Tuning active sites on biochars for remediation of mercury-contaminated soil: A comprehensive review

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 270, P. 115916 - 115916

Published: Jan. 1, 2024

Mercury (Hg) contamination is acknowledged as a global issue and has generated concerns globally due to its toxicity persistence. Tunable surface-active sites (SASs) are one of the key features efficient BCs for Hg remediation, detailed documentation their interactions with metal ions in soil medium essential support applications functionalized BC remediation. Although specific active site exhibits identical behavior during adsorption process, systematic syntheses various crucial promote biochars Hence, we summarized BC's impact on mobility soils discussed potential mechanisms role SASs including oxygen-, nitrogen-, sulfur-, X (chlorine, bromine, iodine)- functional groups (FGs), surface area, pores pH. The review also categorized synthesis routes introduce oxygen, nitrogen, sulfur surfaces enhance adsorptive properties. Last but not least, direct (e.g., Hg- binding) indirect (i.e., significant cycling thus Hg-soil that can be used explain adverse effects plants microorganisms, well other related consequences risk reduction strategies were highlighted. future perspective will focus multiple heavy remediation applications; hence, work should designing intelligent/artificial purposes.

Language: Английский

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Unlocking the potential of biochar in the remediation of soils contaminated with heavy metals for sustainable agriculture

Functional Plant Biology, Journal Year: 2024, Volume and Issue: 51(2)

Published: Feb. 4, 2024

Agricultural soils contaminated with heavy metals (HMs) impose a threat to the environmental and human health. Amendment biochar could be an eco-friendly cost-effective option decrease HMs in soil. This paper reviews application of as soil amendment immobilise We discuss technologies its preparation, their specific properties, effect on bioavailability HMs. Biochar stabilises soil, enhance overall quality significantly reduce HM uptake by plants, making it remediation for contamination. enhances physical (e.g. bulk density, structure, water holding capacity), chemical cation exchange capacity, pH, nutrient availability, ion exchange, complexes), biological properties microbial abundance, enzymatic activities) also fertility, improves plant growth, reduces availability Various field studies have shown that from while increasing crop yield. The review highlights positive effects reducing soils. Future work is recommended ensure biochars offer safe sustainable solution remediate

Language: Английский

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Soil structural stability improvement using arbuscular mycorrhizal fungi and biochar in water repellent and non‐water repellent soil

Soil Use and Management, Journal Year: 2025, Volume and Issue: 41(1)

Published: Jan. 1, 2025

Abstract Soil hydrophobicity has increased in recent years due to the expansion of arid lands. In these lands soil inoculation with arbuscular mycorrhizal fungi (AMF) and application biochar are two improvement strategies. The formation stability aggregates can be significantly influenced by management practices. present study, simultaneous effect sugarcane (0%, 1% 2%) AMF (+AMF −AMF) on water repellent (WR) non‐water (NWR) structure was investigated under corn cultivation greenhouse. Incorporation 2% into NWR organic carbon 155% 94% non‐AMF treatments, respectively, compared control (without biochar). However, this increase less pronounced WR soil. difference carbohydrate concentration between treatments enhanced increasing level from 25% 144% 51% 147% results indicated that interaction had a significant positive both microbial respiration glomalin concentration. To measure aggregate stability, high‐energy moisture characteristic curve (HEMC) method used. effects structural indices were observed studied soils. their interactive effects. Two percent soil, limited 73%. While, improved 13.4% 19.7% wettability consequently better activities. Finally, addition activities characteristics, is also effective improving studies managements.

Language: Английский

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The potential of biochar incorporation into agricultural soils to promote sustainable agriculture: insights from soil health, crop productivity, greenhouse gas emission mitigation and feasibility perspectives—a critical review

Reviews in Environmental Science and Bio/Technology, Journal Year: 2024, Volume and Issue: 23(4), P. 1105 - 1130

Published: Nov. 11, 2024

Language: Английский

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Review on biochar as a sustainable green resource for the rehabilitation of petroleum hydrocarbon-contaminated soil

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 941, P. 173679 - 173679

Published: June 5, 2024

Language: Английский

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Sub-Supercritical Hydrothermal Liquefaction of Lignocellulose and Protein-Containing Biomass

Fuels, Journal Year: 2024, Volume and Issue: 5(1), P. 75 - 89

Published: Feb. 26, 2024

Hydrothermal liquefaction (HTL) is an emerging technology for bio-crude production but faces challenges in determining the optimal temperature feedstocks depending on process mode. In this study, three feedstocks—wood, microalgae spirulina (Algae Sp.), and hydrolysis lignin were tested sub-supercritical HTL at 350 400 °C through six batch-scale experiments. An alkali catalyst (K2CO3) was used with wood lignin, while e Sp.) liquefied without catalyst. Further, two experiments conducted a Continuous Stirred Tank Reactor (CSTR) which provided batch versus continuous comparison. Results showed Algae Sp. had higher yields, followed by lignin. The subcritical of yielded more biocrude from all than supercritical range. At °C, significant change occurred maximum percentage solids. Additionally, state gave values Higher Heating Values (HHVs) greater amount volatile matter bio-crude. Gas Chromatography Mass Spectrometry (GCMS) analysis revealed that phenols dominated composition derived whereas exhibited percentages N-heterocycles amides. aqueous phase Total Organic Carbon (TOC) range 7 to 22 g/L, displaying Nitrogen (TN) content, ranging 11 13 g/L. pH levels samples consistently within alkaline range, except Wood Cont. 350. broader perspective, proved be advantageous enhancing yield, improved quality

Language: Английский

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Non-wood-based biochars as promising and eco-friendly adsorbents for chromium hexavalent Cr (VI) removal from aquatic systems: state-of-the-art, limitations, and potential future directions

Environmental Pollutants and Bioavailability, Journal Year: 2024, Volume and Issue: 36(1)

Published: Aug. 14, 2024

Chromium exists from both natural geological processes and human actions, it has a substantial impact on health ecosystems. This study addresses the major challenges in using biochar as an environmentally friendly, sustainable, economical sorbent for removing chromium hexavalent throughout remediation process. The results exhibited that produced non-woody feedstocks pyrolyzed at (300°C −700°C) significantly large amount of various functional groups, higher pH (7 to 11.10) CEC (27 21.70 cmol kg−1), greater surface area (2–300 m2g−1), O/C H/C ratios with increasing carbonization temperature, adsorption capacities (1.63 435 mg g) superior performance removal compared biochars woody-biomass. use equilibrium isotherm, thermodynamic, kinetic models aids comprehending interactions between biochar, well their processes.

Language: Английский

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Analysis of the Synergistic Effect of Endophytic Bacteria and Metabolites on Yield in Soybean Roots Under Biochar with Nitrogen Fertilization

Agronomy, Journal Year: 2025, Volume and Issue: 15(1), P. 177 - 177

Published: Jan. 13, 2025

The appropriate application of nitrogen fertilizers and biochar to the soil is beneficial for soybean growth, a combination can improve low-nitrogen fertilizer utilization efficiency. However, effect on roots still unclear. Therefore, in this study, we investigate changes endophytic bacterial communities metabolites under different combinations treatments by setting fertilization levels using high-throughput sequencing non-targeted metabolomics techniques. results showed that applying 20 t/ha 180 kg/ha (C2N1) resulted highest yield. By studying community roots, it was observed dominant phyla were Proteobacteria, Bacteroidota, Actinobacteriota, genera Bradyrhizobium, Streptomyces, Rhizobacter. Moreover, metabolic pathway analysis revealed glycosylphosphatidylinositol (GPI)-anchor biosynthesis most significant C0N1 vs. C0N0 comparison group, glycerophospholipid metabolism C2N1 C1N1 group; they both associated with regulatory mechanisms such as plant growth promotion nutrient cycling. Structural equation modeling indicates bacteria have positive impact Bradyrhizobium Rhizobium are observable variables effects bacteria, while Phe-Thr 7-allyloxycoumarin metabolites. Endophytic not only direct crop yield, but also indirectly affect yield through their This study has important scientific value guiding significance improving yields.

Language: Английский

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Advancements in Biochar for Soil Remediation of Heavy Metals and/or Organic Pollutants

Materials, Journal Year: 2025, Volume and Issue: 18(7), P. 1524 - 1524

Published: March 28, 2025

The rapid industrialization and economic growth have exacerbated the contamination of soils with both heavy metals organic pollutants. These persistent contaminants pose substantial threats to ecosystem integrity human health due their long-term environmental persistence potential for bioaccumulation. Biochar, its high specific surface area, well-developed pore structure, abundant functional groups, has emerged as a promising material remediating contaminated by While some research explored role biochar in soil remediation, several aspects remain under investigation. Fully harnessing remediation is critical importance. This review provides an overview preparation methods physicochemical properties biochar, discusses application compounds and/or metals, examines mechanisms underlying interaction Additionally, it summarizes toxicity assessments during outlines future directions, offering scientific insights references practical deployment pollution remediation.

Language: Английский

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Comparative effectiveness of pristine and H3PO4-modified biochar in combination with bentonite to immobilize cadmium in a calcareous soil

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 24, 2025

Some agricultural soils are contaminated with potentially toxic elements (PTEs) like Cd, necessitating remediation to safeguard the food chain. However, a research gap exists regarding combined use of biochar and clay minerals, particularly phosphoric acid-modified bentonite (an abundant cost-effectiveness mineral in Iran) for Cd immobilization calcareous soils. A 90-day factorial incubation study tested three levels (0% wt. (B0), 1% (B1), 2% (B2) wt.) five biochars treatments (control, unmodified/H3PO4-modified coffee grounds [G/GH] municipal solid waste [M/MH], soil. The results analytical techniques (SEM-EDX, FTIR, sequential extraction, EDTA-desorption kinetics) indicated that application G (B1, B2) increased concentration water-soluble exchangeable fraction (WsEx) by 12.9% 60.3% compared using alone. In contrast, synergistic effect on was observed between M bentonite. + B2 treatment reduced EDTA-desorbed 18.7% exhibited slowest release rate according power function kinetic model. This due transfer from bioavailable form more stable fractions iron-manganese oxides residual forms, through soil pH phosphorus levels. Overall, unmodified were effective at stabilizing than those modified acid, likely an increase pH. conclusion, combination level most Long-term field-scale plants is needed confirm these results.

Language: Английский

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