Biochar co-pyrolyzed from peanut shells and maize straw improved soil biochemical properties, rice yield, and reduced cadmium mobilization and accumulation by rice: Biogeochemical investigations

Journal of Hazardous Materials, Год журнала: 2024, Номер 466, С. 133486 - 133486

Опубликована: Янв. 17, 2024

Biochar is an eco-friendly amendment for the remediation of soils contaminated with cadmium (Cd). However, little attention has been paid to influence and underlying mechanisms co-pyrolyzed biochar on bioavailability uptake Cd in paddy soils. The current study explored effects from peanut shells (P) maize straw (M) at different mixing ratios (1:0, 1:1, 1:2, 1:3, 0:1, 2:1 3:1, w/w), bacterial community fractionation soil, its by rice plant. addition, particularly P1M3 (P/M 1:3), significantly elevated soil pH cation exchange capacity, transferred mobile residual fraction, reduced availability rhizosphere soil. application decreased concentration tissues (root, stem, leaf, grain) 30.0%- 49.4%, compared control. Also, enhanced microbial diversity indices relative abundance iron-oxidizing bacteria Moreover, was more effective promoting formation iron plaque, increasing sequestration plaque than other treatments. Consequently, highest yield lowest accumulation were observed following application. This revealed feasibility applying facilitating Cd.

Язык: Английский

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Biochar-mediated remediation of uranium-contaminated soils: evidence, mechanisms, and perspectives

Biochar, Год журнала: 2024, Номер 6(1)

Опубликована: Март 1, 2024

Abstract Soil contamination by uranium presents a burgeoning global environmental concern, exerting detrimental effects on both agricultural production and soil health. Biochar, carbonaceous material derived from biomass pyrolysis, exhibits considerable potential for remediating uranium-contaminated soils. However, comprehensive review of the biochar fate accumulation in soil–plant systems remains conspicuously absent. In this paper, sources are reviewed, impact immobilization detoxification is analyzed. We reviewed status soils globally found that mining activities currently main sources. Further meta-analysis revealed addition significantly reduced bioavailability shoot accumulation, their effect value 58.9% (40.8–76.8%) 39.7% (15.7–63.8%), respectively. Additionally, enhances microenvironment, providing favourable conditions promoting plant growth reducing mobility. focused mechanisms governing interaction between uranium, emphasising roles played surface complexation, reduction, ion exchange, physical adsorption. The modification intensifying these can promote immobilisation Finally, alleviates oxidative stress reduces tissues, thereby mitigating adverse development. Overall, our highlights capacity to remediate through diverse mechanisms, valuable insights sustainable remediation. Highlights Biochar mobility variety including limits its plants. Modified has been shown enhance effectiveness immobilising uranium. application not only promotes remediation but also improves quality. Graphical

Язык: Английский

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Pristine and Fe-functionalized biochar for the simultaneous immobilization of arsenic and antimony in a contaminated mining soil

Journal of Hazardous Materials, Год журнала: 2024, Номер 469, С. 133937 - 133937

Опубликована: Март 6, 2024

Язык: Английский

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Chitin and crawfish shell biochar composite decreased heavy metal bioavailability and shifted rhizosphere bacterial community in an arsenic/lead co-contaminated soil

Environment International, Год журнала: 2023, Номер 176, С. 107989 - 107989

Опубликована: Май 24, 2023

Sustainable management of ever-increasing organic biowaste and arable soil contamination by potentially toxic elements are concern from both environmental agricultural perspectives. To tackle the waste issue crawfish shells simultaneously minimize threat arsenic (As) lead (Pb) to human health, a pot trial was conducted using chitin (CT), shell biochar (CSB), powder (CSP), CT-CSB composite compare their remediation efficiencies in As/Pb co-contaminated soil. Results demonstrated that addition all amendments decreased Pb bioavailability, with greatest effect observed for treatment. Application CSP CSB increased available As concentration, while significant decreases were CT treatments. Meanwhile, most effective enhancing enzyme activities including acid phosphatase, α-glucosidase, N-acetyl-β-glucosaminidase, cellobiohydrolase, whereas CSB-containing treatments suppressed enzymes. The altered bacterial abundance composition For instance, compared control, Chitinophagaceae 2.6-4.7%. relative Comamonadaceae 1.6% treatment, 2.1% increase noted Redundancy correlation analyses (at family level) indicated changes community structure linked bulk density, water content, availability soils. Partial least squares path modeling further chemical property (i.e., pH, dissolved carbon, cation exchange capacity) strongest predictor soils following amendment application. Overall, could be immobilizing restoring ecological functions contaminated

Язык: Английский

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Modified Biochar for Arsenic Immobilization in Soil: A Critical Review

Reviews of Environmental Contamination and Toxicology, Год журнала: 2023, Номер 261(1)

Опубликована: Авг. 23, 2023

Язык: Английский

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Biochar-supported zero-valent iron enhanced arsenic immobilization in a paddy soil: the role of soil organic matter

Biochar, Год журнала: 2024, Номер 6(1)

Опубликована: Март 19, 2024

Abstract Arsenic (As) detoxification in polluted soils by iron-based materials can be mediated the endogenous soil organic matter (SOM), nevertheless mechanisms remain unclear. Herein, SOM a paddy was substantially removed to understand its roles on As immobilization biochar-supported zero-valent iron (ZVI/BC). The results demonstrated that ZVI/BC application significantly decreased bioavailability 64.2% compared with control under anaerobic condition. XPS and HR-TEM suggested mainly invoked formation of ternary complexes (i.e., As-Fe-SOM). However, depletion compromised efficacy for 289.8%. This is likely because increased fulvic acid OH − contents soils. Besides, proportion As(III) available fraction, but altered associated As(V) reduction. That is, reduction resulted from reductive capacity ZVI pristine soil, As(V)-reducing bacteria contributed greater SOM-depleted soil. Additionally, boosted abundances Fe(III)- such as Bacillus Ammoniphilus soils, which enhanced dissimilatory arsenate Thus, this work highlighted importance remediation As-contaminated ZVI/BC. Graphical

Язык: Английский

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Hierarchically porous magnetic biochar as an amendment for wheat (Triticum aestivum L.) cultivation in alkaline Cd-contaminated soils: Impacts on plant growth, soil properties and microbiota

Chemosphere, Год журнала: 2024, Номер 352, С. 141295 - 141295

Опубликована: Фев. 1, 2024

Язык: Английский

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Remediation of Cadmium‐Contaminated Paddy Soils by Phosphorite Magnetic Biochar: A New Insight Into Soil Microbial Responses

Land Degradation and Development, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

ABSTRACT Cadmium (Cd)‐contaminated rice paddies have been a primary environmental concern worldwide. Biochar or modified biochar application favors reducing Cd availability in paddy soil, which has demonstrated physical and chemical terms. However, we know little about soil microbial responses after application. In this study, revealed the immobilization effect mechanism of fields by novel phosphorite magnetic (PMCB) from perspective response. The results suggested that PMCB facilitated conversion highly active to less reduced uptake improving physicochemical properties functional bacterial gene abundance. Compared with control, acetic acid extractable reducible contents content brown decreased 7.4%–18.4%, 16.2%–19.9%, 44.0%–47.9%, respectively, residual increased 16.3%–25.8% under treatment. A decrease sqr fccB abundances (downregulated 6.3% 12.4%, respectively) inhibited CdS oxidative dissolution 0.2% Conversely, other treatments stimulated abundant proliferation microbes (e.g., Anaeromyxobacter , Geobacter Thiobacillus ) these genes while suppressing sulfide‐producing abundance (sreA phsA 30.5%–73.4% 3.3%–11.3%, respectively). This result implies Fe(III) mineral reduction oxidation lead limited secondary release Cd. Additionally, aqueous‐phase analysis immobilized mainly coprecipitation PO 4 3− CO 3 2− (34.5%) ion exchange (32.2%), followed surface complexation (18.7%) cation π‐bonding (13.1%).

Язык: Английский

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Pros and Cons of Biochar to Soil Potentially Toxic Element Mobilization and Phytoavailability: Environmental Implications

Earth Systems and Environment, Год журнала: 2022, Номер 7(1), С. 321 - 345

Опубликована: Дек. 27, 2022

Abstract While the potential of biochar (BC) to immobilize potentially toxic elements (PTEs) in contaminated soils has been studied and reviewed, no review focused on use BC for enhancing phytoremediation efficacy PTE-contaminated soils. Consequently, overarching purpose this study is critically effects mobilization, phytoextraction, phytostabilization, bioremediation PTEs Potential mechanisms interactions between are also reviewed detail. We discuss promises challenges various approaches, including environmental implications, application The properties (e.g., surface functional groups, mineral content, ionic π-electrons) govern its impact (im)mobilization PTEs, which complex highly element-specific. This demonstrates contrary PTE mobilization highlights possible opportunities using as a mobilizing agent PTEs-contaminated

Язык: Английский

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Effect and mechanism of biochar as a support on immobilization of different heavy metals by iron oxides in a multi-contaminated soil

Journal of environmental chemical engineering, Год журнала: 2023, Номер 11(3), С. 109895 - 109895

Опубликована: Апрель 14, 2023

Язык: Английский

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