The effect of a biochar temperature series on denitrification: which biochar properties matter?

Weldon, Simon; Rasse, Daniel P.; Budai, Alice; Tomić, Oliver; Dörsch, Peter

doi:10.1016/j.soilbio.2019.04.018

Cited by 52 publications

(26 citation statements)

References 70 publications

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“…It is worth to investigate the relationship between the preparation method/conditions, the feedstock, the microstructure and the biochar stability over decades. Many techniques can be used to assess the biochar mineralization over time such as infrared spectroscopy, biomarkers, nuclear magnetic resonance among others (Weldon et al 2019;Medyńska-Juraszek et al 2020). However, one cannot omit the ecotoxicological effects that may arise from the mineralization from the biochar itself.…”

Section: Economic and Environmental Benefit Analysesmentioning

confidence: 99%

Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater

Ambaye

Vaccari

Hullebusch

et al. 2020

Int. J. Environ. Sci. Technol.

337

109

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Currently, due to the rapid growth of urbanization and industrialization in developing countries, a large volume of wastewater is produced from industries that contain chemicals generating high environmental risks affecting human health and the economy if not treated properly. Consequently, the development of a sustainable low-cost wastewater treatment approach has attracted more attention of policymakers and scientists. The present review highlights the recent applications of biochar in removing organic and inorganic pollutants present in industrial effluents. The recent modes of preparation, physicochemical properties and adsorption mechanisms of biochar in removing organic and inorganic industrial pollutants are also reviewed comprehensively. Biochar showed high adsorption of industrial dyes up to 80%. It also discusses the recent application and mechanism of biochar-supported photocatalytic materials for the degradation of organic contaminants in wastewater. We reviewed also the possible optimizations (such as the pyrolysis temperature, solution pH) allowing the increase of the adsorption capabilities of biochar leading to organic contaminants removal. Besides, increasing the pyrolysis temperature of the biochar was seen to lead to an increase in its surface area, while it decreases their amount of oxygen-containing functional groups, consequently leading to a decrease in the adsorption of metal (loid) ions present in the medium. Finally, the review suggests that more research should be carried out to optimize the main parameters involved in biochar production and its regeneration methods. Future efforts should be also carried out towards process engineering to improve its adsorption capacity to increase the economic benefits of its implementation.

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Section: Economic and Environmental Benefit Analysesmentioning

confidence: 99%

Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater

Ambaye

Vaccari

Hullebusch

et al. 2020

Int. J. Environ. Sci. Technol.

337

109

View full text Add to dashboard Cite

show abstract

“…In addition, acid functional groups and labile C are present on the surface of biochar produced at low temperature and this type of biochar normally adsorbs more NH 4 + in comparison with biochar produced at high temperature [32]. Probably, the labile C content of low-temperature biochar may contribute to immobilising N in the mineral soil [33]. The application of biochar accelerates soil N transformations in the short term with increased N bioavailability through N mineralisation of recalcitrant pools, followed by immobilisation of NH 4 + in the labile soil organic N pool [22].…”

Section: Biochar Impact On N Immobilisation and Mineralisationmentioning

confidence: 99%

“…An example of these interactions is the inhibition of the nitrification process and the reduction of denitrifiers activity due to an increase in soil moisture and aeration of soil caused by biochar application [44,45]. Concerning the suppression of N 2 O emission from denitrification, the ideal biochar properties are high carbonisation degree, high pH and large surface area [33]. Besides to reduce N 2 O emission, biochar must be applied in adequate proportion with N fertiliser to ensure a C/N ratio greater than 60 [46].…”

Section: Biochar As An Electron Shuttle and Its Influence On N 2 O Emmentioning

confidence: 99%

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

Jindo

Audette

Higashikawa

et al. 2020

Chem. Biol. Technol. Agric.

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Recently, biochar has been widely used for versatile applications in agriculture and environment sectors as an effective tool to minimise waste and to increase the efficiency of circular economy. In the present work, we review the current knowledge about biochar role in N, P and K cycles. Ammonia volatilisation and N 2 O emission can be reduced by biochar addition. The content of available P can be improved by biochar through enhancement of solubilisation and reduction in P fixation on soil mineral, whilst high extractable K in biochar contributes to K cycle in soil. Liming effect and high CEC are important properties of biochars improving beneficial interactions with N, P and K soil cycle processes. The effectiveness of biochar on N, P and K cycles is associated with biochar properties which are mainly affected by feedstock type and pyrolysis condition.

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“…The presence of micropores smaller than 0.5 nm appears to promote additional biochar-chemical interactions (e.g., chemical sorption and desorption) (Weldon et al 2019;Yargicoglu et al 2015). Serafin et al (2017) noticed that micropores in the range of 0.3-0.6 nm were effective for CO 2 adsorption and the highest adsorbed amount of CO 2 was equal to 1.25 mmol CO 2 /g.…”

Section: Biochar Alonementioning

confidence: 99%

Biochar insights from laboratory incubations monitoring O2 consumption and CO2 production

Almeida

Spokas

Teixeira

et al. 2019

Biochar

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Biochar has been touted as a long-term carbon sequestration tool. However, there are no studies evaluating biochar's effect on oxygen (O 2) consumption as a measure of the microbial respiration response to biochar. To gain insight into this aspect, we evaluated O 2 consumption rates to test the hypothesis that biochar is an efficient agent for carbon dioxide (CO 2) sequestration in soils. Four different biochar types and one activated charcoal were incubated alone and associated with three different soils for approximately 2 months in laboratory incubations. Headspace concentration of CO 2 and O 2 was periodically quantified. The data presented here confirm that the CO 2 production following biochar's addition to soils results in a process that is correlated to oxygen consumption. However, this overall stimulation is not clearly related to biochar type. Activated carbon resulted in the highest statistically significant stimulation of activity, despite it possessing the lowest quantity of volatile carbon and mineral nutrient sources. Taking into consideration our results, we conclude that using biochar does achieve total carbon sequestration. However, the amount of available soil organic carbon following soil incorporation appears to be reduced following biochar addition and its long-term implication on this mineralizable soil organic carbon pool does deserve more research attention.

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The effect of a biochar temperature series on denitrification: which biochar properties matter?

Cited by 52 publications

References 70 publications

Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater

Mechanisms and adsorption capacities of biochar for the removal of organic and inorganic pollutants from industrial wastewater

Role of biochar in promoting circular economy in the agriculture sector. Part 1: A review of the biochar roles in soil N, P and K cycles

Biochar insights from laboratory incubations monitoring O2 consumption and CO2 production

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