Experimental data on the removal of acid orange 10 dye from aqueous solutions using TiO2/Na-Y zeolite and BiVO4/Na-Y zeolite nanostructures: A comparison study

Multicomponent adsorption of benzene, toluene, ethylbenzene, and xylene (BTEX) was assessed in aqueous solutions by montmorillonite modified with tetradecyl trimethyl ammonium bromide (TTAB-Mt). Batch experiments were conducted to determine the influences of parameters including loading rates of surfactant, contact time, pH, adsorbate concentration, and temperature on the adsorption efficiency. Scanning electron microscope (SEM) and X-ray diffractometer (XRD) were used to determine the adsorbent properties. Results showed that the modification of the adsorbent via the surfactant causes structural changes of the adsorbent. It was found that the optimum adsorption condition achieves with the surfactant loading rate of 200% of the cation exchange capacity (CEC) of the adsorbent for a period of 24 h. The sorption of BTEX by TTAB-Mt was in the order ofB<T<E<X. The experimental data were fitted by many kinetic and isotherm models. The results also showed that the pseudo-second-order kinetic model and Freundlich isotherm model could, respectively, be fitted to the experimental data better than other available kinetic and isotherm models. The thermodynamic study indicated that the sorption of BTEX with TTAB-Mt was achieved spontaneously and the adsorption process was endothermic as well as physical in nature. The regeneration results of the adsorbent also showed that the adsorption capacity of adsorbent after one use was 51% to 70% of original TTAB-Mt.

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Measurement and Prediction of Densities of Ternary Aqueous Mixtures Involving Sodium Polyacrylate

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.50851 ◽

2004 ◽

Vol 4 (1) ◽

pp. 64

Author(s):

Z. A. Noor Fadzlina ◽

T. T. Teng ◽

M. Abdul Rahman

Keyword(s):

Experimental Data ◽

Aqueous Solutions ◽

Percentage Error ◽

Sodium Polyacrylate ◽

Aqueous Systems ◽

Aqueous Mixtures ◽

Density Prediction ◽

Density Values ◽

Good Agreement

The densities of the binary aqueous solutions of sodium polyacrylate (NaPM) at 20°C, 25°C, and 300C up to 0.17 m and LiCI at 25°C and 300C up to 3.13 m were measured using a vibrating tube digital densitimeter. The measured experimental data were then fitted to the polynomial d = do + IA;m'. The densities of the ternary aqueous systems NaPM-NaCI, NaPM-LiCI, and NaPM-sucrose were also =1 measured from 20°C to 30°C. The isopycnotic equation, Imi / moi was used to predict the densities of the ternary aqueous systems mentioned. The results show that predicted and observed density values are in good agreement. The overall percentage error of density prediction for the system NaPM-NaCI-H20 is 0.067. For the system NaPM-LiCI-HP,the overall percentage error is 0.074; and, for the system NaPM-sucrose-H20, the overall percentage error is 0.065.

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Aqueous solutions that model the cytosol: studies on polarity, chemical reactivity and enzyme kineticsElectronic supplementary information (ESI) available: further results and discussion and tables of experimental data. See http://www.rsc.org/suppdata/ob/b4/b402886d/

Organic & Biomolecular Chemistry ◽

10.1039/b402886d ◽

2004 ◽

Vol 2 (9) ◽

pp. 1404 ◽

Cited By ~ 11

Author(s):

Nabil Asaad ◽

Marie Jetta den Otter ◽

Jan B. F. N. Engberts

Keyword(s):

Experimental Data ◽

Aqueous Solutions ◽

Chemical Reactivity ◽

Supplementary Information

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Sugar Industry: Effect of Dextran Concentrations on the Sucrose Crystallization in Aqueous Solutions

Journal of Engineering ◽

10.1155/2019/7987369 ◽

2019 ◽

Vol 2019 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Abdelali Borji ◽

Fatima-Ezzahra Borji ◽

Abdelaziz Jourani

Keyword(s):

Experimental Data ◽

Aqueous Solutions ◽

Growth Process ◽

Sugar Industry ◽

Nucleation Kinetics ◽

Metastable Zone Width ◽

Zone Width ◽

Industry Effect ◽

Instantaneous Nucleation ◽

Metastable Zone

Using the spectrophotometric method, as a new method, the influence of dextran on the sucrose solubility and metastable zone width has been studied. In agreement with the literature the experimental data show that the dextran has a negligible effect on the sucrose solubility. The results also show that this impurity decreases the sucrose metastable zone width. The study of the nucleation kinetics performed, using Nyvlt’s approach, shows that the dextran accelerates the nucleation and that the nuclei are formed in the solution by instantaneous nucleation. The presence of dextran in the system causes a decrease in the growth rate of sucrose. The growth process of sucrose is governed by a Birth and Spread mechanism. The kinetic parameters of sucrose growth in aqueous solutions without and with dextran were estimated.

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Tailoring Carbon Nanotubes to Enhance their Efficiency as Electron Shuttle on the Biological Removal of Acid Orange 10 Under Anaerobic Conditions

Nanomaterials ◽

10.3390/nano10122496 ◽

2020 ◽

Vol 10 (12) ◽

pp. 2496

Author(s):

Ana Rita Silva ◽

O. Salomé G.P. Soares ◽

M. Fernando R. Pereira ◽

M. Madalena Alves ◽

Luciana Pereira

Keyword(s):

Carbon Nanotubes ◽

Methane Production ◽

Carbon Nanomaterials ◽

Reduction Rate ◽

Granular Sludge ◽

Biological Reduction ◽

Methanogenic Activity ◽

Acid Orange ◽

Biological Removal ◽

Acid Orange 10

Anaerobic treatments have been described for the biodegradation of pollutants. However, the reactions proceed slowly due to the recalcitrant nature of these compounds. Carbon nanomaterials (CNM) intermediate in, and favor, the electron transfer, accelerating the anaerobic reduction of pollutants, which act as final electron acceptors. In the present work, different carbon nanotubes (CNT) with modified surface chemistry, namely CNT oxidized with HNO3 (CNT_HNO3) and CNT doped with nitrogen in a ball milling process (CNT_N_MB) were prepared using commercial CNT as a starting material. The new CNM were tested as redox mediators (RM), 0.1 g L−1, in the biological reduction of the azo dye, Acid Orange 10 (AO10), with an anaerobic granular sludge, over 48 h of reaction. Methane production was also assessed to verify the microorganism’s activity and the CNM’s effect on the methanogenic activity. An improvement in the biological removal of AO10 occurred with all CNM (above 90%), when compared with the control without CNM (only 32.4 ± 0.3%). The best results were obtained with CNT_N_MB, which achieved 98.2 ± 0.1% biological AO10 removal, and an 11-fold reduction rate increase. In order to confer magnetic properties to the CNM, tailored CNT were impregnated with 2% of iron-samples: CNT@2%Fe, CNT@2%Fe_N_MB, and CNT@2%Fe_HNO3. The better performance of the CNT doped with nitrogen was confirmed with CNT@2%Fe_N_MB, and the magnetic character facilitated its recovery after treatment, and did not affect its good catalytic properties. No dye removal was observed in the abiotic assays, so the removal was not due to adsorption on the CNM. Furthermore, the microorganism’s viability was maintained during the assay and methane production was not affected by the presence of the CNM. Despite the toxic character of the aromatic amines formed, detoxification was observed after the biological process with thermally treated CNT.

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