Effects of Straw Return and Moisture Condition on Temporal Changes of DOM Composition and Cd Speciation in Polluted Farmland Soil
Abstract
:1. Introduction
2. Materials and Methods
2.1. Material Collection and Sample Preparation
2.2. Laboratory Incubation Experiment
2.3. Characterization of DOM
2.4. Geochemical Fractionation of Cd in Soil
2.5. Fluorescent Indices
2.6. Other Physical and Chemical Analyses
2.7. Statistical Analysis
3. Results
3.1. Dynamics of Total and Dissolved Organic Matter Content in Soil
3.2. Composition of DOM Fluorescent Components
3.3. Dynamics of Cd Speciation in Soil
4. Discussion
4.1. Effects of Straw Return and Soil Moisture on Soil DOM Content
4.2. Effects of Straw Return on Cd Speciation in Soil
4.3. Correlations among Soil Cd Speciation and DOM Fluorescence Parameters
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Soil Sampling Site | Straw Type | Moisture Condition | DOC Content 1 | R2 |
---|---|---|---|---|
Fitted Equation | ||||
A | Maize | Unsaturated | 0.998 * 1 | |
Flooded | 0.995 * | |||
Rice | Unsaturated | 0.999 * | ||
Flooded | 0.980 * | |||
Control | Unsaturated | 0.994 * | ||
Flooded | 0.993 * | |||
B | Maize | Unsaturated | 0.995 * | |
Flooded | 0.991 * | |||
Rice | Unsaturated | 0.994 * | ||
Flooded | 0.941 * | |||
Control | Unsaturated | 0.986 * | ||
Flooded | 0.986 * |
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Yang, G.; Tang, X.; Guan, Z.; Cui, J. Effects of Straw Return and Moisture Condition on Temporal Changes of DOM Composition and Cd Speciation in Polluted Farmland Soil. Int. J. Environ. Res. Public Health 2022, 19, 12128. https://doi.org/10.3390/ijerph191912128
Yang G, Tang X, Guan Z, Cui J. Effects of Straw Return and Moisture Condition on Temporal Changes of DOM Composition and Cd Speciation in Polluted Farmland Soil. International Journal of Environmental Research and Public Health. 2022; 19(19):12128. https://doi.org/10.3390/ijerph191912128
Chicago/Turabian StyleYang, Guang, Xiangyu Tang, Zhuo Guan, and Junfang Cui. 2022. "Effects of Straw Return and Moisture Condition on Temporal Changes of DOM Composition and Cd Speciation in Polluted Farmland Soil" International Journal of Environmental Research and Public Health 19, no. 19: 12128. https://doi.org/10.3390/ijerph191912128