New directions and challenges in engineering biologically-enhanced biochar for biological water treatment

Jayakumar, Anjali; Wurzer, Christian; Soldatou, Sylvia; Edwards, Christine; Lawton, Linda A.; Mašek, Ondřej

doi:10.1016/j.scitotenv.2021.148977

Cited by 38 publications

(17 citation statements)

References 107 publications

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“…One of the ways of using agricultural processing waste is by obtaining activated carbons or activated charcoals (ACs) from them [ 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. The kernel shells of Prunus armeniaca were also used for obtaining activated charcoals or thermally modified sorption materials for removing pollutants from sewage waters.…”

Section: Resultsmentioning

confidence: 99%

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

et al. 2022

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For the first time, a comprehensive review of the literature data on the use of apricot (Prunus armeniaca) biomass components as a sorption material for the treatment of wastewater and environmental water from various pollutants is carried out in the present study. In addition to a comprehensive analysis of contemporary studies, the current work carried out its own microstructural and energy dispersive studies. It shows that apricot kernel shell is a promising raw material for obtaining sorption materials that can be used to extract various pollutants from aqueous media. The parameters of sorption interaction are presented, at which the highest rate of removal of pollutants was achieved. It is shown that the sorption capacity of apricot biomass components can be increased by modifying it with various chemical reagents, as well as other physical and physicochemical methods. We reveal that most publications consider the use of the latter as a raw material for the production of activated carbons. It is established that the surface area and total pore space of activated carbons from apricot kernel shells depend on the modes of carbonization and activation. It is shown that activated carbons are effective adsorbents for removing various pollutants (metal ions, dyes, oil and oil products) from aqueous media. It was found that the adsorption isotherms of pollutants in most cases are best described by the Langmuir and Freundlich models, and the process kinetics is most often described by the pseudo-second-order model. The possibility of improving the sorption characteristics of apricot biomass during chemical or physicochemical treatment is also shown.

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Section: Resultsmentioning

confidence: 99%

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

et al. 2022

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“…ADF biochar has negative zeta potential . Microorganisms can be introduced and reproduced on biochar surfaces contributing to the adsorption and biodegradation of organic and inorganic materials …”

Section: Methods For Modifying Biochar Propertiesmentioning

confidence: 99%

“…289 Microorganisms can be introduced and reproduced on biochar surfaces contributing to the adsorption and biodegradation of organic and inorganic materials. 290 Table 4 lists biochar modification strategies. Figure 13 summarizes the main effects of processing conditions on biochar properties that are relevant for environmental applications and other uses.…”

Section: Sream Activationmentioning

confidence: 99%

Perspectives of Engineered Biochar for Environmental Applications: A Review

2022

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Research on using biochar for environmental applications has witnessed unprecedented advances in the past decade. Biochar is universally considered one of the best alternatives to store carbon to fight global warming. Thus, the sequential use of biochar in environmental remediation compatible with carbon sequestration is receiving growing attention. One of the reasons for such huge interest is the possibility to engineer biochar with targeted properties (e.g., surface area and chemistry) relevant to existing environmental issues. These properties can be achieved by selecting appropriate raw materials, processing conditions, carbonization technology, and the possibility of selecting postproduction modification approaches. The objective of this review is to summarize strategies to enhance biochar properties relevant to its use in environmental services (e.g., water purification, air/gas cleaning, construction materials, soil amendments) and the corresponding results on the use of this material for these applications. The main methods for enhancing biochar properties for environmental applications reviewed include activation (physical and chemical), oxidation, metal and metal oxide modification, metal-free heteroatom doping, and biological modification. Both modified and unmodified biochars have been used for soil amendments as adsorbents of pollutants in the aqueous phase (e.g., removal of P and N, heavy metals, and organic pollutants), adsorbents of pollutants in the gas phase (e.g., biogas cleaning), as a catalyst, as an additive for improving anaerobic digestion, and as an admixture to cementitious/construction materials, with promising results in all cases. New opportunities for using biochar are being reported as the science of biochar production, modification, and use advances.

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“…Adding small biochar fractions to concrete mixes is currently being tested, first for the production of carbon-neutral charcrete elements like garden tiles, tree pits or benches (Vinnova 2021). Biochar for filtering applications is also being investigated (Shaheen et al 2019;Jayakumar et al 2021), but commercial applications are not yet common in Sweden. While biochar filters for removal of contaminants such as per-and polyfluoroalkyl substances are currently excluded from commercial applications in Sweden (McCleaf 2020), the use of biochar as a support for biofilm growth and carbon oxidation in water has shown promising results (Perez-Mercado et al 2018).…”

Section: Biochar In Urban Areasmentioning

confidence: 99%

Life cycle assessment of urban uses of biochar and case study in Uppsala, Sweden

Azzi

Karltun

Sundberg

2022

Biochar

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Biochar is a material derived from biomass pyrolysis that is used in urban applications. The environmental impacts of new biochar products have however not been assessed. Here, the life cycle assessments of 5 biochar products (tree planting, green roofs, landscaping soil, charcrete, and biofilm carrier) were performed for 7 biochar supply-chains in 2 energy contexts. The biochar products were benchmarked against reference products and oxidative use of biochar for steel production. Biochar demand was then estimated, using dynamic material flow analysis, for a new city district in Uppsala, Sweden. In a decarbonised energy system and with high biochar stability, all biochar products showed better climate performance than the reference products, and most applications outperformed biomass use for decarbonising steel production. The climate benefits of using biochar ranged from − 1.4 to − 0.11 tonne CO2-eq tonne−1 biochar in a decarbonised energy system. In other environmental impact categories, biochar products had either higher or lower impacts than the reference products, depending on biochar supply chain and material substituted, with trade-offs between sectors and impact categories. However, several use-phase effects of biochar were not included in the assessment due to knowledge limitations. In Uppsala’s new district, estimated biochar demand was around 1700 m3 year−1 during the 25 years of construction. By 2100, 23% of this biochar accumulated in landfill, raising questions about end-of-life management of biochar-containing products. Overall, in a post-fossil economy, biochar can be a carbon dioxide removal technology with benefits, but biochar applications must be designed to maximise co-benefits.

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New directions and challenges in engineering biologically-enhanced biochar for biological water treatment

Cited by 38 publications

References 107 publications

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

Perspectives of Engineered Biochar for Environmental Applications: A Review

Life cycle assessment of urban uses of biochar and case study in Uppsala, Sweden

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