Removal of Congo Red from Aqueous Solutions by Perlite

Vijayakumar, G.; Dharmendirakumar, M.; Renganathan, S.; Sivanesan, S.; Baskar, G.; Elango, K. P.

doi:10.1002/clen.200800228

Cited by 71 publications

(25 citation statements)

References 25 publications

(24 reference statements)

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“…In addition, it finds some applications in agriculture for growing of seeds and regularizing of the soil, thus suggesting some potential for use as CWS support matrix. As a sorbent, due to the presence of a significant amount of silanol groups on its surface, it features interesting adsorptive qualities and it has already been studied for the sorption of several different types of organic compounds, namely dyes [244][245][246][247], pesticides [74], pharmaceuticals [74] and surfactants [248].…”

Section: Zeolites and Other Siliceous Materialsmentioning

confidence: 99%

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Dordio

Carvalho

2013

Journal of Hazardous Materials

188

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Section: Zeolites and Other Siliceous Materialsmentioning

confidence: 99%

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Dordio

Carvalho

2013

Journal of Hazardous Materials

188

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“…SEM analysis is one of the most widely used methods to investigate the surface morphology and physical properties of the adsorbent [31]. The surface structure of plant biomass before accumulation of Basic violet 14 was analyzed by scanning electron microscope with a magnification of 10 mm at 15 kV (Fig.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Equilibrium Uptake and Bioaccumulation of Basic Violet 14 Using Submerged Macrophyte Hydrilla verticillata

Gopalakrishnan

Saravanan

Dharmendirakumar

et al. 2011

CLEAN Soil Air Water

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Equilibrium Uptake and Bioaccumulation of Basic Violet 14 Using Submerged Macrophyte Hydrilla verticillataThe percentage removal and uptake capacity of Basic Violet 14 using Hydrilla verticillata with living biomass was studied under batch conditions. The survival of H. verticillata was studied using the chlorophyll content in the living biomass. Bioaccumulation of Basic Violet 14 using H. verticillata was tested by varying the wet sorbent dosage (0.5-2.5 g), initial pH (3-8), and initial dye concentrations (5-25 mg L À1 ). The results show that the plant was effectively accumulating the Basic Violet 14 dye. The uptake capacity of Basic Violet 14 dye was observed as 5.9 and 21.3 mg g À1 at the initial dye concentration of 5 and 25 mg L À1 , respectively, for a biomass of 5 g L À1 (wet weight) at pH 7.0 for 144 h. In general, the plant growth was found to be normal at lower concentrations and showed higher removal efficiency. It was also observed that removal efficiency of H. verticillata was found to decrease with increase in initial dye concentration. The biomass sample surface was analyzed using SEM imaging and functional groups present in the biomass were analyzed using FTIR. The equilibrium uptake capacity was analyzed by Langmuir and Freundlich isotherms. The equilibrium data was found to be fit well to both Langmuir and Freundlich isotherm models with higher coefficient of determination. In the last decades, the use of phyto-technologies has become an effective alternative method for the remediation of contaminated water systems [5]. Phytoremediation is defined as the use of plants, both terrestrial and aquatic; to absorb, concentrate, and precipitate contaminants from polluted aqueous sources with low contaminant concentration in their roots [6]. The U.S. Environmental Protection Agency (EPA) seeks to protect human health, environment associated with hazardous waste sites, and encourages the development of innovative technologies such as phytoremediation to clean up hazardous sites [7].Most of the work has been already established on the accumulation of heavy metal using plant such as Hydrilla verticillata for cadmium accumulation [8], Pistia stratiotes for arsenate uptake [9], Wolffia globosa for an indicator of metal pollution in the water bodies [10], P. stratiotes for lead uptake [11]. Only limited work has been established for the removal of textile dyes using living aquatic plant. In this present study, H. verticillata was used as living biomass for the accumulation of basic dye from synthetic dye solution.Basic dyes are salts of the colored organic bases containing amino and imino groups and also combined with a colorless acid, such as hydrochloric or sulfuric acid. They are brilliant and most fluorescent among all synthetic dyes. Basic Violet 14 was selected as a model compound to estimate the accumulation capacity of H. verticillata. It is a submerged plant, and it has been observed to grow luxuriantly in various contaminated water bodies of India [12]. H. verticillata has attracted the attention ...

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“…Among the dye removal processes, the adsorption is widely applied because of the system flexibility, low cost as well as low energy consumption. A wide variety of porous materials, such as agricultural waste [6], polymers [7][8][9], carbon materials [10][11][12], clay minerals [13][14][15][16], and other solid materials [5,[17][18][19][20] have been investigated as adsorbents for the removal of dyes. In recent years, polymeric composite adsorbents have been increasingly used to remove and recover dyes from waste streams due to their wide variations in porosity, surface chemistry, and higher thermal stability especially regenerability on site [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Amaranth Dye onto Alumina Reinforced Polystyrene

Ahmad

Kumar

2010

CLEAN Soil Air Water

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Adsorptive removal of toxic amaranth dye by alumina reinforced polystyrene (ARP) composite was studied as a function of contact time, pH, initial dye concentration, and temperature. The results indicated that adsorption was strongly dependent on pH and temperature of the dye solution. The adsorption was favored at low pH with the maximum removal at pH 2.0. Langmuir, Freundlich, Temkin, and DubininRadushkevich (D-R) models were used for the description of adsorption equilibrium data and the best interpretation for the experimental data was given by the D-R model. The adsorption kinetics was tested using pseudo first order, pseudo second order, Elovich, intraparticle, and film diffusion models and the removal by ARP followed a pseudo second order kinetics. Thermodynamic studies revealed that both adsorption and desorption was spontaneous and endothermic in nature. From the exhausted adsorbent, about 70 and 96% desorption was obtained with (99%) CH 3 OH and 0.1 M NaOH, respectively.

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Removal of Congo Red from Aqueous Solutions by Perlite

Cited by 71 publications

References 25 publications

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Organic xenobiotics removal in constructed wetlands, with emphasis on the importance of the support matrix

Equilibrium Uptake and Bioaccumulation of Basic Violet 14 Using Submerged Macrophyte Hydrilla verticillata

Adsorption of Amaranth Dye onto Alumina Reinforced Polystyrene

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