Biochar properties and lead(II) adsorption capacity depend on feedstock type, pyrolysis temperature, and steam activation

Kwak, Jin‐Hyeob; Islam, Md. Shahinoor; Wang, Siyuan; Messele, Selamawit Ashagre; Naeth, M. Anne; El-Din, Mohamed Gamal; Chang, Scott X.

doi:10.1016/j.chemosphere.2019.05.128

Cited by 226 publications

(78 citation statements)

References 55 publications

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“…The solid residues obtained after yeast fermentation exhibited higher Cd adsorption capacities than the raw stalks ( Table 2). In the last years, RS straw was used as feedstock for biochar production at laboratory scale [64,[83][84][85]. Although the adsorption capacities of these materials are usually higher than the precursors (Table 2), the feedstock particles size and preparation conditions vary.…”

Section: Mono-component Systems: Inorganics Adsorptionmentioning

confidence: 99%

Valorization of Rapeseed Waste Biomass in Sorption Processes for Wastewater Treatment

Morosanu¹,

Teodosiu²,

Tofan³

et al. 2021

Environmental Issues and Sustainable Development

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Circular economy provides an efficient framework for effective biomass valorization, through strategic use and processing of resources and waste reuse. Being the second largest energetic crop, rapeseed (RS) presents a high potential in this sense. However, good management of the large quantity of generated wastes from agro-industrial activities is required. The most common management strategies in this sense refer to the reuse of RS wastes (mainly stems and press-cake) for animal feed, compost, soil amendment and fertilizer. Valorization of RS wastes as adsorbent for wastewater treatment is attractive. Despite the fact that only few articles on this subject exist in literature, they are sufficient to reflect the potential of this adsorbent to remove both inorganic and organic compounds from aqueous phase. The rapeseed wastes were used in native form (for diluted effluents) or modified by chemical or thermal treatment (for concentrated effluents or large molecule contaminants). This chapter will provide a review on the RS wastes management strategies, highlighting the applications for removing contaminants from wastewater in single and multi-component systems, in static or continuous operation mode.

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Section: Mono-component Systems: Inorganics Adsorptionmentioning

confidence: 99%

Valorization of Rapeseed Waste Biomass in Sorption Processes for Wastewater Treatment

Morosanu¹,

Teodosiu²,

Tofan³

et al. 2021

Environmental Issues and Sustainable Development

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“…The lowtemperature biochar had a pH of 7.68, an ash content of 8.1%, a surface area of 2.8 m 2 g −1 , and C and N contents of 632.5 and 15.8 g kg −1 (on a dry-weight basis), respectively. The high-temperature biochar had a pH of 10.93, an ash content of 15.9%, a surface area of 4.2 m 2 g −1 , and C and N content of 787.7 and 13.7 g kg −1 , respectively, based on data from Kwak et al [19].…”

Section: Soil and Biocharmentioning

confidence: 99%

“…The production condition such as pyrolysis temperature is a major factor that influences biochar properties [10,16,17]. For instance, biochars produced at high temperatures (e.g., 550 • C) usually have a greater surface area, pH, and porosity and a lower volatile matter concentration than biochars produced at low temperatures (e.g., 300 • C) when derived from the same feedstock [18,19]. These characteristics make biochars produced at high temperatures more effective in reducing GHG emissions than those produced at low temperatures [20].…”

Section: Introductionmentioning

confidence: 99%

Greenhouse Gas Emissions from Forest Soils Reduced by Straw Biochar and Nitrapyrin Applications

Kwak

Chang

et al. 2021

Land

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Forestlands are widely distributed in the dominantly agricultural landscape in western Canada, and they play important ecological functions; such forestlands (e.g., shelterbelts) accumulate soil organic matter and may receive a substantial amount of nitrogen in the form of surface and subsurface runoff from adjacent croplands and become a significant source of emissions of greenhouse gases (GHGs) such as CO2, N2O, and CH4. Biochar and nitrapyrin applications could potentially mitigate GHG emissions, but their co-application in forest soils has not been studied. We investigated the effect of the application of biochars produced at low (300 °C; BC300) and high temperatures (700 °C; BC700) using canola (Brassica napus L.) straw and the effect of their co-application with nitrapyrin on GHG emissions and soil properties in a 35-day laboratory incubation experiment using forest soils collected from five shelterbelt sites. Results showed no significant interaction effect of biochar and nitrapyrin on the global warming potential (GWP) of the GHG emissions, and the GWP was 15.8% lower in the soil with nitrapyrin than without nitrapyrin application treatments. The GWP was significantly enhanced by BC300 addition due to a 26.9% and 627.1% increase in cumulative CO2 and N2O emissions, respectively, over the 35-day incubation. The GWP significantly decreased by BC700 addition due to a 27.1% decrease in cumulative CO2 emissions. However, biochar addition did not affect CH4 emissions, while nitrapyrin decreased CH4 uptake by 50.5%. With BC300 addition, soil-dissolved organic carbon and microbial biomass carbon increased by 26.5% and 33.9%, respectively, as compared to no biochar addition (CK). Soil pH increased by 0.16 and 0.37 units after the addition of BC300 and BC700, respectively. Overall, the effect of biochar and nitrapyrin was independent in mitigating GHG emissions and was related to the type of biochar applied and changes in soil properties.

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“…The adsorbent retained >88% of adsorption capacity after five adsorption-desorption cycles. Kwak et al (2019) studied Pb(II) removal from water using straw biochar. The results showed that increase in pyrolysis temperature enhanced the Pb(II) adsorption capacity due to increase in biochar pH, ash content, and surface area.…”

Section: Physical Treatmentmentioning

confidence: 99%

Hazardous wastes treatment technologies

Shih

et al. 2020

Water Environment Research

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Biochar properties and lead(II) adsorption capacity depend on feedstock type, pyrolysis temperature, and steam activation

Cited by 226 publications

References 55 publications

Valorization of Rapeseed Waste Biomass in Sorption Processes for Wastewater Treatment

Valorization of Rapeseed Waste Biomass in Sorption Processes for Wastewater Treatment

Greenhouse Gas Emissions from Forest Soils Reduced by Straw Biochar and Nitrapyrin Applications

Hazardous wastes treatment technologies

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