The uptake of Eriochrome Black T dye from aqueous solutions utilizing waste activated sludge: Adsorption process optimization using factorial design

Aly-Eldeen, Mohamed A.; El-Sayed, Abeer A.M.; Salem, Dalia M.S.A.; Zokm, Gehan M. El

doi:10.1016/j.ejar.2018.09.001

Cited by 50 publications

(12 citation statements)

References 38 publications

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“…As reported in some literature, increasing the initial concentration of adsorbate could increase its removal efficiency, because the initial concentration provided a strong driving force viz. the concentration gradient to overcome the mass transfer resistance between the aqueous phase and the solid [1,26]. In the present study, the same trend was found.…”

Section: Resultssupporting

confidence: 85%

“…Dyeing wastewater is characterized as having complex components and high chrominance. It contains various toxic and highly non-degradable organic compounds and has very high chemical oxygen demand (COD), biological oxygen demand (BOD), and high acidity or alkalinity [1,2]. Dyeing wastewater is regarded as one of the hardest-to-treat forms of industrial wastewater [3].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Sludge-Derived Activated Carbon by Fenton Activation and the Adsorption of Eriochrome Black T

Wen

Zhang

et al. 2019

Materials

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Sludge-derived activated carbon (SAC) was prepared by Fenton activation and calcination, and used as adsorbent to eliminate Eriochrome Black T (EBT) dye from aqueous media. The characterization results indicated that the produced SAC had a porous structure, high specific surface area, and abundant functional groups on its surface. The adsorption process was affected by pH, adsorbent dosage, time, and temperature. The adsorption capacity increased with temperature, and the highest adsorption capacity reached 178.2 mg·g−1 in 48 h at 318 K and pH 6. The results of the adsorption isotherm, kinetic, and thermodynamic analyses revealed that the adsorption of EBT onto SAC was naturally endothermic and spontaneous, involved both physical and chemical processes, and belonged mostly to the multilayer type of adsorption.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Preparation of Sludge-Derived Activated Carbon by Fenton Activation and the Adsorption of Eriochrome Black T

Wen

Zhang

et al. 2019

Materials

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“…All experiments were performed at a temperature of 27 ± 1°C. e adsorption study's variables were as follows: dye concentration (10,20,30,40,50, and 80 mg/L), initial pH of solution (2, 3, 5, 7, and 9), adsorbent dosage (0.02, 0.04, 0.08, and 0.1 g/50 mL), and contact time (1, 3, 5, 10, 20, and 30 min). Table 1 shows characteristics of Eriochrome black T dye [29].…”

Section: Structural and Surface Characterization Of The Nsg Nanocompomentioning

confidence: 99%

“…Table 1 shows characteristics of Eriochrome black T dye [29]. e equilibrium adsorption capacity q e (mg/g) and the percentage removal were determined using the following equations [30]:…”

Section: Structural and Surface Characterization Of The Nsg Nanocompomentioning

confidence: 99%

Environmentally Friendly Mesoporous Nanocomposite Prepared from Al-Dross Waste with Remarkable Adsorption Ability for Toxic Anionic Dye

Ahmed

Al‐Radadi

Hussein

et al. 2019

Journal of Chemistry

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In this work, a mesoporous nanocomposite composed of nanogibbsite (α-Al(OH)3) and nanosilica was prepared. Gibbsite nanoparticles (GNPs) with a crystal size of ≈38 nm were prepared from Al-dross industrial waste products in an acidic environment at 100°C. Nanosilica (NS) with a crystal size of ≈13 nm was prepared from sodium silicate using dilute hydrochloric acid. The deposition of nanosilica onto gibbsite particles was investigated. The mesoporous silica-gibbsite (NSG) nanocomposite was examined by evaluating its ability to adsorb the toxic anionic dye Eriochrome black T (EBT) from aqueous solution. The compositional and morphological properties of NSG nanocomposites were studied by means of the FTIR spectroscopy, X-ray fluorescence (XRF), XRD, SEM, and TEM techniques. The effect of dye concentration, pH, adsorbent dose, contact time, and temperature was investigated. The sorption models, the isotherms, and the thermodynamic parameters ΔHo, ΔGo, and ΔSo were evaluated. The N2 adsorption-desorption isotherms revealed that mixing the two prepared materials (NS and GNPs) to form the NSG nanocomposite resulted in good properties (a surface area of 62.34 m2·g−1, a pore radius of 22.717 nm, and a pore volume of 0.7081 cm3·g−1). The results show that the prepared NSG nanocomposite has a remarkable ability to adsorb toxic anionic dyes.

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“…Response surface plots [22][23][24] using quadratic models were proposed to describe the behavior of silver nonoparticulate synthesis where two variables fluctuate along the experimental levels. Figure 5 shows absorbance variation when AgNO 3 concentration is fixed on (-) Figure 5a , (0) Figure 5b and (+) Figure 5c.…”

Section: Factorial Designmentioning

confidence: 99%

Factorial Design for Evaluation of Reagent Concentrations on Silver Nanoparticles Stability

Casanova¹,

Ferreira²,

Abreu³

et al. 2019

Br J Anal Chem

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Nanomaterials, especially silver nanoparticles (AgNps) offer unique optical, chemical and physical properties when compared to properties of bulk materials due to their plasmonic ressonance band. Despite AgNps synthesis by chemical reduction is not new, their stability is a crucial factor for a good applicability. AgNps were characterized by UV-vis spectroscopy. Different reports found in literature related to concentrations of used reagents in nanoparticles synthesis are scares when one take into account the high control that is required to avoid nanoparticles aggregation. This study aims to evaluate the concentrations of the reducing agent -NaBH 4 (factor a), stabilizing agent -PVA (factor b) and AgNO 3 (factor c) through a factorial design 2 3 with three center points of face centered to evaluate the influence of reagents and their concentrations on AgNps stability. The interaction between factors "a" and "c" showed a positive significant value when concentrations are modified from level (-) to level (+) of these two variables. It can be observed an increase of plasmonic band absorption peaks of 18.4% indicating synergism between variables a and c. However, one can notice a decrease of 3.91% of peak's incidence when factor "b" concentrations are increased. It can be inferred that low PVA concentrations (≤ 0.5%) assist the AgNps stability and above this value PVA acts as a chemical inhibitor. Analysis of variance indicated a coded quadratic model of second order. Plots of response surface showed that the ideal synthesis of AgNps happens on the ratio NaBH 4 (mmol) : PVA (%) : AgNO 3 (mmol) of 4:1:2.

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The uptake of Eriochrome Black T dye from aqueous solutions utilizing waste activated sludge: Adsorption process optimization using factorial design

Cited by 50 publications

References 38 publications

Preparation of Sludge-Derived Activated Carbon by Fenton Activation and the Adsorption of Eriochrome Black T

Preparation of Sludge-Derived Activated Carbon by Fenton Activation and the Adsorption of Eriochrome Black T

Environmentally Friendly Mesoporous Nanocomposite Prepared from Al-Dross Waste with Remarkable Adsorption Ability for Toxic Anionic Dye

Factorial Design for Evaluation of Reagent Concentrations on Silver Nanoparticles Stability

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