Application of chemically modified beach sand as low cost efficient adsorbent for dye removal (original) (raw)
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European Chemical Bulletin, 2014
Triarylmethane dyes have been identified as one of the toxic dyes. The presence of triarylmethane dyes in water act as pollutant and cause hazardous effect on natural resources, aquatic life as well as to human being. Triarylmethane dyes are extensively used for wool, silk, cotton, leather and paper industries. In the present work, natural sand has been utilised as an adsorbent for developing methodology for the removal of these dyes, which does not easily biodegrades in aqueous medium. The adsorption efficiency of natural sand was tested by using Victoria Blue (VB) as model dye. The adsorpion behaviour as a function of the pH of the aqueous dye solution, the contact time, initial concentration of the dye and the amount of adsorbent was studied. All studies were performed at room temperature (298 K). It was observed that under optimized conditions, 91 % of VB can be removed from aqueous media. The adsorption data was fitted well by the Langmuir and Freundlich adsorption isotherm; pseudo-second-order and intraparticle diffusion models were also applied.
Adsorption of Dyes Using Different Types of Sand: A Review
ABSTRACT Thethreatposedbyincreasingamountofdyesondailybasis,especiallyonourecosystem,hasbroughtaserioussearchformore efficientlow-costadsorbents.Sandismixedwithcementandwatertomakeconcrete,usedinthemanufactureofbrick,glass andothermaterials,anditcanalsobeusedasamediumforthefiltrationofwater.Sand,whichisubiquitous,hasbeenusedasan adsorbentbecauseofitsenormousavailabilityinthelocalenvironment.Thisreviewrevealsthatfurtherresearchmustbe conductedtobringtotheforetheexpansivelaboratory,industrialandenvironmentalusageofsandmaterialsasdyeadsorbents. Consequently,theusageofdifferenttypesofsandinthefieldofadsorptionsciencerepresentsaviableandpowerfultool,result- ing into the superior improvement in pollution control and environmental preservation.
Sandpaper Wastes as Adsorbent for the Removal of Brilliant Green and Malachite Green Dye
Acta Chimica Slovenica, 2019
Sandpaper wastes were used as adsorbent after pyrolysis at 500 °C and calcination at 800 °C for the removal of brilliant green and malachite green cationic dye from an aqueous solution. The effects of the pH, the adsorbent dose, the contact time, and the initial dye concentration on the removal efficiencies were investigated. The isotherm studies were conducted by using the Langmuir, Freundlich, and Dubinin-Radushkevich models, and thermodynamic studies were also performed. The adsorption of the Brilliant green and malachite green were found to comply with the Langmuir isotherm model and the Freundlich isotherm model, respectively. The thermodynamic studies showed that the adsorption of dyes were endothermic. The E values obtained from the Dubinin-Radushkevich isotherm showed that the adsorption mechanism was chemical in nature. Furthermore, the three kinetic models (pseudo first-order, pseudo second-order, and intraparticle diffusion) were investigated. It was found that the pseudo second-order kinetic model fitted well for adsorption of dyes.
Equilibrium and kinetic adsorption study of aqueous basic dye solutions using waste foundry sand
International Journal of Global Warming, 2017
The aim of this study is to evaluate adsorption kinetics, isotherms and thermodynamic parameters of crystal violet (CV) and methylene blue (MB) dyes from aqueous solution using waste foundry sand. Adsorption studies were carried out at different initial dye concentrations (12.5-400 mg l-1), contact time (5-240 min), pH (3.0-9.0), sorbent doses (0.125-2 g l-1) and adsorption temperature (20°C-70°C). The equilibrium adsorption data were analysed by Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) adsorption isotherm models. Of the four adsorption isotherms, the R 2 value of Langmuir isotherm model for MB and CV were 0.969 and 0.926, respectively. Experimental data were analysed using the pseudo-first order, the pseudo-second order, intraparticle diffusion and Elovich models. The characteristic parameters for each model have been determined. In addition, the equilibrium thermodynamic parameters, including changes in Gibbs free energy, entropy and enthalpy are determined for the CV and MB on waste foundry sand.
Batch and column adsorption of dye contaminants using a low-cost sand adsorbent
In the current study, the sand collected from a specific location called Ruba Al-Khali in Saudi Arabia has been identified and efficiently used for the removal of dye contaminate through adsorption process. It was found that the crystalline SiO 2 (including quartz and cristobalite SiO 2 ) is the major component in the micrometer-sized sand adsorbent with lava-like rough surface. Batch adsorption experiments were investigated and discussed by using Rhodamine B (RhB) as the model toxic contaminant. The adsorption of RhB with the exothermic nature is considered to be more favorably by the pseudo-second-order model. The corresponding adsorption capacity at room temperature is examined at around 2.94 mg g -1 by Langmuir fitting. Furthermore, the effects of empty bed contact time, initial concentration, and the pH value of RhB solution on the breakthrough point in the column adsorption process were investigated.
IJERT-Removal of Dyes by Using Low Cost Adsorbents Agricultural Wastes and Sand
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/removal-of-dyes-by-using-low-cost-adsorbents-agricultural-wastes-and-sand https://www.ijert.org/research/removal-of-dyes-by-using-low-cost-adsorbents-agricultural-wastes-and-sand-IJERTV3IS10351.pdf Dyes removal from wastewater has been a matter of concern, both in the aesthetic sense and health point of view. Dyes removal from textile effluents on a continuous industrial scale has been given much attention in the last few years, not only because of its potential toxicity, but also mainly due to its visibility problem. There have been various promising techniques for the removal of dyes from wastewater. However, the effectiveness of adsorption for dye removal from wastewater has made it an ideal alternative to other expensive treatment methods. The review evaluates different agricultural waste materials and different types of sands as low-cost adsorbents for the removal of dyes from wastewater. The review also outlines some of the fundamental principles of dye adsorption on to adsorbents. Sand is mixed with cement and water to make concrete, used in the manufacture of brick, glass and other materials, and it can also be used as a medium for the filtration of water. Sand has been used as an adsorbent because of its enormous availability in the local environment. This review reveals that further research must be conducted to bring to the fore the expansive laboratory, industrial and environmental usage of sand materials as dye adsorbents. Consequently, the usage of different types of sand in the field of adsorption science represents a viable and powerful tool, resulting into the superior improvement in pollution control and environmental preservation.
Adsorption of textile wastewater on alkali-activated sand
Journal of Cleaner Production, 2019
This paper deals with the removal of residual dyes from actual textile wastewater after receiving coagulation-flocculation treatment by employing alkali-activated local sand as a novel low-cost adsorbent. The activation process was found to increase the surface area and negative charge on the sand surface thereby offering good adsorption capacity. Batch adsorption studies were carried out with respect to contact time (3-30 minutes) and amount of adsorbent (12.5-100 g) to evaluate its dye removal capacity from wastewater. The surface of natural, modified and dye adsorbed sand was characterized using X-ray Diffraction analysis (XRD), Scanning Electron Microscopy (SEM), Zeta Potential Analysis and Fourier Transform Infrared Spectroscopy (FTIR) to understand the mechanism of sorption. To examine the adsorption behavior Lagergren's pseudo-first order, second order, and intraparticle diffusion models were applied for kinetic studies. These studies indicated that pseudo-second order model fitted the best; yielding a high correlation coefficient (R 2) of more than 0.995. The color removal using modified sand was found to be 70% in first 3 minutes while non-modified sand could only remove 40% of dye molecules, even after 20 minutes of adsorption. The results suggest that the activated sand can be used as a cost-effective adsorbent for color removal from wastewater of textile industries.
Removal of Cationic Dye Methylene Blue from Aqueous Solution by Adsorption on Algerian Clay
International Journal of Waste Resources, 2015
The objective of this study was to demonstrate the potential of Tiout-Naama (TN) clay for removing a cationic Methylene blue (MB) dye from aqueous solutions which was used for the first time like an adsorbent. For this, the effect of several parameters such as contact time, adsorbent dose, pH and temperature have been reported. Nearly 30 min of contact time are found to be sufficient for the adsorption to reach equilibrium. The residual concentration of the dye is determined using UV/Vis Spectrophotometer at wavelength 664 nm. Langmuir and Freundlich isotherm models were used to describe adsorption data. The result revealed that the adsorptions of MB dye onto TN clay is the best-fit both Langmuir and Freundlich isotherms, further to understand the adsorption kinetics the adsorption data were analyzed by the second-order and the pseudo-second-order. The results show that the methylene blue adsorption follows pseudo-second-order kinetics.
Adsorption of Basic Dye Using Environmental friendly adsorbent
IOP Conference Series: Materials Science and Engineering, 2020
This study was included using the walnut husks powder as efficient adsorbent material to remove the Azure C dye from its aqueous solution. the effects of (pH), contact time, temperature and the adsorbent quantity were evaluated. the highest adsorption efficiency 98.17% was recorded with 5 ppm of dye according to the law of Beer Lambert (calibration curve for dye), 0.02g of adsorbent material 10 min as contact time and 328 K. The removal data using Freundlich , Langmuir and Temkin models were analyzed at various temperature varying from 298 to 328 K, and the adsorption thermodynamic parameters were studied. In which ΔG values indicates spontaneous process, ΔH refers to endothermic property of the adsorption process and ΔS prove increase in randomness at the solid/solution interface.
Studies on the removal of Neutral Red on sand from aqueous solution and its kinetic behavior
Dyes and Pigments, 2007
Neutral Red (NR) dye in aqueous solution present as a pollutant material in textile waste water was removed by adsorption on sand at 298 K. Local sand sample which was used as an adsorbent in this work was initially characterized for its textural properties including surface area, mean pore radius and total pore volume. These properties were examined from the low-temperature adsorption of nitrogen on sand samples at 77 K. Later on the conditions of maximum adsorption of the dye on characterized sand sample were optimized. It was seen that under optimized conditions, up to 85% dye could be removed from solution onto the sand surface. The adsorption data were fitted to Freundlich and Lagergen equation for the calculation of various adsorption parameters. The Freundlich constants n and A were determined to be 0.997 and 0.2001 mol/g, respectively. The rate constant for adsorption of Neutral Red on sand sample as calculated by using the Lagergen equation was estimated to be 3.85 min À1 . The application of Boyd's equation revealed that particle diffusion was not operative in this case and thus does not control the kinetics of dye adsorption on sand. The adsorption behavior of the dye was also investigated in terms of added cations and anions. It was found that the dye adsorption decreased in the presence of chloride, sodium and copper ions.