A bipyridinium-based polyhydrazone adsorbent that exhibits ultrahigh adsorption capacity for the anionic azo dye, direct blue 71

Malah, Tamer El; Nour, Hany F.; Radwan, Emad K.; Mageid, Randa E. Abdel; Khattab, Tawfik A.; Olson, Mark A.

doi:10.1016/j.cej.2020.128195

Cited by 48 publications

(13 citation statements)

References 93 publications

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“…Prior to the discharge of industrial waste, dyes must be completely eliminated to minimize their impact on water pollution. [7][8][9][10][11] Various treatment procedures such as photocatalysis, [12] biodegradation, [13] distillation, [14] ion exchange [15] , and adsorption [16] have been successfully employed for azo dye removal. [17,18] Among them, Nano zero valent iron (nZVI) based chemical reduction method has proven to be one of the most promising methods for degrading azo dyes in water environment, owing to its low cost, environmental friendliness, high reactivity, and facile synthesis.…”

Section: Bimetallic Feni Alloy Nanoparticles Grown On Graphene For Ef...mentioning

confidence: 99%

Bimetallic FeNi Alloy Nanoparticles Grown on Graphene for Efficient Removal of Congo Red From Aqueous Solution

Zou

Zhu

Yuan

2022

Advanced Sustainable Systems

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Nano zero‐valent iron (nZVI) is an effective material for dye wastewater treatment, but excessive agglomeration and oxidation greatly limit its application. Herein, graphene (GR) supported FeNi bimetallic nanoparticles (FeNi@GR) are prepared by alloying and carrier supported dispersion for efficient removal of azo dyes from water. Not only can it effectively solve the problem of excessive agglomeration and oxidation of nZVI, but also the synergistic effect of bimetallic coordination formation and the excellent electron transfer ability of graphene are beneficial to enhance the reactivity of FeNi@GR. The optimal FeNi@GR is prepared by adjusting the content of GR and the removal of Congo red (CR) by FeNi@GR‐10% reached 625 mg g−1 within 150 min at pH = 7.0. Higher temperature and lower pH favor the removal of CR azo dye. The action mechanisms of FeNi@GR presumably involve the transfer of active hydrogen atoms and the transfer of electrons generated by Fe0 and Ni0. Besides, the saturation magnetization (Ms) of FeNi@GR is 68.15 emu g−1, which has excellent magnetic response performance. This work not only provides a simple and efficient method to stabilize nZVI, but also reveals that using FeNi@GR is a promising approach for the remediation of water pollution.

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Section: Bimetallic Feni Alloy Nanoparticles Grown On Graphene For Ef...mentioning

confidence: 99%

Bimetallic FeNi Alloy Nanoparticles Grown on Graphene for Efficient Removal of Congo Red From Aqueous Solution

Zou

Zhu

Yuan

2022

Advanced Sustainable Systems

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“…Molecular weight 1029.86, C.I number 34140 and the molecular structure of DB71 is shown in Fig. 1 [17]. DB71 was obtained by Aldrich.…”

Section: Dyementioning

confidence: 99%

Direct Blue 71 Degradation in the Presence of ZVI and H<sub>2</sub>O<sub>2</sub> Advanced Fenton Process: Determination of Optimum Conditions and Kinetics

Ertugay¹,

Acar²

2022

Pol. J. Environ. Stud.

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This study investigated color and COD removal of azo dye Direct Blue 71 (DB71) by a Fenton-like process in zero-valent iron (Fe 0 = ZVI). The UV-vis spectra of DB71 exhibit three main absorption bands -two in the UV region and one in the visible region. UV-vis spectra showed that the azo linkages in the molecule structure of the dyes were destroyed during the decolorization. The influence of various operational parameters such as pH, ZVI dosages, hydrogen peroxide (H 2 O 2 ) concentrations and temperature are studied to determine the optimum conditions for color and COD removal. pH is highly effective parameter of decolorization and COD destruction in this work. However, H 2 O 2 concentration and ZVI dosages were not only effective in the removal of COD for 100 mgL -1 initial DB71 concentration. Therefore, the optimum ZVI:H 2 O 2 ratio is based on determining the value of COD removal. Optimum conditions were accepted to be pH of 2.5, ZVI:H 2 O 2 ratio 4:1 and 20ºC temperature. The result indicated that 100% of decolorization efficiency was achieved within 20 min in the range of 150-400 mg/L initial DB71 concentrations by using optimal conditions. Residual COD values were 15.38, 22.35, 22.58, 27.04, 31.86 mg/L for 150, 200, 250, 300, 400 mg/L initial DB71 concentrations at the end of reaction time, respectively. Additionally, increasing the reaction temperature from 20 to 40ºC negatively affected the decolorization and degradation rate DB71. The experimental kinetic data are fitted very well the Behnajady-Modirshahla-Ghanbery model for color removal of DB71 dye.

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“…Therefore, developing efficient treatment process to remove MG and dyes, generally, is still a challenging issue worldwide. Numerous approaches have been explored to remove dyes from water (Abdel-Karim et al 2021 ; El Malah et al 2021 ; Margha et al 2020 ). By far, adsorption is the most commonly applied technique for the removal (decolorization) of dyes from water (Alene et al 2021 ; Bekçi et al 2008 ; Güler et al 2021 ; Nour et al 2021 ; Shojaei et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

A dual-functional sulfone biscompound containing 1,2,3-triazole moiety for decolorization and disinfection of contaminated water

Radwan

Rashdan

Hemdan

et al. 2022

Environ Sci Pollut Res

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Water decontamination from toxic dyes and pathogenic microorganisms is critical for life on Earth. Herein, we report the synthesis of sulfone biscompound containing 1,2,3-triazole moiety and evaluation of its dye decolorization and biocidal and disinfection efficiencies. The decolorization efficiency was tested under different experimental conditions, while the biocidal action was examined against various types of waterborne pathogens, and the disinfection of some pathogenic microbes was executed in artificially contaminated water. The findindgs illustrated that the solution initial pH (pHi) affected the decolorization efficiency significantly. About complete removal of 10 mg/L malachite green (MG) dye was achieved after 10 min using 3 g/L of the sulfone biscompound at pHi 6. The pseudo-second-order equation suited the adsorption kinetics accurately, while the equilibrium data was suited by Langmuir isotherm model. Electrostatic, n–π, and π–π interactions brought about the adsorption of MG onto the sulfone biscompound. The biocidal results indicated that the sulfone biscompound had a powerful antibacterial potential against the tested bacterial species. Likewise, the distinction trail revealed that after 70–90 min of direct contact with an effective dose, the tested pathogens could be completely eliminated (6-log reduction). Overall, the newly synthesized sulfone biscompound can efficiently remove cationic dyes and disinfect contaminated water.

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A bipyridinium-based polyhydrazone adsorbent that exhibits ultrahigh adsorption capacity for the anionic azo dye, direct blue 71

Cited by 48 publications

References 93 publications

Bimetallic FeNi Alloy Nanoparticles Grown on Graphene for Efficient Removal of Congo Red From Aqueous Solution

Bimetallic FeNi Alloy Nanoparticles Grown on Graphene for Efficient Removal of Congo Red From Aqueous Solution

Direct Blue 71 Degradation in the Presence of ZVI and H<sub>2</sub>O<sub>2</sub> Advanced Fenton Process: Determination of Optimum Conditions and Kinetics

A dual-functional sulfone biscompound containing 1,2,3-triazole moiety for decolorization and disinfection of contaminated water

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