Novel immobilized fibrous natural cotton on Corchorus olitorius stalks biochar@diethylenetriamine@feroxyhyte@diethylenetriamine composite for coagulative removal of silver quantum dots (Ag-QDs) from water

Mahmoud, Mohamed E.; Abouelanwar, Magda E.; Mahmoud, Safe ELdeen M.E.; El‐Bahy, Salah M.

doi:10.1007/s10570-021-04246-2

Cited by 11 publications

(2 citation statements)

References 49 publications

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“…Therefore, this problematic issue was found to limit the utilization of pristine biochars compared to the removal ability of modified ones, especially in high ionic strength wastewater [18]. A number of modified biochar adsorbents, nanosorbents, and biosorbents have been recently designed and effectively implemented in wastewater purification of organic, inorganic and biological contaminants [19][20][21][22][23][24]. For example, a method was developed to enhance removal of Congo red by three pyrolalized biochar from agro-waste (Acacia auriculiformis) at 500 °C and modified with CaCl 2 , AlCl 3 and FeCl 3 as metal salts [25].…”

Section: Introductionmentioning

confidence: 99%

Functional surface homogenization of nanobiochar with cation exchanger for improved removal performance of methylene blue and lead pollutants

Mahmoud

Ursueguía

Mahmoud

et al. 2023

Biomass Conv. Bioref.

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Biochar materials are good examples of sustainable adsorbents with appreciable recent interests and applications in water treatment. The disadvantage of using unmodified pristine biochars in water treatment is mainly related to the inhomogeneous distribution of various surface functional groups. Therefore, the current study is designed to functionalize and homogenize the surface of a selected nanobiochar with a cation exchanger using hydrothermal and solvothermal microwave irradiation. The adsorption behavior of immobilized Amberlite cation exchanger onto Cynara scolymus nanobiochar (ACE@CSNB) was compared versus the pristine Cynara scolymus nanobiochar (CSNB). ACE@CSNB was categorized as a typical mesoporous material (mean pore size = 2.238 nm) and the FT-IR spectra confirmed surface modification via two characteristic peaks at 1140–1250 cm−1 and 1030–1070 cm−1 for R-SO3− with S = O. The TPD–MS analysis of CSNB and ACE@CSNB referred to the presence of carboxyl, lactonic, and acid anhydride groups as well as phenolic moieties. The adsorption behavior of methylene blue dye and lead ions by ACE@CSNB was found much higher than those concluded by CSNB providing maximum adsorptive capacity values owing to the played clear role by Amberlite cation exchanger. Moreover, ACE@CSNB was efficiently regenerated and confirmed MB and Pb(II) removal with 92.26% and 1000 µmol g−1, respectively Finally, the removal efficiency values from three water matrices by ACE@CSNB biochar were characterized as 91.74–98.19% and 96.27–99.14% for Pb(II) and MB, respectively to refer to the validity and applicability of the investigated ACE@CSNB biochar for treatment of these two pollutants from real water samples with excellent efficiency. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Functional surface homogenization of nanobiochar with cation exchanger for improved removal performance of methylene blue and lead pollutants

Mahmoud

Ursueguía

Mahmoud

et al. 2023

Biomass Conv. Bioref.

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“…Thus, heavy metal pollution becomes a serious threat to the global aquatic environment and human health [5,6]. For instance, direct exposure to silver (Ag) can cause human health problems, such as liver and kidney disorders, eye and skin irritation, and chronic problems in the respiratory tract, and silver can also bio-accumulate in the food chain [7,8]. The toxicity of silver (ions and nanoparticles) towards living cells, including human cells, has been demonstrated by several studies [9].…”

Section: Introductionmentioning

confidence: 99%

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Islam

Parvin

Dada

et al. 2022

Biomass Conv. Bioref.

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This study investigates silver adsorption on biochar produced from pyrolysis of spent coffee grounds (SCGs). Biochars were produced from SCGs at temperatures between 500 and 1000 °C. SCG-derived biochars were then characterised by different analytical methods, such as Brunauer-Emmet-Teller (BET), Fourier transform infrared (FTIR), X-ray diffraction (XRD), and investigated for silver removal. The results revealed that the biochar produced at 500 °C offered a maximum surface area of 40.1 m2/g with a yield of 23.48% biochar and the highest silver adsorption capacity of 49.0 mg/g with 99.9% silver removal efficiency. The morphology of adsorbed silver on biochar was determined using scanning electron microscopy–energy-dispersive spectrometry (SEM–EDS), and XRD analyses, which showed an even distribution of silver on the biochar surface. Furthermore, X-ray photoelectron spectroscopy (XPS) confirmed that part of the silver ions was reduced to form metallic silver (Ag0)/silver nanoparticles (Ag NPs) during adsorption. The kinetics and isothermal evaluation suggested that silver adsorption was dominated by the pseudo-second-order model and Langmuir isotherm, which means that silver adsorption was mainly dominated by chemisorption and monolayer on biochar surface. Overall, this study suggests that 500 °C was the most feasible pyrolysis temperature to produce SCG-derived biochar with suitable physicochemical properties that can efficiently adsorb silver species from wastewater. Graphical Abstract

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Assessing the removal efficiency of microplastics: A comparative study using nanosized biochars derived from sustainable sources

Mahmoud,

Abdel-Fattah,

Mahmoud

et al. 2024

Environmental Nanotechnology, Monitoring & Management

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Novel immobilized fibrous natural cotton on Corchorus olitorius stalks biochar@diethylenetriamine@feroxyhyte@diethylenetriamine composite for coagulative removal of silver quantum dots (Ag-QDs) from water

Cited by 11 publications

References 49 publications

Functional surface homogenization of nanobiochar with cation exchanger for improved removal performance of methylene blue and lead pollutants

Functional surface homogenization of nanobiochar with cation exchanger for improved removal performance of methylene blue and lead pollutants

Silver adsorption on biochar produced from spent coffee grounds: validation by kinetic and isothermal modelling

Assessing the removal efficiency of microplastics: A comparative study using nanosized biochars derived from sustainable sources

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