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 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.

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 ◽  
pp. 240-246
Author(s):  
Kaur Harpreet ◽  
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.

scholarly journals Effective Magnetic MOFs Adsorbent for the Removal of Bisphenol A, Tetracycline, Congo Red and Methylene Blue Pollutions

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1917
Author(s):  
Guangpu Zhang ◽  
Rong Wo ◽  
Zhe Sun ◽  
Gazi Hao ◽  
Guigao Liu ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Electron Microscope ◽  
Bisphenol A ◽  
Congo Red ◽  
Reduction Process ◽  
Entropy Change ◽  
Potential Candidate ◽  
Order Kinetic ◽  
Adsorption Processes ◽  
Infrared Spectrometer

A magnetic metal−organic frameworks adsorbent (Fe3O4@MIL-53(Al)) was prepared by a typical solvothermal method for the removal of bisphenol A (BPA), tetracycline (TC), congo red (CR), and methylene blue (MB). The prepared Fe3O4@MIL-53(Al) composite adsorbent was well characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and fourier transform infrared spectrometer (FTIR). The influence of adsorbent quantity, adsorption time, pH and ionic strength on the adsorption of the mentioned pollutants were also studied by a UV/Vis spectrophotometer. The adsorption capacities were found to be 160.9 mg/g for BPA, 47.8 mg/g for TC, 234.4 mg/g for CR, 70.8 mg/g for MB, respectively, which is superior to the other reported adsorbents. The adsorption of BPA, TC, and CR were well-fitted by the Langmuir adsorption isotherm model, while MB followed the Freundlich model, while the adsorption kinetics data of all pollutants followed the pseudo-second-order kinetic models. The thermodynamic values, including the enthalpy change (ΔH°), the Gibbs free energy change (ΔG°), and entropy change (ΔS°), showed that the adsorption processes were spontaneous and exothermic entropy-reduction process for BPA, but spontaneous and endothermic entropy-increasing processes for the others. The Fe3O4@MIL-53(Al) was also found to be easily separated after external magnetic field, can be a potential candidate for future water treatment.

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