Response surface methodology for decolourisation of leather dye using ozonation in a packed bed reactor

Vedaraman, N.; Begum, S. Shamshath; Srinivasan, S. V.

doi:10.1007/s10098-012-0544-8

Cited by 25 publications

(13 citation statements)

References 25 publications

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“…Researchers have investigated several techniques to remove dyes from aqueous phase efficiently, such as coagulation, biodegradation, photodegradation, adsorption (Forgacs et al 2004), ozonation (Vedaraman et al 2013), Fenton processes (Nidheesh et al 2013), and biosorption (Sadaf and Bhatti 2014;Sadhukhan et al 2014). Among them adsorption is a physicochemical method, which does not bring in secondary contaminants, and will save the cost for the water plants if the adsorbents are regenerated conveniently.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Shen

Zhang

et al. 2015

Clean Techn Environ Policy

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Efficient treatment of solutions and solid wastes containing Rhodamine B (RB), a common dye with potential carcinogenicity and sometimes used illegally in food industry, is of great importance because inappropriate treatment may lead to serious human and environmental risks. A novel nanomaterial, the mesoporous silica nanosheets prepared via electrospinning and calcination are applied to the adsorption of RB from aqueous solutions in this work. This sheet-like material is superior to classic powder adsorbents in recoverability, while good availability and stability favor its practical application. The effects of key parameters such as system pH, stirring rate, initial concentration, and contact time are studied. The adsorption isotherm type and the kinetic characteristic are analyzed. The results show that the mesoporous SiO 2 nanosheets are efficient in removing RB from aqueous phase, presenting great potential to become a practical dye adsorbent. Regeneration experiments show that this novel adsorbent can be activated by ethanol extraction process. This study provides the academic field with a successful application case of nanostructured materials, which can be applied to a wider range of dyes similar to RB in physicochemical properties, showing prosperous value in advanced environmental purification.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Shen

Zhang

et al. 2015

Clean Techn Environ Policy

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“…According to Vedaraman et al. (), due to the nonbiodegradable constitution of industrial effluents, they have great COD values, which can be explained by the use of chemical products. The initial COD was 16.7 milligrams of oxygen per liter (mgO 2 /L).…”

Section: Resultsmentioning

confidence: 99%

“…Without proper treatment, the discharge of these effluents constitutes a threat to the environment and to the society, as well, causing modifications in the photosynthesis process, visual pollution, skin and respiratory tract irritation, allergic reactions, and the possible intake of carcinogenic and mutagenic compounds by human beings (Cardoso, ; Vedaraman, Begum, & Srinivasan, ). According to Riga, Soutsas, Ntampegliotis, Karayannis, and Papapolymerou (), this type of effluent is difficult to treat because of its low biodegradability rates, variability of dyes having different molecular structures, high pH, and the diversity of substances added to speed the coloring processes.…”

Section: Introductionmentioning

confidence: 99%

“…Several physical, chemical, and biological methods are currently available for the treatment of textile wastewater. However, these methods either do not result in dye degradation but merely transfer the dye material from one phase to another, or they present limited applicability because of high operational costs (Kaur & Singh, ; Vedaraman et al., ).…”

Section: Introductionmentioning

confidence: 99%

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Solar heterogeneous photocatalysis (ZnO/UV) for textile dyes removal

Melo

Rocha

Silva

2018

Environmental Quality Mgmt

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Solar photocatalytic studies were carried out using zinc oxide (ZnO) as a catalyst for the removal of the cationic methylene blue (MB) dye, and the anionic dye reactive red 198 (RR198), from simple and binary mixed solutions. The following parameters were experimentally investigated: catalyst concentrations (50-250 milliliters [ml]), initial pH of the solution (5, 7, and 9), and time of exposure (20-120 minutes [min]). The catalyst concentration has been found to be the variable with the greatest significance of the three, leading to degradation rates of up to 98% and 100%, for MB and RR198 dyes, respectively. When it comes to the RR198 dye, considerable decolorization rates (up to 75%) were achieved even at the shortest time interval (20 min). The results indicated that, especially for the RR198 dye, the majority of the color removal during the photocatalysis process was due to the adsorption of the dye onto the ZnO surface. Batch scale experiments were performed by mixing both MB and RR198 dyes in order to simulate a synthetic effluent.Color removal rates up to 98% were achieved after 90 min of sunlight exposure. Experiments in a pilot-plant based on compound parabolic collectors were performed under the same conditions, and similar results were obtained. In addition, organic matter removal was investigated and rates up to 70% were achieved. The results showed the feasibility of the solar photocatalysis process with ZnO to achieve considerable rates of color removal from wastewater containing dyes from different classes.

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“…Experimental results were analysed by regression analysis and analysis of variance by statistical methods. The optimum operating conditions for achieving maximum colour and COD removal were found to be at pH: 1.96, dye concentration: 1,159 mg/L, contact time: 10.6 min (min) and at pH: 4.8, dye concentration: 1,159 mg/L, contact time: 17 min, respectively (Vedaraman et al 2013;Hildebrand et al 2014). Use of biomass for removal of industrial dyes (Orange II) by biosorption technique has been investigated.…”

Section: Introductionmentioning

confidence: 98%

Degradation of azo dyes by laccase: biological method to reduce pollution load in dye wastewater

Kanagaraj

Senthilvelan

Panda

2014

Clean Techn Environ Policy

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Laccases are the oldest with low substrate specificity enzymes used for degradation of various compounds, especially, dyes. In the present investigation, the cell-free extract of laccase enzyme is applied to degrade azo dyes used in leather processing. The enzyme degrades the azo dyes rapidly at optimum growth conditions of pH 7.0, temperature 37°C and incubation duration of 72 h. Better production of the enzyme was achieved with dextrose, yeast extract, acetone, copper sulphate and orange peel. The molecular weight of laccase was found to be 63 kDa. The percentage of degradation is found to be 96.4 % for CI Acid black 210 and 92.2 % for the CI Acid black 234. Ultraviolet-visible spectral analysis indicates the presence of peaks in the visible region confirming the complete degradation of the dye sample. Fourier transforminfrared spectroscopy analysis shows the transformation of N=N into either N 2 or NH 3 and then into biomass. The mass spectra analysis shows conversion of azo dye to final product through various intermediates with their respective molecular weights. Chemical oxygen demand (COD) and biochemical oxygen demand (BOD) analysis reveal the reduction of pollution load more than 92 % in the experimental process while maintaining BOD/COD ratio to about 30 %.

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Response surface methodology for decolourisation of leather dye using ozonation in a packed bed reactor

Cited by 25 publications

References 25 publications

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Solar heterogeneous photocatalysis (ZnO/UV) for textile dyes removal

Degradation of azo dyes by laccase: biological method to reduce pollution load in dye wastewater

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