Enhancing the Phytoextraction of Cd, Cu, Pb, and Zn by Portulaca oleracea in a Heavily Contaminated Soil Using Low Molecular Weight Organic Substances: Is Phytoremediation Viable?

Earth Systems and Environment, Journal Year: 2024, Volume and Issue: 8(3), P. 923 - 936

Published: April 22, 2024

Abstract Phytoremediation can be accelerated if contaminated soils are amended with releasing agents. We tested four such materials, citric acid (CA), EDTA, oxalic (OA), and tartaric (TA) at two doses, 20 40 mmol kg −1 , in a pot experiment to heavily soil cultivated purslane ( Portulaca oleracea ). found that Cd extracted DTPA remained unchanged all treatments compared the control except for treatment of added EDTA (“EDTA-40”). Similar was case Cu, Pb, Zn. As consequence, aboveground plant material increased significantly from 1.21 (control) 3.84 EDTA-40 3.55 EDTA-20 (mg other metals, Pb exhibiting an impressive fivefold increase 280.35 mg control. conclude most successful agent among those tested, especially However, we come conclusion that, based on calculations required time meaningfully reduce metals contents, phytoremediation is not practical option extremely metal-elevated soils. These findings should verified under field conditions.

Language: Английский

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Remediation of emerging inorganic contaminants in soils and water using pristine and engineered biochar: a review

Biochar, Journal Year: 2025, Volume and Issue: 7(1)

Published: Feb. 18, 2025

Language: Английский

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Remediation of Coastal Wetland Soils Co-Contaminated with Microplastics and Cadmium Using Spartina alterniflora Biochar: Soil Quality, Microbial Communities, and Plant Growth Responses

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 877 - 877

Published: March 31, 2025

Biochar, an eco-friendly soil amendment, holds promise for remediating contaminated soils, yet its impacts on coastal wetland soils under combined microplastic (MP) and heavy metal (HM) pollution remain underexplored. This study examined the efficacy of 2% Spartina alterniflora-derived biochar (BC) in rehabilitating co-contaminated with cadmium (Cd) two MPs—polyethylene (PE) polylactic acid (PLA)—at 0.2% (w/w). The results indicated that significantly elevated pH (8.35–8.43) restored electrical conductivity (EC) to near-control levels, while enhancing organic matter content (up 130% PLA-contaminated soils), nutrient availability (e.g., phosphorus, potassium), enzyme activity. Biochar reduced bioavailable Cd by 14–15% through adsorption ion exchange. Although bacterial richness diversity slightly declined, reshaped microbial communities, enriching taxa linked pollutant degradation Proteobacteria, Bacteroidota) upregulated functional genes associated carbon, nitrogen, sulfur cycling. Additionally, boosted Suaeda salsa (S. salsa) biomass 0.72 g/plant A1B) height 14.07 cm E1B) reducing accumulation (29.45% shoots) translocation. Remediation efficiency was most pronounced PLA. These findings bridge critical knowledge gaps biochar’s role complexly polluted wetlands validate potential sustainable restoration.

Language: Английский

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Limiting the mobility and phytoavailability of cadmium in paddy-upland soils after the application of various biochar fractions and proportions

Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 295, P. 118124 - 118124

Published: April 1, 2025

This study delves into the pivotal role of biochar particle size and addition ratio in mitigating cadmium (Cd) contamination paddy-upland soils, with a specific focus on curbing Cd uptake by Chinese cabbage (Brassica chinensis L.) during transition from paddy to upland cultivation. Through meticulously designed laboratory experiment, we uncovered that biochar's adsorption capacity for soil is markedly lower than its maximum adsorptive as determined kinetics, potentially due competitive other cationic species present soil. insight underscores critical need optimize application rates Cd-contaminated soils effectively modulate phytoavailability. Furthermore, our findings demonstrate not only converts non-residual fractions more stable "residual Cd" form but also diminishes Notably, fine (Φ3 < 0.25 mm) at 10 % rate was particularly efficacious, reducing concentration 28.2 %, equivalent approximately 1.79 mg/kg. research introduces novel perspective biochar-mediated remediation contamination, emphasizing influence regulating phytoavailability enhancing food safety agricultural under rotation cultivation affected contamination.

Language: Английский

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Recent trends in environmental sustainability

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(44), P. 99198 - 99201

Published: Aug. 22, 2023

Language: Английский

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