scholarly journals Solution Plasma-Assisted Green Synthesis of MnO2 Adsorbent and Removal of Cationic Pollutant

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Hye-min Kim ◽  
Nagahiro Saito ◽  
Dae-wook Kim
Keyword(s):  
Methylene Blue ◽  
Green Synthesis ◽  
Dye Removal ◽  
Synthesis Method ◽  
Structural Features ◽  
Environmentally Benign ◽  
Cationic Dye ◽  
Removal Mechanism ◽  
Initial Concentration ◽  
Benign Synthesis

In this study, we proposed the solution plasma- (SP-) assisted green synthesis method using plants extracts, i.e., glucose, with the expectation of acting as a reducing agent and promotor for the formation of powder state of nanostructured MnO2. MnO2 was simply and rapidly synthesized within 10 min by the SP-assisted method. The structural features and morphology of as-synthesized MnO2 were characterized by XRD, Raman, FE-SEM, and TEM analyses. For potential application of as-synthesized MnO2, cationic dye, i.e., methylene blue (MB), removal performance was investigated by batch experiment at an initial concentration of C0 = 100 mg L−1. The obtained MnO2 exhibited effective dye removal ability given high C0, and simultaneously applied plasma discharging further enhanced removal efficiency. These contributions therefore open a new window not only on a powerful and environmentally benign synthesis route for efficient adsorbents but also on supporting multiple removal mechanism.

scholarly journals Magnetic graphene oxide-nano zero valent iron (GO–nZVI) nanohybrids synthesized using biocompatible cross-linkers for methylene blue removal

RSC Advances ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 963-973 ◽  
Author(s):  
Novin Mehrabi ◽  
Arvid Masud ◽  
Moyosore Afolabi ◽  
Jinwoo Hwang ◽  
Gabriel A. Calderon Ortiz ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Zero Valent Iron ◽  
Adsorption Efficiency ◽  
High Adsorption ◽  
Magnetic Graphene Oxide ◽  
Methylene Blue Removal ◽  
Nano Zero Valent Iron

A green synthesis method was used to prepare GO–nZVI nanohybrids to provide an adsorbent with high adsorption efficiency that can be removed from aqueous solutions easily by magnetic separation.

scholarly journals Cellulose Hydrogels for Rapid Dye Removal from Water

2020 ◽  
Author(s):  
Justin Harris ◽  
Anne McNeil
Keyword(s):  
Methylene Blue ◽  
Dye Removal ◽  
Cellulose Nanofibers ◽  
Water Sources ◽  
Water Remediation ◽  
Clean Water ◽  
Cationic Dye ◽  
Gel Formation ◽  
Potential Solution ◽  
Wood Pulps

<div><p>Clean water has become increasingly difficult to access due to the environmental discharge of pollutants. One potential solution is to develop materials that can efficiently remove pollutants from water sources through adsorption. Hydrogels have been explored for water remediation, but they often require long times to reach high levels of adsorption. To overcome this limitation, we developed a quick and locally formed hydrogel that adsorbs a common cationic dye during gel formation. Specifically, we demonstrate that hydrogels derived from cellulose – a renewable, non-toxic, and biodegradable resource – can efficiently remove methylene blue from water within seconds. We found that both sulfated cellulose nanofibers and sulfated wood pulps form localized gels when mixed with solutions containing a soluble, cationic cellulose derivative and the cationic dye. Overall, these localized hydrogels may be promising materials for remediating other water pollutants with further functionalization.</p></div>

Removal mechanism of cationic dye (Safranin O) from the aqueous phase by dead macro fungus biosorbent

2013 ◽  
Vol 68 (5) ◽  
pp. 1048-1054 ◽  
Author(s):  
N. S. Maurya ◽  
A. K. Mittal
Keyword(s):  
Ion Exchange ◽  
Aqueous Phase ◽  
Dye Removal ◽  
Mineral Acid ◽  
Common Salt ◽  
Order Kinetic ◽  
Cationic Dye ◽  
Removal Mechanism ◽  
Sorption Mechanism ◽  
Safranin O

Batch biosorption parametric experiments were carried out to delineate the removal mechanism of cationic dye, namely, Safranin O, from the aqueous phase using biosorbent prepared from wood rotting dead macro fungus ’Fomitopsis carnea‘. Experimental data of the kinetic experiments at various temperatures (19, 27 and 35 °C) were well described using pseudo-second order kinetic models. Raising temperature from 19 to 35 °C enhanced the dye uptake potential of the biosorbent from 1,000 to 1,250 mg/g. The other variables studied were the effect of common salt (NaCl) and pH on the dye removal potential of the biosorbent. Decreased dye removal (%) efficiency at higher salt concentration suggests involvement of an ion-exchange type sorption mechanism. The pH study revealed that dye removal may occur due to the existence of an electrostatic attraction force between negatively charged biosorbent particles and dye cation. However desorption using mineral acid (H2SO4 and HCl) exhibited the highest desorption up to 76%, followed by organic acid (52%) and distilled water (not more than 2%) indicating the possibility of ion-exchange as the dominating dye sorption mechanism. Fourier transform infrared (FT–IR) spectroscopy analysis of the biosorbent, Safranin O and Safranin O loaded biosorbent also supported the possibility of ion-exchange as the dominating mechanism due to the presence of major peaks of Safranin O on the IR spectra of Safranin O loaded biosorbent, indicating that the Safranin O was present in its unaltered form on the surface of the biosorbent.

Recent Advances in the Green Synthesis of Heterocycles: From Building Blocks to Biologically Active Compounds

2021 ◽  
Vol 18 ◽  
Author(s):  
Christian Schäfer ◽  
Hyejin Cho ◽  
Bernadett Vlocskó ◽  
Guoshu Xie ◽  
Béla Török
Keyword(s):  
Green Synthesis ◽  
Building Blocks ◽  
Biologically Active Compounds ◽  
Biologically Active ◽  
Environmentally Benign ◽  
Active Compounds ◽  
Aromatic Heterocycles ◽  
High Interest ◽  
Recent Advances ◽  
Benign Synthesis

: Recent advances in the environmentally benign synthesis of common heterocycles are described. This account features three main parts; the preparation of non-aromatic heterocycles, one-ring aromatic heterocycles and their condensed analogs. Due to the great variety of and high interest in these compounds, this work focuses on providing representative examples of the preparation of the target compounds.

Effect of synthesis method of LaNiO3 type materials with perovskite structure on their features and in the methylene blue dye removal from aqueous media

2021 ◽  
Vol 16 (12) ◽  
Author(s):  
Joenesson Fílip Santos Ribeiro ◽  
Andreza Alves Souza ◽  
Elaine Cristina Nogueira Lopes Lima ◽  
Marcelo José Barros Souza ◽  
Anne Michelle Garrido Pedrosa
Keyword(s):  
Methylene Blue ◽  
Perovskite Structure ◽  
Dye Removal ◽  
Aqueous Media ◽  
Synthesis Method ◽  
Blue Dye ◽  
Methylene Blue Dye

Óxidos com estrutura perovskita são alvo de importantes estudos, pois são materiais versáteis que apresentam aplicações magnéticas, elétricas, ópticas, catalíticas, adsortivas, entre outras, e também são facilmente sintetizados. Essas aplicações são potencialmente influenciadas pelo método de síntese e, nesse sentido, diversos métodos têm sido utilizados na preparação desses materiais, a fim de otimizar suas características e propriedades. No presente trabalho, materiais do tipo LaNiO3 com estrutura perovskita foram preparados a partir dos seguintes métodos: proteíco modificada usando gelatina como agente complexante, mecanossíntese e método de combustão em placa de aquecimento e microondas. Os materiais obtidos foram caracterizados por técnicas físico-químicas e avaliados como adsorventes para a remoção do corante azul de metileno em meio aquoso. Todos os materiais apresentaram potencial de remoção do corante do meio, com destaque para o material obtido por mecanossíntese, que apresentou maior eficiência de descoloração do corante. Após os testes de remoção do corante, a estrutura da perovskita foi preservada e o adsorvente foi reutilizado após ser submetido à calcinação a 900 °C quando ocorreu a degradação simultânea do corante previamente adsorvido. Os materiais reaproveitados ainda apresentavam alto potencial de remoção de corantes.

scholarly journals Cellulose Hydrogels for Rapid Dye Removal from Water

2020 ◽  
Author(s):  
Justin Harris ◽  
Anne McNeil
Keyword(s):  
Methylene Blue ◽  
Dye Removal ◽  
Cellulose Nanofibers ◽  
Water Sources ◽  
Water Remediation ◽  
Clean Water ◽  
Cationic Dye ◽  
Gel Formation ◽  
Potential Solution ◽  
Wood Pulps

<div><p>Clean water has become increasingly difficult to access due to the environmental discharge of pollutants. One potential solution is to develop materials that can efficiently remove pollutants from water sources through adsorption. Hydrogels have been explored for water remediation, but they often require long times to reach high levels of adsorption. To overcome this limitation, we developed a quick and locally formed hydrogel that adsorbs a common cationic dye during gel formation. Specifically, we demonstrate that hydrogels derived from cellulose – a renewable, non-toxic, and biodegradable resource – can efficiently remove methylene blue from water within seconds. We found that both sulfated cellulose nanofibers and sulfated wood pulps form localized gels when mixed with solutions containing a soluble, cationic cellulose derivative and the cationic dye. Overall, these localized hydrogels may be promising materials for remediating other water pollutants with further functionalization.</p></div>

scholarly journals Comparative Antimicrobial Activity of Silver Nanoparticles Synthesized by Corynebacterium glutamicum and Plant Extracts

2019 ◽  
Vol 16 (3(Suppl.)) ◽  
pp. 0689
Author(s):  
Mohammad Et al.
Keyword(s):  
Antimicrobial Activity ◽  
Green Synthesis ◽  
Corynebacterium Glutamicum ◽  
Plant Extracts ◽  
Spinacia Oleracea ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Physical Method ◽  
Environmentally Benign ◽  
Ag Nps

           Biosynthesis of nanoparticles has received considerable attention due to the growing need to develop environmentally benign nanoparticle synthesis processes that do not use toxic chemicals. Therefore, biosynthetic methods employing both biological agents such as bacteria and fungus or plant extracts have emerged as a simple and a viable alternative to chemical synthetic and physical method .It is well known that many microbes produce an organic material either intracellular or extracellular which is playing important role in the remediation of toxic metals through reduction of metal ions and acting as interesting Nano factories. As a result, in the present study Ag NPs were synthesized by two methods biosynthetic technique using supernatant of Corynebacterium glutamicum that isolated from soil and green synthesis method by using plant extracts of fresh green plants.Ag NPs which synthesized by two methods were investigated visually by monitoring the color shift of reaction mixture from pale yellow to brown color, UV-Visible spectrophotometer was used to measure maximum absorbance of synthesized Ag NPs. The nanoparticles synthesized from Corynebacterium glutamicum exhibited maximum antimicrobial activity against selected pathogenic and environmental strains more than Ag NPs synthesized by green synthesis method from Spinacia oleracea, Malva parviflora and Eruca sativa. plant extracts

scholarly journals Cationic Dye Removal By Sugarcane Bagasse Activated Carbon From Aqueous Solution

2015 ◽  
Vol 17 (4) ◽  
pp. 784-795 ◽  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Dye Removal ◽  
Adsorption Process ◽  
Low Cost ◽  
Second Order ◽  
Cationic Dye ◽  
Pseudo Second Order

<div> <p>Low cost agricultural waste adsorbents can be viable alternatives to activated carbon for the treatment of contaminated wastewater. Sugarcane Bagasse, an abundant agriculture waste in Egypt, was used in the present study to prepare activated carbon. Batch adsorption experiments were conducted to study its effectiveness to remove cationic dye methylene blue from aqueous solution. The effects of initial dye concentrations, agitation time, solution pH and temperature on methylene blue dye removal were investigated. The optimum pH value for the maximum percentage removal of the dye was 7. Adsorption isotherms were determined and modeled with Redlich&ndash;Peterson, Langmuir and Freundlich equations at 20&ordm;C.The kinetic data were analyzed using Pseudo-first order, pseudo-second order. The mechanism of the adsorption process was determined from the intraparticle diffusion model. Thermodynamic parameters such as standard enthalpy (ΔH&deg;), standard entropy (ΔS&deg;) and free energy (ΔG&deg;) were determined.&nbsp; The equilibrium data were best fitted to the Redlich&ndash;Peterson isotherm model .The adsorption kinetics was found to follow the pseudo-second-order kinetic model with good correlation coefficient. The positive ΔH<sup>◦</sup> value indicated that the adsorption process was endothermic in nature. The results revealed sugarcane bagasse activated carboncould be employed as a low-cost alternative adsorbent in wastewater treatment.&nbsp;</p> </div> <p>&nbsp;</p>

Sign in / Sign up

Export Citation Format

Share Document