Biochar Aging: Mechanisms, Physicochemical Changes, Assessment, And Implications for Field Applications

Environmental Science & Technology, Год журнала: 2020, Номер 54(23), С. 14797 - 14814

Опубликована: Ноя. 3, 2020

Biochar has triggered a black gold rush in environmental studies as carbon-rich material with well-developed porous structure and tunable functionality. While much attention been placed on its apparent ability to store carbon the ground, immobilize soil pollutants, improve fertility, temporally evolving situ performance these roles must not be overlooked. After field application, various factors, such temperature variations, precipitation events microbial activities, can lead fragmentation, dissolution, oxidation, thus causing drastic changes physicochemical properties. Direct monitoring of biochar-amended soils provide good evidence temporal evolution, but this requires long-term trials. Various artificial aging methods, chemical wet–dry cycling mineral modification, have therefore designed mimic natural mechanisms. Here we evaluate science biochar aging, critically summarize aging-induced properties, offer state-of-the-art for simulation approaches. In addition, implications are also considered regarding potential development deployment amendment. We suggest that improved prediction, methods shift from qualitative quantitative Furthermore, preaging may serve synthesize engineered biochars green sustainable applications.

Язык: Английский

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Analysis of the long-term effectiveness of biochar immobilization remediation on heavy metal contaminated soil and the potential environmental factors weakening the remediation effect: A review

Ecotoxicology and Environmental Safety, Год журнала: 2020, Номер 207, С. 111261 - 111261

Опубликована: Сен. 17, 2020

Currently, the research and application of biochar in remediation heavy metal contaminated soil has become a hotspot, especially regarding agricultural land. Biochar been proved to be effective reducing content available metals as well plants. However, long-term effectiveness immobilization not widely studied. In this review, retrospective search was carried out on published literature results concerning effects different areas recent years, its field (several years), some potential abiotic biotic factors that may weaken biochar. This indicate that: (1) is used excellent effect. (2) Most demonstrate effect for 2–3 years or according few even 5 years. there have various reports claiming decreases with time. (3) Abiotic such acid rain, flooded environment, changes condition (pH, redox dissolved organic matter) (Cl− alkali leaching) can significantly (4) Biotic plant roots, earthworms microorganisms also reduce Therefore, experiments having longer time span need further out, developmental modified more stable needs attention.

Язык: Английский

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Stabilization of lead and cadmium in soil by sulfur-iron functionalized biochar: Performance, mechanisms and microbial community evolution

Journal of Hazardous Materials, Год журнала: 2021, Номер 425, С. 127876 - 127876

Опубликована: Ноя. 25, 2021

Язык: Английский

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Biochar composites: Emerging trends, field successes and sustainability implications

Soil Use and Management, Год журнала: 2021, Номер 38(1), С. 14 - 38

Опубликована: Май 31, 2021

Abstract Engineered biochars are promising candidates in a wide range of environmental applications, including soil fertility improvement, contaminant immobilization, wastewater treatment and situ carbon sequestration. This review provides systematic classification these novel biochar composites identifies the future trends composite research application. It is proposed that metals, minerals, layered double hydroxides, carbonaceous nanomaterials microorganisms enhance performances via distinct mechanisms. In this review, four identified assessed critically. Firstly, facile synthesis methods, particular ball milling co‐pyrolysis, have emerged as popular fabrication strategies suitable for large‐scale applications. Secondly, modification with green materials, such natural clay minerals microorganisms, align well on‐going sustainable remediation (GSR) movement. Furthermore, new applications health improvement climate change mitigation support realization United Nation's Sustainable Development Goals (SDGs). Finally, importance field studies getting more attention, since evidence success critically needed before

Язык: Английский

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Role of biochar toward carbon neutrality

Carbon Research, Год журнала: 2023, Номер 2(1)

Опубликована: Янв. 16, 2023

Abstract Carbon neutrality by the mid-twenty-first century is a grand challenge requiring technological innovations. Biochar, traditional soil amendment which has been used for fertility improvement and contaminant remediation, revealed new vitality in this context. In review we highlight huge potential of biochar application different fields to mitigate as high 2.56 × 10 9 t CO 2 e total greenhouse gas (GHG) emissions per year, accounting 5.0% global GHG emissions. Soil applications either controlled-release fertilizer or an immobilization agent offer improved health while simultaneously suppressing CH 4 N O. Non-soil also contribute carbon unique ways. Firstly, ruminant feed decreases via physical sorption enhanced activities methanotrophs. Secondly, can be green catalyst biorefinery. Besides, additive Portland cement low impact development (LID) infrastructure lowers footprint builds resilience climate change. Furthermore, novel batteries supercapacitors energy storage purposes. Finally, adsorption capacity makes it possible being sorbent capture, utilization, (CCUS). We advocate that future research should further explore effectiveness systems change mitigation large scale applications, assess economic social viability local combat Graphical

Язык: Английский

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Contaminant containment for sustainable remediation of persistent contaminants in soil and groundwater

Journal of Hazardous Materials, Год журнала: 2023, Номер 455, С. 131575 - 131575

Опубликована: Май 6, 2023

Contaminant containment measures are often necessary to prevent or minimize offsite movement of contaminated materials for disposal other purposes when they can be buried left in place due extensive subsurface contamination. These include physical, chemical, and biological technologies such as impermeable permeable barriers, stabilization solidification, phytostabilization. is advantageous because it stop contaminant plumes from migrating further allow pollutant reduction at sites where the source inaccessible cannot removed. Moreover, unlike options, do not require excavation substrates. However, regular inspections monitor mobilization migration. This review critically evaluates sources persistent contaminants, different approaches remediation, various physical-chemical-biological processes containment. Additionally, provides case studies operations under real simulated field conditions. In summary, essential preventing contamination reducing risks public health environment. While periodic monitoring necessary, benefits make a valuable remediation option methods feasible.

Язык: Английский

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Remediation of Cd(II), Zn(II) and Pb(II) in contaminated soil by KMnO4 modified biochar: Stabilization efficiency and effects of freeze–thaw ageing

Chemical Engineering Journal, Год журнала: 2024, Номер 487, С. 150619 - 150619

Опубликована: Март 22, 2024

Язык: Английский

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Possible application of stable isotope compositions for the identification of metal sources in soil

Journal of Hazardous Materials, Год журнала: 2020, Номер 407, С. 124812 - 124812

Опубликована: Дек. 10, 2020

Язык: Английский

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Integrated Life Cycle Assessment for Sustainable Remediation of Contaminated Agricultural Soil in China

Environmental Science & Technology, Год журнала: 2021, Номер 55(17), С. 12032 - 12042

Опубликована: Авг. 9, 2021

Agricultural land degradation is posing a serious threat to global food security. Restoration of the degraded has traditionally been viewed as an inherently sustainable practice; however, restoration processes render consequential environmental impacts which could potentially exceed benefit itself. In present study, integrated life cycle assessment analysis was conducted evaluate primary, secondary, and tertiary associated with contaminated agricultural land. The results demonstrated importance including spatially differentiated managing growing crops. Comparing four risk management scenarios at field in Southern China, it found that primary secondary followed order no action > chemical stabilization phytoextraction alternative planting. However, when were taken into account, planting rendered much higher footprint comparison stabilization, provides evidence against emerging notion held by some policy makers. Furthermore, assuming loss rice paddy China compensated deforested Amazon rainforest, total impact would far action, resulting 687 ton CO2-e ha–1 climate change impact. Overall, study new research findings support more holistic making also sheds lights on future development various technologies.

Язык: Английский

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Simultaneous reduction and immobilization of Cr(VI) in seasonally frozen areas: Remediation mechanisms and the role of ageing

Journal of Hazardous Materials, Год журнала: 2021, Номер 415, С. 125650 - 125650

Опубликована: Март 18, 2021

Язык: Английский

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