The Performance of Different AgTiO2 Loading into Poly(3-Nitrothiophene) for Efficient Adsorption of Hazardous Brilliant Green and Crystal Violet Dyes

Liquid Media ◽

Strong Adsorption ◽

The in-situ polymerization technology was used to successfully produce nanostructured binary nanocomposites (NCs) made from a poly (3-nitrothiophen) matrix (P3NT) that were loaded effectively with nanoparticles (NPs) of silver titanium dioxide (AgTiO2), of varying percentages (10%, 20%, and 30%). A uniform coating of P3NT covers the AgTiO2 NPs. Various methods were performed to confirm the fabrication of the binary P3NT/AgTiO2 NCs adsorbents, such as FTIR, XRD, SEM, and EDX. Both dyes (brilliant green (B.G.) and crystal violet (C.V.)) were removed from liquid media by using the binary P3NT/AgTiO2 NCs. A range of batch adsorption studies was used to optimize various factors that impact the elimination of B.G. or C.V. dyes, including the pH, weight of the binary P3NT/AgTiO2 NC, proportion of AgTiO2 NP, time, and temperature. The pseudo-second-order kinetics ( R 2 = 0.999 ) was better adapted for the adsorption procedure’s empirical data whereby the maximum adsorption capacity of the C.V. dye was 43.10 mg/g and ( R 2 = 0.996 ) the maximum adsorption potential was 40.16 mg/g for B.G. dye, succeeded by the pseudo-second-order kinetics. Moreover, the adhesion of B.G. and C.V. pigments on the layers of NCs involves an endothermic reaction. In addition, the concocted adsorbent not only exhibited strong adsorption characteristics during four consecutive cycles but also possessed a higher potential for its reuse. According to the findings, the NCs might possibly be used as a robust and reusable adsorbent to remove B.G. and C.V. pigments from an aqueous medium.

Uptake of phenol from aqueous solution by burned water hyacinth

Polish Journal of Chemical Technology ◽

10.2478/v10026-008-0027-1 ◽

2008 ◽

Vol 10 (2) ◽

pp. 43-49 ◽

Cited By ~ 3

Author(s):

Mohammed Uddin ◽

Mohammed Islam ◽

Mohammed Abedin

Keyword(s):

Aqueous Solution ◽

Water Hyacinth ◽

Second Order ◽

Point Of Zero Charge ◽

Batch Adsorption ◽

Experimental Conditions ◽

Adsorption Models ◽

Adsorption Sites ◽

Uptake of phenol from aqueous solution by burned water hyacinth The potential of burned water hyacinth (BWH) for phenol adsorption from aqueous solution was studied. Batch kinetic and isotherm studies were carried out under varying experimental conditions of contact time, phenol concentration, adsorbent dosage and pH. The pH at the point of zero charge (pHPZC) of the adsorbent was determined by the titration method and the value of 8.8 ± 0.2 was obtained. The FTIR of the adsorbent was carried out in order to find the potential adsorption sites for the interaction with phenol molecules. The Freundlich and Langmuir adsorption models were used for the mathematical description of adsorption equilibrium and it was found that the experimental data fitted very well to the Langmuir model. Maximum adsorption capacity of the adsorbent was found to be 30.49 mg/g. Batch adsorption models, based on the assumption of the pseudo-first-order and pseudo-second-order models, were applied to examine the kinetics of the adsorption. The results showed that kinetic data closely followed the pseudo-second-order model.

Adsorptive Performance of Polypyrrole-Based KOH-Activated Carbon for the Cationic Dye Crystal Violet: Kinetic and Equilibrium Studies

Adsorption Science & Technology ◽

10.1155/2021/5527594 ◽

2021 ◽

Vol 2021 ◽

pp. 1-11

Author(s):

Abdulaziz Ali Alghamdi ◽

Abdel-Basit Al-Odayni ◽

Naaser A. Y. Abduh ◽

Safiah A. Alramadhan ◽

Mashael T. Aljboar ◽

...

Keyword(s):

Activated Carbon ◽

Crystal Violet ◽

Adsorption Process ◽

Industrial Effluent ◽

Batch Adsorption ◽

Equilibrium Studies ◽

Equilibrium Data ◽

Pseudo Second Order ◽

Rate Controlling Step

The aim of this work was to investigate the adsorptive performance of the polypyrrole-based KOH-activated carbon (PACK) in the removal of the basic dye crystal violet (CV) using a batch adsorption system. The equilibrium data, obtained at different initial CV concentrations ( C 0 = 50 – 500 mg / L ) and temperatures (25–45°C), were interpreted using the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms, with the Langmuir model providing a better fit ( R 2 ≥ 0.9997 ) and a maximum adsorption capacity of 497.51 mg/g at 45°C. Under the examined conditions, the values of the thermodynamic parameters free energy, enthalpy, and entropy indicate a spontaneous, endothermic, and physisorption adsorption process. The kinetic data of the adsorption process were very well described by a pseudo-second-order model ( R 2 ≥ 0.9996 ). However, surface diffusion seems to be the main rate-controlling step. Thus, we concluded that PACK shows commercial potential for the removal of cationic dyes such as CV from industrial effluent.

Equilibrium and Kinetics Study of Adsorption of Crystal Violet onto the Peel ofCucumis sativaFruit from Aqueous Solution

E-Journal of Chemistry ◽

10.1155/2012/457632 ◽

2012 ◽

Vol 9 (3) ◽

pp. 1091-1101 ◽

Cited By ~ 8

Author(s):

T. Smitha ◽

S. Thirumalisamy ◽

S. Manonmani

Keyword(s):

Crystal Violet ◽

Dye Removal ◽

High Efficiency ◽

Ph Value ◽

Dye Adsorption ◽

Second Order ◽

Experimental Conditions ◽

Pseudo Second Order ◽

Cucumis Sativa

The use of low-cost, locally available, high efficiency and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. This study investigates the potential use of the peel ofCucumis sativafruit for the removal of crystal violet (CV) dye from simulated wastewater. The effects of different system variables, adsorbent dosage, initial dye concentration, pH and contact time were investigated and optimal experimental conditions were ascertained. The results showed that as the amount of the adsorbent increased, the percentage of dye removal increased accordingly. Optimum pH value for dye adsorption was determined as 7.0. The adsorption of crystal violet followed pseudo-second order rate equation and fit well Langmuir and Freundlich equations. The maximum removal of CV was obtained at pH 7 as 92.15% for adsorbent dose of 0.2 g/50 mL and 25 mg L-1initial dye concentration at room temperature. The maximum adsorption capacity obtained from Langmuir equation was 34.24 mg g-1. Furthermore, adsorption kinetics of (CV) was studied and the rate of adsorption was found to conform to pseudo-second order kinetics with a good correlation (R2> 0.9739). The peel ofCucumis sativafruit can be attractive options for dye removal from diluted industrial effluents since test reaction made on simulated dyeing wastewater show better removal percentage of (CV).

Removal of V(V) From Solution Using a Silica-Supported Primary Amine Resin: Batch Studies, Experimental Analysis, and Mathematical Modeling

Molecules ◽

10.3390/molecules25061448 ◽

2020 ◽

Vol 25 (6) ◽

pp. 1448

Author(s):

Xi Huang ◽

Zhenxiong Ye ◽

Lifeng Chen ◽

Xujie Chen ◽

Caocong Liu ◽

...

Keyword(s):

Mathematical Modeling ◽

Primary Amine ◽

Treatment Time ◽

In Situ Polymerization ◽

High Mobility ◽

Solution Concentration ◽

Film Mass Transfer ◽

Every year, a large quantity of vanadium-containing wastewater is discharged from industrial factories, resulting in severe environmental problems. In particular, V(V) is recognized as a potentially hazardous contaminant due to its high mobility and toxicity, and it has received considerable attention. In this study, a silica-supported primary amine resin (SiPAR) was prepared by in-situ polymerization, and the V(V) adsorption from the solution was examined. The as-prepared resin exhibited fast adsorption kinetics, and it could attain an equilibrium within 90 min for the V(V) solution concentration of 100 mg/L at an optimum pH of 4, whereas the commercial D302 resin required a treatment time of more than 3 h under the same conditions. Furthermore, the maximum adsorption capacity of the resin under optimum conditions for V(V) was calculated to be 70.57 mg/g. In addition, the kinetics and isotherm data were satisfactorily elucidated with the pseudo-second-order kinetics and Redlich–Peterson models, respectively. The silica-based resin exhibited an excellent selectivity for V(V), and the removal efficiency exceeded 97% in the presence of competitive anions at 100 mmol/L concentrations. The film mass-transfer coefficient (kf) and V(V) pore diffusivity (Dp) onto the resins were estimated by mathematical modeling. In summary, this study provided a potential adsorbent for the efficient removal of V(V) from wastewater.

Removal of brilliant green (BG) by activated carbon derived from medlar nucleus (ACMN) – Kinetic, isotherms and thermodynamic aspects of adsorption

Adsorption Science & Technology ◽

10.1177/0263617420957829 ◽

2020 ◽

Vol 38 (9-10) ◽

pp. 464-482

Author(s):

Moussa Abbas

Keyword(s):

Activated Carbon ◽

Aqueous Medium ◽

Brilliant Green ◽

Second Order ◽

Area Measurement ◽

Bet Surface Area ◽

Experimental Investigations ◽

Order Kinetic ◽

Experimental investigations were undertaken to adsorb Brilliant Green (BG) a toxic dye from aqueous medium using activated carbon derived from the medlar nucleus (ACMN). The adsorption was used to remove BG using ACMN as bio-adsorbent to replace activated carbon still expensive. The prepared adsorbent was characterized by the BET surface area measurement, FTIR spectroscopy and X-ray diffraction. Various parameters such as the initial dye concentration (110–200 mg/L), adsorbent dose (1–6 mg/L), initial pH (2–9) and temperature (298–318 K) were studied to observe their effects on the BG adsorption. Batch studies were conducted in order to determine the optimal parameters required to reach the adsorption equilibrium. The maximum adsorption capacity of ACMN for the BG adsorption at 298 K was found to be 833.15 mg/g. The adsorption kinetic data were analyzed by using several kinetic models namely the pseudo-first-order, pseudo-second-order, Elovich equation, intraparticules diffusion model. It was established that the adsorption obeys the pseudo-second-order kinetic model. The evaluation of thermodynamics parameters such as the free energy ΔG° (−10.584 to −6.413 kJ/mol), enthalpy ΔH° (36.439 kJ/mol) and the change of entropy (0.1438 kJ/mol K) indicated a spontaneous and endothermic nature of the reaction with a chemisorption process. The present adsorbent may be considered as an alternative for the better performance of the BG removal from aqueous medium.

Poly(acrylic acid) modifying bentonite with in-situ polymerization for removing lead ions

Water Science & Technology ◽

10.2166/wst.2012.011 ◽

2012 ◽

Vol 65 (8) ◽

pp. 1383-1391 ◽

Cited By ~ 6

Author(s):

Y. F. He ◽

L. Zhang ◽

D. Z. Yan ◽

S. L. Liu ◽

H. Wang ◽

...

Keyword(s):

Experimental Data ◽

Acrylic Acid ◽

Metal Ions ◽

In Situ Polymerization ◽

Second Order ◽

Order Kinetic ◽

Freundlich Isotherms ◽

Pseudo Second Order ◽

Poly Acrylic Acid

In this paper, a new kind of poly(acrylic acid) modified clay adsorbent, the poly(acrylic acid)/bentonite composite (PAA/HB) was prepared by in-situ polymerization, and utilized to remove lead(II) ions from solutions. The maximum adsorption of adsorbent is at pH 5 for metal ions, whereas the adsorption starts at pH 2. The effects of contact time (5–60 min), initial concentration of metal ions (200–1,000 mg/L) and adsorbent dosage (0.04–0.12 g/100 mL) have been reported in this article. The experimental data were investigated by means of kinetic and equilibrium adsorption isotherms. The kinetic data were analyzed by the pseudo-first-order and pseudo-second-order equation. The experimental data fitted the pseudo-second-order kinetic model very well. Langmuir and Freundlich isotherms were tried for the system to better understand the adsorption isotherm process. The maximal adsorption capacity of the lead(II) ions on the PAA/HB, as calculated from the Langmuir model, was 769.2 mg/g. The results in this study indicated that PAA/HB was an attractive candidate for removing lead(II) (99%).

Removal of Methylene Blue Dye From Aqueous Solution Using PDADMAC Modified ZSM-5 Zeolite as a Novel Adsorbent

10.21203/rs.3.rs-211769/v1 ◽

2021 ◽

Author(s):

Sabarish Radoor ◽

Jasila Karayil ◽

Aswathy Jayakumar ◽

Jyotishkumar Parameswaranpillai ◽

Suchart Siengchin

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Contact Time ◽

Adsorption Process ◽

Nitrogen Adsorption ◽

Second Order ◽

Blue Dye ◽

Batch Adsorption ◽

Abstract In the present work, we modified ZSM-5 zeolite using a bio polymer poly (diallyl dimethyl ammonium chloride) and employed it for the removal of cationic dye, methylene blue from aqueous solution. The chemical and physical properties of the modified ZSM-5 zeolite were investigated using XRD, FTIR, SEM, TEM, nitrogen adsorption, TGA and 27Al NMR. Modified ZSM-5 zeolite possesses high surface area and pore diameter which was confirmed from SEM, TEM and nitrogen adsorption analysis. Adsorption of methylene blue on zeolite was investigated by batch adsorption technique. The effect of different parameters such as zeolite dosage, initial methylene blue concentration, temperature, pH and contact time on the adsorption process was discussed. Maximum adsorption capacity (4.31 mg/g) was achieved using 0.1g of modified ZSM-5 zeolite at the optimum conditions (initial dye concentration: 10 mg/L, pH: 10, temperature:30oC and contact time: 300 min). The experimental data were fitted into Langmuir and Freundlich models and the results indicate that the adsorption process followed Freundlich isotherm. Kinetic data were investigated using pseudo-first-order and pseudo-second-order models. Kinetic analysis indicates that pseudo-second-order model is more suitable to describe adsorption of MB on modified ZSM-5 zeolite. The reusability test suggests that the adsorbent could be reused at least six times without significant loss in removal efficiency.

Biosorption of methylene blue from aqueous solutions by modified mesoporous Simarouba glauca seed shell powder

Global NEST Journal ◽

10.30955/gnj.001723 ◽

2015 ◽

Vol 17 (4) ◽

pp. 701-715 ◽

Cited By ~ 5

Keyword(s):

Methylene Blue ◽

Aqueous Solutions ◽

Kinetic Data ◽

Second Order ◽

Batch Adsorption ◽

Experimental Conditions ◽

Pseudo Second Order ◽

Simarouba Glauca ◽

Shell Powder

<div> <p>The present study investigates the ability of formaldehyde treated <em>Simarouba glauca</em> seed shell powder for removal of methylene blue (MB) from aqueous solutions. Batch adsorption studies were carried out under various experimental conditions such as agitation time, dye concentration, adsorbent dose and pH. The adsorbent was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), XRD, BET and CHNS analysis. The adsorption data were analysed using Langmuir, Freundlich, Temkin and Dubinin - Radushkevich isotherms. Equilibrium data fitted well to Langmuir isotherm with maximum adsorption capacity of 111.1 mg g <sup>-1</sup>. Adsorption kinetic data were verified using pseudo first order, pseudo second order and Intraparticle diffusion model. The kinetic data were found to fit well with pseudo second order model.</p> </div> <p> </p>

Structural Adaptive, Self-Separating Material for Removing Ibuprofen from Waters and Sewage

Materials ◽

10.3390/ma14247697 ◽

2021 ◽

Vol 14 (24) ◽

pp. 7697

Author(s):

Anna Maria Skwierawska ◽

Dominika Nowacka ◽

Paulina Nowicka ◽

Sandra Rosa ◽

Katarzyna Kozłowska-Tylingo

Keyword(s):

Second Order ◽

Isotherm Models ◽

Batch Adsorption ◽

Adsorption Model ◽

Order Model ◽

Scanning Calorimetry ◽

Elementary Analysis ◽

Pseudo Second Order ◽

Experimental Kinetics

β-Cyclodextrin nanosponge (β−CD−M) was used for the adsorption of ibuprofen (IBU) from water and sewage. The obtained material was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), Barrett–Joyner–Halenda (BJH), Harkins and Jura t-Plot, zeta potential, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and elementary analysis (EA). Batch adsorption experiments were employed to investigate the effects of the adsorbent dose, initial IBU concentration, contact time, electrolyte ions and humic acids, and sewage over adsorption efficiency. The experimental isotherms were show off using Langmuir, Freundlich, Hill, Halsey and Sips isotherm models and thermodynamic analysis. The fits of the results were estimated according to the Sips isotherm, with a maximum adsorption capacity of 86.21 mg g−1. The experimental kinetics were studied by pseudo-first-order, pseudo-second-order, Elovich, modified Freundlich, Weber Morris, Bangham’s pore diffusion, and liquid film diffusion models. The performed experiments revealed that the adsorption process fits perfectly to the pseudo-second-order model. The Elovich and Freundlich models indicate chemisorption, and the kinetic adsorption model itself is complex. The data obtained throughout the study prove that this nanosponge (NS) is extremely stable, self-separating, and adjusting to the guest structure. It also represents a potential biodegradable adsorbent for the removal IBU from wastewaters.

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

Novel Adsorbent for Industrial Wastewater Treatment Applications

10.35940/ijitee.l3223.119119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 1219-1225

Keyword(s):

Methylene Blue ◽

Second Order ◽

Thymol Blue ◽

Batch Adsorption ◽

Particle Diffusion ◽

Basic Solution ◽

Order Kinetic ◽

Intra Particle Diffusion ◽

In this study, the hydroxyapatite powder is investigated for both of methylene blue and thymol blue in aqueous solution. The physical and chemical properties of the adsorbent were evaluated systematically using the different techniques including Microsoft Excel programming, linear regression model and also the coefficient of determination. Batch adsorption experiments were conducted to determine the effect of contact time, solution pH, initial dye concentrations, and also the adsorbent dosage on adsorption. The adsorption kinetic parameters confirmed the better fitting of pseudo-second order kinetic model for both of methylene blue and thymol blue. The isotherm data of methylene blue and thymol blue could be well described by the Freundlich isotherm model which means the adsorption is multilayer adsorption with non-uniform distribution of adsorption heat and affinities over the heterogeneous surface. The maximum adsorption capacity (KF) of methylene blue and thymol blue is found to be 0.2736 (L/mg) and 11.18407 (L/mg) respectively. The high specific surface area and the porous structure with some acidic functional groups on the surface were obviously responsible for high dyes adsorption onto hydroxyapatite (HA). Adsorption kinetics data were modeled with the application of Pseudo first order, Pseudo second order and Intraparticle diffusion models. The results revealed that the Pseudo second order model was the best fitting model. Which means that, the adsorption mechanism followed two stages in which the first one was fast and the other was slower step. Which means the adsorption of dye molecules was limited by intra particle diffusion and film diffusion, as well as, the adsorption rate in both of adsorption system are depends only on the slower step.The Boyd plot exposed that the intra-particle diffusion was the rate controlling step of the adsorption process of both of methylene blue and thymol blue molecules by HA powder. However, the adsorption of methylene blue molecules (basic solution) using of HA as adsorbent particles is found to be extremely preferable than thymol blue molecules.