Photocatalytic activity of transition metal ions-loaded activated carbon: Degradation of crystal violet dye under solar radiation

Soliman, Ahmed M.; Elsuccary, S.A.A.; Ali, I. M.; Ayesh, Ahmad I.

doi:10.1016/j.jwpe.2017.04.010

Cited by 47 publications

(9 citation statements)

References 57 publications

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“… 51 The deconvolution of C 1s spectrum for CHAP-SH ( Figure 8 b) showed peaks at 284.82, 287.14, and 289.08 eV corresponding to the C–C, C–S, and O–C=O bonds, respectively. 52 Moreover, the C–S and O–C=O bonds on CHAP-SH were transferred to lower binding energies (286.01 and 288.27 Ev, respectively) after the adsorption of Hg(II), confirming the interaction with Hg(II). Moreover, it should be noted that the strength of the C–S bond on CHAP-SH–Hg was slightly increased and overlapped with the binding energy of the C–S bond due to the formation of the C–O–Hg bond.…”

Section: Results and Discussionmentioning

confidence: 84%

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

et al. 2022

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In this study, the highly crosslinked hyperbranched polyamide-amines (H-PAMAMs) were first prepared via one-pot methods and then modified with thiourea to synthesize a novel adsorbent containing sulfhydryl groups (CHAP-SH), which was used to adsorb Hg(II) ions from aqueous solutions. The adsorption characteristics and mechanism of CHAP-SH for Hg(II) ions were systematically studied. As expected, CHAP-SH exhibited a rapid removal performance toward Hg(II), and the maximum adsorption capacity was 282.74 mg/g at 318 K and pH = 4.5. The whole adsorption behavior could be well described by the pseudo-second-order kinetic model and Langmuir and Redlich–Peterson adsorption isotherm models, which reflected that the adsorption process was mainly monolayer chemisorption. Meanwhile, CHAP-SH had strong selectivity for Hg(II) in the presence of multimetal ions, and it had excellent recoverability after five cycles. In order to further elucidate the adsorption mechanism, the adsorbents before and after adsorption were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and energy-dispersive X-ray spectroscopy, and the results showed that the nitrogen-containing, oxygen-containing, and sulfur-containing groups in the adsorbent molecule had synergistic complexation with Hg(II). These results indicated that the adsorbents had great potential in the future treatment of aqueous solutions containing Hg(II).

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Section: Results and Discussionmentioning

confidence: 84%

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

et al. 2022

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“…Wide-scan survey spectra confirm the presence and atomic concentrations of the elemental C, O, S, and N on the carbon sample surfaces (Table 1). The major elements are C (90.89%) and O (9.11%), and the atomic concentration of O increases in the carboxyl-functionalised carbon [29][30][31][32][33] . Functionalised carbon slurries with concentrations ranging from 1 to 7 phr were added to the NRL.…”

Section: Resultsmentioning

confidence: 99%

Enhanced adsorptive composite foams for copper (II) removal utilising bio-renewable polyisoprene-functionalised carbon derived from coconut shell waste

Kettum

Samart

Chanlek

et al. 2021

Sci Rep

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A bio -renewable polyisoprene obtained from Hevea Brasiliensis was used to produce functionalised carbon composite foam as an adsorbent for heavy metal ions. Functionalised carbon materials (C-SO3H, C-COOH, or C-NH2) derived from coconut shell waste were prepared via a hydrothermal treatment. Scanning electron microscopy images showed that the functionalised carbon particles had spherical shapes with rough surfaces. X-ray photoelectron spectroscopy confirmed that the functional groups were successfully functionalised over the carbon surface. The foaming process allowed for the addition of carbon (up to seven parts per hundred of rubber) to the high ammonia natural rubber latex. The composite foams had open pore structures with good dispersion of the functionalised carbon. The foam performance on copper ion adsorption has been investigated with regard to their functional group and adsorption conditions. The carbon foams achieved maximum Cu(II) adsorption at 56.5 $${\text{mg g}}_{\text{foam}}^{-1}$$ mg g foam - 1 for C-SO3H, 55.7 $${\text{mg g}}_{\text{foam}}^{-1}$$ mg g foam - 1 for C-COOH, and 41.9 $${\text{mg g}}_{\text{foam}}^{-1}$$ mg g foam - 1 for C-NH2, and the adsorption behaviour followed a pseudo-second order kinetics model.

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“…Biomass-derived porous carbon, which possesses a rich pore structure, large speci c surface area, and good adsorption performance, is obtained by heating biomass-based raw materials in the absence of air (Soliman et al, 2017;Daoud et al, 2019;Davarnejad et al, 2020).To promote energy conservation (Jiang et al, 2018), several types of agricultural and forestry waste have been utilized as raw materials for synthesizing porous carbon materials, which are widely used in elds such as gas-liquid adsorption, catalysts, and electrode materials (Chen et al, 2018;Saha et al, 2018;Vinayagam et al, 2018). Furthermore, using treated agricultural and forestry waste or biomass-derived porous carbon is one of the commo and e ective methods for removing all types of water pollutants via adsorption.…”

Section: Introductionmentioning

confidence: 99%

Chestnut-Shell-Derived Magnetic Porous Carbon for Removing Malachite Green Dye from Water

Chang

Zhang

Qin

et al. 2022

J. Chem. Eng. Japan

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A CoFe-based magnetic biomass-derived porous carbon was synthesized via a simple impregnation/calcination method by using chestnut shells as the raw material. The materials were characterized via powder X-ray di raction (XRD), scanning electron microscopy (SEM), and speci c surface area and zeta potential analyses. Further, the e ect of calcination temperature on the properties of the synthesized materials was investigated. The results indicated that the calcination temperature had a signi cant impact on the crystal form and morphology of the materials. The maximum adsorption capacity of the material calcinated at 600°C (CSCF-6) for malachite green (MG) was 69.93 mg/g (0.1916 mmol/g). Furthermore, the MG-adsorption e ciency of CSCF-6 was greater than 90% after repeated use for 7 times and the used CSCF-6 could be recycled easily by applying an external magnetic eld. The process of the adsorption of MG onto CSCF-6 could be described by the Langmuir adsorption isotherm model. Further, the results of the adsorption kinetics study showed that the adsorption process tted well with the pseudo-second-order kinetics model, indicating that the adsorption process was mainly controlled by chemical adsorption. Moreover, the results of the thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic, and higher temperatures were conducive to the adsorption.

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Photocatalytic activity of transition metal ions-loaded activated carbon: Degradation of crystal violet dye under solar radiation

Cited by 47 publications

References 57 publications

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

Adsorption and Removal of Mercury(II) by a Crosslinked Hyperbranched Polymer Modified via Sulfhydryl

Enhanced adsorptive composite foams for copper (II) removal utilising bio-renewable polyisoprene-functionalised carbon derived from coconut shell waste

Chestnut-Shell-Derived Magnetic Porous Carbon for Removing Malachite Green Dye from Water

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