Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Shirvanimoghaddam, Kamyar; Czech, Bożena; Tyszczuk‐Rotko, Katarzyna; Fakhrhoseini, Seyed Mousa; Yadav, Ramdayal; Naebe, Minoo

doi:10.1016/j.jare.2021.08.001

Cited by 27 publications

(6 citation statements)

References 67 publications

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“…With increasing the concentration, similar results were observed, which shows that these anions have no effect. In contrast, anions such as NO 3 − , CO 3 2− , and SO 4 2− changed the removal efficiency of fluoride due to their high charge density, according to the HSAB concept [ 31 ]. These anions compete with F − for active spots on the surface during the adsorption process, which decreased the fluoride adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Different groups, such as phenolic, carboxylic, aromatic, and oxyl/hydroxyl groups, are present in these biochemical parts, which help to remediate the toxic elements [ 30 ]. Therefore, using tea waste for biochar production might be a feasible approach for waste administration and renewable material for defluoridation of groundwater [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Nanoarchitectonics and Kinetics Insights into Fluoride Removal from Drinking Water Using Magnetic Tea Biochar

Ashraf

Chen

et al. 2022

IJERPH

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Fluoride contamination in water is a key problem facing the world, leading to health problems such as dental and skeletal fluorosis. So, we used low-cost multifunctional tea biochar (TBC) and magnetic tea biochar (MTBC) prepared by facile one-step pyrolysis of waste tea leaves. The TBC and MTBC were characterized by XRD, SEM, FTIR, and VSM. Both TBC and MTBC contain high carbon contents of 63.45 and 63.75%, respectively. The surface area of MTBC (115.65 m2/g) was higher than TBC (81.64 m2/g). The modified biochar MTBC was further used to remediate the fluoride-contaminated water. The fluoride adsorption testing was conducted using the batch method at 298, 308, and 318 K. The maximum fluoride removal efficiency (E%) using MTBC was 98% when the adsorbent dosage was 0.5 g/L and the fluoride concentration was 50 mg/L. The experiment data for fluoride adsorption on MTBC best fit the pseudo 2nd order, rather than the pseudo 1st order. In addition, the intraparticle diffusion model predicts the boundary diffusion. Langmuir, Freundlich, Temkin, and Dubnin–Radushkevich isotherm models were fitted to explain the fluoride adsorption on MTBC. The Langmuir adsorption capacity of MTBC= 18.78 mg/g was recorded at 298K and decreased as the temperature increased. The MTBC biochar was reused in ten cycles, and the E% was still 85%. The obtained biochar with a large pore size and high removal efficiency may be an effective and low-cost adsorbent for treating fluoride-containing water.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanoarchitectonics and Kinetics Insights into Fluoride Removal from Drinking Water Using Magnetic Tea Biochar

Ashraf

Chen

et al. 2022

IJERPH

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“…Unlike conventional heating, electromagnetic heating is due to a volumetric absorption of electromagnetic energy by the heated material [107,108]. This naturally leads to faster and more efficient heating in materials with reasonably high dielectric properties [107,[109][110][111][112]. The power dissipated per unit volume in nonmagnetic, uniform materials exposed to electromagnetic fields can be expressed as [37]:…”

Section: Microwave Decontaminationmentioning

confidence: 99%

Facemask Global Challenges: The Case of Effective Synthesis, Utilization, and Environmental Sustainability

et al. 2022

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Coronavirus disease (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has caused a rapidly spreading pandemic and is severely threatening public health globally. The human-to-human transmission route of SARS-CoV-2 is now well established. The reported clinical observations and symptoms of this infection in humans appear in the range between being asymptomatic and severe pneumonia. The virus can be transmitted through aerosols and droplets that are released into the air by a carrier, especially when the person coughs, sneezes, or talks forcefully in a closed environment. As the disease progresses, the use and handling of contaminated personal protective equipment and facemasks have become major issues with significant environmental risks. Therefore, providing an effective method for treating used/contaminated facemasks is crucial. In this paper, we review the environmental challenges and risks associated with the surge in facemask production. We also discuss facemasks and their materials as sources of microplastics and how disposal procedures can potentially lead to the contamination of water resources. We herein review the potential of developing nanomaterial-based antiviral and self-cleaning facemasks. This review discusses these challenges and concludes that the use of sustainable and alternative facemask materials is a promising and viable solution. In this context, it has become essential to address the emerging challenges by developing a new class of facemasks that are effective against the virus, while being biodegradable and sustainable. This paper represents the potentials of natural and/or biodegradable polymers for manufacturing facemasks, such as wood-based polymers, chitosan, and other biodegradable synthetic polymers for achieving sustainability goals during and after pandemics.

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“…The materials like Coal fly ash modified hydroxyapatite, iron doped Ethiopian nano clay, Hydrocalcite/hydroxyapatite impregnated carbon nanotubes, magnetic nanoparticles modified chitosan incorporated biochar, iron nanoparticles impregnated tea waste, magnetic nanoparticles decorated tea waste biochar, etc. have been employed for removal of multiple heavy metals (Cu(II), Ni(II), Cr(VI)) with uptake capacities ranging from 11.97-200.80 mg g -1 , but consumed prolonged time (2-72 hours) to reach equilibrium stage [8][9][10][11][12][13] (S1 Table ). Among these multifarious adsorbents, biochar-based ones have attracted much more attention owing to their low cost and easy availability of the raw materials especially if they are waste-derived.…”

Section: Introductionmentioning

confidence: 99%

Biochar supported metallo-inorganic nanocomposite: A green approach for decontamination of heavy metals from water

Khalid,

Chaudhary,

Nazir

et al. 2023

PLoS ONE

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Heavy metal contamination of water has become a global environmental burden, which has stirred up agitation worldwide. Fabrication of adsorbents utilizing either low cost, environment friendly materials or waste products can be helpful in remediating environmental pollution. The current study evolved around the synthesis of nanocomposites derived from such raw precursors like spent tea waste biochar, hydroxyapatite, and clays. In this context, two nanocomposites, namely manganese ferrite doped hydroxyapatite/kaolinite/biochar (TK-NC) and manganese ferrite doped hydroxyapatite/vermiculite/biochar (TV-NC), were synthesized followed by their employment for decontamination of heavy metals from aqueous media. TK-NC and TV-NC exhibited the crystallite sizes in the range of 2.55–5.94 nm as obtained by Debye Scherrer Equation and Williamsons–Hall equation The fabricated nanocomposites were characterized using FT-IR, SEM-EDX, and powder XRD. Batch adsorption studies were performed, and influence of different adsorption parameters (contact time, reaction temperature, solution pH, adsorbent dose, and initial adsorbate concentration) on metal adsorption was examined. Thermodynamic studies revealed that the adsorption of Cr(VI), Ni(II) and Cu(II) on TK-NC and TV-NC was endothermic (+ΔH°) and indicates disorderness (+ΔS°) at the solid-liquid interface owing to the strong affinity of metal ions with adsorbent. The heavy metal uptake selectivity followed the following decreasing order; Cr(VI) > Cu(II) > Ni(II) by both nanocomposites, with adsorption capacities falling in the range of 204.68–343.05 mg g-1. Several adsorption kinetic and isotherm models were applied to experimentally calculated data, which suggest favorable adsorption of Cr(VI), Ni(II) and Cu(II) by TK-NC and TV-NC from the system while obeying general-order kinetics and R-P adsorption model, conferring the transition in adsorption kinetics order and involvement of multiple adsorption process.

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Sustainable synthesis of rose flower-like magnetic biochar from tea waste for environmental applications

Abstract: Graphical abstract

Cited by 27 publications

References 67 publications

Nanoarchitectonics and Kinetics Insights into Fluoride Removal from Drinking Water Using Magnetic Tea Biochar

Nanoarchitectonics and Kinetics Insights into Fluoride Removal from Drinking Water Using Magnetic Tea Biochar

Facemask Global Challenges: The Case of Effective Synthesis, Utilization, and Environmental Sustainability

Biochar supported metallo-inorganic nanocomposite: A green approach for decontamination of heavy metals from water

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