Adsorption of methyl violet and brilliant blue onto poly(vinyl alcohol) membranes grafted with N-vinyl imidazole/acrylic acid

Ajji, Z.; Ali, Ali M.

doi:10.1016/j.nimb.2007.09.004

Cited by 35 publications

(17 citation statements)

References 18 publications

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“…Different treatment techniques (physical, chemical, and biological) have been used to separate colored compounds from wastewater. Biological degradation, photochemical degradation, flocculation, coagulation, reverse osmosis, chemical oxidation, floatation, and adsorption are widely used [9][10][11]. Adsorption on activated carbon (AC) is commonly used owing to its high efficiency and ability to remove many chemical compounds [12], simplicity of design [13], and economic feasibility.…”

Section: Introductionmentioning

confidence: 99%

Brilliant Green Dye Biosorption Using Activated Carbon Derived from Guava Tree Wood

Mansour

Shahawy

Attia

et al. 2020

International Journal of Chemical Engineering

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The removal of brilliant green (BG) dye from an aqueous solution using activated carbon (AC) derived from guava tree wood is conducted in batch conditions. The influence of different factors such as contact time, pH, adsorbent dosage, initial dye concentration, and temperature on the adsorption of BG onto AC was investigated. FTIR, BET, and SEM analyses were performed to determine the characteristics of the material. The isotherm results were analyzed using the Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherms. Linear regression was used to fit the experimental data. It was found that the equilibrium data are best represented by the Freundlich isotherm, and the adsorption capacity (qe) was 90 mg dye/g AC. The values of the free energy (∆G), enthalpy (∆H), and entropy (∆S) were −86.188 kJ/mol, 43.025 kJ/mol, and 128 J/mol.K, respectively, at pH 7 for the BG dye. The kinetics of BG dye adsorption were analyzed using pseudo-first-order and pseudo-second-order models, and it was found that the pseudo-second-order model was suitable for the behavior of the BG dye at R2 = 0.999.

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Section: Introductionmentioning

confidence: 99%

Brilliant Green Dye Biosorption Using Activated Carbon Derived from Guava Tree Wood

Mansour

Shahawy

Attia

et al. 2020

International Journal of Chemical Engineering

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“…Wastewater from textile, pharmaceutical and food processing industry have always been a serious environmental problem, which are harmful to aquatic life and even endanger human health. Many dyes as organic contaminants are usually stable and hardly degradated in conventional wastewater treatment techniques including flocculation, coagulation, chemical precipitation and biological oxidation 10 11 . Developing environment friendly adsorption techniques is thus becoming an important issue to remove organic contaminants in water via simply adsorbing 12 13 .…”

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confidence: 99%

Super adsorption capability from amorphousization of metal oxide nanoparticles for dye removal

Xiao

Liu

et al. 2015

Sci Rep

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Transitional metal oxide nanoparticles as advanced environment and energy materials require very well absorption performance to apply in practice. Although most metal oxides are based on crystalline, high activities can also be achieved with amorphous phases. Here, we reported the adsorption behavior and mechanism of methyl blue (MB) on the amorphous transitional metal oxide (Fe, Co and Ni oxides) nanoparticles, and we demonstrated that the amorphousization of transitional metal oxide (Fe, Co and Ni oxides) nanoparticles driven by a novel process involving laser irradiation in liquid can create a super adsorption capability for MB, and the maximum adsorption capacity of the fabricated NiO amorphous nanostructure reaches up to 10584.6 mgg−1, the largest value reported to date for all MB adsorbents. The proof-of-principle investigation of NiO amorphous nanophase demonstrated the broad applicability of this methodology for obtaining new super dyes adsorbents.

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“…However, they are the major factor which causes water pollution and directly affects human health. Even with very low concentrations, dyes may cause allergenic, teratogenic, mutagenic, carcinogenic, and a series of disorders to human health such as dysfunction of the kidneys, reproductive system, liver, and central nervous system [2,3]. Moreover, these dyes normally possessing complex aromatic structures that provide optical, thermal, and physicochemical stability are nonbiodegradable compounds [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Removal of Congo red and malachite green from aqueous solution using heterogeneous Ag/ZnCo-ZIF catalyst in the presence of hydrogen peroxide

Dang

et al. 2020

Green Processing and Synthesis

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The bimetallic Zn/Co zeolitic imidazole frameworks (ZnCo-ZIFs) were successfully synthesized by a simple solvothermal method at room temperature. Silver elements were afterward doped onto the bimetallic frameworks to form Ag/ZnCo-ZIFs via a facile impregnation method in acetone solvent. The as-synthesized material was used as a heterogeneous catalyst for the removal reaction of Congo red (CR) and malachite green (MG) in the presence of hydrogen peroxide (H2O2). Effects of catalyst dosage, H2O2 concentration, initial concentration of the contaminants, reaction temperature, and reaction time were conducted in this work. The results showed that more than 94% and 98% removal of CR and MG were, respectively, achieved within 45 and 30 min. The presence of Ag also enhanced the removal efficiency of CR and MG. The main mechanism of removal reaction of the organic contaminants could be oxidation via hydroxyl radicals. Moreover, the catalytic activity of the material remained over 90% after four recycling cycles. Due to the efficient reactivity as well as high stability, Ag/ZnCo-ZIFs can be a potential heterogeneous catalyst to remove hazardous dyes from aqueous solution.

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Adsorption of methyl violet and brilliant blue onto poly(vinyl alcohol) membranes grafted with N-vinyl imidazole/acrylic acid

Cited by 35 publications

References 18 publications

Brilliant Green Dye Biosorption Using Activated Carbon Derived from Guava Tree Wood

Brilliant Green Dye Biosorption Using Activated Carbon Derived from Guava Tree Wood

Super adsorption capability from amorphousization of metal oxide nanoparticles for dye removal

Removal of Congo red and malachite green from aqueous solution using heterogeneous Ag/ZnCo-ZIF catalyst in the presence of hydrogen peroxide

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