Removal of methylene blue from aqueous solution using wine-processing waste sludge

2012 ◽  
Vol 65 (12) ◽  
pp. 2191-2199 ◽  
Author(s):  
Cheng-Chung Liu ◽  
Yuan-Shen Li ◽  
Yue-Ming Chen ◽  
Hsuan-Hua Li ◽  
Ming-Kuang Wang
Keyword(s):  
Methylene Blue ◽  
Reaction Temperature ◽  
Adsorption Mechanism ◽  
Exchange Capacity ◽  
Maximum Adsorption Capacity ◽  
Processing Waste ◽  
Reaction Conditions ◽  
Waste Sludge ◽  
Biological Methods ◽  
Mb Adsorption

Dye wastewaters usually contain toxins and high chroma, making them difficult to treat with biological methods. The adsorption process plays an important role in removing dyes from wastewaters. This study aimed to explore the methylene blue (MB) adsorption mechanism by wine-processing waste sludge (WPWS). The WPWS contains a high cation-exchange capacity (64.2 cmolc kg−1) and organic matter (52.8%). The parameters affecting MB adsorption included pH, initial concentration of MB, reaction temperature, particle size and dosage of WPWS. The WPWS adsorption isotherms of MB were only well described by Langmuir adsorption isotherm. The maximum adsorption capacity (Qm) of MB was 285.7 mg g−1 at 25 °C. The activation energy determined by Arrhenius equation is 29.995 kJ mol−1. Under steady-state reaction conditions, the Gibb free energy (ΔG°) ranged from −24.607 to −27.092 kJ mol−1 and ΔH° was −8.926 kJ mol−1, indicating that lower reaction temperature would favor MB adsorption. Therefore, MB adsorption by WPWS was a spontaneous, exothermic and physisorption reaction.

scholarly journals Synthesis of activated carbon from biowaste of fir bark for methylene blue removal

2019 ◽  
Vol 6 (9) ◽  
pp. 190523 ◽  
Author(s):  
Lu Luo ◽  
Xi Wu ◽  
Zeliang Li ◽  
Yalan Zhou ◽  
Tingting Chen ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Nonlinear Models ◽  
Low Cost ◽  
High Surface ◽  
High Surface Area ◽  
Raw Material ◽  
Maximum Adsorption Capacity ◽  
Koh Activation ◽  
Mb Adsorption

Activated carbon (AC) was successfully prepared from low-cost forestry fir bark (FB) waste using KOH activation method. Morphology and texture properties of ACFB were studied by scanning and high-resolution transmission electron microscopies (SEM and HRTEM), respectively. The resulting fir bark-based activated carbon (ACFB) demonstrated high surface area (1552 m 2 g −1 ) and pore volume (0.84 cm 3 g −1 ), both of which reflect excellent potential adsorption properties of ACFB towards methylene blue (MB). The effect of various factors, such as pH, initial concentration, adsorbent content as well as adsorption duration, was studied individually. Adsorption isotherms of MB were fitted using all three nonlinear models (Freundlich, Langmuir and Tempkin). The best fitting of MB adsorption results was obtained using Freundlich and Temkin. Experimental results showed that kinetics of MB adsorption by our ACFB adsorbent followed pseudo-second-order model. The maximum adsorption capacity obtained was 330 mg g −1 , which indicated that FB is an excellent raw material for low-cost production of AC suitable for cationic dye removal.

Equilibrium and kinetic studies on MB adsorption by ultrathin 2D MoS2 nanosheets

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11631-11636 ◽  
Author(s):  
Xiu-Qing Qiao ◽  
Fu-Chao Hu ◽  
Feng-Yu Tian ◽  
Dong-Fang Hou ◽  
Dong-Sheng Li
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Kinetic Studies ◽  
Deionized Water ◽  
Maximum Adsorption Capacity ◽  
Mos2 Nanosheets ◽  
Adsorption Ability ◽  
Ultrathin Nanosheets ◽  
Mb Adsorption

MoS2 ultrathin nanosheets display excellent adsorption ability towards methylene blue, with a maximum adsorption capacity of 146.43 mg g−1 in 300 seconds. Moreover, the adsorbent can be resued by washing with deionized water.

scholarly journals Studies on Kinetics, Isotherms, Thermodynamics and Adsorption Mechanism of Methylene Blue by N and S Co-Doped Porous Carbon Spheres

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1819
Author(s):  
Yongpeng Ren ◽  
Feng Chen ◽  
Kunming Pan ◽  
Yang Zhao ◽  
Lulu Ma ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Porous Carbon ◽  
Adsorption Mechanism ◽  
Order Kinetic ◽  
Carbon Spheres ◽  
Single Factor ◽  
Isothermal Adsorption ◽  
Porous Carbon Spheres ◽  
Co Doped ◽  
Mb Adsorption

Heteroatom-doped carbon is widely used in the fields of adsorbents, electrode materials and catalysts due to its excellent physicochemical properties. N and S co-doped porous carbon spheres (N,S-PCSs) were synthesized using glucose and L-cysteine as carbon and heteroatom sources using a combined hydrothermal and KOH activation process. The physicochemical structures and single-factor methylene blue (MB) adsorption properties of the N,S-PCSs were then studied. The optimized N,S-PCSs-1 possessed a perfect spherical morphology with a 2–8-μm diameter and a large specific area of 1769.41 m2 g−1, in which the N and S contents were 2.97 at% and 0.88 at%, respectively. In the single-factor adsorption experiment for MB, the MB adsorption rate increased with an increase in carbon dosage and MB initial concentration, and the adsorption reached equilibrium within 2–3 h. The pseudo-second-order kinetic model could excellently fit the experimental data with a high R2 (0.9999). The Langmuir isothermal adsorption equation fitted well with the experimental results with an R2 value of 0.9618, and the MB maximum adsorption quantity was 909.10 mg g−1. The adsorption of MB by N,S-PCSs-1 was a spontaneous, endothermic, and random process based on the thermodynamics analyses. The adsorption mechanism mainly involved Van der Waals force adsorption, π-π stacking, hydrogen bonds and Lewis acid–base interactions.

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.

Hemicellulose-Based Porous Hydrogel for Methylene Blue Adsorption

2012 ◽  
Vol 560-561 ◽  
pp. 482-487 ◽  
Author(s):  
Zhan Xin Jing ◽  
Xiao Feng Sun ◽  
Qing Ye ◽  
Ya Jing Li
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Adsorption Mechanism ◽  
Maximum Adsorption Capacity ◽  
Methylene Blue Adsorption ◽  
Monolayer Adsorption ◽  
Effects Of Ph ◽  
Alkaline Conditions ◽  
Ft Ir ◽  
Porous Hydrogel

Hemicellulose-based porous hydrogel for methylene blue adsorption from aqueous solution was studied. The surface morphology of sample was analyzed by SEM, finding that it had the porous structure. Effects of pH and initial concentration on the adsorption capacity were investigated. Isotherm studies found that the adsorption of metylene blue onto absorbent was a monolayer adsorption, and the maximum adsorption capacity was 444.44 mg/g. The adsorption mechanism was analyzed by FT-IR, and it showed that the produced -COO- groups in alkaline conditions were advantaged for adsorption process, which offers the impetus for combination of adsorbent and methylene blue. Hemicellulose-based porous hydrogel is an inexpensive and biodegradable material, and can be a promising absorbent for cationic removing from wastewater.

scholarly journals Adsorption of methylene blue onto betel nut husk-based activated carbon prepared by sodium hydroxide activation process

2020 ◽  
Vol 82 (9) ◽  
pp. 1932-1949
Author(s):  
Mondira Bardhan ◽  
Tamanna Mamun Novera ◽  
Mumtahina Tabassum ◽  
Md. Azharul Islam ◽  
Ali H. Jawad ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Chemical Activation ◽  
Maximum Adsorption Capacity ◽  
Activation Process ◽  
Order Kinetic ◽  
Betel Nut ◽  
Non Linear ◽  
Mb Adsorption

Abstract In this study, activated carbon (AC) was prepared from agro-waste betel nut husks (BNH) through the chemical activation method. Different characterization techniques described the physicochemical nature of betel nut husks activated carbon (BNH-AC) through Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), and pH point of zero charge. Later, the produced AC was used for methylene blue (MB) adsorption via numerous batch experimental parameters: initial concentrations of MB dye (25–250 mg/L), contact time (0.5–24 hours) and initial pH (2–12). Dye adsorption isotherms were also assessed at three temperatures where the maximum adsorption capacity (381.6 mg/g) was found at 30 °C. The adsorption equilibrium data were best suited to the non-linear form of the Freundlich isotherm model. Additionally, non-linear pseudo-second-order kinetic model was better fitted with the experimental value as well. Steady motion of solute particles from the boundary layer to the BNH-AC's surface was the possible reaction dynamics concerning MB adsorption. Thermodynamic study revealed that the adsorption process was spontaneous and exothermic in nature. Saline water emerged as an efficient eluent for the desorption of adsorbed dye on AC. Therefore, the BNH-AC is a very promising and cost-effective adsorbent for MB dye treatment and has high adsorption capacity.

Camellia oleifera Abel shells as a new biosorbent to remove methylene blue from aqueous solutions

2011 ◽  
Vol 64 (7) ◽  
pp. 1566-1571 ◽  
Author(s):  
Yudong Lu ◽  
Leying Lin ◽  
Ruiyun You ◽  
Zonghua Wu
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Adsorption Equilibrium ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Camellia Oleifera ◽  
Equilibrium Studies ◽  
West Region ◽  
Middle West ◽  
Mb Adsorption

This study aimed at investigating the feasibility of using Camellia oleifera Abel shell (COAS), an agriculture product in middle-west region in China, for the adsorption of methylene blue (MB), a cationic dye. Batch adsorption experiments were carried out to evaluate the effects of contact time, pH, adsorbent dosage, temperature and initial concentration on the adsorption of MB. Adsorption equilibrium studies showed that MB adsorption followed Langmuir model with a maximum adsorption capacity of 454.54 mg/g. The results demonstrated that the COAS is a promising adsorbent in the removal of MB from aqueous solutions.

Studies on Degradation of Methylene Blue by Potassium Ferrate

2013 ◽  
Vol 781-784 ◽  
pp. 2106-2109
Author(s):  
Jin Lian Li ◽  
Hong Mei Zhang ◽  
Jin Huan Li ◽  
Yan Guang Chen
Keyword(s):  
Methylene Blue ◽  
Reaction Temperature ◽  
Potassium Ferrate ◽  
Reaction Conditions

Methylene blue (MB) was examined for oxidation decoloration. Results indicated that the use of ferrate resulted in effectively removal of chroma which has been explained by oxidation and flocculation interactions. Reaction conditions were optimized concerning ferrate addition mass, reaction temperature and dye concentration. The optimization mass of ferrate and the optimization reaction temperature was observed with decoloration of methylene blue wastewater.

scholarly journals Controllable synthesis and adsorption mechanism of flower-like MoS2/g-C3N4 nanocomposites for removal of methylene blue in water

2021 ◽  
Author(s):  
Zhentao Wang ◽  
Jaafar Hasan ◽  
Jingjing Wang ◽  
Caiwei Zhang ◽  
Waheed Iqbal ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Adsorption Mechanism ◽  
Adsorption Process ◽  
Adsorption Properties ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Kinetic Characteristics ◽  
Controllable Synthesis ◽  
Adsorbent Materials ◽  
Order Kinetic Equation

Abstract The fabrication and adsorption mechanism of flower-like MoS2/g-C3N4 nanocomposites as new adsorbent materials were investigated by batch sorption experiments in this paper. The influence of factors such as pH, adsorbent dosage, concentration and temperature on the adsorption properties of flower-like MoS2/g-C3N4 nanocomposites were studied in detailed. The adsorption isotherm data was fitted with the Langmuir model, and the adsorption kinetic characteristics conform to the quasi second-order kinetic equation. Thermodynamic data showed that the adsorption process of methylene blue (MB) was feasible, endothermic and spontaneous. At 45 ℃, the maximum adsorption capacity was 278.4 mg/g. The adsorbed MB solution was used to water the wheat and chickpea plants within 15 days. Compared with MB solution, the treated MB solution made the plants grow much more better.

scholarly journals Adsorption isotherm modeling for methylene blue removal onto magnetic kaolinite clay: a comparison of two-parameter isotherms

2021 ◽  
Vol 11 (6) ◽  
Author(s):  
Victor O. Shikuku ◽  
Trilochan Mishra
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Synthetic Wastewater ◽  
Bet Surface Area ◽  
Maximum Adsorption Capacity ◽  
Kaolinite Clay ◽  
Co Precipitation ◽  
Two Parameter ◽  
Mb Adsorption

AbstractIn this work, kaolinite clay was modified with magnetic magnetite nanoparticles (Fe3O4@MC) by co-precipitation with ferrous and ferric ions as iron precursors to ameliorate its textural and adsorption capacity for methylene blue (MB) dye uptake from synthetic wastewater at low concentrations. The adsorbents were characterized using XRD, BET surface area analysis, VSM, SEM and HRTEM. The BET surface area after chemical treatment increased from 14.616 to 26.913 m2 g−1. The saturation magnetization of Fe3O4@MC was 6.22 emu g−1 and the exhausted adsorbent recoverable by a simple magnet. Adsorption data were modeled using six nonlinear two-parameter isotherm equations, namely Freundlich, Temkin, Fowler–Guggenheim, Elovich, Flory–Huggins and Langmuir model, and the best-fitting model arrived at using three mathematical error functions. MB adsorption onto unmodified clay was best described by the Fowler–Guggenheim isotherm, whereas MB adsorption onto Fe3O4@MC was best described by the Freundlich model. Increase in BET surface area increased the theoretical and experimental maximum adsorption capacity

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