Removal of Methylene Blue from Aqueous Solution by a Novel PAA@Fe-Si Composite Material

2014 ◽  
Vol 665 ◽  
pp. 479-482
Author(s):  
Chao Shuai ◽  
Yun Wen Liao ◽  
He Jun Gao ◽  
Luan Luan Zhang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Composite Material ◽  
Contact Time ◽  
Maximum Adsorption Capacity ◽  
Cationic Dye ◽  
Solution Ph ◽  
Mb Adsorption ◽  
Scanning Electron ◽  
Better Than

A novel organic-inorganic PAA@Fe-Si composite material was synthesized by acrylic acid and mesoporous iron-incorporated material and used as an efficient and specific adsorbent for the removal of methylene blue (MB), a cationic dye from aqueous solution. The properties of the composite material were characterized by scanning electron microscopy, Fourier transform infrared and thermogravimetric. The effects of initial solution pH, adsorbent dosage, and contact time on MB adsorption and temperature have been investigated. The results showed that the maximum adsorption capacity of PAA@Fe-Si reached 587mg/g at 298 K, which was much better than pure Fe-Si adsorbent.

scholarly journals Fast and Effective Route for Removing Methylene Blue from Aqueous Solution by Using Red Mud-Activated Graphite Composites

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Ha Xuan Linh ◽  
Ngo Thi Thu ◽  
Tran Quoc Toan ◽  
Do Tra Huong ◽  
Bui Thanh Giang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Red Mud ◽  
Contact Time ◽  
Electrochemical Activation ◽  
Maximum Adsorption Capacity ◽  
Graphite Composite ◽  
Isotherm Equation ◽  
Langmuir Isotherm Equation ◽  
Graphite Composites

In this work, the mixture of red mud slurry and inorganic salt ((NH4)2SO4) has been used as an electrolyte for electrochemical activation of graphite. The red mud-activated graphite composite was then used as an adsorbent for removing methylene blue from aqueous solution by the batch method. The effect of pH, contact time, adsorbent dosage, and the initial concentration of methylene blue was investigated. The optimal condition was found at pH 6, contact time 120 min, and amount of adsorbent 1 mg/L. The maximum adsorption capacity was found to be 89.28 mg/g based on the Langmuir isotherm equation, suggesting that the red mud-activated graphite composite is a very potential adsorbent for removing methylene blue and is also used in other coloured wastewater treatments.

scholarly journals Optimization of Methylene Blue Adsorption on Agricultural Solid Waste Using Box–Behnken Design (BBD) Combined with Response Surface Methodology (RSM) Modeling

2021 ◽  
Vol 12 (4) ◽  
pp. 4567-4583
Keyword(s):  
Methylene Blue ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Contact Time ◽  
Organic Dyes ◽  
Low Cost ◽  
Sem Analysis ◽  
Solution Ph ◽  
Box Behnken Design ◽  
Mb Adsorption

Tunics corm saffron (TCS) is a low-cost adsorbent that removes methylene blue (MB) from an aqueous solution. The TCS was characterized using FTIR and SEM analysis. The influence of MB adsorption variables such as TCS dose (0.4–2.4 g L−1), contact time (0–120 min), MB dye concentration (100–500 mg L−1) was optimized Box–Behnken design (BBD) combined with response surface methodology (RSM) modeling. All three variables among the main parameters significantly affected the removal efficiency by applying the quadratic regression analysis. The results showed that the predicted values for MB adsorption were close to the experimental values and were in good agreement. Besides, the r2 value (r2=0.970) indicates that the regression can predict response for the adsorption process in the studied range. The optimum BBD-RSM for MB removal of 89.48 % was recorded at a TCS dose of 1.78 g L−1, contact time of 56 min, MB dye concentration of 176 mg L–1 at solution pH of 5.4 temperature 21 °C. Excellent regeneration of TCS to remove MB in sixth consecutive adsorption-desorption cycles. This work highlights that TCS offers tremendous potential as a low-cost for organic dyes removal from wastewaters.

scholarly journals The Adsorption of Methylene Blue by an Amphiphilic Block Co-Poly(Arylene Ether Nitrile) Microsphere-Based Adsorbent: Kinetic, Isotherm, Thermodynamic and Mechanistic Studies

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1356 ◽  
Author(s):  
Xuefei Zhou ◽  
Mingzhen Xu ◽  
Lingling Wang ◽  
Xiaobo Liu
Keyword(s):  
Methylene Blue ◽  
Adsorption Process ◽  
Selective Adsorption ◽  
Modern Society ◽  
Influential Factors ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Cationic Dye ◽  
Solution Ph ◽  
Arylene Ether

Dye pollution is a serious problem in modern society. We desired to develop an efficient adsorbent for the decontamination of discharged dyes. In this work, the polymeric microspheres derived from a kind of amphiphilic block of co-poly(arylene ether nitrile) (B-b-S-P) were prepared on the basis of “oil-in-water” (O/W) microemulsion method. The B-b-S-P microspheres were found competent to remove the cationic dye, methylene blue (MB); and various influential factors, such as contact time, initial concentration, solution pH and temperature were investigated. Results indicated that the maximum adsorption capacity of B-b-S-P microspheres for MB was 119.84 mg/g at 25 °C in neutral conditions. Adsorption kinetics and isotherm dates were well fitted to a pseudo-second-order kinetic model and the Langmuir isotherm model, and thermodynamic parameters implied that the adsorption process was endothermic. The B-b-S-P microspheres also exhibited a highly selective adsorption for cationic dye MB, even in the presence of anionic dye methyl orange (MO). In addition, the possible adsorption mechanism was studied, suggesting that the electrostatic interaction and π–π interaction could be the main force in the adsorption process.

scholarly journals Thermodynamics, kinetics and isotherm studies on the removal of methylene blue from aqueous solution by calcium alginate

2015 ◽  
Vol 6 (2) ◽  
pp. 301-309 ◽  
Author(s):  
Jixiang Zhang ◽  
Guangxia Zhang ◽  
Qiuxiang Zhou ◽  
Lailiang Ou
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Calcium Alginate ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Diffusion Kinetic ◽  
Solution Ph ◽  
Freundlich Isotherms ◽  
Wide Ph Range ◽  
Intra Particle Diffusion

Calcium alginate (CA) was used as an adsorbent to remove methylene blue (MB) from aqueous solution. The effect of initial dye concentration, contact time, temperature and solution pH on the adsorption of MB onto CA was investigated by batch experiments. The percentage removal of MB decreased with increasing temperature. Comparatively high adsorption capacities were shown over a wide pH range (pH 2–11). More than 93% of MB removal was obtained within 30 min for an initial dye concentration of 1,000 mg/L at an adsorbent dose of 4 g/L. The adsorption equilibrium was investigated by the Langmuir and Freundlich isotherms. The maximum adsorption capacity was 2,355.4 mg/g on the basis of the Langmuir isotherm. Thermodynamic parameters were evaluated, and revealed that the adsorption process was a spontaneous, exothermic and entropy-reduced process. Pseudo-first, pseudo-second and intra-particle diffusion kinetic models were applied to the experimental data, and the results showed that the adsorption was in good agreement with the pseudo-second order kinetic model. Desorption studies implied that CA could be a useful adsorbent for the removal of MB from aqueous solution.

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

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 ◽  
Maximum Adsorption Capacity ◽  
Pseudo Second Order

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.

scholarly journals The nature and kinetics of 2,4-dimethylphenol adsorption in aqueous solution on biochar derived from Sargassum boveanum macroalgae

2020 ◽  
Vol 69 (5) ◽  
pp. 438-452 ◽  
Author(s):  
Mazen K. Nazal ◽  
Durga Rao ◽  
Nabeel Abuzaid
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Maximum Adsorption Capacity ◽  
Solution Ph ◽  
Experimental Conditions ◽  
Freundlich Model ◽  
Adsorptive Removal ◽  
Adsorbate Concentration ◽  
Pseudo Second Order ◽  
Kinetics Of

Abstract Many industries produce 2,4-dimethylphenol (DMP) compound in the wastewater which is persistent, toxic, and carcinogenic. Therefore, an adsorbent was prepared by carbonizing a dried Sargassum boveanum macroalgae. The prepared biosorbent was investigated for adsorptive removal of DMP from aqueous solution. After carbonization, the biochar derived from S. boveanum macroalgae (BCM) removed almost 100% of DMP adsorbate. Effects of contact time, solution pH, adsorbate concentration, adsorbent mass, and temperature have been studied. It has been found that, within the experimental conditions, the maximum adsorption capacity is 17 mg/g, rate of adsorption follows pseudo-second order kinetics and the adsorption isotherm experimental data fit the Freundlich model. The thermodynamic parameters were calculated and it has been found that the adsorption of DMP on BCM is endothermic and thermodynamically favorable, and in addition the surface of BCM adsorbent shows affinity to the DMP molecules. The BCM adsorbent has the capability to remove around 65% of DMP from high saline seawater contaminated with DMP. Moreover, the prepared BCM adsorbent was reusable for at least four times in seawater for removal of DMP contaminant.

Chromium Removal from Aqueous Solution by Microwave-Modified Phosphogypusum

2014 ◽  
Vol 955-959 ◽  
pp. 16-20 ◽  
Author(s):  
Ping Ning ◽  
Lei Shi ◽  
Yue Hong Yang ◽  
Yang Cheng
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Adsorption Process ◽  
Maximum Adsorption Capacity ◽  
Solution Ph ◽  
Freundlich Model ◽  
Chromium Vi ◽  
Removal Capacity ◽  
Ph Range ◽  
Best Fit

The removal of chromium (VI) ions from aqueous solution by microwave-modified phosphogypsum was studied. The removal capacity of microwave-modified phosphogypsum for chromium (VI) ions was examined as a function of solution pH, contact time, adsorbent dosage. Before a series of the adsorption studies, phosphogypsum was pre-conditioned with microwave. It was observed that the adsorption of the chromium (VI) ions onto the phosphogypsum in the pH range of 2 and 11. The chromium (VI) adsorption process was described with the Langmuir and Freundlich theories, and the Freundlich model indicated the best fit to the adsorption process. Maximum adsorption capacity of microwave-modified phosphogypsum was found to be 3.126 mg g−1. The results proved that the microwave-modified phoshogypsum is a suitable adsorbent for the removal of chromium (VI) ions from aqueous solution.

scholarly journals Sumac Leaves as a Novel Low-Cost Adsorbent for Removal of Basic Dye from Aqueous Solution

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Öznur Dülger ◽  
Fatma Turak ◽  
Kadir Turhan ◽  
Mahmure Özgür
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Low Cost ◽  
Second Order ◽  
Initial Solution ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Solution Ph ◽  
Intraparticle Diffusion Model ◽  
Pseudo Second Order

Sumac Leaves (SL) (Rhus Coriaria L. ) were investigated as an inexpensive and effective adsorbent for the adsorption of methylene blue (MB) from aqueous solution. The effects of initial dye concentration, initial solution pH, phases contact time, and adsorbent dose on the adsorption of MB on SL were investigated. The amount of dye adsorbed was found to vary with initial solution pH, Sumac Leaves dose, MB concentration, and phases contact time. The Langmuir and Freundlich adsorption models were evaluated using the experimental data and the experimental results showed that the Langmuir model fits better than the Freundlich model. The maximum adsorption capacity was found to be 151.69 mg/g from the Langmuir isotherm model at 25°C. The value of the monolayer saturation capacity of SL was comparable to the adsorption capacities of some other adsorbent materials for MB. The adsorption rate data were analyzed according to the pseudo-first order kinetic and pseudo-second order kinetic models and intraparticle diffusion model. It was found that kinetic followed a pseudo-second order model.

Synthesis of Lignin-Base Bead Adsorbent and its Application in Removing Pb (II) from Aqueous Solution

2011 ◽  
Vol 391-392 ◽  
pp. 773-777 ◽  
Author(s):  
Ya Ling Huang ◽  
Ru Lin Fu ◽  
Zhen Kun Huang ◽  
Xian Su Cheng
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Maximum Adsorption Capacity ◽  
Condensation Polymerization ◽  
High Concentration ◽  
Modified Lignin ◽  
Scanning Electron ◽  
Better Than

A spherical amine modified lignin-base adsorbent had been prepared (L-BAA) by condensation polymerization of lignin with epoxy chloropropane and diamines. The modified products were characterized by FTIR spectra and scanning electron microscopy. Few researches on adsorbing Pb (II) of high concentration from aqueous had been reported. The spherical lignin-base adsorbent was used to adsorb Pb (II) of high concentration from aqueous solution. The effect of shaking time, pH value and temperature on adsorption had been investigated in the study. It was indicated that the adsorption was dependent on pH and temperature of Pb (II) aqueous solution. The maximum adsorption capacity was 151.0 mg/g at follow condition: pH value was 4.00 and temperature was 35°C. The adsorption capacity was better than other reported adsorbents.

Removal of Methylene Blue and Orange-G from Waste Water Using Magnetic Biochar

2015 ◽  
Vol 14 (04) ◽  
pp. 1550009 ◽  
Author(s):  
N. M. Mubarak ◽  
Y. T. Fo ◽  
Hikmat Said Al-Salim ◽  
J. N. Sahu ◽  
E. C. Abdullah ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Contact Time ◽  
Agitation Speed ◽  
Adsorption Kinetic ◽  
Maximum Adsorption Capacity ◽  
Optimum Conditions ◽  
Magnetic Biochar ◽  
Design Expert ◽  
Orange G ◽  
Pseudo Second Order

The study on the removal of methylene blue (MB) and orange-G dyes using magnetic biochar derived from the empty fruit bunch (EFB) was carried out. Process parameters such as pH, adsorbent dosage, agitation speed and contact time were optimized using Design-Expert Software v.6.0.8. The statistical analysis reveals that the optimum conditions for the maximum adsorption of MB are at pH 2 and pH 10, dosage 1.0 g, and agitation speed and contact time of 125 rpm and 120 min respectively. While for orange-G, at pH 2, dosage 1.0 g, and agitation speed and contact time of 125 rpm and 120 min respectively. The maximum adsorption capacity of 31.25 mg/g and 32.36 mg/g for MB and orange-G respectively. The adsorption kinetic for both dyes obeyed pseudo-second order.

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