Evaluation of factors affecting arsenic uptake by Brassica juncea in alkali soil after biochar application using partial least squares path modeling (PLS-PM)

Biochar application to As-contaminated soil can alter various soil chemical properties, and it can affect available As, plant As uptake, and As phytotoxicity. Increased dissolved organic carbon (DOC) and P released from biochar affect As behavior in the soil system. In this study, we evaluated the e...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2021-07, Vol.275, p.130095-130095, Article 130095
Main Authors: Kim, Min-Suk, Lee, Sang-Hwan, Kim, Jeong-Gyu
Format: Article
Language:English
Subjects:
Alkalies
Arsenic
Available phosphorus
Bioavailability
Charcoal
Dissolved organic carbon
Fruit peel
Least-Squares Analysis
Multivariate analysis
Mustard Plant
Soil
Soil Pollutants - analysis
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Summary:Biochar application to As-contaminated soil can alter various soil chemical properties, and it can affect available As, plant As uptake, and As phytotoxicity. Increased dissolved organic carbon (DOC) and P released from biochar affect As behavior in the soil system. In this study, we evaluated the effect of biochar application on the chemical properties of soil and phytotoxicity in Brassica juncea using correlation analysis and partial least squares path modeling (PLS-PM). Biochar application increased electrical conductivity (EC), DOC, available P and available As. However, the increased available As did not significantly affect As uptake by B. juncea due to the decrease in the relative ratio and effect of available As with increase in available P derived from biochar. Moreover, biochar application negatively affected soil chemical properties (pH, EC, DOC, available P, and available As) and As uptake by B. juncea. Therefore, correlation analysis and PLS-PM analysis are useful tools to interpret the interactions among influencing factors in the soil-plant system. An approach at the equivalent molecular level rather than concentration should be adopted in future studies. •Biochar application to the soil increases DOC, available P and available As.•Available As is increased but the As uptake by B. juncea does not increase.•Correlation and PLS-PM analysis also demonstrate same trends of results.•Ratio of available As to available P has a decisive effect on As uptake by B. juncea
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2021.130095