Study on Adsorption of Methylene Blue by the Montmorillonite/poly(γ-Glutamic Acid) Composite

The composite was prepared with montmorillonite (MMT) and poly(γ-glutamic acid) (γ-PGA). Applied the composite as the sorbent, methylene blue as the adsorbate, the influences of the initial concentrations of methylene blue, adsorption time and pH values of the solution on the adsorption capacity of methylene blue by the composite were studied. The experimental results showed that the adsorption capacity of methylene blue by MMT/γ-PGA composite both increased with the increasing of initial concentration of methylene blue and the prolonging of adsorption time, and then approached saturation respectively. The adsorption capacity of methylene blue by MMT/γ-PGA composite increased with the increasing of pH values of methylene blue solution. Meanwhile, the study of adsorption mechanism demonstrated that the adsorption of methylene blue by MMT/γ-PGA composite was Langmuir type, and the adsorption equation wasΓ=0.204c/(1+0.381C).

Download Full-text

Research on the Photocatalytic Degradability of Methylene Blue Solution by Photocatalysis Bamboo Charcoal Fiber Knitted Fabric

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.332-334.1040 ◽

2011 ◽

Vol 332-334 ◽

pp. 1040-1044 ◽

Cited By ~ 1

Author(s):

Qiu Mei Wang ◽

Lei Tan ◽

Rong Wen Zhou ◽

Zhi Wei Zou ◽

Xue Mei Xu

Keyword(s):

Methylene Blue ◽

Photocatalytic Degradation ◽

Degradation Rate ◽

Liquid Level ◽

Knitted Fabric ◽

Bamboo Charcoal ◽

Methylene Blue Solution ◽

Initial Concentration ◽

Blue Solution ◽

Degradation Effect

In this paper, the photocatalytic degradation of methylene blue solution by photocatalysis bamboo charcoal fiber knitted fabric was studied. The relationships were analyzed between the photocatalytic degradation rate and the reaction time, the initial concentration, pH of methylene blue solution, and the distance between the UV light centre and liquid level. The results indicates that there is an remarkable photocatalytic degradation effect of methylene blue solution by photocatalysis bamboo charcoal fiber knitted fabric under UV-irradiation, even the degradation rate could reach to 67.02%. The degradation effect was better with lower initial concentration of methylene blue solution, higher initial pH，and the shorter distance between light centre and liquid level.

Download Full-text

Photocatalytic Degradation of Methylene Blue on MoS2/TiO2 Nanocomposite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.197-198.996 ◽

2011 ◽

Vol 197-198 ◽

pp. 996-999 ◽

Cited By ~ 5

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.

Download Full-text

Experimental study on single factor effect of divergent ultrasonic degradation of methylene blue in water

E3S Web of Conferences ◽

10.1051/e3sconf/201911803051 ◽

2019 ◽

Vol 118 ◽

pp. 03051

Author(s):

Yong-guang Bi ◽

Xin-ting Zhang ◽

Shao-qi Zhou

Keyword(s):

Methylene Blue ◽

Degradation Rate ◽

Ph Value ◽

Methylene Blue Solution ◽

Solution Ph ◽

Environmental Friendliness ◽

Initial Concentration ◽

Highly Active ◽

Blue Solution ◽

Ultrasonic Degradation

The study of divergent ultrasonic degradation of methylene blue in water was carried out by exploring the ultrasonic intensity of the methylene blue, the initial concentration and the degradation rate of the solution pH. The test results show that the degradation rate of methylene blue decreases with the increase of ultrasonic power.The initial concentration of methylene blue solution is in the range of 0.00-10.00 mg/L. The degradation rate of methylene blue increases as the concentration of the solution increases. when the concentration is greater than 10.00mg/L, the concentration increases, and the ultrasonic degradation rate decreases. When the pH value is higher, the degradation rate of the methylene blue solution increases with the increase of pH, and the degradation rate reaches a maximum of 77.89%. The region where the ultrasonic degradation of methylene blue occurs is mainly at the junction of gas-liquid two phases, and is degraded by forming hydrogen peroxide in the cavitation bubbles and decomposing into various highly active radicals. Ultrasound has the advantages of fast, low energy consumption and environmental friendliness.

Download Full-text

Technology of Modified Orange Peel Adsorption Treatment in Wastewater Containing Zinc

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.610-613.1540 ◽

2012 ◽

Vol 610-613 ◽

pp. 1540-1545

Author(s):

Rui Yu Jia ◽

You Hong Lin ◽

Wei Zhang

Keyword(s):

Adsorption Capacity ◽

Ph Value ◽

Orange Peel ◽

Sorption Process ◽

Optimal Conditions ◽

Adsorption Time ◽

Initial Concentration ◽

Ph Values ◽

Wide Range ◽

Adsorption Treatment

Using modified flavedo as the adsorbent , the sorption process of Zn2+Superscript text by modified flavedo in wastewater containing heavymetals was studied. The effects of various factors in Zn2+Superscript text adsorption , such as adsorbtion time , temperature , pH value , initial Zn2+ concentration , and pretreatment,were analyzed. The results showed that the pretreatment of modified raised adsorption capacity , and the adsorption capacity was suitable for wastewater with a wide range of pH values. The rate of removal of Zn2+Superscript text reached 98% when the Zn2+ initial concentration was under 100mg/L. The optimal conditions for Zn2 + adsorptionSuperscript text by Modified orange peel were a wastewater pH value of 5.5 , at 25 °C, an adsorption time of 60 minutes , and a dosage of modacrylic flavedo of 2 g/ L.

Download Full-text

Photocatalytic Degradation of Methylene Blue Solution by Fe-Doped Tio2 under Visible Light

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.807-809.526 ◽

2013 ◽

Vol 807-809 ◽

pp. 526-529

Author(s):

Wei Xing Li ◽

Jing Huan Ma ◽

Ying Liu ◽

Qing Tong Ren ◽

Zhan Sheng Ma

Keyword(s):

Methylene Blue ◽

Visible Light ◽

Photocatalytic Degradation ◽

Degradation Rate ◽

Raw Materials ◽

Catalytic Performance ◽

Impregnation Method ◽

Methylene Blue Solution ◽

Initial Concentration ◽

Blue Solution

In this paper, Fe (NO3) 3 9H2O and TiO2 were selected as raw materials. Fe2O3/TiO2 photocatalyst was prepared by the impregnation method. The degradation performance of the photocatalyst for methylene blue solution was studied in detail under the tungsten light source environment. The results showed that Fe2O3/TiO2 had the good photocatalytic properties, and that methylene blue had a higher degradation rate at about 60min. In a certain range of loading, degradation gradually increased with the amount of doped iron. The catalytic performance was high at the basic condition. The degradation rate decreased with the higher initial concentration of methylene blue. The photocatalyst with good performance has been prepared.

Download Full-text

SENG OKSIDA (ZnO) SEBAGAI FOTOKATALIS PADA PROSES DEGRADASI SENYAWA BIRU METILEN

Jurnal Riset Kimia ◽

10.25077/jrk.v1i2.72 ◽

2015 ◽

Vol 1 (2) ◽

pp. 179

Author(s):

Syukri Darajat ◽

Hermansyah Aziz ◽

Admin Alif

Keyword(s):

Methylene Blue ◽

Quantum Yield ◽

Photochemical Reaction ◽

Half Time ◽

Methylene Blue Solution ◽

Initial Concentration ◽

First Order ◽

Blue Solution ◽

The One ◽

Order Rule

ABSTRACT A research aimed to study the influence of ZnO white powder on photodegradation of methylene blue using Merkuri lamp (l = 365 nm) as light source have been reached. A suspension of ZnO (40 mg) mixed with 25 mL of methylene blue solution (initial concentration of 0.015 mM) then was illuminated for 60 minutes showed degradation and quantum yield amounting 23.84% and 3.55 molecules photon-1, respectively. These results mean that by using ZnO as photocatalyst there is about four times efficiency than the one without ZnO either in case of time consumed or the number of photon applied. In kinetic study, it has been observed that such semiconductor-catalyzed photochemical reaction obeys the first order rule where rate constant and half time consecutively were 0.0029 minute-1 and 231 minutes. Keywords : photodegradation, photocatalyst, quantum yield, semiconductor, photochemical reaction.

Download Full-text

Synthesis of Visible-Light Responsive CdS/ZnO Nanocomposite Photocatalysts via Simple Precipitation Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.608.224 ◽

2014 ◽

Vol 608 ◽

pp. 224-229 ◽

Cited By ~ 6

Author(s):

Potjanaporn Chaengchawi ◽

Karn Serivalsatit ◽

Pornapa Sujaridworakun

Keyword(s):

Methylene Blue ◽

Visible Light ◽

Photocatalytic Performance ◽

Precipitation Method ◽

Cds Nanoparticles ◽

Methylene Blue Solution ◽

X Ray Diffraction ◽

X Ray ◽

Blue Solution ◽

Scanning Electron

A visible-light responsive CdS/ZnO nanocomposite photocatalyst was successfully synthesized by precipitation of CdS nanoparticles, using Cd (NO3)2 and Na2S as starting materials, on ZnO nanoparticles and then calcined at 400°C for 2 hours. The effects of the mole ratio of CdS and ZnO in the composites on their phase, morphology, and surface area were investigated by X-ray Diffraction (XRD), scanning electron microscope (SEM), Brunauer Emmett Teller method (BET), respectively. The photocatalytic degradation of methylene blue solution in the presence of composite products under visible-light irradiation was investigated. The results showed that the mole ratio of CdS and ZnO played a significant role on photocatalytic performance. The highest photocatalytic activity was obtained from the CdS/ZnO nanocomposite with mole ratio of 1:4, which is higher than that of pure CdS and pure ZnO.

Download Full-text

Preparation and Photocatalytic Activity of TiO2/Opal Composite

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.668.13 ◽

2013 ◽

Vol 668 ◽

pp. 13-16

Author(s):

Qing Shan Li ◽

Biao Zhan ◽

Wei Hong ◽

Guang Zhong Xing

Keyword(s):

Methylene Blue ◽

Uv Light ◽

Sol Gel ◽

Tetrabutyl Titanate ◽

Methylene Blue Solution ◽

Photocatalytic Decolorization ◽

Uv Light Irradiation ◽

Photocatalytic Activities ◽

Blue Solution ◽

Gel Technique

Opal as a carrier, tetrabutyl titanate as a titanium source, TiO2 loaded on opal was prepared by sol-gel technique. The photocatalysts were characterized by XRD, TEM and UV-VIS absorption spectrum. Their photocatalytic activities were examined by the photocatalytic decolorization of methylene blue solution under UV light irradiation. The effects of calcination temperature, the amount of TiO2 loading and pH on photocatalytic activities were discussed. The results show that TiO2 supported on opal induced enhancement of photocatalytic decolorization rant and TiO2 doping is about 30 wt. % with 92.15% of decolorization rate at 700°C.

Download Full-text