Plant refuses driven biochar: Application as metal adsorbent from acidic solutions

Khare, Puja; Dilshad, Uzma; Rout, Prasanta Kumar; Yadav, Vinit Singh; Jain, Shilpi

doi:10.1016/j.arabjc.2013.11.047

Cited by 46 publications

(16 citation statements)

References 29 publications

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“…Coupled with a decrease in the amount of dissolved acidity in the column leachate, this resulted in a net alkalinity (alkalinity>acidity) being present. Our results are generally consistent with previous research on other biochar materials in contact with acidic solutions at lower drainage:biochar ratios (Khare et al 2013;Kim et al 2014).…”

Section: Acid Neutralisation Capacitysupporting

confidence: 95%

“…The column was uniformly filled with a measured amount of biochar (approximately 1.25 kg), filled with unfiltered acid drainage (approx. 3 L) from the Jervois site and allowed to equilibrate for a period of approximately 24 h. This time period was considered sufficient for equilibration of the biochar with the proton and dissolved metal concentrations (Lu et al 2012;Khare et al 2013), and approximated how the biochar might be used in drainage channels with intermittent flow. Air was continually bubbled up through the columns using an aquarium bubbler, in order to maintain oxygenated (typically 4-5 mg/L dissolved oxygen, see supplementary material S1) conditions.…”

Section: Methodsmentioning

confidence: 99%

“…Lu et al (2012) found sorption of Pb to a sludge-derived biochar increased as pH was raised from pH 2 to 5. Khare et al (2013) also showed pH increased and metals were removed in synthetic multimetal solutions and simulated acid mine drainage. It is difficult to apply these results directly to acid drainage, however, where multiple cations and anions are present and may interact.…”

Section: Introductionmentioning

confidence: 95%

See 2 more Smart Citations

The capacity of biochar made from common reeds to neutralise pH and remove dissolved metals in acid drainage

Mosley

Willson²,

Hamilton³

et al. 2015

Environ Sci Pollut Res

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We tested the capacity of biochar (made at 450 °C from a common reed species) to neutralise pH and remove metals in two acid drainage waters (pH 2.6 and 4.6) using column leaching and batch mixing experiments. In the column experiments, the acid drainage water was neutralised upon passage through the biochar with substantial increases (4-5 pH units) in the leachate pH. In the batch experiments, the leachate pH remained above 6.5 when the drainage:biochar ratio was less than approximately 700:1 (L acid drainage:kg biochar) and 20:1 for the pH 4.6 and pH 2.6 drainage waters, respectively. Dissolved metal concentrations were reduced by 89-98 % (Fe ≈ Al > Ni ≈ Zn > Mn) in the leachate from the biochar. A key mechanism of pH neutralisation appears to be solid carbonate dissolution as calcite (CaCO3) was identified (via X-ray diffraction) in the biochar prior to contact with acid drainage, and dissolved alkalinity and Ca was observed in the leachate. Proton and metal removal by cation exchange, direct binding to oxygen-containing functional groups, and metal oxide precipitation also appears important. Further evaluation of the treatment capacity of other biochars and field trials are warranted.

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Section: Acid Neutralisation Capacitysupporting

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

See 1 more Smart Citation

The capacity of biochar made from common reeds to neutralise pH and remove dissolved metals in acid drainage

Mosley

Willson²,

Hamilton³

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Many surface functional groups when exhibited on biochar"s surface will likely influence its interactions with trace metals include electrostatic attraction, surface complexation and ion-exchange. These effects are demonstrated by the changes in functional groups of biochar before and after the metal ion adsorption [69].…”

Section: Mechanism Of Interaction Between Biochar and Trace Metalsmentioning

confidence: 99%

“…Kołodyn´ska et al [135] also used Cu (II) and Pb (II) ions for studies of kinetic and adsorptive characterisation of biochar in trace metals removal that fitted well to the pseudo-second-order model. Khare et al [69] removed different trace metals (thus Cd, Cr, Cu and Pb) from acidic solutions using plant waste derived biochar. The study revealed that the adsorption of trace metals can be described more fittingly by the pseudo-second-order kinetics model than the firstorder kinetic model.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

Duwiejuah¹,

Cobbina²,

Bakobie³

2017

IJEBB

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Eco-friendly biochar produced from cost-effective and readily available agricultural waste will likely pose no threat on the aqueous phases, other environmental media, human health and emission of greenhouse gases to the atmosphere. Optimising biochar for an intended application could require careful selection of a biomass feedstock as well as production pyrolysis technique and conditions for the production of biochars with specific characteristics. Previous studies have explores the relationships that exist between biochar production conditions, characteristics, and possible end-uses of biochar. This review provides an overview of the production and utilisation of biochar as absorbents for adsorption of trace metals in contaminated aqueous environment. Biochar has great affinity to adsorb molecular ions that is making it possible to be used for various toxicological remediation strategies. It has proven effective and useful for mitigating aqueous metals, organic compounds, suspended solids, and organic hydrocarbons in a various kind of industrial applications such as urban and residential storm water runoff, landfill leachates, industrial runoff, resource extraction runoff, and industrial wastewater filtration. Specifically designed biochar could be very effective in the removal of trace metals from contaminated aqueous environment. The multiple factors that determine the adsorption of the trace metals in aqueous environment or phases needs to be carefully examined. Cost-effectiveness of biomass feedstock and eco-friendliness of techniques need to also be given much consideration by way of making comparison with existing contaminant mitigation technologies. Keywords: aqueous phases, biochar, cost-effective, biomass feedstock, removal, trace metalsCite This Article: A. B. Duwiejuah, S.

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Biochar Assisted Remediation of Toxic Metals and Metalloids

Dhiman

Ibrahim

Devi

et al. 2021

Handbook of Assisted and Amendment: Enhanced Sustainable Remediation Technology

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Plant refuses driven biochar: Application as metal adsorbent from acidic solutions

Cited by 46 publications

References 29 publications

The capacity of biochar made from common reeds to neutralise pH and remove dissolved metals in acid drainage

The capacity of biochar made from common reeds to neutralise pH and remove dissolved metals in acid drainage

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

Biochar Assisted Remediation of Toxic Metals and Metalloids

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