Decolourization of aqueous dye solutions by a novel adsorbent: Application of statistical designs and surface plots for the optimization and regression analysis

Ravikumar, K.; Deebika, B.; Balu, K.

doi:10.1016/j.jhazmat.2005.03.008

Cited by 181 publications

(80 citation statements)

References 23 publications

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“…The discharge of colored wastewater has caused a great impact on industry as well as causing harm to the environment, especially, the textile, leather, paper, and plastic industries (Ravikumar et al 2005). There are over an estimated 100,000 kinds of commercially available dyes with an output of > 7  10 5 tons per year.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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 optimal temperature identified for maximum removal percentage is 56.8°C/329°K, beyond which the removal efficiency begins to decline. This is possibly associated to the exothermic characteristic where desorption process is anticipated to take place [17,29]. The adsorption process is enhanced at longer contact time nevertheless the process appears to slow down after 43 min when the equilibrium is reached [17].…”

Section: Resultsmentioning

confidence: 99%

Application of central composite design for optimization of the removal of humic substances using coconut copra

Lee

Krongchai

et al. 2015

Int J Ind Chem

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Coconut copra is a potential biosorbent for removal of humic substances from peat swamp runoff. In this paper, response surface methodology was applied to evaluate the optimum conditions for removal of humic substances from peat swamp runoff using modified coconut copra. Batch adsorption experiments were conducted according to central composite design. Results show that the quadratic model is best fitted for predicting the removal efficiency with regression coefficients closer to 1 and a lower root mean square error. Dosage is found to have significant influence on the removal efficiency with p \ 0.05. Response surface models further identified the optimum dosage, contact time and temperature at 4.56 g modified coconut copra per 100 mL peat swamp runoff, 42.9 min and 56.8°C/329°K, respectively attaining the maximum removal efficiency of 88.19 %. The predicted removal efficiency was confirmed experimentally under the modelled optimum conditions; the removal efficiency attained (86.54 %) was in good agreement with the predicted value.

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“…Adsorption is used widely to remove chromium metals from waters and industrial wastewaters. Adsorption offers significant advantages like low cost, availability, profitability, ease of operation and efficiency, in comparison with conventional methods (such as membrane filtration or ion exchange) especially from economic and environmental points of view [13], [14], [15], [16]. In this study two adsorbents are used for removal of chromium by adsorption method:…”

Section: Adsorptionmentioning

confidence: 99%

Perfomance Evaluation of Fly Ash and Red Brick Dust for Recovery of Chromium From Tannery Wastewater by Adsorption Method

Rehman¹,

Khan²,

Rashid³

et al. 2017

Earth sci. Pak.

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Waste water contains hazardous chemicals released from industries and affects adversely aquatic life as well as deteriorates surface and groundwater quality. The industrial effluent is disposed into drains without treatment thus worsening condition. It alters the living condition of aquatic life and effects the environment adversely. It affects human being some time directly and sometime indirectly. Chromium contamination is a serious problem because of cancer-causing effect of the pollutants and low recovery rate of chromium owing to the existence of organics, such as protein as well as fat. Objective of this study was to determine viability of adsorbents like fly ash and red brick dust for chromium ions recovery from tannery wastewater. Aqueous solutions of Cr(III) was prepared by dissolving the specific amounts of chromium Sulphate in de ionized water. Concentration of Cr (III) was determined by atomic absorption spectrophotometer. The adsorption of chromium on fly ash as well as red brick dust was determined at different Cr (III) concentrations, contact time, adsorbent dosage and pH. By comparing results of both adsorbents it was concluded that performance efficiency of both fly ash and red brick dust was good for removal and recovery of chromium. But red brick dust was more effective as compared to fly ash. Because maximum recovery of chromium was observed at pH 4; adsorbent red brick dust; contact time 3hours; and adsorbent dosage 1000g. Red brick dust declared as good adsorbent for the recovery of chromium from tannery waste water.

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Decolourization of aqueous dye solutions by a novel adsorbent: Application of statistical designs and surface plots for the optimization and regression analysis

Cited by 181 publications

References 23 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

Application of central composite design for optimization of the removal of humic substances using coconut copra

Perfomance Evaluation of Fly Ash and Red Brick Dust for Recovery of Chromium From Tannery Wastewater by Adsorption Method

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