences
Ions
021110 strategic
defence & security studies
Ecology and Environmental Sciences
Biology and Life Sciences
Models
Theoretical
Soil water
Environmental science
Environmental Pollution
Mathematics
Zdroj: PLoS ONE, Vol 14, Iss 6, p e0218377 (2019)
PLoS ONE
ISSN: 1932-6203
Popis: Prediction of heavy metal bioavailability in intact soil is important to manage soil pollution risks. We developed a regression model for representative Japanese soils to judge their potential vulnerability to cadmium (Cd) pollution. We added four rates of Cd to 17 sample soils to mimic artificial contamination. After aging the contaminated soils, we measured Cd’s bioavailability using the diffusive gradients in thin-films (DGT) technique. We then evaluated the relationships between bioavailability of Cd ([CdDGT]) and intact soil properties by statistical analyses. Cation exchange capacity (CEC) and pH emerged as significant factors to explain the cadmium bioavailability in Japanese soils. Specifically, lower CEC and lower pH were associated with higher [CdDGT], which poses a higher risk for soil ecosystems. The correlation between pH and [CdDGT] had a high dependence on [CdAdd], whereas that for CEC did not. Regression analysis also showed that the interaction between intact soil pH and spiked concentration ([CdAdd]) had a significant contribution to [CdDGT]. The regression model developed was rationally supported by a biotic ligand model. This simplified but realistic model would be useful in estimating the vulnerability of representative Japanese soils and determining the risk for Japanese soils in relation to Cd contamination.
Databáze: OpenAIRE
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