Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar
Abstract
:1. Introduction
2. Materials and Methods
2.1. Contaminated Soil Sampling and Biochar Preparation
2.2. Experimental Design and Sample Collection
2.3. Measurements and Analysis
2.4. Data Analysis
3. Results
3.1. Effects of the Addition of Biochar on Soil Physicochemical Properties
3.2. Effect of Biochar on Cd Availability in Soil
3.3. Effect of Biochar on Cd Speciation in Soil
4. Discussion
4.1. Effects of the Addition of Biochar on Soil Nutrients and Cd Remediation
4.2. Fundamental Factors Affecting the Availability of Cd in Soil
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Properties | Soil | PBC600 | TPBC600 |
---|---|---|---|
pH | 6.86 ± 0.45 c | 9.92 ± 0.21 b | 10.85 ± 1.00 a |
Ash (%) | - | 41.68 ± 0.52 b | 47.71 ± 0.29 a |
Average pore diameter (nm) | - | 1.94 ± 0.03 b | 3.42 ± 0.01 a |
Surface area (m2·g−1) | - | 2.77 ± 0.18 b | 5.70 ± 0.35 a |
EC (mS·cm−3) | 0.20 ± 0.25 a | 0.38 ± 0.48 a | 0.43 ± 0.17 a |
SOM (g·kg−1) | 10.38 ± 0.57 c | 29.49 ± 0.33 a | 17.65 ± 0.45 b |
TN (g·kg−1) | 0.21 ± 0.02 c | 1.23 ± 0.06 b | 17.32 ± 0.06 a |
(mg·kg−1) | 1.98 ± 0.75 c | 20.42 ± 0.40 b | 40.72 ± 0.51 a |
(mg·kg−1) | 1.38 ± 1.17 c | 2.58 ± 0.18 b | 15.03 ± 0.32 a |
AP (mg·kg−1) | 0.86 ± 0.06 c | 9.50 ± 0.00 a | 8.81 ± 0.16 b |
AK (mg·kg−1) | 22.30 ± 0.20 b | 36.64 ± 0.95 a | 14.03 ± 0.27 c |
AS (mg·kg−1) | 11.77 ± 0.77 b | 6.64 ± 1.40 c | 25.48 ± 1.05 a |
Cd (mg·kg−1) | 9.97 ± 0.01 a | 0.04 ± 0.01 c | 0.06 ± 0.01 b |
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Zhu, Y.; Ma, J.; Chen, F.; Yu, R.; Hu, G.; Zhang, S. Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar. Int. J. Environ. Res. Public Health 2020, 17, 7654. https://doi.org/10.3390/ijerph17207654
Zhu Y, Ma J, Chen F, Yu R, Hu G, Zhang S. Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar. International Journal of Environmental Research and Public Health. 2020; 17(20):7654. https://doi.org/10.3390/ijerph17207654
Chicago/Turabian StyleZhu, Yanfeng, Jing Ma, Fu Chen, Ruilian Yu, Gongren Hu, and Shaoliang Zhang. 2020. "Remediation of Soil Polluted with Cd in a Postmining Area Using Thiourea-Modified Biochar" International Journal of Environmental Research and Public Health 17, no. 20: 7654. https://doi.org/10.3390/ijerph17207654