Relative Dye Adsorption Method for Determining the Hydrophobicity of Nanoparticles

2021 ◽  
Author(s):  
Guangle Li ◽  
Kacie K. H. Y. Ho ◽  
Yi Y. Zuo
Keyword(s):  
Dye Adsorption ◽  
Adsorption Method

Dye adsorption revisited: Application of the cationic dye adsorption method for the quantitative determination of the acidic surface groups of nanocellulose materials

2021 ◽  
Author(s):  
Jun Araki
Keyword(s):  
Dye Adsorption ◽  
Carboxyl Groups ◽  
Cationic Dye ◽  
Cellulose Nanowhiskers ◽  
Adsorption Method ◽  
Short Period ◽  
Light Absorbance ◽  
Mercapto Groups ◽  
Rapid Treatment

Abstract The surface carboxyl and sulfate groups on cellulose nanowhiskers were quantified via the adsorption of toluidine blue O (TBO), a cationic dye. Here, simple and rapid protocols, such as mixing the nanowhisker suspensions with a dye solution, separating the supernatants via centrifugation, and determining the excess dye concentration via visible light absorbance techniques, were used to obtain reproducible results comparable with those obtained via titration. In addition to facilitating the discrete quantification of the sulfate and carboxyl groups, the TBO adsorption method enabled carboxyl quantification in the presence of mercapto groups, which was difficult to achieve via titration. The adsorption of TBO onto the carboxyl groups was completed within 30 min, enabling the rapid treatment of many samples within a short period.

Adsorption and photocatalytic degradation of malachite green by vanadium doped zinc oxide nanoparticles

2015 ◽  
Vol 73 (4) ◽  
pp. 881-889 ◽  
Author(s):  
L. Khezami ◽  
Kamal K. Taha ◽  
Imed Ghiloufi ◽  
Lassaad El Mir
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Degradation ◽  
Malachite Green ◽  
Dye Adsorption ◽  
Nitrogen Adsorption ◽  
Order Kinetic ◽  
Adsorption Method ◽  
First Order ◽  
Degradation Data ◽  
Pseudo First Order

Herein the degradation of malachite green (MG) dye from aqueous medium by vanadium doped zinc oxide (ZnO:V3%) nanopowder was investigated. The specific surface area and pore volume of the nanopowder was characterized by nitrogen adsorption method. Batch experimental procedures were conducted to investigate the adsorption and photocatalytic degradation of MG dye. Adsorption kinetics investigations were performed by varying the amount of the catalyst and the initial dye concentrations. Adsorption and photocatalytic degradation data were modeled using the Lagergren pseudo-first-order and second-order kinetic equation. The results showed that the ZnO:V3% nanopowder was particularly effective for the removal of MG and data were found to comply with Lagergreen pseudo-first-order kinetic model.

The enhancement of dye adsorption in dye-sensitized solar module by an electrical adsorption method

2014 ◽  
Vol 554 ◽  
pp. 118-121 ◽  
Author(s):  
Hyunwoong Seo ◽  
Min-Kyu Son ◽  
Hee-Je Kim ◽  
Masaharu Shiratani
Keyword(s):  
Dye Adsorption ◽  
Adsorption Method ◽  
Solar Module ◽  
Dye Sensitized ◽  
Electrical Adsorption

scholarly journals NEW DYE ADSORPTION METHOD FOR DYE-SENSITIZED SOLAR CELL UTILIZING ELECTROSTATIC INKJET

2013 ◽  
Vol 25 (3+4) ◽  
pp. 25-30
Author(s):  
Shigeto KAWATA ◽  
Masafumi OGAWA ◽  
Shinjiro UMEZU ◽  
Yoshihito KUNUGI ◽  
Hitoshi OHMORI
Keyword(s):  
Solar Cell ◽  
Dye Adsorption ◽  
Dye Sensitized Solar Cell ◽  
Adsorption Method ◽  
Dye Sensitized

scholarly journals Swelling Behaviour of Starch-g-Acrylic Acid Hydrogel and its Potential Application in Removal of Rhodamine B and Alkali Blue Dyes

2021 ◽  
Vol 18 (2) ◽  
pp. 98-104
Author(s):  
S. Yahaya ◽  
Z.I.S.G. Adiya ◽  
S. S. Adamu ◽  
H.B. Bature ◽  
I.B. Ibrahim
Keyword(s):  
Ir Spectroscopy ◽  
Acrylic Acid ◽  
Rhodamine B ◽  
Dye Adsorption ◽  
Batch Adsorption ◽  
Scanning Calorimetry ◽  
Adsorption Method ◽  
Ft Ir ◽  
Percentage Removal ◽  
Ft Ir Spectroscopy

Starch-g-acrylic acid hydrogel was prepared by free radical polymerization technique adopting potassium persulphate (KPS) as an initiator and N’N-methylenebisacrylamide (MBA) as a linking agent. The aim of the research is to inspect the potentials of starch-based hydrogel in remediating wastewater. Fourier Transform Infrared (FT-IR) spectroscopy was used to find the formation of hydrogel while Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM) were used for the characterization of the hydrogel. The FT-IR spectroscopy confirmed hydrogel formation. The DSC results showed that the generated hydrogel is thermally stable, and the SEM depicts a good porous site for dye adsorption. Batch adsorption for Rhodamine B (RDB) and Alkali blue (AB) dyes under the variation of contact time was 105 minutes for both dyes with percentage removal of 89.80 and 60.32%, adsorbent dose was 0.4 and 0.8 g with percentage removal of 86.42 and 57.95%, concentration was 50 and 30 ppm with percentage removal of 67.01 and 77.18% and pH was 8 for both dyes with percentage removal of 77.43 and 79.13% as the optimum. The results indicates that acrylic acid monomer was efficiently grafted on the starch, and the adsorption method correlated with Freundlich isotherm equation. It was concluded that the starch-based hydrogel is an appropriate adsorbent and can be explored for industrial wastewater treatment.

Preparation of Mesoporous Silica Nanoparticles Modified by Urushiol and Their Adsorption on Malachite Green

2021 ◽  
Vol 21 (9) ◽  
pp. 4792-4796
Author(s):  
Xue-Qing Xiao ◽  
Zhi-Yu Chen ◽  
Jia-Wen Chen ◽  
Qin-Hui Chen
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Malachite Green ◽  
Negative Impact ◽  
Mesoporous Silica Nanoparticles ◽  
Sol Gel ◽  
Dye Adsorption ◽  
Chemical Properties ◽  
Adsorption Rate ◽  
Adsorption Method

The presence of malachite green dye in wastewater has a great negative impact on the environment. At present, industrial wastewater is treated using adsorption, electrolysis and membrane separation, among which the adsorption method is the most widely used wastewater treatment. In this study mesoporous silica nanoparticles (MSNs) were prepared using the sol-gel method and modified with the natural polymer urushiol (U) to obtain MSN@Us, which have a core-shell structure. This is the first use of urushiol in dye adsorption. The structures and chemical properties of the MSNs and MSN@Us were characterized. The adsorption of malachite green by the MSNs and MSN@Us showed that the adsorption rate of MSN@Us was higher than that of MSNs, with an adsorption rate greater than 90%. This study provides a new research direction for the use of urushiol in the treatment of contaminated wastewater.

scholarly journals Bio-adsorption of methylene blue dye using chitosan-extracted from Fenneropenaeus indicus shrimp shell waste

2021 ◽  
Vol 10 (4) ◽  
pp. 146-150
Author(s):  
Kantha D Arunachalam
Keyword(s):  
Methylene Blue ◽  
Functional Groups ◽  
Solid Waste Management ◽  
Dye Adsorption ◽  
Blue Dye ◽  
Batch Adsorption ◽  
Methylene Blue Dye ◽  
Adsorption Method ◽  
Fenneropenaeus Indicus ◽  
Shrimp Shell

The cationic dye “Methylene blue” is widely used in textiles industry, pharmaceuticals, paper industries, and ink manufacturing etc, The washed off dyes discharged directly in water bodies and cause major damage to the environment. The molecule of dye is very stable, so that it is very difficult to decompose naturally. Therefore, it is essential to remove the dye by purifying, and prevent the environment from pollution. The –NH2 and -OH functional groups of Chitosan can induce the adsorbing capacity of dyes by its low surface area, porosity and high crystalline nature. Chitosan is an environment friendly, non-toxic, easily available, biodegradable, renewable biopolymer, and harmless to biota. Extraction of chitosan from the “Fenneropenaeus indicus” (Shrimp) shell and its utilization in wastewater treatment controls the environmental problems and contributes to solid waste management. In this study, the possible use of “Fenneropenaeus indicus” (Shrimp) shell chitosan for the bio-adsorption of MB dye was investigated by a batch adsorption method using different adsorbent doses with respect to experimental duration. The maximum amount of dye adsorption was obtained at a minimum dose of 4gram chitosan, with experimental time of 4 hours. The Fenneropenaeus indicus shell chitosan was found to be a better adsorbent since it removes about 93.23% of methylene blue dye from sample water. Further, characterization of functional groups was also done and the changes of groups were observed from both control and treated samples.

scholarly journals Studies on the effect of clay and organic matter contents on the determination of cation exchange properties in clay soils by the ammonium acetate and methylene-blue methods

1969 ◽  
Vol 41 (2) ◽  
pp. 73-81
Author(s):  
Raimo Erviö ◽  
Osmo Mäkitie
Keyword(s):  
Methylene Blue ◽  
Organic Matter ◽  
Ammonium Acetate ◽  
Organic Matter Content ◽  
Dye Adsorption ◽  
Clay Content ◽  
Matter Content ◽  
Exchangeable Cations ◽  
Adsorption Method

The correlation between CEC-values obtained by ammonium acetate and methylene-blue adsorption methods is relatively good (r = 0.86***). The latter method gives, however, about 30 per cent lower values for exchangeable cations. The extraction ratio used in the dye adsorption method has a clear effect on the level of the CEC-values. More complete adsorption was obtained with wider ratios. With increasing clay and humus contents the adsorption becomes more dependent on the soil-dye ratio. The effect of humus is more pronounced than that of clay. The CEC-values obtained by the ammonium acetate method were in better correlation to the clay content of soils than the values obtained by the dye-adsorption method, while the latter values were better correlated to the organic matter content of the soil. The percentages of exchangeable potassium, sodium and, especially, of magnesium, decrease when the clay content decreases, while that of calcium increases slightly. The ratio between exchangeable calcium and magnesium depends on the clay content of the soil ( r = 0.56***) so that the value of the ratio Ca:Mg increases when the clay content decreases (Table 1, q).

Dye adsorption by hydrous alumina in soils

1928 ◽  
Vol 18 (2) ◽  
pp. 350-362 ◽  
Author(s):  
H. H. Croucher
Keyword(s):  
Isoelectric Point ◽  
Dye Adsorption ◽  
Historical Review ◽  
Point Of View ◽  
Adsorption Method ◽  
Lateritic Soils ◽  
Alkaline Side ◽  
Soil Colloids

1. A historical review of the dye adsorption method for the estimation of soil colloids is presented, and the method is criticised chiefly from the point of view of the isoelectric theory.2. A procedure for the detection of hydrous alumina in soils is described, involving the demonstration of the isoelectrio point of hydrous alumina by means of preferential dye adsorption in suspensions of various pH values.3. Satisfactory results were obtained with a mixture of acidic Biebrich Scarlet and basic Iodine Green. The former is adsorbed by hydrous alumina only on the acid side of its isoelectric point, and the latter only on the alkaline side.4. The characteristics of an ideal dye for use in studies such as those described are tabulated.5. The applicability of the mixture of dye-stuffs finally selected is demonstrated for a series of soils of varying basic ratio, and including examples of lateritic soils and clays.

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