Adsorption Properties of Pomelo Peels against Methylene Blue in Dye Wastewater

2013 ◽  
Vol 634-638 ◽  
pp. 178-181 ◽  
Author(s):  
Su Xia Hou
Keyword(s):  
Methylene Blue ◽  
Adsorption Process ◽  
Ph Value ◽  
Removal Rate ◽  
Rate Equations ◽  
Dye Wastewater ◽  
Optimum Conditions ◽  
Isothermal Adsorption ◽  
Pomelo Peel ◽  
Blue Solution

Pomelo peel was chosen as adsorbent to treat the simulated dye wastewater with methylene blue. The research results showed the removal rate of 140mg/L methylene blue solution with 100mL could reach more than 83% under the optimum conditions, which were as follows: 0.4g pomelo peels powder, reaction temperature 30°C, pH value 8 and oscillating time 60min.Theoretical saturation absorptive capacity of pomelo peel was 133mg/g at 30°C.The whole adsorption process can be well described by the Langmuir and Temkin isothermal adsorption equation and secondary adsorption rate equations.

Study of Adsorption Process and Performance of Neutral Red Dye Wastewater by Bamboo Shoot Hulls

2013 ◽  
Vol 295-298 ◽  
pp. 1647-1653 ◽  
Author(s):  
Xin Long Jiang ◽  
Yi Hua Jiang ◽  
Cheng Gang Cai
Keyword(s):  
Adsorption Process ◽  
Ph Value ◽  
Physical Adsorption ◽  
Neutral Red ◽  
Rate Equations ◽  
Bamboo Shoot ◽  
Dye Wastewater ◽  
Adsorption Time ◽  
Freundlich Isotherms ◽  
Red Dye

Surface response optimization of adsorption process of neutral red dye wastewater by bamboo shoot hulls with the factors of pH value, amount of adsorbent, adsorption temperature, adsorption time and the response of adsorption rate were studied. The optimal parameters for adsorption process were of adsorbent concentration of 100 mg·L-1, adsorbent particle size of 60~80 mesh, pH 4.49, adsorbent amount of 3.65 g·L-1, adsorption time and temperature of 2.23 h and 39.70 °C, respectively. The maximal absorption rate got 98.37%. The adsorption follows the Langmuir and Freundlich isotherms, its dynamic behavior was consistent with the second-order reaction rate equations, the adsorption quantity was 179.3201 mg·g-1 at 30 °C. The apparent thermodynamic calculation of infrared spectroscopy showed that the adsorption process were of a spontaneous heat-emitting physical adsorption other than a simple chemical adsorption. Mechanical study showed that the functional groups were of hydroxyl and carbonyl groups on the pore and rough surfaces inside the hulls of bamboo shoots. Bamboo shoot hulls are good biological adsorption materials.

Preparation of Nano-TiO2 and Performance Study on Photocatalytic Degradation of Methylene Blue

2012 ◽  
Vol 430-432 ◽  
pp. 1040-1043
Author(s):  
Jiang Liu ◽  
Zheng Xian Ma ◽  
Shuai Liang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Ph Value ◽  
Raw Material ◽  
Dye Wastewater ◽  
Performance Study ◽  
Water Addition ◽  
Nano Tio2 ◽  
Blue Solution ◽  
And Performance

Experiment of photocatalytic degradation was conducted through using tetra-n-butyl titanate and ethyl alcohol as raw material, adopting sol-gol method to prepare photocatalyst of nano-TiO2 and using methylene blue solution as analogue dye wastewater. The influences of hydrolyzing temperature, PH value, different water addition, and different speed of adding drops were investigated, as well as the reuse rate of photocatalyst.

scholarly journals Study on the Adsorption of Methylene Blue from Dye Wastewater by Humulus Japonicus Leaves

2021 ◽  
Vol 236 ◽  
pp. 03028
Author(s):  
Zheng-gen Huang ◽  
Tao Wang ◽  
He-ying Yi ◽  
Xiao-bin Li
Keyword(s):  
Methylene Blue ◽  
Adsorption Kinetics ◽  
Adsorption Process ◽  
Adsorption Rate ◽  
Internal Diffusion ◽  
Blue Dye ◽  
Dye Wastewater ◽  
Membrane Diffusion ◽  
Isothermal Adsorption ◽  
Humulus Japonicus

This paper took the objective of preparing high-performance, low-cost biological adsorbent for printing and dyeing wastewater, and the adsorption experiment of dyestuff wastewater with high chromaticity and high biodegradability was studied. The Methylene Blue was adsorbed by the prepared Humulus Japonicus Leaves (HJ), the effects of adsorption time, pH, dosage of adsorbent, initial Methylene Blue concentration and temperature on the adsorption process were investigated, and the adsorption mechanism was described by adsorption isotherm, adsorption thermodynamics and adsorption kinetics, and the results showed that: when HJ was added 0.15g and ph was 7, the temperature was 30°C (303K), adsorption was carried out for 20min, simulated dye wastewater, adsorption efficiency of Methylene Blue of 100mg/l were excellent, adsorption rate reached up to 92%, the equilibrium adsorption rate was positively correlated with the initial concentration of CV dye. Humulus leaves adsorption CV Gibbs free energy of ΔG<0, ΔH>0, ΔS>0 showed spontaneous adsorption process, the adsorption process Methylene Blu was more suitable for the Freundlich isothermal adsorption equation, the adsorption kinetics accorded with the quasi two level kinetic model, the adsorption of the Methylene Blue dye molecule by the HJ was chemically adsorbed as the rate control step, the Methylene Blue molecule was mainly adsorbed on the surface of the Humulus leaves; the model of internal diffusion kinetics showed that there was membrane diffusion and internal diffusion of the HJ in the process of Methylene Blue adsorption. The experimental results showed that HJ as adsorbent can effectively remove Methylene Blue from dye wastewater, and the research results provide a new method and idea for biological treatment of dye wastewater.

Enhancing the removal of methylene blue by modified ZnO nanoparticles: kinetics and equilibrium studies

2017 ◽  
Vol 95 (5) ◽  
pp. 590-600 ◽  
Author(s):  
Taha M. Elmorsi ◽  
Mohamed Hammad Elsayed ◽  
Mostafa F. Bakr
Keyword(s):  
Methylene Blue ◽  
Lewis Acid ◽  
Zno Nanoparticles ◽  
Adsorption Process ◽  
Ph Value ◽  
Removal Rate ◽  
Lewis Base ◽  
Coefficient Of Determination ◽  
Modified Zno Nanoparticles ◽  
Chi Square Analysis

This research aims to use modified ZnO nanoparticles to enhance the removal rate of the methylene blue (MB) dye. ZnO nanoparticles are modified by coating their surface with Congo red (CR) dye, henceforth referred to as ZnO/CR. This process is used to produce a Lewis acid on the surface of ZnO to attract any Lewis base such as a MB dye (MB+). Therefore, the stability of ZnO/CR improved, and it resists the change in pH value (from 3 to 9). Several analysis techniques such as scanning electron microscopy, X-ray diffraction, FTIR, and BET method were used to characterize ZnO/CR. Nonlinear and linear regressions of pseudo first-order, pseudo second-order, and Elovich models were used to calculate the kinetic parameters of the adsorption process. The best-fit kinetic equation was investigated using three functions of error analysis: the sum of the squares of the errors, chi-square analysis, and the coefficient of determination. The intraparticle diffusion equation was used to study the diffusion process. The adsorption process of the MB followed the Langmuir model with a maximum capacity (qm) value of 43.5 mg/g. This value is six times greater than the value calculated with pure ZnO. Thermodynamic parameters ΔS•, ΔH•, and ΔG• were investigated at four temperatures (10, 20, 30, and 40 °C). The uptake process of the MB occurs spontaneously following endothermic process and an increase in the system disorder. The rate of adsorption was controlled mainly by a Lewis acid–base interaction and H bonding. Furthermore, the removal of the MB by ZnO/CR powder worked well as a chemical and physical adsorption process.

Treatment of the Reactive Yellow Dye Wastewater by Microwave Enhanced Fenton Oxidation

2014 ◽  
Vol 675-677 ◽  
pp. 587-591
Author(s):  
Hai Feng Chen
Keyword(s):  
Microwave Power ◽  
Volume Concentration ◽  
Ph Value ◽  
Irradiation Time ◽  
Removal Rate ◽  
Fenton Oxidation ◽  
Dye Wastewater ◽  
Optimum Conditions ◽  
Oxidation Treatment ◽  
Fenton Oxidation Process

Microwave enhanced Fenton oxidation treatment effect of reactive yellow dye wastewater is studied. Through experimental analysis the effect of H2O2 dosage, FeSO4•7H2O dosage, microwave power, irradiation time to dye wastewater Degradation rate. Microwave enhanced Fenton oxidation process treating active yellow dye wastewater optimum conditions: pH value of 3, H2O2 volume concentration of 4mL/L, FeSO4•7H2O concentration of 200mg/L, microwave power of 500W, irradiation time of 7min. Under this condition, reactive yellow dye wastewater removal rate is 92%.

Adsorption of Methylene Blue from Aqueous Solution Using Honeycomb-Cinder

2012 ◽  
Vol 550-553 ◽  
pp. 2259-2262
Author(s):  
Song Bo Cui ◽  
Hua Yong Zhang ◽  
Lu Yi Zhang
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Ph Value ◽  
Dye Wastewater ◽  
Batch System ◽  
Adsorption Data ◽  
Adsorption Processes ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Mb Adsorption

The adsorption behavior of methylene blue (MB) dye from aqueous solutions onto honeycomb-cinder (HC) and its acid-activated product was investigated in a batch system. The results showed the adsorption capacity was decreased for raw HC samples with the increase of pH value, while it was increased for activated samples. The adsorption data were fit with Langmuir isotherm model for MB adsorption by all samples. The MB adsorption capacity on samples was increased from 2.62 mg/g to 7.81 mg/g and 7.00 mg/g after acid-activated by HCl and H2SO4, respectively. The adsorption processes of MB followed pseudo-second-order kinetics with a coefficient of correlation≥0.99. This study demonstrated that acid-activated HC has superior adsorbing ability for MB than raw HC and can be used as alternative adsorbents in dye wastewater treatment.

A Study of Fenton’s Oxidation Pretreatment on Dye Wastewater Containing Acetic Acid

2014 ◽  
Vol 1044-1045 ◽  
pp. 215-218
Author(s):  
Xian Huan Qiu ◽  
Hai Yu ◽  
Peng Fei Deng
Keyword(s):  
Acetic Acid ◽  
Processing Time ◽  
Ph Value ◽  
Removal Rate ◽  
Cod Removal ◽  
Dye Wastewater ◽  
Fenton’S Oxidation ◽  
Effects Of Ph ◽  
Cod Removal Rate ◽  
Fenton's Oxidation

In the presence of acetic acid, the effects of pH, processing time, addition of Fe2+ and H2O2 on dye wastewater treatment were studied. Experimental results showed that in the presence of acetic acid, when the pH value was 4, the processing time was 30.0min, addition of ferrous sulfate was 4.8g/L, and addition of hydrogen peroxide was 56mL/L, the treatment effect was the best, COD removal rate reached 51.0%. Further studied of the effect of the presence of acetic acid on Fenton’s oxidation of dye wastewater, the results showed that without of acetic acid, the COD removal rate was higher than that with acetic acid. And the effect of Fenton's reagent on oxidation of dye substances was interfered by the presence of acetic acid.

scholarly journals Highly efficient and cheap treatment of dye by graphene-doped TiO2 microspheres

2020 ◽  
Author(s):  
Honglian Liang ◽  
Shujun Wang ◽  
Yanhong Lu ◽  
Ping Ren ◽  
Guihua Li ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Wastewater Treatment ◽  
High Efficiency ◽  
Simple Procedure ◽  
Dye Wastewater ◽  
Methylene Blue Solution ◽  
Highly Efficient ◽  
Degradation Reactions ◽  
Blue Solution ◽  
Photocatalytic Reactions

Abstract Highly efficient dye wastewater treatment by photocatalytic catalysis commonly requires expensive catalysts, long degradation time and a complicated procedure. Here, we for the first time prepared cheap graphene-doped titanium dioxide microspheres with a simple procedure to degrade dye with high efficiency. When the catalyst concentration was 0.2 g·L−1, the photocatalysis degradation extent of methylene blue solution, methylene green solution and 1,9-dimethyl methylene blue solution reached 96.4, 85.9 and 98.7%, respectively. The results showed that the degradation reactions accorded with the Langmuir–Hinshelwood model, and the photocatalytic reactions belonged to a first-order reaction in the primary stage. Furthermore, different photocatalytic degradation mechanisms were proposed, which have not been found in other literature. This work opened a new route for simple preparation of cheap microspheres in photocatalytic dye wastewater treatment with high efficiency.

Effect of Catalytic Material in Environment Pollution Treatment

2010 ◽  
Vol 156-157 ◽  
pp. 1323-1326
Author(s):  
Li Nan Zhu ◽  
Yong Jun Wang ◽  
Lin Zhang
Keyword(s):  
Methylene Blue ◽  
Treatment Process ◽  
Removal Rate ◽  
Dye Wastewater ◽  
Environment Pollution ◽  
Solution Ph ◽  
Wastewater Treatment Process ◽  
Catalytic Material ◽  
Pollution Treatment ◽  
High Voltage Discharge

Some catalytic materials can be utilized in environment pollution treatment. The material of ceramisite can be used in dye wastewater treatment process with its good properties. When they were filled in the high voltage discharge reactor, the ceramsite pellets were polarized, and partial discharge could take place beside every pellet, which would promote methylene blue degeneration in the dye wastewater. And when the solution pH>ceramsite pHzpc, the ceramsite surface presented the electronegativity and the ceramsite could adsorb more methylene blue, and removal rate increased.

Photocatalytic Degradation of Methylene Blue on MoS2/TiO2 Nanocomposite

2011 ◽  
Vol 197-198 ◽  
pp. 996-999 ◽  
Author(s):  
Kun Hong Hu ◽  
Yong Kui Cai ◽  
Sai Li
Keyword(s):  
Methylene Blue ◽  
Ph Value ◽  
Visible Light Region ◽  
Methylene Blue Solution ◽  
Initial Concentration ◽  
Degradation Temperature ◽  
Light Region ◽  
Blue Solution ◽  
Degradation Reaction ◽  
Decoloration Rate

A MoS2/TiO2 composite was synthesized and its photocatalytic activity for the degradation of methylene blue was evaluated. The results showed that the nano-MoS2/TiO2 composite presented excellent photocatalytic properties in the degradation reaction of methylene blue, which was ascribed to the good absorption of nano-MoS2/TiO2 in the visible light region. The decoloration rate of methylene blue solution was influenced by the dosage of nano-MoS2/TiO2 and the initial concentration of methylene blue. However, both the pH value and the degradation temperature had negligible effects on the decoloration rate of methylene blue. Moreover, the nano-MoS2/TiO2 composite as the degradation catalyst of methylene blue was of good regeneration properties.

Sign in / Sign up

Export Citation Format

Share Document