Process optimization, kinetics and equilibrium of orange G and acid orange 7 adsorptions onto chitosan/surfactant

Zhang, Lei; Cheng, Zhengjun; Guo, Xiao; Jiang, Xiaohui; Liu, Rong

doi:10.1016/j.molliq.2014.06.007

Cited by 54 publications

(21 citation statements)

References 82 publications

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“…In the X70 steel/O-n/HCl studied, the linear coefficients of the response variables (x 1 , x 2 and x 3 ) are significantly different (p < 0.05) [31]. This indicates that the concentration of O-n, temperature, and immersion time are crucial for the inhibition.…”

Section: Xps Analysismentioning

confidence: 93%

“…We then applied RSM method to optimize three parameters: inhibitor concentration (x 1 ), temperature (x 2 ), and immersion time (x 3 ) [31]. The other factors, such as acidity and alkyl chain of inhibitor, were kept constant at their optimum values (5 M HCl, O-16).…”

Section: Xps Analysismentioning

confidence: 99%

“…In addition, the significance of the model coefficients is also investigated based on Student's T test and p-values [31]. According to the p-values obtained (Table 4), all linear and quadratic terms are found to be statistically significant (p < 0.05).…”

Section: Xps Analysismentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and inhibition of N-alkyl-2-(4-hydroxybut-2-ynyl) pyridinium bromide for mild steel in acid solution: Box–Behnken design optimization and mechanism probe

Chen

Jiang

et al. 2015

Corrosion Science

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Section: Xps Analysismentioning

confidence: 93%

Section: Xps Analysismentioning

confidence: 99%

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Synthesis and inhibition of N-alkyl-2-(4-hydroxybut-2-ynyl) pyridinium bromide for mild steel in acid solution: Box–Behnken design optimization and mechanism probe

Chen

Jiang

et al. 2015

Corrosion Science

Self Cite

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“…It causes nausea, dermatitis, methemoglobinemia, irritation of the skin, eyes, mucous membrane and the upper respiratory tract. It is also carcinogenic in nature [48][49][50].…”

Section: Methodsmentioning

confidence: 99%

Synergistic Mechanism of ZnFe2O4/ZnO Nanopowder in Photocatalytic Degradation of Acid Orange 7

Ahmed¹,

Chandrasekhar²,

Jahagirdar³

et al. 2018

Asian J. Chem.

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ZnFe2O4/ZnO nanopowder was prepared by solution combustion method. The characterization of the nanopowder was done by powder X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Powder X-ray diffraction pattern of the nanopowder exhibited the spinel phase of zinc ferrite and wurtzite phase of zinc oxide. The nanopowder was used for the photocatalytic removal of acid orange dye 7 from its aqueous solution. The effect of various factors such as initial dye concentration, dosage of the photocatalyst and irradiation time was studied. An analysis of the results indicated that the dye degradation was more in case of 10 and 20 ppm dye solutions. The dye degradation decreased with increasing initial concentration. ZnFe2O4/ZnO can be used as a better photocatalyst for the removal of dyes from their aqueous solutions.

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“…About 12% of the dyes used in the textile industry enter wastewater, and about 20% of them are discharged to the environment without treatment (10, 11). Acid Orange 7 is among the acidic azo dyes which causes damage to the eyes and skin, and has chronic toxicity and carcinogenicity (12). Today, under intense pressure from public opinion and regulations of conventions, industries are required to treat their wastewater favorably before discharge into the natural environment (13–15).…”

Section: Introductionmentioning

confidence: 99%

Removal of Acid Orange 7 dye from aqueous solutions by adsorption onto Kenya tea pulps; granulated shape

Naraghi¹,

Zabihi²,

Narooie³

et al. 2017

Electron physician

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Background and AimWater resources pollution control is one of the main challenges of our time for researchers. Colored wastewater discharges caused by textile industry activities has added to the concern. In this study, removal of Acid Orange 7 dye (AO7) using Kenya Tea residue absorbent (granular) has been studied.MethodsThis cross-sectional study was conducted in 2016. In this work, initially, tea residue was prepared in three forms of raw, treated with concentrated phosphoric acid, and carbonated, at temperatures of 350, 450 and 500 °C in the chemistry laboratory of Gonabad University of Medical Sciences. Then, efficiency of the above absorbents in the removal of Acid Orange 7 dye in initial concentrations of dye as 50–500 mg/l from water samples in terms of pH 2–10 and 1–10 g/l of adsorbent dose within 20 to 300 minutes was investigated. In addition, their subordination from Langmuir and Freundlich absorption isotherms was also determined. Concentration changes in Acid Orange 7 dye at a wavelength of 483 nm was determined by spectrophotometry and results were reported using descriptive statistics.ResultsResults showed that efficiency of Acid Orange 7 dye removal is higher in acidic pH and higher adsorbent dosage. The highest efficiency of Acid Orange 7 dye removal was 98.41% by raw tea residue absorbent at pH 2, reaction time was 120 minutes and initial concentration of dye was 50 mg/l, which was obtained at adsorbent dosage of 10 g/l. It was determined that the mechanism of absorption acceptably follows Freundlich absorption isotherm (R2=0.97).ConclusionDue to the availability and very low price, optimal performance of Kenya tea raw residue (granular) in Acid Orange 7 dye removal, it can be used as an efficient surface absorber in an absorber from colored wastewater.

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Process optimization, kinetics and equilibrium of orange G and acid orange 7 adsorptions onto chitosan/surfactant

Cited by 54 publications

References 82 publications

Synthesis and inhibition of N-alkyl-2-(4-hydroxybut-2-ynyl) pyridinium bromide for mild steel in acid solution: Box–Behnken design optimization and mechanism probe

Synthesis and inhibition of N-alkyl-2-(4-hydroxybut-2-ynyl) pyridinium bromide for mild steel in acid solution: Box–Behnken design optimization and mechanism probe

Synergistic Mechanism of ZnFe2O4/ZnO Nanopowder in Photocatalytic Degradation of Acid Orange 7

Removal of Acid Orange 7 dye from aqueous solutions by adsorption onto Kenya tea pulps; granulated shape

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