Cadmium and lead remediation using magnetic oak wood and oak bark fast pyrolysis bio-chars

Mohan, Dinesh; Kumar, Arun H.S.; Sarswat, Ankur; Alexandre-Franco, María; Pittman, Charles U.

doi:10.1016/j.cej.2013.09.057

Cited by 506 publications

(170 citation statements)

References 59 publications

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“…Thus, WB can be employed for dispersing and stabilizing Fe 3 O 4 in order to enhance its potential for use in environmental applications. Similar results have been reported by Mohan et al [17] during the pyrolysis of magnetic woody biomass for the production of bio-oil.…”

Section: Introductionsupporting

confidence: 90%

“…For example, Pukalchik et al (2017) using a combination of wood-derived biochar and humic substances can significantly improve soil quality and fertility and restore degraded soil functions, owing to the interactions between the components, resulting in the stabilization of contaminated soil [16]. The potential of magnetic wood-derived biochar for use in the treatment of metal-polluted solutions has also been investigated [17]. The results showed that biochar can significantly adsorb the heavy metal ions present in contaminated water samples, suggesting that the removal of the heavy metals is primary associated with the sorption properties of biochar.…”

Section: Introductionmentioning

confidence: 99%

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Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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Abstract:In this study, we investigated the ability of a magnetic wood biochar (WB)-based composite catalyst (Fe 3 O 4 -WB) to catalyze sodium persulfate (PS) for the remediation of estuary sediment contaminated with polycyclic aromatic hydrocarbons (PAHs). The effects of various critical parameters, including the catalyst dose and initial pH, were investigated. The degradation of the PAHs was found to be related to the number of rings in their structure. The results showed that Fe 3 O 4 -WB is an efficient catalyst for the removal of high-ring PAHs (HPAHs), with the highest degradation rates for the 6-, 5-, and 4-ringed PAHs being 90%, 84%, and 87%, respectively, for a PS concentration of 2 × 10 −5 M, catalyst concentration of 3.33 g/L, and pH of 3.0. That the reduction rate of the HPAHs was greater than that of the low-ring PAHs can be attributed to the strong affinity of the HPAHs for biochar derived from wood biomass. Overall, this study revealed that the WB-mediated electron transfer catalysis of the surface functional groups in a wide range of pH in the Fe 3 O 4 -WB/PS system and potentially application in the remediation of sediments contaminated with PAHs.

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Section: Introductionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

et al. 2018

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“…The increase of soil pH can enhance the adsorption capacity of biochar due to deprotonation processes [23], however it requires a greater addition of biochar which will increase the cost in purchasing and transportation. A balance between performance and cost must therefore be seek during engineering application when considering the impact of biochar on soil pH.…”

Section: Soil Phmentioning

confidence: 99%

Salisbury biochar did not affect the mobility or speciation of lead in kaolin in a short-term laboratory study

Shen

McMillan

Jin

et al. 2016

Journal of Hazardous Materials

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Salisbury biochar (produced from British broadleaf hardwood) with two different particle sizes (≤ 2 mm and ≤ 0.15 mm) was applied on a kaolin with three different lead (Pb 2+ ) contamination levels (50 mg/kg, 300 mg/kg and 1000 mg/kg) at the dosage of 1% in w/w. The short-term impact of biochar on the mobility and speciation of Pb 2+ in the kaolin was investigated using attenuation periods of 1, 7and 28 days. This paper suggests the inefficiency of biochar treament on heavy-metal contaminated clay-rich soils. Therefore a laboratory treatablity study with respect to the soil type may be crucial when large-scale biochar applications in heavy-metal associated soil remediation are evaluated.

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“…Biochar from organic wastes has shown potential for removal of heavy metals from wastewater (Namgay et al, 2010;Major, 2011;Kim et al, 2013;Mohan et al, 2014;Coumar et al, 2016). Heavy metals, a group of elements with at least five times the density of water, are challenging environmental pollutants in places with elevated anthropogenic pressure (di Toppi and Gabbrielli, 1999).…”

Section: Introductionmentioning

confidence: 99%

Biochar Types from Latrine Waste and Sewage Sludge Differ in Physico-Chemical Properties and Cadmium Adsorption

Koetlisi¹,

Muchaonyerwa²

2017

American Journal of Applied Sciences

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Pyrolysis of latrine fecal waste could produce valuable products for minimizing environmental contamination with heavy metals. The objective of this study was to determine yields, characteristics and cadmium (Cd) sorption of biochar from latrine fecal waste and sewage sludge, as affected by pyrolysis temperature. Slow pyrolysis at 350, 550 and 650°C, was used to produce the biochar. In addition to proximate and ultimate analysis, surface area, porosity and functional groups were analyzed. A batch sorption study was conducted to determine the cadmium sorption capacity of the biochar. Biochar from latrine waste had higher yield, ash content, surface area and pore volume and lower total and fixed carbon (C) and volatile matter than from sewage sludge. Yield, volatile matter, total C, nitrogen (N) and hydrogen (H) decreased with pyrolysis temperature, while ash content, surface area and porosity increased. Surface functional groups of the biochar also varied with feedstock and pyrolysis temperature. The Cd sorption capacities were higher for biochar from latrine waste than from sewage sludge. The findings indicated that characteristics of biochar from latrine waste differ from that of sewage sludge origin and has greater potential as an adsorbent for removal of Cd from wastewater.

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Cadmium and lead remediation using magnetic oak wood and oak bark fast pyrolysis bio-chars

Cited by 506 publications

References 59 publications

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Wood-Biochar-Supported Magnetite Nanoparticles for Remediation of PAH-Contaminated Estuary Sediment

Salisbury biochar did not affect the mobility or speciation of lead in kaolin in a short-term laboratory study

Biochar Types from Latrine Waste and Sewage Sludge Differ in Physico-Chemical Properties and Cadmium Adsorption

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