Electrospinning preparation of NiO/ZnO composite nanofibers for photodegradation of binary mixture of rhodamine B and methylene blue in aqueous solution: Central composite optimization

2018 ◽  
Vol 32 (6) ◽  
pp. e4335 ◽  
Author(s):  
Mohammad Mehdi Sabzehmeidani ◽  
Hajir Karimi ◽  
Mehrorang Ghaedi
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Binary Mixture ◽  
Rhodamine B ◽  
Composite Nanofibers ◽  
Composite Optimization ◽  
Central Composite

Highly efficient simultaneous ultrasonic-assisted adsorption of methylene blue and rhodamine B onto metal organic framework MIL-68(Al): central composite design optimization

RSC Advances ◽  
2016 ◽  
Vol 6 (33) ◽  
pp. 27416-27425 ◽  
Author(s):  
Mahnaz Saghanejhad Tehrani ◽  
Rouholah Zare-Dorabei
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Rhodamine B ◽  
Low Cost ◽  
Metal Organic Framework ◽  
Simultaneous Removal ◽  
Ultrasonic Assisted ◽  
Metal Organic ◽  
Central Composite ◽  
Organic Framework

In this work, metal organic framework (MIL-68(Al)), was synthesized by a simple, fast and low-cost process for simultaneous removal of methylene blue and Rhodamine B, regarded to be toxic and even carcinogenic, from aqueous solution.

scholarly journals Studies on Synthesis, Characterization, and Adsorption of Cationic Dyes from Aqueous Solutions Using Magnetic Composite Material from Natural Clay in Central Kalimantan, Indonesia

Molekul ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. 63
Author(s):  
I Made Sadiana ◽  
Karelius Karelius ◽  
Retno Agnestisia ◽  
Abdul Hadjranul Fatah
Keyword(s):  
Magnetic Material ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Composite Material ◽  
Rhodamine B ◽  
Solid Phase ◽  
Magnetic Composite ◽  
Natural Clay ◽  
Central Kalimantan ◽  
Adsorption Capacities

Clay is a natural material from crystalline silicate with layered structures, has high cation exchange capacity, and large surface area. These advantages can be used as an adsorbent for the removal of contaminants in aqueous solutions, such as heavy metals and dyes. In Indonesia, clays from Java, Sulawesi, and Sumatra islands have been used as adsorbent, furniture, and construction materials. Due to limited information about basic characteristics of clay from Kalimantan, this clay has not been utilized well. Therefore, natural clay from Kalimantan, especially in Central Kalimantan, was used as adsorbent of cationic dyes in this present study. However, the clay has difficulty for separating the solid phase from aqueous solution after adsorption process. To solve this problem, combining clay with magnetic material was opted. The objectives of this study are to synthesize the magnetic composite material from natural clay by coprecipitation method and to characterize the synthesized magnetic composite material using an x-ray diffraction method, transmission electron microscopy, and vibrating sample magnetometer. The adsorption properties of the synthesized magnetic composite material were evaluated using rhodamine B and methylene blue dyes in aqueous solution. Before magnetic composite material was synthesized, the clay was previously being activated for removing impurities. The magnetic material formed in the structure of clay had magnetite with particle size of 2.75 nm and the magnetization value of 24.91emu/g. The adsorption capacities of natural clay, activated clay, and magnetic composite of clay in rhodamine B were 34.29, 76.27, and 81.46 mg/g, respectively, while in methylene blue were 30.25, 83.92, and 133.90 mg/g, respectively. These results suggested that magnetic composite of clay can increase the adsorption capacities against dyes and accelerate the separation of the adsorbent solid phase from aqueous solution with largest adsorption capacity on methylene blue dye.

Application of Response Surface Methodology for Optimization of Methylene Blue Removal by Casuarina equitifolia Leaves Powder

2015 ◽  
Vol 1113 ◽  
pp. 745-750
Author(s):  
Norzila Mohd ◽  
Wan Hasnidah Wan Osman ◽  
Mohd Shahrul Nizam Salleh ◽  
Sarifah Fauziah Syed Draman ◽  
Nurul Syahirah Abd Kahar ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Adsorption Process ◽  
Coefficient Of Determination ◽  
Human Beings ◽  
Adsorbent Dosage ◽  
Mutagenic Effects ◽  
Central Composite

Dye is a type of colorants that are widely used in many industries. Many dyes are toxic in nature with suspected carcinogenic and mutagenic effects that affect aquatic lives and also human beings. Adsorption process is considered as eco-friendly method to remove color from the aqueous solution compared to other established method. In this study, Casuarina Equitifolia leaves were used as an adsorbent. The Response surface methodology (RSM) was employed, using a central composite design (CCD) to optimize the three important variables, i.e., initial dye concentration, pH of the dye solution and adsorbent dosage in order to remove of methylene blue from aqueous solution. From the analysis of variance (ANOVA), the value (>0.8) of the coefficient of determination (R2) was obtained. The optimal condition was established at pH 6.91, 0.1 g adsorbent dosage and 10ppm initial methylene blue concentration. The removal efficiency was found to be 98.80%. From the findings, it shows that Casuarina Equitifolia leaves powder is suitable to be used as an adsorbent in removal of color from aqueous solution.

REMOVAL OF CATIONIC DYES FROM AQUEOUS SOLUTION USING CARBON-ENCAPSULATED SUPERPARAMAGNETIC COLLOIDAL NANOPARTICLES AS ADSORBENT

NANO ◽  
2013 ◽  
Vol 08 (01) ◽  
pp. 1350006 ◽  
Author(s):  
HUI WANG ◽  
XUHUI ZHOU ◽  
QIANWANG CHEN
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Rhodamine B ◽  
Negative Charge ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Colloidal Nanoparticles ◽  
Ph Values

This paper demonstrates the application of negative charge-functionalized carbon-encapsulated superparamagnetic colloidal nanoparticles being as nanoadsorbents for the removal of cationic dyes from aqueous solutions. Adsorption characteristics of the magnetic nanoadsorbents were examined using methylene blue as adsorbates, exhibiting excellent ability to remove cationic dyes from aqueous solutions. In addition, the influences of uptake time, concentration of nanoadsorbents and pH values of aqueous solution on the removal of cationic dyes have been discussed. Results show that the removal efficiency can be up to 90% at a dye concentration of 100 mg L-1 when the uptake time is 1 min, which indicates rapidly removal ability of the magnetic nanoadsorbents. Furthermore, other cationic dyes including rhodamine B and methyl violet were used to examine the universality of nanoadsorbents.

scholarly journals Removal of Methylene Blue, Rhodamine B and Ammonium Ion from Aqueous Solution by Adsorption onto Sintering Porous Materials Prepared from Coconut Husk Waste

2015 ◽  
Vol 05 (02) ◽  
pp. 21-30 ◽  
Author(s):  
Ahmed H. A. Dabwan ◽  
Nakane Yuki ◽  
Nur Amni Mohd Asri ◽  
Hideyuki Katsumata ◽  
Tohru Suzuki ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Porous Materials ◽  
Rhodamine B ◽  
Ammonium Ion ◽  
Coconut Husk

Lotus seedpod as a low-cost biomass for potential methylene blue adsorption

2016 ◽  
Vol 74 (11) ◽  
pp. 2560-2568 ◽  
Author(s):  
Qiulai He ◽  
Hongyu Wang ◽  
Jing Zhang ◽  
Zhuocheng Zou ◽  
Jun Zhou ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Solution Ph ◽  
Monolayer Adsorption ◽  
Pseudo Second Order ◽  
Central Composite ◽  
Lotus Seedpod

The adsorption of methylene blue (MB) by low cost biomass lotus seedpod (LSP) was optimized by a central composite design combined with response surface methodology in aqueous solution. Solution pH, initial dye concentration and adsorbent dosage were studied as independent variables at five levels each, respectively. Analysis of variance suggested the validity of the regression model. LSP was characterized by Fourier transform infrared spectra and energy dispersive spectroscopy. The kinetics revealed that the adsorption behavior followed the pseudo-second-order model. Langmuir and Freundlich isotherm models were used to evaluate the adsorption, and the experimental data were better fitted by the Langmuir isotherm than the Freundlich isotherm. The maximum monolayer adsorption capacity of the LSP was 157.98 mg g−1 at 30 °C for MB adsorption. In addition, 0.2 M HCl solution could be used for reusability of LSP via desorption tests. LSP was proven to be an available and effective biosorbent for MB removal from aqueous solution.

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