Study of Dyestuff Removal from Solution by Sunflower Seed Husk

2011 ◽  
Vol 236-238 ◽  
pp. 3016-3019
Author(s):  
Siriwan Srisorrachatr
Keyword(s):  
Methylene Blue ◽  
Packed Bed ◽  
Synthetic Wastewater ◽  
Solution Temperature ◽  
Adsorption Model ◽  
Packed Bed Column ◽  
Bed Height ◽  
Optimum Ph ◽  
Seed Husk ◽  
Blue Solution

The removal of dyes from synthetic wastewater by sunflower husk was studied in batch and dynamics removal. The extent of adsorption was studied in batch as a function of burning temperature, chemical treatment, adsorbents size, pH and solution temperature. Methylene blue and Mexican red in aqueous solution was used as synthetic wastewater. Dynamic removal of methylene blue and Mexican red by sunflower husk was also studied in packed bed column. In batch, both dyes were removed with the maximum adsorption by unburned adsorbents. Removal of methylene blue was increased when the adsorbents treated with NaOH whereas treated with HCl for Mexican red. The optimum pH for removal of methylene blue solution was between 4 and 10 and the maximum value for Mexican red was pH 2. The adsorption of methylene blue and Mexican red follows Langmuir adsorption model. In packed bed column, values of column parameter were investigated as a function of flow rate and bed height. Dynamic of adsorption process was modeled by bed depth service time (BDST) and the experimental data were fitted very well to the BDST model

Column Study for Adsorption of Methylene Blue Dye using Azadirachta indica Adsorbent

2020 ◽  
Vol 17 (4) ◽  
pp. 47-52
Author(s):  
Vibha Goswami ◽  
Renu Upadhyaya ◽  
Sumanta Kumar Meher
Keyword(s):  
Methylene Blue ◽  
Flow Rate ◽  
Azadirachta Indica ◽  
Packed Bed ◽  
Blue Dye ◽  
Feed Flow Rate ◽  
Methylene Blue Dye ◽  
Packed Bed Column ◽  
Bed Height ◽  
Percentage Removal

In this study, synthesised Azadirachta indica adsorbent was used for the removal of methylene blue dye using a packed bed column. The effect of feed flow rate, feed methylene blue dye concentration, and bed height of column on percentage removal of dye was studied. It was observed that the column bed exhausted rapidly at a higher flow rate and therefore, a breakthrough occurred faster. However, it was observed that bed exhaustion time increases on increasing the bed height from 2 to 10 inch at 10 mg/L feed dye concentration and feed flow rate of 40 ml/min. It was also found that the breakthrough curve is more dispersed and the percentage removal of dye increases on decreasing the feed methylene dye concentration from 150 to 10 mg/L. The percentage removal was found to be 96.89% at 20 ml/min of feed flow rate under 10 inch of bed height and 10 mg/L of feed dye concentration. The atomic absorption spectrophotometer and scanning electron microscope were used for estimating the effluent dye concentration from the column and morphological study, respectively.

Green Functionalization of Activated Carbon for Dye Removal Application

2015 ◽  
Vol 754-755 ◽  
pp. 719-723 ◽  
Author(s):  
Ahmad Zulfadli Mohamad Hashim ◽  
Suriati Sufian ◽  
Maizatul Shima Shaharun
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Contact Time ◽  
Dye Adsorption ◽  
Batch Process ◽  
Synthetic Wastewater ◽  
Methylene Blue Solution ◽  
Adsorption Study ◽  
Blue Solution ◽  
Standard Calibration

A study of water as the agent of functionalization is still new since most of researchers used acid as the agent of functionalization. The objective of this study is to investigate the used of water as a medium of functionalization of commercialized activated carbon in order to be used in removal of methylene blue dyes from synthetic wastewater via adsorption. The parameters for functionalization of the commercialized activated carbon included temperature at 35°C, contact time of 5 hours and various frequency at 100, 150 and 200 rpm. The experiment was conducted in a batch process where the commercialized activated carbon were functionalized under the mentioned parameters. The functionalized activated carbon were characterized using Fourier Transform Infra-Red (FTIR) Spectroscopy. The FTIR analysis indicated the increase of the amount of functional group attached to the activated carbon. The dye adsorption study was conducted by using methylene blue solution with initial concentration of 500 ppm as adsorbate and the functionalized activated carbon as adsorbent. A standard calibration curve for methylene blue solution was generated using of Ultraviolet-Visible (Uv-Vis) Spectrophotometer. The result from the adsorption study was the parameter of temperature at 35°C, contact time of 5 hours and varying water bath shaker frequency at 100 rpm yield the best adsorption rate.

scholarly journals Batch and Packed Bed Column Study for the Removal of Cr (VI) and Ni (II) Using Agro-Industrial Wastes

2021 ◽  
Vol 11 (19) ◽  
pp. 9355
Author(s):  
Candelaria Tejada-Tovar ◽  
Angel Villabona-Ortíz ◽  
Rodrigo Ortega-Toro
Keyword(s):  
Mesoporous Structure ◽  
Packed Bed ◽  
Industrial Wastes ◽  
Structure Characteristic ◽  
Optimum Conditions ◽  
Packed Bed Column ◽  
Batch Systems ◽  
Bed Height ◽  
Batch System ◽  
Relevant Factors

The objective of this study was to prepare bio adsorbents from agro-industrial wastes from yam starch (YSR) and plantain (PSR) production for its use in the removal of Cr (VI) and Ni (II) in aqueous solution in batch and continuous packed-bed column systems. Bromatological analysis showed that the biomaterials are rich in cellulose, lignin, hemicellulose, and SEM micrographs that evidence a mesoporous structure characteristic of materials of lignocellulosic origin. FTIR evidenced functional groups such as hydroxyl, carbonyl, and methyl, possibly involved in the uptake of metal ions. EDS and FTIR analysis after adsorption confirmed that the retention of the metals on the surface of the adsorbent materials was successful. Cr (VI) and Ni (II) removal efficiencies above 80% were achieved using YSR and PSR in batch systems at the different conditions evaluated. The optimum conditions for removing Ni (II) on PSR were a bed height of 11.4 cm and a temperature of 33 °C, while for YSR, they were: 43 °C and 9 cm for temperature and bed height respectively. The variable with the most significant influence on the removal of Cr (VI) in a batch system on the two bio adsorbents was temperature. In contrast, the adsorbent dose and temperature are relevant factors for PSR Ni (II) removal. Therefore, the residues from the preparation of yam and plantain starch have high potential for removing heavy metals from wastewater and are presented as an alternative for their final disposal.

scholarly journals Packed Bed Biosorption of Lead and Copper Ions Using Sugarcane Bagasse

2016 ◽  
Vol 16 (1) ◽  
pp. 23 ◽  
Author(s):  
Norwin Dale F Duga ◽  
Pauline Edrickke A Imperial ◽  
Allan N Soriano ◽  
Aileen D Nieva
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Sugarcane Bagasse ◽  
Flow Rate ◽  
Copper Ions ◽  
Continuous System ◽  
Packed Bed ◽  
Packed Bed Column ◽  
Varying Parameters ◽  
Bed Height

Bagasse, a waste material from sugarcane has been studied as a biosorbent for removing heavy metals, Pb2+ and Cu2+, in a continuous system using a packed bed column. This study was undertaken to determine the influence of varying the bed height and flow rate on the breakthrough and saturation time. Thomas, Adams-Bohart and Yoon-Nelson models were used to assess the effects of varying parameters and both Thomas and Yoon-Nelson models were found to be satisfactory to describe the column data obtained in the experiment. Moreover, lead ions are adsorbed more efficiently with an adsorption capacity of 4.54 mg/g compared to copper ions with 3.98 mg/g at the most feasible parameters having a flow rate of 100 mL/min and a bed height of 30 cm

scholarly journals Cr(VI) biosorption: Effect of temperature, particle size and bed height

2020 ◽  
pp. 78-86
Author(s):  
Candelaria Nahir Tejada-Tovar ◽  
Angel Villabona-Ortíz ◽  
Rodrigo Ortega Toro
Keyword(s):  
Particle Size ◽  
Fourier Transforms ◽  
Continuous System ◽  
Packed Bed ◽  
Effect Of Temperature ◽  
Infrared Spectrometry ◽  
Packed Bed Column ◽  
Chromium Vi ◽  
Bed Height ◽  
Vis Spectroscopy

The present work aimed to evaluate the effect of temperature, particle size and bed height of the chromium (VI) adsorption process using plantain peels in a continuous system. The experiment was carried out on a packed bed column, adjusting the feed temperature of the solution with a REX-C100 controller coupled to a type K thermocouple. The initial concentration of Cr (VI) was set at 100 ppm, the pH at 2 and the feed rate of 0.75 mL/s. The analyses were performed by UV-Vis spectroscopy using the colourimetric method of 1.5-diphenylcarbazide. The material was characterized by infrared spectrometry by Fourier Transforms (FTIR), from this analysis, it was determined that the OH and NH2 functional groups are the main responsible for the formation of complexes with the cations in solution. Also, it was established that only the particle size is statistically significant. According to the response surface analysis, the optimum conditions of the process were 353.15 K, a particle size of 0.819 mm and a bed height of 67.768 mm. From the thermodynamic study of the process, it is established that it is endothermic and the chemical adsorption prevails in it. The results obtained in the process modelling suggest that Dose-Response can be used reliably to scale the process.

scholarly journals Continuous biosorption of acid red 27 azo dye by Eichhornia crassipes leaves in a packed-bed column

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Allan Eduardo Ramírez-Rodríguez ◽  
Liliana Morales-Barrera ◽  
Eliseo Cristiani-Urbina
Keyword(s):  
Azo Dye ◽  
Eichhornia Crassipes ◽  
Dynamic Performance ◽  
Logistic Models ◽  
Packed Bed ◽  
Operational Parameters ◽  
Packed Bed Column ◽  
Bed Height ◽  
Volumetric Flux ◽  
Charge Point

AbstractIn this work, the biosorption behavior of acid red 27 (AR27) dye using Eichhornia crassipes leaves (LECs) in a packed-bed column was investigated by varying relevant operational parameters and assessment of mathematical models. Results showed that the zero-charge point of LECs was 2.37 and that optima pH and volumetric flux of the influent solution for AR27 biosorption were 2.0 and $$56.5\ \hbox {L}/\hbox {m}^{2}\cdot \hbox {h}$$ 56.5 L / m 2 · h , respectively. The maximum specific and volumetric biosorption capacities were observed at influent AR27 concentrations and with LEC bed heights ranging between 50 and 400 mg/L and 2 and 8 cm, respectively. It was also found that if LEC bed height was increased and volumetric flux and AR27 concentration of the influent solution decreased, service and saturation time increased. Modeling results revealed that the Thomas, bed depth service time, Yoon–Nelson, dose-response, and logistic models accurately described the dynamic performance of the packed-bed column in terms of pH, AR27 concentration, and volumetric flux of influent AR27 solution, as well as that of LEC bed height. The findings revealed that LECs exhibited remarkable potential for the biosorption of AR27 from aqueous solutions in a packed-bed column and could potentially be useful for the treatment of AR27-laden wastewater.

scholarly journals Equilibrium kinetic and isotherm studies of dye colour adsorption on the banana peel

2021 ◽  
Vol 920 (1) ◽  
pp. 012029
Author(s):  
A A A Bakar ◽  
W N R W Mazlan ◽  
I H Izaham ◽  
N S Azizan ◽  
K A M Ali ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Industrial Effluent ◽  
Model Fit ◽  
Synthetic Wastewater ◽  
Banana Peel ◽  
Order Kinetic ◽  
Food Industries ◽  
Pseudo Second Order ◽  
Blue Solution

Abstract Textile, paper, rubber, plastics, leather, cosmetics, pharmaceuticals, and food industries extensively employ dyes. This study aims to determine the best equilibrium kinetic and isotherm model of dye colour adsorption using waste adsorbent. Methylene blue (MB) is a dye colour contaminant that can be removed from wastewater via adsorption due to its ease of usage and cost-effectiveness. This study employed banana peels (BPs), a low-cost and waste adsorbent, to remove MB from synthetic wastewater. A series of batch equilibrium adsorption studies investigated the effect of different dosages of 0.05 to 0.4 grams, contact time of 15 to 150 minutes, and agitation speed of 150 rpm. BPs dosage is added from 0.05 g to 0.4 g in 100 ml of Methylene Blue solution. The concentration of MB in the samples was determined using a HACH DR2800 Spectrometer. According to the kinetic study analysis, the adsorption of MB followed a pseudo-second order kinetic with an R2 of 0.9934. Furthermore, the Freundlich model fit better than others based on the equilibrium isotherm investigation, with an R2 of 0.7688. As a result, BPs can be used as an alternative waste adsorbent media for extracting dye colours from industrial effluent.

Photocatalytic Degradation of Methylene Blue Solution Using Nanometer TiO2 Film

2011 ◽  
Vol 287-290 ◽  
pp. 1823-1826
Author(s):  
Peng Tian ◽  
Hui Zhang ◽  
Zhen Yan Shi ◽  
Ye Lv ◽  
Ting Ting Zhao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Irradiation Time ◽  
Sol Gel ◽  
Solution Temperature ◽  
Tetrabutyl Titanate ◽  
Complexing Agent ◽  
Methylene Blue Solution ◽  
Irradiation Intensity ◽  
Blue Solution

The nanometer TiO2film is achieved by sol-gel method, and using tetrabutyl titanate as source, ethanol as solvent, acetic acid as complexing agent. The nanometer TiO2film is prepared by using spin coating method. Methylene blue solution is degraded by the nanometer TiO2film. The photocatalytic degradation efficiency is influenced by the nanometer TiO2film amount, irradiation time, the UV irradiation intensity and solution temperature. The short degradation time shows that the nanometer TiO2film can be used as an easy and efficient method to degrade methylene blue solution.

scholarly journals Synthesis & Characterization of Magnetit (Fe3O4) and Its Applications As Adsorbent Methylene Blue

2017 ◽  
Vol 11 (2) ◽  
pp. 61
Author(s):  
Retno Agnestisia
Keyword(s):  
Methylene Blue ◽  
Contact Time ◽  
Coprecipitation Method ◽  
X Ray Diffraction ◽  
Ph Optimum ◽  
Adsorption Study ◽  
Batch System ◽  
Optimum Ph ◽  
Blue Solution

Synthesis, characterization and adsorption study of magnetite have beenconducted. Magnetite was synthesized by coprecipitation method. The characterizations of magnetite were carried out with spectroscopy FTIR (Fourier Transform Infrared) and XRD (X-ray diffraction). The adsorption study was conducted using a batch system with the studied adsorption study including optimum pH, optimum contact time and adsorption equilibrium. The results showed that coprecipitation method has succeeded to form magnetite that has magnetism properties. Magnetite can adsorbed methylene blue from aqueous phase, with the maximum adsorption at pH 5 and contact time of 90 minutes.Adsorption of methylene blue by magnetite follows the adsorption pattern of the Langmuir isotherm with the adsorption energy of 25.59 kJ/mol and adsorption capacity of 43.86 mg/g. The results of magnetite synthesis can accelerate the process of separating the adsorbent particles in a methylene blue solution using an external magnetic field.Keywords : magnetite, coprecipitation, adsorption, and methylene blue.

scholarly journals Eucheuma cottonii Seaweed-Based Biochar for Adsorption of Methylene Blue Dye

2020 ◽  
Vol 12 (24) ◽  
pp. 10318 ◽  
Author(s):  
Anwar Ameen Hezam Saeed ◽  
Noorfidza Yub Harun ◽  
Suriati Sufian ◽  
Ahmer Ali Siyal ◽  
Muhammad Zulfiqar ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Large Scale ◽  
Synthetic Wastewater ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Methylene Blue Dye ◽  
Adsorption Model ◽  
Solution Ph ◽  
Eucheuma Cottonii

Pollution from dye containing wastewater leads to a variety of environmental problems, which can destroy plant life and eco-systems. This study reports development of a seaweed-based biochar as an adsorbent material for efficient adsorption of methylene blue (MB) dye from synthetic wastewater. The Eucheuma cottonii seaweed biochar was developed through pyrolysis using a tube furnace with N2 gas, and the properties were later improved by sulfuric acid treatment. The adsorption studies were conducted in a batch experimental setup under initial methylene blue concentrations of 50 to 200 mg/L, solution pH of 2 to 10, and temperature of 25 to 75 °C. The characterization results show that the developed biochar had a mesoporous pore morphology. The adsorbent possessed the surface area, pore size, and pore volume of 640 m2/g, 2.32 nm, and 0.54 cm3/g, respectively. An adsorption test for 200 mg/L of initial methylene blue at pH 4 showed the best performance. The adsorption data of the seaweed-based biochar followed the Langmuir isotherm adsorption model and the pseudo-second-order kinetic model, with the corresponding R2 of 0.994 and 0.995. The maximum adsorption capacity of methylene blue using the developed seaweed‑based biochar was 133.33 mg/g. The adsorption followed the chemisorption mechanism, which occurred via the formation of a monolayer of methylene blue dye on the seaweed-based biochar surface. The adsorption performance of the produced seaweed biochar is comparable to that of other commercial adsorbents, suggesting its potential for large-scale applications.

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