Biochar heavy metal removal in aqueous solution depends on feedstock type and pyrolysis purging gas

Islam, Md. Shahinoor; Kwak, Jin Hyeob; Nzediegwu, Christopher; Wang, Siyuan; Palansuriya, Kumuduni; Kwon, Eilhann E.; Naeth, M. Anne; El-Din, Mohamed Gamal; Ok, Yong Sik; Chang, Scott X.

doi:10.1016/j.envpol.2021.117094

Cited by 97 publications

(33 citation statements)

References 74 publications

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“…The R 2 values of the pseudo-second-order kinetic model were higher than those of pseudo-first-order model ( Table S3 ), which suggested that a pseudo-second-order model could better describe the adsorption processes of Pb 2+ and Zn 2+ , indicating a chemisorption dominated the adsorption. 23 …”

Section: Resultsmentioning

confidence: 99%

Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

et al. 2021

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Particle size, one of the predominant factors that affect the adsorption capacity of biochar, has been widely investigated. However, correlative studies on a coexistence system containing various ions together with differentiated particle sizes are scarce. In this study, samples of municipal solid waste (sludge) biochar (SB) with different particle sizes were separated and examined for the adsorption performance in bi-cation (Pb 2+ /Zn 2+ ) and multi-ion (Pb 2+ , Zn 2+ and Cl – ) systems. The results showed that the adsorption capacity is influenced by both particle size and ion configurations. The effective stabilization ability of a small size group can be attributed to the most non-bioavailable fraction. Meanwhile, the acidic soluble and non-bioavailable fraction of Pb 2+ /Zn 2+ reached more than 90%. The mixed adsorption experiment showed that Pb 2+ would compete for the adsorption sites of biochar with Zn 2+ , and Cl – intervention could improve the adsorption of Pb 2+ (2.33–6.93%) and Zn 2+ (16.52–18.01%) on biochar. Further, X-ray diffraction spectra and phosphorus concentration dynamics and kinetics simulations revealed that more abundant active sites in the formatted pyromorphite were able to be exposed in the presence of Cl – . The small-size portion of SB therefore exhibited excellent potential for the long-term heavy metal remediation under practical conditions of multi-ion systems in an actual environment.

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Section: Resultsmentioning

confidence: 99%

Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

et al. 2021

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“…The functional properties of biochar were influenced by its raw material and synthesis conditions. Generally, on average biochar was reported to improve the soil aggregation by 16.4% irrespective of soil, field, and experimental conditions and parameters [101]. Magnetic biochar composite (MBC) synthesized from pine bark waste and CoFe 2 O 4 using facile fabrication method exhibited excellent sorption performance as per Langmuir equation at pH 4-5 for removal of Cd(II) and Pb(II) ions at industrial scale [96].…”

Section: Scope Of Bioengineered Char As a Sustainable Mode For Removal Of Heavy Metalsmentioning

confidence: 99%

Section: Scope Of Bioengineered Char As a Sustainable Mode For Removal Of Heavy Metalsmentioning

confidence: 99%

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Sustainable mitigation of heavy metals from effluents: Toxicity and fate with recent technological advancements

et al. 2021

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Increase in anthropogenic activities due to rapid industrialization had caused an elevation in heavy metal contamination of aquatic and terrestrial ecosystems. These pollutants have detrimental effects on human and environmental health. The majority of these pollutants are carcinogenic, neurotoxic, and are very poisonous even at very low concentrations. Contamination caused by heavy metals has become a global concern for which the traditional treatment approaches lack in providing a cost-effective and eco-friendly solution. Therefore, the use of microorganisms and plants to reduce the free available heavy metal present in the environment has become the most acceptable method by researchers. Also, in microbial-and phyto-remediation the redox reaction shifts the valence which makes these metals less toxic. In addition to this, the use of biochar as a remediation tool has provided a sustainable solution that needs further investigations toward its implementation on a larger scale. Enzymes secreted by microbes and whole microbial cell are considered an eco-efficient biocatalyst for mitigation of heavy metals from contaminated sites. To the best of our knowledge there is very less literature available covering remediation of heavy metals aspect along with the sensors used for detection of heavy metals. Systematic management should be implemented to overcome the technical and practical limitations in the use of these bioremediation techniques. The knowledge gaps have been identified in terms of its limitation and possible future directions have been discussed.

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“…It is considered that the surface area and surface functional groups make contributions to heavy-metal adsorption. However, despite the surface area is regarded as the main physical property that influences the adsorption of biochar [ 248 ], the corresponding adsorption capacity cannot be guaranteed to reach the maximum. For example, canola straw, manure pellet, sawdust and wheat straw were prepared into biochars under same conditions and activated by steam [ 117 ].…”

Section: Role Of Bioengineered Biochar In Waste Recyclingmentioning

confidence: 99%

Bioengineered biochar as smart candidate for resource recovery toward circular bio-economy: a review

et al. 2021

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Biochar’s ability to mediate and facilitate microbial contamination degradation, as well as its carbon-sequestration potential, has sparked interest in recent years. The scope, possible advantages (economic and environmental), and future views are all evaluated in this review. We go over the many designed processes that are taking place and show why it is critical to look into biochar production for resource recovery and the role of bioengineered biochar in waste recycling. We concentrate on current breakthroughs in the fields of engineered biochar application techniques to systematically and sustainable technology. As a result, this paper describes the use of biomass for biochar production using various methods, as well as its use as an effective inclusion material to increase performance. The impact of biochar amendments on microbial colonisation, direct interspecies electron transfer, organic load minimization, and buffering maintenance is explored in detail. The majority of organic and inorganic (heavy metals) contaminants in the environment today are caused by human activities, such as mining and the use of chemical fertilizers and pesticides, which can be treated sustainably by using engineered biochar to promote the establishment of a sustainable engineered process by inducing the circular bioeconomy.

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Biochar heavy metal removal in aqueous solution depends on feedstock type and pyrolysis purging gas

Cited by 97 publications

References 74 publications

Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

Sustainable mitigation of heavy metals from effluents: Toxicity and fate with recent technological advancements

Bioengineered biochar as smart candidate for resource recovery toward circular bio-economy: a review

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Biochar heavy metal removal in aqueous solution depends on feedstock type and pyrolysis purging gas

Cited by 97 publications

References 74 publications

Synergetic Enhancement of Pb2+ and Zn2+ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

Synergetic Enhancement of Pb2+ and Zn2+ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

Sustainable mitigation of heavy metals from effluents: Toxicity and fate with recent technological advancements

Bioengineered biochar as smart candidate for resource recovery toward circular bio-economy: a review

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Product

Resources

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Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems

Synergetic Enhancement of Pb²⁺ and Zn²⁺ Adsorption onto Size-Selective Sludge Biochar Portions in Multiple Ion Solution Systems