Adsorption studies on treatment of textile wastewater using low-cost adsorbent

Kumar, K. Senthil; Devi, V. Chitra; Mothil, S.; Kumar, Manoj

doi:10.5004/dwt.2018.22756

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…In the beginning, the initial amount of available active sites can be freely adsorbed, resulting in a rapid increase in the Ni(II) removal rate. However, as the adsorption site becomes gradually occupied by Ni(II), the rate of removal decreases and the adsorption tends to be balanced [35]. Indeed, we have demonstrated here that 75 min is a balance time that is logically and economically advantageous.…”

Section: Effect Of Contact Time On Twgac and Ngacmentioning

confidence: 66%

Performance evaluation of adsorptive removal of Ni(II) by treated waste granular-activated carbon and new granular-activated carbon

Wang¹,

Wang²,

Xu³

et al. 2019

Desalination and Water Treatment

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Granular-activated carbon is a commonly used adsorbent in water treatment. It can be reused by regeneration when saturated, but there are limits to the number of regenerations in actual engineering. This study created a simple and economical treatment method allowing for the reuse of waste granular-activated carbon (WGAC) that approaches the regeneration limit. The adsorption kinetics, equilibrium, and thermodynamics of Ni(II) onto the treated waste granular-activated carbon (TWGAC) and the new granular-activated carbon (NGAC) were studied. The N 2 adsorption/ desorption isotherms, zeta potential, SEM, energy-dispersive spectrometry and FTIR spectra were used to characterize and compare the NGAC and TWGAC. Analysis revealed that the structure of WGAC was severely damaged, but the adsorption capacity and adsorption mechanism after treatment were similar to those of NGAC. Experimental data showed that the pseudo-second-order kinetic model and the Freundlich isothermal model had high correlation coefficients (R 2 > 0.99). The maximum adsorption capacity of TWGAC and NGAC was 138.9 and 123.5 mg g-1. Thermodynamic parameters, including the negative values ΔG, positive values ΔH, and positive value ΔS, indicated that the current adsorption processes of TWGAC and NGAC were feasible, spontaneous and endothermic. After three cycles, TWGAC's removal rate for Ni(II) remained as high as 95.3%.

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Section: Effect Of Contact Time On Twgac and Ngacmentioning

confidence: 66%

Performance evaluation of adsorptive removal of Ni(II) by treated waste granular-activated carbon and new granular-activated carbon

Wang¹,

Wang²,

Xu³

et al. 2019

Desalination and Water Treatment

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“…was carried out at varying adsorbent dose (0.2-1 gm/100 ml) while pH (6) was kept constant for Cr. The increase in adsorbent dosage leads to an increase of metal removal that was observed and was shown in Figure 4.…”

Section: Influence Of Adsorbent Dosage Adsorption Experimentsmentioning

confidence: 99%

“…Various processes of sources of chromium and lead metals are mining, tanning, cement, textile and dyeing, electroplating industries, steel, photographic material, and paints. Heavy metals removed from wastewater using various technologies like ion exchange process, flocculation, precipitation process, membrane filtration, RO, and phytoremediation are the conventional methods, and the merits and demerits of each method have extensively reviewed [6,7]. The conventional process has demerits such as increasing the disposal problems due to the large amount sludge production, and treated wastewater is contaminated and very difficult to treat the toxic industrial wastewater because of high biological demand, total solids, and huge amount of weakly biodegradable and toxic matters.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Chromium Ions from Aqueous Solutions by Synthesized Nanoparticles

Kandasamy¹,

Velusamy²,

Thirumoorthy³

et al. 2022

Journal of Nanomaterials

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In the present manuscript, an attempt has been made to remove chromium metal ions from synthetic effluent using adsorption process. The synthesized titanium dioxide nanoparticles were used as adsorbents. Adsorption studies were performed in batch process. Various characterization of synthesized nanoparticles such as XRD analysis, optical properties of nanoparticles using UV-visible absorption spectroscopy, concentration of chemical bonds, and atomic arrangement using (FTIR) have been performed and analyzed. The dependency of adsorption percentage of metal ions and equilibrium amount of metal adsorbed with respect to pH, adsorbent dosage, initial concentration, and temperature are studied. Mechanisms of metal ion adsorption process explained by various adsorption isotherms and adsorption kinetic models. The criteria for statistical significance of correlation coefficient ( R 2 ) for fitting the experimental data to the various isotherms were tested and analyzed. The experimental results reveal that synthesized titanium dioxide nanoparticles could be used as adsorbents in order to remove chromium ions present in industrial wastewater.

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