Microorganisms and their metabolites affect the content of polycyclic aromatic hydrocarbons and their derivatives in pyrolyzed material

Review Materials Science, Multidisciplinary

Multifunctional applications of biochar beyond carbon storage

Nanthi Bolan et al.

Summary: Biochar is a charred material with high surface area and abundant functional groups produced by pyrolysis, and it has multifunctional values when applied in soil, but may also lead to unintended consequences.

INTERNATIONAL MATERIALS REVIEWS (2022)

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Article Multidisciplinary Sciences

Effects of physical, chemical, and biological ageing on the mineralization of pine wood biochar by a Streptomyces isolate

Nayela Zeba et al.

Summary: This study investigated the effects of weathering or ageing on biochar carbon mineralization. The results showed that low temperature aged biochar is more susceptible to biological degradation by soil microbes, which has implications for long term carbon storage in soils.

PLOS ONE (2022)

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Article Environmental Sciences

Low bioavailability of derivatives of polycyclic aromatic hydrocarbons in biochar obtained from different feedstock

Agnieszka Krzyszczak et al.

Summary: In recent years, there has been significant progress in the study of thermal transformation of waste into valuable materials such as biochar. High-temperature processes can lead to the formation of toxic polycyclic aromatic hydrocarbons (PAHs). However, the pyrolysis process can also result in the formation of derivatives containing oxygen, nitrogen, or sulfur, which may have higher toxicity than parent PAHs. The bioavailability of PAHs is an important parameter in the agricultural application of carbonaceous materials.

ENVIRONMENTAL RESEARCH (2022)

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Article Engineering, Environmental

Long-term physical and chemical aging of biochar affected the amount and bioavailability of PAHs and their derivatives

Agnieszka Krzyszczak et al.

Summary: Applying biochar to the soil can enhance soil properties and crop productivity. However, it may contain potentially toxic compounds. This study found that long-term aging affects the physicochemical properties of biochar and significantly increases the bioavailability of toxic compounds.

JOURNAL OF HAZARDOUS MATERIALS (2022)

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Article Chemistry, Analytical

Formation of polycyclic aromatic hydrocarbons and their derivatives in biochars: The effect of feedstock and pyrolysis conditions

Agnieszka Krzyszczak et al.

Summary: The research investigates the effect of pyrolysis temperature on the formation of PAHs and their derivatives in biochars, showing that temperature and feedstock types affect the content and types of bioavailable PAHs. The study also reveals varying levels of toxic compounds in biochars derived from different sources, with potential limitations on their agricultural applications.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2021)

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Article Environmental Sciences

Biochars ages differently depending on the feedstock used for their production: Willow- versus sewage sludge-derived biochars

Anna Siatecka et al.

Summary: The study investigated the effect of abiotic aging of biochars on their physicochemical properties and stability under controlled laboratory conditions. It was found that the properties of biochars changed with different aging temperatures and incubation periods, influenced by the type of feedstock and production temperature. All biochars were oxidized to some extent during aging, leading to an increase in surface oxygen functional groups, enhanced hydrophilicity, and decreased pH.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Review Environmental Sciences

Association of biochar properties with changes in soil bacterial, fungal and fauna communities and nutrient cycling processes

Zhongmin Dai et al.

Summary: Biochar has important effects on soil microorganisms, influencing their growth, diversity, and community structure by directly providing growth stimulants or indirectly altering soil properties. The porous structure, labile C, high pH, and electrochemical properties of biochar are crucial in determining soil microbial abundance, community composition, and their impact on nitrogen and phosphorus cycling processes.

BIOCHAR (2021)

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Article Engineering, Environmental