Comparative Activation Process of Pb, Cd and Tl Using Chelating Agents from Contaminated Red Soils
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.1.1. Soil Preparation
2.1.2. Preparation of Contaminated Soil
2.1.3. Experimental Reagents
2.2. Experimental Design and Operation
2.2.1. Preliminary and Dynamic Activation Experiment
2.2.2. Influence of Chelating Agent Dosage and Solution pH on the Activation Effect of Heavy Metals
2.2.3. Determination of Heavy Metal Speciations before and after Activation
2.3. Statistical Analysis and Processing Methods
3. Results
3.1. Screening of Chelating Agents and Dynamic Activation Experiment
3.2. The Effect of Chelating Agent Dosage and Solution pH on Heavy Metals Activation
3.3. Speciation Characteristics of Heavy Metals before and after Activation
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Soil Properties | Value | |
---|---|---|
Particle size | <0.002 mm (%) | 16.00 |
0.002–0.02 mm (%) | 33.00 | |
0.02–2 mm (%) | 53.00 | |
pH | 4.5 | |
Available N (mg/kg) | 37.80 | |
Available P (mg/kg) | 0.90 | |
Available K (mg/kg) | 12.10 | |
SOM (g/kg) | 15.40 | |
CEC (cmol/kg) | 3.30 | |
Total heavy metal concentration (mg/kg) | ||
Pb | 52.30 | |
Cd | 0.12 | |
Tl | 0.63 |
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Liu, L.; Luo, D.; Yao, G.; Huang, X.; Wei, L.; Liu, Y.; Wu, Q.; Mai, X.; Liu, G.; Xiao, T. Comparative Activation Process of Pb, Cd and Tl Using Chelating Agents from Contaminated Red Soils. Int. J. Environ. Res. Public Health 2020, 17, 497. https://doi.org/10.3390/ijerph17020497
Liu L, Luo D, Yao G, Huang X, Wei L, Liu Y, Wu Q, Mai X, Liu G, Xiao T. Comparative Activation Process of Pb, Cd and Tl Using Chelating Agents from Contaminated Red Soils. International Journal of Environmental Research and Public Health. 2020; 17(2):497. https://doi.org/10.3390/ijerph17020497
Chicago/Turabian StyleLiu, Lirong, Dinggui Luo, Guangchao Yao, Xuexia Huang, Lezhang Wei, Yu Liu, Qihang Wu, Xiaotao Mai, Guowei Liu, and Tangfu Xiao. 2020. "Comparative Activation Process of Pb, Cd and Tl Using Chelating Agents from Contaminated Red Soils" International Journal of Environmental Research and Public Health 17, no. 2: 497. https://doi.org/10.3390/ijerph17020497