Copper(II) removal from aqua solution using rice straw derived biochar

Sakhiya, Anil Kumar; Aier, Imlisongla; Pathak, Shivangi; Anand, Abhijeet; Jha, Shivangi; Vijay, Virendra Kumar; Kaushal, Priyanka

doi:10.1016/j.matpr.2020.12.953

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…The production of char is lower at 550 °C (30.3 wt%) due to the cracking reaction of the volatile matter. According to Sakhiya et al [41], thermal cracking is the key factor for the production of light hydrocarbons, resulting in substantial proportions of bio-oil and gas yields. The bio-oil yield increased as the reactor temperature increased from 350 to 500 °C, with decreased char and gas products.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

[Retracted] Utilization of Eco‐Friendly Waste Eggshell Catalysts for Enhancing Liquid Product Yields through Pyrolysis of Forestry Residues

Kaliappan¹,

Karthick²,

Patil

et al. 2022

Journal of Nanomaterials

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In this study, catalytic and noncatalytic pyrolysis of Prosopis juliflora biomass was carried out in a fluidized bed reactor. This study highlights the potential use of forestry residues with waste eggshells under a nitrogen environment. The experiments were conducted to increase the yield of bio-oil by changing the parameters such as pyrolysis temperature, particle size, and catalyst ratio. Under noncatalytic pyrolysis, a maximum bio-oil yield of 40.9 wt% was obtained when the feedstock was pyrolysed at 500°C. During catalytic pyrolysis, the yield of bio-oil was increased by up to 16.95% compared to the noncatalytic process due to the influence of Ca-rich wastes on devolatilization behavior. In particular, the existence of alkali and alkaline-earth metals present in eggshells might have positive effects on the decomposition of biomass material. The bio-oil obtained through catalytic pyrolysis under maximum yield conditions was analyzed for its physical and chemical characterization by Fourier transform infrared (FT-IR) spectroscopy and gas chromatography mass spectroscopy (GC-MS).

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Section: Pyrolysis Experimentsmentioning

confidence: 99%

[Retracted] Utilization of Eco‐Friendly Waste Eggshell Catalysts for Enhancing Liquid Product Yields through Pyrolysis of Forestry Residues

Kaliappan¹,

Karthick²,

Patil

et al. 2022

Journal of Nanomaterials

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“…The yield of corn stover biochar exhibited a negative correlation with the temperature and decreased from 39.65 to 28.26% when the pyrolysis temperature increased from 400 to 700 °C. This phenomenon could have occurred due to the loss of more volatile substances and the thermal degradation of lignocellulose with increasing temperature, thus reducing the yield of biochar 26 , 27 . The S BET of the original biochar showed little difference below 700 °C but increased significantly at 700 °C.…”

Section: Resultsmentioning

confidence: 99%

Adsorption characteristics and mechanisms of Cd2+ from aqueous solution by biochar derived from corn stover

Chen

Sun

Liang

et al. 2022

Sci Rep

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Corn stover could be pyrolysed to prepare biochar for removing pollutants in water and realizing the resource utilization of biomass. The aims of the present study were to investigate the optimal preparation and adsorption conditions of biochar and to reveal the adsorption characteristics and mechanisms of Cd2+ in water by biochar. For this purpose, with Cd2+ as the target pollutant, the pyrolysis conditions involved in the pyrolysis temperature, retention time, and heating rate were evaluated and optimized. Additionally, the characteristics, mechanisms and optimal adsorption conditions of Cd2+ by biochar were determined. A series of characterization techniques was employed, including scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and specific surface area analysis (SBET). The optimum pyrolysis parameters were a pyrolysis temperature of 700 °C, a retention time of 2.5 h, and a heating rate of 5 °C/min. Acid/base modification did not improve the adsorption capacity of biochar. The Langmuir and the Elovich model were the most suitable isotherm and kinetic models for equilibrium data, respectively. The maximum adsorption capacity fitted by Langmuir model was 13.4 mg/g. Furthermore, mineral precipitation and π electron interactions were shown to be the main adsorption mechanisms of Cd2+. The optimum adsorption conditions for Cd2+ in water were a CaCl2 electrolyte solution of 0.01 mol/L, a pH level of 6.7, and a biochar dosage of 0.4 g. Our results indicated that corn stover biochar was an appropriate approach for improving the status of water with Cd2+ contamination in the short term and for promoting a new perspective for the rational utilization of corn stover and the low-cost pollution control of heavy metals in water.

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“… Sakhiya et al (2021) produced biochar from rice straw (RBC) for the removal of Cu (II) in an aqueous solution. The RBC was prepared by pyrolyzing the biomass at different temperatures (300, 400, and 500°C) at a heating rate of 10°C/min.…”

Section: Environmental Remediationmentioning

confidence: 99%

“…FIGURE 2SEM micrographs of the walnut shell biochar, reprinted with permission from the work of Kokab, T., Ashraf, H.S., Shakoor, M.B., Jilani, A., Ahmad, S.R., Majid, M., Hakeem, K. R (2021)…”

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confidence: 99%

Agrowaste-generated biochar for the sustainable remediation of refractory pollutants

Ghosh,

Nandasana,

Webster

et al. 2023

Front. Chem.

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The rapid growth of various industries has led to a significant, alarming increase in recalcitrant pollutants in the environment. Hazardous dyes, heavy metals, pesticides, pharmaceutical products, and other associated polycyclic aromatic hydrocarbons (such as acenaphthene, fluorene, fluoranthene, phenanthrene, and pyrene) have posed a significant threat to the surroundings due to their refractory nature. Although activated carbon has been reported to be an adsorbent for removing contaminants from wastewater, it has its limitations. Hence, this review provides an elaborate account of converting agricultural waste into biochar with nanotextured surfaces that can serve as low-cost adsorbents with promising pollutant-removing properties. A detailed mechanism rationalized that this strategy involves the conversion of agrowaste to promising adsorbents that can be reduced, reused, and recycled. The potential of biowaste-derived biochar can be exploited for developing biofuel for renewable energy and also for improving soil fertility. This strategy can provide a solution to control greenhouse gas emissions by preventing the open burning of agricultural residues in fields. Furthermore, this serves a dual purpose for environmental remediation as well as effective management of agricultural waste rich in both organic and inorganic components that are generated during various agricultural operations. In this manner, this review provides recent advances in the use of agrowaste-generated biochar for cleaning the environment.

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Copper(II) removal from aqua solution using rice straw derived biochar

Cited by 10 publications

References 17 publications

[Retracted] Utilization of Eco‐Friendly Waste Eggshell Catalysts for Enhancing Liquid Product Yields through Pyrolysis of Forestry Residues

[Retracted] Utilization of Eco‐Friendly Waste Eggshell Catalysts for Enhancing Liquid Product Yields through Pyrolysis of Forestry Residues

Adsorption characteristics and mechanisms of Cd2+ from aqueous solution by biochar derived from corn stover

Agrowaste-generated biochar for the sustainable remediation of refractory pollutants

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