scholarly journals Biosynthesis, Anti-TB Activity and Degradation of Dyes by Silver Nanoparticles using Fruits Peels

2019 ◽  
Vol 31 (10) ◽  
pp. 2397-2402
Author(s):  
Harpreet Kaur ◽  
Abhinav Sharma
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Malachite Green ◽  
Crystal Violet ◽  
Congo Red ◽  
Antitubercular Activity ◽  
Environmentally Benign ◽  
Degradation Of Dyes ◽  
Subsequent Stabilization ◽  
Mic Value

In the present work, waste materials such as pomegranate and orange peels were taken to synthesize nanoparticles by biological method. The method did not involve the use of toxic reducing and capping agents. It uses only the environmentally benign biomolecules for reduction of AgNO3 and subsequent stabilization of silver nanoparticles. The size of pomegranate and orange silver nanoparticles varied from 8-25 nm with nearly spherical morphology as analyzed by XRD and TEM studies. The synthesized nanoparticles were studied for their dye degrading property. Different dyes such as crystal violet, methylene blue, malachite green and Congo red were taken for the study. The results indicated the presence of two diverse mechanism of dye removal. Crystal violet, methylene blue, malachite green was removed by adsorption onto both the nanoparticles, whereas Congo red was reduced by NaBH4 in the presence of catalytic pomegranate silver nanoparticles. Moreover, pomegranate silver nanoparticles have exhibited potent antitubercular activity with MIC value of 6.25 μg/mL and orange silver nanoparticles are moderately active with MIC value of 25 μg/mL. It could be concluded that the pomegranate silver nanoparticles would a promising candidate for drug development and catalysis.

scholarly journals Bioremediation of organic dyes using combination of plants ash

2019 ◽  
Vol 7 (2) ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
Kaur Harpreet ◽  
Vandana Kamboj ◽  
Vandana Kamboj
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Methyl Orange ◽  
Crystal Violet ◽  
Congo Red ◽  
Organic Dyes ◽  
Low Cost ◽  
Sem Image ◽  
Orange Peels

Water is the most crucial thing to mankind and so its contamination by various agencies is posing a threat to the natural balance. So, in the present work, the efficiency of various adsorbents derived from plant waste, to remove different dyes from aqueous solution was evaluated. Parameters for study were contact time, concentration and pH. Various combinations of plant ashes were used for the study. It was found that adsorbent prepared from the combination of orange peels, pomegranate and banana peels ashes, exhibited good adsorption capacity for methylene blue, congo red and crystal violet. All these dyes were completely removed from the aqueous solution while methyl orange was not removed. Congo red was removed completely within 40 min of contact with the adsorbent while methyl orange took 3 hrs to be removed to the extent of 48% only. The adsorption coefficient of congo red was found to be 2.33 while value for methylene blue and crystal violet was 1 and 1.66 respectively. The characterization of adsorbent was done by Scanning Electron Microscopy and IR spectroscopy. SEM image revealed the surface of adsorbent to be made of differential pores. From the results it became evident that the low-cost adsorbent could be used as a replacement for costly traditional methods of removing colorants from water.

Determination of malachite green, crystal violet, brilliant green and methylene blue by micro-cloud-point extraction and nonlinear laser wave-mixing detection interfaced to micellar capillary electrophoresis

2017 ◽  
Vol 9 (45) ◽  
pp. 6411-6419 ◽  
Author(s):  
Jean Sebastien Pradel ◽  
William G. Tong
Keyword(s):  
Methylene Blue ◽  
Capillary Electrophoresis ◽  
Malachite Green ◽  
Crystal Violet ◽  
Brilliant Green ◽  
Cloud Point Extraction ◽  
Detection Method ◽  
Wave Mixing ◽  
Laser Wave

A laser wave-mixing CE detection method is reported for separation and detection of malachite green (MG), crystal violet (CV), brilliant green (BG), methylene blue (MB), and the leuco-metabolites of MG and CV residues in aquacultures.

scholarly journals Photocatalytic Degradation of Dyes by TiO2 Process in Batch Photoreactor

2020 ◽  
Vol 9 (4) ◽  
pp. 1502-1512
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Congo Red ◽  
Degradation Rate ◽  
Light Sources ◽  
Chemical Contamination ◽  
Degradation Of Dyes ◽  
Effective Option ◽  
Set Up

Chemical contamination in water caused by pollutants is becoming a severe environmental problem. The combination of photocatalysis and solar technologies are a valuable method for water pollution reduction caused by dyeing composites. Therefore, this study aims to determine the effects of operating parameters on the dyes photocatalytic degradation using titanium dioxide (TiO2)-based photocatalyst. Different types of dyes were used in this study, such as methylene blue, congo red, and methyl orange. The different weights of TiO2 were mixed respectively in 500 ml of 10 mg/L dye solutions, which was set up in the photoreactor priorly. Later, the sample extractions were carried and analyzed using a UV-Vis spectrophotometer. The dye removal efficiency was investigated by changing conditions (catalyst dosage, light sources, and aeration). The results showed methylene blue photocatalytic degradation was best with 0.0547 min-1 degradation rate at conditions of 3.0 g/L of TiO2, presence of UVC lamp, and aeration. Congo red photocatalytic degradation was best with 0.0254 min-1 degradation rate at conditions of 1.0 g/L of TiO2, presence of sunlight, and aeration. Methyl orange photocatalytic degradation was best with 0.0094 min-1 degradation rate using 1g/L of TiO2, presence of UVC lamp, and aeration. These findings can be used as an effective option in industrial wastewater treatment.

scholarly journals Silver nanoparticles loaded on activated carbon as a novels adsorbent for the competitive removal of Malachite green and Methylene blue

2015 ◽  
Vol 9 (2) ◽  
pp. 75-92 ◽  
Author(s):  
Maryam Tavakol ◽  
Parviz Aberoomand Azar ◽  
Mohammad Saber Tehrani ◽  
Mehrorang Ghaedi
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Activated Carbon ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Morphological Properties ◽  
Hydroxyl Group ◽  
Batch Mode ◽  
Initial Ph ◽  
Equilibrium Data

In this study silver  nanoparticles by hydroxyl group (AgOH-NP) were synthesized and loaded on activated carbon prepared from Rosa canina tree (AgOH-NP-AC-RC). This new adsorbent was used for the removal of Malachite green and Methylene blue from aqueous medium.The morphological properties of the novel adsorbent were investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and FT-IR analysis. The removal both dyes in batch mode was investigated at various operating parameters like; contact time, initial pH, initial dye concentration and amount of adsorbents. The experimental equilibrium data were analyzed by using various models and it was seen that Freundlich isotherm model fitted well with adsorbtion capacity of 105 mg.g-1for Malachite green and 81.43 mg.g-1 for Methylene blue. The adsorption kinetic data followed pseudo second-order kinetics for removal both dyes.DOI: http://dx.doi.org/10.3126/ijls.v9i2.12053 International Journal of Life Sciences 9 (2) : 2015; 75-92

Adsorption of methylene blue, crystal violet and congo red from binary and ternary systems with natural clay: Kinetic, isotherm, and thermodynamic

2017 ◽  
Vol 5 (6) ◽  
pp. 5921-5932 ◽  
Author(s):  
Safae Bentahar ◽  
Abdellah Dbik ◽  
Mohammed El Khomri ◽  
Noureddine El Messaoudi ◽  
Abdellah Lacherai
Keyword(s):  
Methylene Blue ◽  
Crystal Violet ◽  
Congo Red ◽  
Ternary Systems ◽  
Natural Clay ◽  
Binary And Ternary Systems

scholarly journals Studies on Lignin Degradation Activity by Pseudomonas aeruginosa Isolated from Kware Lake

2021 ◽  
pp. 36-45
Author(s):  
Muhammad Hizbullahi Usman ◽  
Aliyu Ibrahim Dabai
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Biomass Production ◽  
Incubation Time ◽  
Congo Red ◽  
Lignin Degradation ◽  
Growth Parameters ◽  
Bacterial Biomass ◽  
Raw Material ◽  
Huge Amount

Background: Wood is naturally degraded by wood degrading microorganisms and modified and partly degraded residual of lignin goes into soil. It is an amorphous and complex aromatic compound. In the plant cells, lignin can be converted via phenylalanine and tyrosine by transamination. Africa generates a huge amount of waste from agricultural and household activities. This huge amount of waste can be exploited as a sustainable raw material for many industrial processes other than just simply burning it as a solid fuel. Aims: The study aimed at isolating and screening Pseudomonas aeruginoas for lignin degradation. Methods: The bacterium was characterized and identified according to morphological and biochemical characteristics. The bacterial DNA was extracted using DNA isolation kit and used for molecular analysis. Four (4) dyes such as Methylene blue, Congo red, iodine and Malachite green were screened on bacterial isolate for its ability to decolorize the dyes. The effect of some growth parameters such incubation time, temperature, pH and agitation were studies on the isolate for lignin degradation as well as bacterial biomass production.   Results: The effect of some growth parameters such incubation time, temperature, pH and agitation were studies on the isolate for lignin degradation as well as bacterial biomass production. From the results, it was observed that the isolate showed higher zone of inhibition on Congo red (14.00 mm) and Methylene blue (10.00 mm), while no decolorization was observed on Malachite green. The growth parameters studied indicated the optimum condition required for both lignin degradation and bacterial biomass production as follows; 48 hours (65%, 0.41g), 40oC (77%, 0.31g), pH 7 (58%, 0.26g) and 100rpm (72%, 0.42). The FTIR revealed two peaks at 3375 cm-1 which attributed to O-H stretching while the second peak 1687.5 cm-1 corresponded to C=O stretching. Conclusion: The results of GC-MS detected the presence of 2,5-Hexanediol, 2-Octynoic acid, n-Hexadecanoic acid and i-Propyl9,12-octadecenadienoate.

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