Research Progress on Structural Characteristics, Structure-Application Relationships, and Environmental Application of Biochar-Supported Zero Valent Iron (ZVI-BC)

Li, Fengmin; Wang, Xiao; Xu, Congcong

doi:10.1007/s40726-023-00260-z

Cited by 3 publications

(1 citation statement)

References 146 publications

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“…Ions can also be adsorbed at the edges of the clay crystal lattice and exchange with other ions in the water/sediment (Patel et al 2008). In the few last years, researchers have been using biochar (BC) as a supporter of nZVI for improving his dispersibility, due to BC porous structure, high adsorption capacity, and high specific surface area (Wang et al 2017;Li et al 2022Li et al , 2023. Some studies showed that BC on nZVI effectively enhances the removal efficiencies of pollutants (Liu et al 2021;Ahmad et al 2022).…”

Section: Introductionmentioning

confidence: 99%

A novel co-contaminated sediment treatment approach: Quercus petraea leaf-extracted nZVI supported on native clay and biochar for potentially toxic elements and PAHs removal

Slijepčević,

Rađenović,

Beljin

et al. 2023

J Soils Sediments

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Purpose Sediment contamination is complex, and it is challenging to find the solution that corresponds to treating different groups of pollutants effectively. The existence of potentially toxic elements and polycyclic aromatic hydrocarbons in cocontaminated river sediment contributes serious toxic residues to the environment. Thus, it is crucial to involve remediation techniques that simultaneously remove these two complex groups of pollutants. Also, a significant challenge is due to the complex interactions between these groups of contaminants and the sediment matrix. Methods Iron-based materials, such as green produced nano-zero-valent iron, are advantageous, environmentally friendly, and interest in their use is growing. This study demonstrates the potential of green nZVI supported by native clay and biochar for the simultaneous removal of potentially toxic elements and PAHs from co-contaminated river sediment. Results It was indicated that potentially toxic elements removal was better than the removal of PAHs, but the removal of both groups of contaminants was noticeable with no further impact to the environment. The results showed which mechanisms played key roles in removal of pollutants from the river sediment. Additionally, extraction tests showed that sediment treated with modified iron nanoparticles is non-hazardous and that it represented promising results in removal of organic and inorganic pollutants. Conclusion Green synthesis of nZVI by oak leaf extract (Quercus petraea) and supported materials (native clay and biochar) was valuable for recycling wastes and creating treated sediment for potential further beneficial sustainable use.

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Section: Introductionmentioning

confidence: 99%

A novel co-contaminated sediment treatment approach: Quercus petraea leaf-extracted nZVI supported on native clay and biochar for potentially toxic elements and PAHs removal

Slijepčević,

Rađenović,

Beljin

et al. 2023

J Soils Sediments

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Responses of nitrobenzene removal performance and microbial community by modified biochar supported zerovalent iron in anaerobic soil

Hainan,

Peng,

Qingqing

et al. 2024

Sci Rep

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Biochar-supported ZVI have received increasing attention for their potential to remove nitrobenzene in groundwater and soil. However, the capacity of this material to enhance the biological reduction of nitrobenzene and alter microbial communities in anaerobic groundwater have not been explored. In this study, the nitrobenzene removal performance and mechanism of modified biochar-supported zerovalent iron (ZVI) composites were explored in anaerobic soil. The results showed that the 700 °C biochar composite enhanced the removal of nitrobenzene and inhibited its release from soil to the aqueous phase. NaOH-700-Fe50 had the highest removal rate of nitrobenzene, reaching 64.4%. However, the 300 °C biochar composite inhibited the removal of nitrobenzene. Microbial degradation rather than ZVI-mediated reduction was the main nitrobenzene removal pathway. The biochar composites changed the richness and diversity of microbial communities. ZVI enhanced the symbiotic relationship between microbial genera and weakened competition between soil microbial genera. In summary, the 700 °C modified biochar composite enhanced the removal of nitrobenzene by increasing microbial community richness and diversity, by upregulating functional genes, and by promoting electron transfer. Overall, the modified biochar-supported ZVI composites could be used for soil remediation, and NaOH-700-Fe50 is a promising composite material for the on-site remediation of nitrobenzene-contaminated groundwater.

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nZVI@BC as a Soil Amendment and Its Effects on Potted Rice Growth and Soil Properties

Xiang,

Zheng,

Zhou

et al. 2024

Agronomy

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This study investigated the effects of nano zero-valent iron-modified biochar (nZVI@BC) as a soil amendment on potted rice growth, soil properties, and heavy metal dynamics. Seven treatments with varying amounts of soil conditioner, biochar, and nZVI@BC were applied to potted rice. Results showed that nZVI@BC application significantly improved rice agronomic traits, with the 15 g·kg−1 treatment increasing the panicle formation rate by 15% and 100-grain weight by 8% compared to the control. Soil fertility was enhanced, with available phosphorus increasing from 137 to 281 mg·kg−1 in the most effective treatment. Heavy metal analysis revealed that nZVI@BC application did not increase soil heavy metal content, with Cd levels remaining below 0.3 mg·kg−1 across treatments. Notably, the 10 g·kg−1 nZVI@BC treatment showed potential for slight Cd immobilization, reducing its concentration from 0.32 to 0.26 mg·kg−1. Microbial community analysis showed that nZVI@BC altered soil microbial diversity and composition, with the 10 g·kg−1 treatment resulting in the highest fungal diversity (Chao1 index: 294.219). The relative abundance of the beneficial fungal class Agaricomycetes increased from 40% to 55% with optimal nZVI@BC application. These findings suggest that nZVI@BC has potential as an effective soil amendment for improving rice cultivation while maintaining soil health, microbial diversity, and potentially mitigating heavy metal contamination.

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Research Progress on Structural Characteristics, Structure-Application Relationships, and Environmental Application of Biochar-Supported Zero Valent Iron (ZVI-BC)

Cited by 3 publications

References 146 publications

A novel co-contaminated sediment treatment approach: Quercus petraea leaf-extracted nZVI supported on native clay and biochar for potentially toxic elements and PAHs removal

A novel co-contaminated sediment treatment approach: Quercus petraea leaf-extracted nZVI supported on native clay and biochar for potentially toxic elements and PAHs removal

Responses of nitrobenzene removal performance and microbial community by modified biochar supported zerovalent iron in anaerobic soil

nZVI@BC as a Soil Amendment and Its Effects on Potted Rice Growth and Soil Properties

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