Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Reagents and Soil Samples
2.2. Preparation of Amendment
2.3. Adsorption Experiments
2.4. Characterization
2.5. Soil Remediation Experiments
2.6. Pot Experiment
2.7. Statistical Analysis
3. Results and Discussion
3.1. Characteristics of Illite before and after Modification
3.2. Mechanism of Cadmium Stabilization
3.2.1. Adsorption Isotherms of Amended Soil
3.2.2. Characterization of MIT after Adsorption
3.2.3. Analysis of Soil Remediation
3.2.4. Stabilization Mechanism
3.3. Enhancement of Soil Fertility
3.3.1. Effect on Plant Growth
3.3.2. Enrichment of Soil Nutrients
3.3.3. Improvement of Soil Quality
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Illite | MIT |
---|---|---|
pH | 6.8 | 11.2 |
CEC | 23.11 | 98.37 |
BET surface area (m2/g) | 10.32 | 37.49 |
Adsorption average pore diameter (nm) | 6.51 | 10.81 |
Single point adsorption total pore volume (cm3/g) | 0.017 | 0.101 |
Treatments | Langmuir | Freundlich | ||||
---|---|---|---|---|---|---|
Qe (mg g−1) | KL (L mg−1) | R2 | 1/n | KF (L mg−1) | R2 | |
CK | 3.66 | 0.347 | 0.94 | 0.532 | 1.30 | 0.97 |
0.1% MIT | 3.87 | 0.283 | 0.93 | 0.588 | 1.27 | 0.98 |
0.3% MIT | 4.05 | 0.348 | 0.95 | 0.564 | 1.42 | 0.98 |
0.5% MIT | 4.30 | 0.412 | 0.95 | 0.545 | 1.62 | 0.98 |
0.5% Illite | 3.84 | 0.252 | 0.94 | 0.603 | 1.21 | 0.96 |
Dosage | Fresh Biomass (g plant−1) | Size (cm plant−1) | ||||||
---|---|---|---|---|---|---|---|---|
Root | Shoot | Leaves | Root | Shoot | Leaves | |||
Length | Diameter | Length | Width | |||||
CK | 0.24 c | 3.03 c | 1.29 c | 5.53 d | 59.13 b | 0.36 d | 6.58 d | 1.70 c |
0.1% | 0.58 bc | 4.81 b | 2.20 b | 9.45 c | 63.73 b | 0.46 c | 8.16 c | 2.21 b |
0.3% | 0.87 b | 6.37 a | 3.30 a | 11.76 b | 74.32 a | 0.51 b | 9.03 b | 2.54 ab |
0.5% | 1.91 a | 6.59 a | 3.54 a | 17.59 a | 74.37 a | 0.56 a | 10.15 a | 2.58 a |
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Huang, H.; Shi, L.; Chen, R.; Yuan, J. Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils. Sustainability 2023, 15, 4950. https://doi.org/10.3390/su15064950
Huang H, Shi L, Chen R, Yuan J. Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils. Sustainability. 2023; 15(6):4950. https://doi.org/10.3390/su15064950
Chicago/Turabian StyleHuang, Haoyong, Lin Shi, Rui Chen, and Jie Yuan. 2023. "Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils" Sustainability 15, no. 6: 4950. https://doi.org/10.3390/su15064950