Biochar accelerates PAHs biodegradation in petroleum-polluted soil by biostimulation strategy

Kong, Lulu; Gao, Yuanyuan; Zhou, Qixing; Zhao, Xuyang; Sun, Ze

doi:10.1016/j.jhazmat.2017.09.040

Cited by 232 publications

(55 citation statements)

References 57 publications

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“…Wood, the only biochar in which mineralization was enhanced, also had a high BET surface area but little ash or pore volume, which might explain why there was little charosphere influence on mineralization. Other studies found that biochars with high BET surface area may adversely affect hydrocarbon biodegradation in the charosphere via strong adsorption and low bioavailability (Denyes et al, 2016; Kong et al, 2018; Li et al, 2019). For example, greater surface area and porosity can influence water and nutrient retention (Atkinson et al, 2010; Lehmann et al, 2011) and stimulate microbial colonization (Jaafar et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

et al. 2019

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When soil is frozen, biochar promotes petroleum hydrocarbon (PHC) degradation, yet we still do not understand why. To investigate microbial biodegradation activity under frozen conditions, we placed 60‐μm mesh bags containing 6% (v/v) biochar created from fishmeal, bonemeal, bone chip, or wood into PHC‐contaminated soil, which was then frozen to −5°C. This created three soil niches: biochar particles, the charosphere (biochar‐contiguous soil), and bulk soil outside of the bags. After 90 d, 13C‐phenanthrene mineralization reached 55% in bonemeal biochar and 84% in bone chip biochar charosphere soil, compared with only 43% in bulk soil and 13% in bone chip biochar particles. Soil pH remained near neutral in bone chip and bonemeal biochar treatments, unlike wood biochar, which increased alkalinity and likely made phosphate unavailable for microorganisms. Generally, charosphere soil had higher aromatic degradative gene abundances than bulk soil, but gene abundance was not directly linked to 13C‐phenanthrene mineralization. In bone chip biochar‐amended soils, phosphate successfully predicted microbial community composition, and abundances of Bosea and Caulobacter increased in charosphere soil. Biochar effects on charosphere soil were dependent on feedstock material and suggest that optimizing the charosphere in bone‐derived biochars may increase remediation success in northern regions. Core Ideas 13C‐phenanthrene was mineralized in the charosphere of bone chip biochar particles. pH and nutrient availability were dependent on biochar type and sampling location. Biochar effects are localized in specific spatial niches of the soil.

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Section: Resultsmentioning

confidence: 99%

The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

et al. 2019

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“…The porous structure and rough surfaces of biochar could provide a favorable microenvironment for microbial community from adverse surroundings. Biochar could enrich bacterial abundance and enhance the aromatics biodegradation (Kong et al 2018;Qin et al 2013). In addition, oxygen-containing groups [e.g., hydroxyl (O-H) and carbonyl (C=O) groups] on biochar surfaces can act as reactive sites, that are also beneficial for pollutant degradation (Zhang et al 2018a).…”

Section: The Impact Of Biochar-wps On Organic Compound Removalmentioning

confidence: 99%

Rapid aerobic granulation using biochar for the treatment of petroleum refinery wastewater

et al. 2020

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Aerobic granular sludge technology has great potential for the treatment of petroleum refinery wastewater. However, strategies to shorten the granulation time and improvement the stability still need to be developed. In this work, biochar was prepared from waste petroleum activated sludge (biochar-WPS) and used in a sequencing batch reactor for the treatment of petroleum refinery wastewater. Biochar-WPS presented the surface area of 229.77 m2/g, pore volume of 0.28 cm3/g, H/C and O/C atomic ratios of 0.42 and 0.21, respectively. The porous structure and a high degree of hydrophilicity were found to facilitate microbial colonization and adhesion as well as particle aggregation. Application of biochar-WPS resulted in the formation of more substantial and stable aerobic granules (~ 66% of granules > 0.46 mm diameter) 15 days earlier compared with the control. The addition of biochar-WPS enhanced the average removal efficiency of chemical organic demand (~ 3%), oil (~ 4%) and total nitrogen (~ 10%) over the control. Increased microbial richness and diversity were observed within the formed granules and had an increased (~ 4%) proportion of denitrifying bacteria. These results indicate that an aerobic granulation mechanism using biochar-WPS is a feasible option for the treatment of petroleum refinery wastewater.

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“…The experiment used the potting method for ryegrass cultivation [28], and 2 kg of soil was weighed for each pot. In this pot trial, six treatments with three replicates were carried out: addition of 1% biochar (BC), addition of 1% biochar and 300 mg/kg PHE (PBC), addition of 1% Achromobacter sp.…”

Section: Soil Remediation Testmentioning

confidence: 99%

“…In this way, biochar will positively affect soil microbes, thereby accelerating the biodegradation of organic contaminants in soil. Studies have indicated that the effects of biochar on soil microbes and the dissipation of polycyclic aromatic hydrocarbons (PAHs) are signi cant [7][8][9]. As a kind of persistent environmental contaminant, PAHs can be e ciently degraded by microbes [10,11].…”

Section: Introductionmentioning

confidence: 99%

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

Li¹,

Li²,

Song³

et al. 2020

Preprint

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Background: Straw pyrolysis into biochar are beneficial for resource recovery and soil improvement. However, little is known about how biochar influences polycyclic aromatic hydrocarbons (PAHs) metabolic pathways and biogeochemical cycles in PAH-contaminated agricultural soil. Here we assessed the influence of biochar and bacterial inoculant on the soil physicochemical properties, the microorganisms involved in the metabolism of PAH and C, N, P and S cycling.Results: The addition of biochar and bacterial inoculant improved soil fertility and crop nutrition. The community metabolism of phenanthrene was revealed by modeling a gene network based on shotgun metagenomes. Biochar addition in soil promoted the abundance of various phenanthrene-degrading microorganisms involved in multiple steps of phenanthrene catabolism, thereby promoting phenanthrene degradation. Meanwhile, biochar addition increased nitrate reduction and degradation of relatively easily decomposable organic carbon, including cellulose, but it also inhibited lignin and chitin degradation and C and N fixation, while the addition of bacterial inoculant partially mitigated biochar’s inhibitory effects in element cycle and inhibited N2O emission, which alleviated the greenhouse effect.Conclusions: When bioremediating PAH-contaminated soil, recommendation is to use biochar combined with functional microorganism. This work contributes to expand the current knowledge of the treatment of contaminated soil and provide some empirical evidence for the treatment of contaminated soil by biochar and bacterial inoculant.

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Biochar accelerates PAHs biodegradation in petroleum-polluted soil by biostimulation strategy

Cited by 232 publications

References 57 publications

The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

Rapid aerobic granulation using biochar for the treatment of petroleum refinery wastewater

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

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Biochar accelerates PAHs biodegradation in petroleum-polluted soil by biostimulation strategy

Cited by 232 publications

References 57 publications

The Charosphere Promotes Mineralization of 13C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

The Charosphere Promotes Mineralization of 13C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

Rapid aerobic granulation using biochar for the treatment of petroleum refinery wastewater

Impact of biochar on the metabolic networks of a PHE-degrading microbial community and its influencing mechanism on soil biogeochemical cycles

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The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils

The Charosphere Promotes Mineralization of ¹³C‐Phenanthrene by Psychrotrophic Microorganisms in Greenland Soils