Dimerization of Cibacron Blue F3GA and other dyes: influence of salts and temperature

Alberghina, Gaetano; Bianchini, Roberto; Fichera, Maria; Fisichella, Salvatore

doi:10.1016/s0143-7208(00)00045-0

Cited by 134 publications

(71 citation statements)

References 31 publications

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“…Generally, an increase in ionic strength will decrease the adsorption capacity due to the existence of electrostatic screening. However, the experimental data from this study did not follow this trend, which was attributed to NaCl ions inducing the aggregation of the CR molecules, enhancing the extent of adsorption on adsorbent (Alberghina et al 2000). Therefore, higher ionic strength was favorable for the adsorption of CR on FM-1.…”

Section: Effect Of Ionic Strengthcontrasting

confidence: 60%

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Li¹,

Lijuan²

2014

BioResources

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Microcrystalline cellulose (MCC) was functionalized with quaternary amine groups for use as an adsorbent to remove Congo Red dye (CR) from aqueous solution. The ultrasonic pretreatment of MCC was investigated during its functionalization. Characterization was conducted using infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The batch adsorption of the functionalized MCC was studied to evaluate the effects of dye concentration, pH of solution, temperature, and NaCl concentration on the adsorption CR. The adsorbent (FM-1) obtained using ultrasonic pretreatment of MCC under 10.8 kJ•g -1 exhibited an adsorption capacity of 304 mg•g -1 at initial pH under a dose of 0.1 g•L -1 and initial concentration of 80 mg•L -1 . After functionalization, the FT-IR and XPS results indicated that the quaternary amine group was successfully grafted onto the cellulose, the surface was transformed to be coarse and porous, and the crystalline structure of the original cellulose was disrupted. FM-1 has been shown to be a promising and efficient adsorbent for the removal of CR from an aqueous solution.

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Section: Effect Of Ionic Strengthcontrasting

confidence: 60%

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Li¹,

Lijuan²

2014

BioResources

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“…The escalates of ionic strength in aqueous solution may result in the compression of the diffuse double layer on the adsorbent. This eases the electrostatic attraction and participates to the adsorption consequently [30][31][32].…”

Section: Effect Of Ionic Strengthmentioning

confidence: 97%

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Youssef¹,

MM²

2013

J Anal Bioanal Tech

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Adsorption of Congo red (CR) from water via batch adsorption experiments onto bentonite and CTAB-modified bentonite (CTAB-MBn) was investigated. Studies concerning the factors influencing the adsorption capacities of bentonite and CTAB-MBn, such as initial dye concentration, adsorbent dosage, pH, ionic strength, contact time and temperature were systematically investigated and discussed. The results revealed that CTAB-modified bentonite demonstrated high adsorption capacities toward acid dyes, while bentonite exhibited sorption capacities lower than CTAB-MBn. The kinetics data were analyzed using first order and pseudo-second order models. It was best described by the pseudo-second order model. The isotherm data were investigated accord¬ing to Langmuir and Freundlich equations. Thermodynamic parameters ΔG°, ΔH° and ΔS° were calculated for the adsorption of CR on bentonite and CTAB-MBn ; the value of ΔG° showed the spontaneous nature of adsorption for both sorbents.

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“…The treatment of NaCl on jute stick facilitates the dye adsorption effectively. This can be attributed to an increase in dimerization of dyes in solution in contact with NaCl salt by the aggregation of dye molecules (Alberghina G et al, 2000). These forces include: vander waals forces; ion-dipole forces; and dipole-dipole forces, which occur between the dye in solution induced by the action of NaCl salt ions.…”

Section: Probable Removal Mechanismmentioning

confidence: 99%

Removal of Levafix Red from Aqueous Solution with Treated Jute Stick and its Relevance to Pharmaceutical Field

et al. 2016

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The adsorption of levafix red (LR) dye from waste water via batch adsorption onto treated jute stick powder was investigated. Studies concerning the factors influencing the adsorption such as adsorbent dosage, pH, contact time and temperature were systematically investigated and discussed. The results revealed that the maximum removal of levafix red was ~91% from water. The kinetics data were analyzed using pseudo-first order and pseudo-second order models. It was best described by the pseudo-second order model. The adsorption equilibrium follows Langmuir isotherm. This result indicates that treated jute stick powder could be employed as low-cost alternatives to commercial activated carbon for the removal of levafix red (LR) from waste water. Rapid industrialization in Bangladesh has resulted in increased water pollution that has higher dye level. Waste water from dyeing and finishing factories is a significant source of environmental pollution. The waste water is typically characterized by high levels of COD (chemical oxygen demand) concentration, high concentration of coloring material, large amount of suspended solids, highly fluctuating pH and high temperature. Dyes may therefore present an ecotoxic hazard and introduces the potential danger of bioaccumulation that may eventually affect man by transport through the food chain. As pharmaceutical industries use lots of water and intake of this type of water might have adverse effects on human health. Therefore, water purification is extremely essential for human and animal health and dye free water may be farther purified for its proper use.

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Dimerization of Cibacron Blue F3GA and other dyes: influence of salts and temperature

Cited by 134 publications

References 31 publications

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Functionalization of Microcrystalline Cellulose with N,N-dimethyldodecylamine for the Removal of Congo Red Dye from an Aqueous Solution

Adsorption of Acid Dyes onto Bentonite and Surfactant-modified Bentonite

Removal of Levafix Red from Aqueous Solution with Treated Jute Stick and its Relevance to Pharmaceutical Field

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