Can biochar and designer biochar be used to remediate per- and polyfluorinated alkyl substances (PFAS) and lead and antimony contaminated soils?

Silvani, Ludovica; Cornelissen, Gerard; Smebye, Andreas Botnen; Zhang, Yaxin; Okkenhaug, Gudny; Zimmerman, Andrew R.; Thune, Gorm; Sævarsson, Hilmar

doi:10.1016/j.scitotenv.2019.133693

Cited by 60 publications

(17 citation statements)

References 50 publications

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“…For instance, Sb concentration in the roots of S. bicolor declined significantly from 49.78 mg kg −1 in “500 mg kg −1 TiO 2 NPs+ 2.5% BC” treatment to 35.98 mg kg −1 in “500 mg kg −1 TiO 2 NPs+ 5% BC” treatment (27.72% reduction; P < 0.05). Sorption of metals onto biochar particles is believed to occur mainly on surface functional groups, particularly oxygen containing functional groups ( Silvani et al., 2019 ). However, higher metal absorption by plants due to addition of BC to soil was also reported in the literature ( Simiele et al., 2020 ) that could be attributed to an increase of root surface, thus a higher exchange surface between soil and plant, and hence promoted metal uptake.…”

Section: Resultsmentioning

confidence: 99%

Co-application of biochar and titanium dioxide nanoparticles to promote remediation of antimony from soil by Sorghum bicolor: metal uptake and plant response

Zand

Tabrizi

Heir

2020

Heliyon

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Association of titanium dioxide nanoparticles (TiO 2 NPs) and biochar (BC) to assist phytoremediation of Sb contaminated soil was investigated in this study. Seedlings of Sorghum bicolor were exposed to different regimes of TiO 2 NPs (0, 100, 250 and 500 mg kg −1 ) and BC (0, 2.5% and 5%), separately and in combination, to investigate the effects on plant growth, Sb absorption and accumulation and physiological response of the plant in Sb contaminated soil. Co-application of TiO 2 NPs and BC had positive effects on plant establishment and growth in contaminated soil. Greater accumulation of Sb in the shoots compared to the roots of S. bicolor was observed in all treatments. Application of BC increased immobilization of Sb in the soil. Using TiO 2 NPs significantly increased accumulation capacity of S. bicolor for Sb with the greatest accumulation capacity of 1624.1 μg per pot achieved in “250 mg kg −1 TiO 2 NPs+2.5% BC” treatment (P < 0.05). Association of TiO 2 NPs and BC significantly increased chlorophyll a (Chl a ) and chlorophyll b (Chl b ) contents of S. bicolor compared to the TiO 2 NPs-amended treatments. Results of this study presented a promising novel technique by combined application of TiO 2 NPs and BC in phytoremediation of Sb contaminated soils. Co-application of TiO 2 NPs and BC could reduce the required amounts of TiO 2 NPs for successful phytoremediation of heavy metal polluted soils. Intelligent uses of plants in accompany with biochar and nanomaterials have great application prospects in dealing with soil remediation.

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Section: Resultsmentioning

confidence: 99%

Co-application of biochar and titanium dioxide nanoparticles to promote remediation of antimony from soil by Sorghum bicolor: metal uptake and plant response

Zand

Tabrizi

Heir

2020

Heliyon

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“…The process reaches approximatively 600 • C and powdered iron oxide-hydroxide (FeOOH) was added between fresh biomass layers. For additional details, see Silvani and Cornelissen work (2019) [34]. Since EuFeBC had a different particle size distribution, only a fraction less than 500 µm was selected and manually homogenized in a mortar.…”

Section: Biochars Descriptionmentioning

confidence: 99%

“…In this work three different BCs are investigated: a pine wood BC (PWBC) obtained in a gasification unit in Germany [32]; a rice husk BC (RHBC), made in Indonesia using local technique [33] and a modified BC, the Eupatorium adenophorum Iron-enriched biochar (EuFeBC) from Nepal [34]. With respect to these BCs, certain studies have already been published for specific environmental purposes.…”

Section: Introductionmentioning

confidence: 99%

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Biochar from Pine Wood, Rice Husks and Iron-Eupatorium Shrubs for Remediation Applications: Surface Characterization and Experimental Tests for Trichloroethylene Removal

et al. 2021

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Nowadays porous materials from organic waste, i.e., Biochar (BC), are receiving increased attention for environmental applications. This study adds information on three BCs that have undergone a number of studies in recent years. A Biochar from pine wood, one from rice husk and one from Eupatorium shrubs enriched with Iron, labelled as PWBC, RHBC and EuFeBC respectively, are evaluated for Trichloroethylene (TCE) removal from aqueous solution. Physical-chemical description is performed by SEM-EDS and BET analysis. The decrease of TCE over time follows a pseudo-second order kinetics with increased removal by the PWBC. Freundlich and Langmuir models well fit equilibrium test data. The optimized values of the maximum adsorbed amount, qmax (mg g−1), follows this order 109.41 PWBC > 30.35 EuFeBC > 21.00 RHBC. Fixed-bed columns are also carried out. Best performance is again achieved by PWBC, which operates for a higher number of pore volume, followed by EuFeBC and RHBC. Continuous testing confirms batch studies and makes it possible to evaluate the workability of materials in configurations closer to reality. Results are promising for potential environmental application. In particular, the characterization of several classes of contaminants opens the doors to possible uses in mixed contamination cases.

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“…A number of studies have examined the suitability of biochars for metal immobilization in shooting range soils, as summarized in Table 3B. In most of these studies, short-term batch experiments were conducted using biochars derived from manures [46,90], crop residues [24,85,[93][94][95][96][97] and oak wood [20,22,87]. In most cases, biochar proved to be a versatile functional material, not only because it promoted soil Pb immobilization, but also because its application led to the incorporation (and retention) of labile organic carbon and nutrients, which in turn improved soil fertility and enhanced plant growth and soil microbial activity [166,167].…”

Section: Agro-food By-products and Wastes As Soil Amendments Of Biolomentioning

confidence: 99%

Recent Trends in Sustainable Remediation of Pb-Contaminated Shooting Range Soils: Rethinking Waste Management within a Circular Economy

Gómez-Sagasti

Anza²,

Hidalgo³

et al. 2021

Processes

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Soil metal contamination in recreational shooting ranges represents a widespread environmental problem. Lead (Pb) is the primary component of traditional ammunition, followed by metalloids such as antimony (Sb) and arsenic (As). Lead-based bullets and pellets deposited on the soil surface are subject to steady weathering; hence, metal(loid)s are released and accumulated in the underlying soil, with potential adverse consequences for ecosystem function and human health. Amongst the currently available environmentally-safe technologies for the remediation of metal-contaminated soils, chemical immobilization is recognized as the most practical and cost-effective one. This technology often uses inorganic and organic amendments to reduce metal mobility, bioavailability and toxicity (environmental benefits). Likewise, amendments may also promote and speed up the re-establishment of vegetation on metal-affected soils, thus facilitating the conversion of abandoned shooting ranges into public green spaces (social benefit). In line with this, the circular economy paradigm calls for a more sustainable waste management, for instance, by recycling and reusing by-products and wastes in an attempt to reduce the demand for raw materials (economic benefit). The objective of this manuscript is to present a state-of-the-art review of the different industrial and agro-food by-products and wastes used for the remediation of metal-contaminated shooting range soils.

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Can biochar and designer biochar be used to remediate per- and polyfluorinated alkyl substances (PFAS) and lead and antimony contaminated soils?

Cited by 60 publications

References 50 publications

Co-application of biochar and titanium dioxide nanoparticles to promote remediation of antimony from soil by Sorghum bicolor: metal uptake and plant response

Co-application of biochar and titanium dioxide nanoparticles to promote remediation of antimony from soil by Sorghum bicolor: metal uptake and plant response

Biochar from Pine Wood, Rice Husks and Iron-Eupatorium Shrubs for Remediation Applications: Surface Characterization and Experimental Tests for Trichloroethylene Removal

Recent Trends in Sustainable Remediation of Pb-Contaminated Shooting Range Soils: Rethinking Waste Management within a Circular Economy

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