Removal of Cr (VI) from aqueous solution using MCM-41

Lin, Tingyu; Xie, Gang; Li, Rongxing; Yu, Xiaohua; Hou, Yanqing

doi:10.5004/dwt.2011.2521

Cited by 18 publications

(9 citation statements)

References 48 publications

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“…The removal of Cr(VI) from aqueous state by using MCM-41 has been reported, but the concentration of Cr(VI) taken was up to 10 mg/L [22]. NMR studies revealed that an estimated 8-27% of the silicon atoms in MCM-41 are linked with pendant OH groups of Si OH [23].…”

Section: Introductionmentioning

confidence: 97%

Adsorption of toxic metal ion Cr(VI) from aqueous state by TiO2-MCM-41: Equilibrium and kinetic studies

Parida

Mishra

Dash

2012

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 97%

Adsorption of toxic metal ion Cr(VI) from aqueous state by TiO2-MCM-41: Equilibrium and kinetic studies

Parida

Mishra

Dash

2012

Journal of Hazardous Materials

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“…Recently, there has been a growing concern with environmental protection and therefore the removal of hexavalent chromium from water and wastewater is of great importance due to its toxicity [19][20][21]. Several methods are reported in literature for the removal of toxic metal ions from aqueous solutions [22,23].…”

Section: Introductionmentioning

confidence: 99%

Kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) using Tulsion A-27(MP) resin

Koujalagi¹,

Divekar²,

Kulkarni³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TThe kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) from aqueous and in presence of industrial solvents 2-methoxyethanol and 2-ethoxyethanol with macroporous resin Tulsion A-27 was studied at varying concentration of Cr(VI), adsorbent dosage, pH, contact time, and temperature. Batch shaking sorption experiments were carried out to evaluate the performance of Tulsion A-27(MP) anion exchange resin in the removal of Cr(VI) from aqueous and mixed aqueous solvents, 2-methoxyethanol and 2-ethoxyethanol. The concentrations of Cr(VI) in aqueous and mixed aqueous solvents were determined by UV-Visible spectrophotometer. As the adsorption process is pH dependent, it showed maximum removal efficiency of Cr(VI) in the pH range of 5-6 for an initial chromium concentration of 0.0011 M. Effect of temperature on the equilibrium constant was studied and the thermodynamic parameters were evaluated. Kinetic experiments revealed the dominance of adsorption. The sorption models, Langmuir and Freundlich adsorption isotherms, were discussed on amount of Cr(VI) uptake. The resin was analyzed by infrared spectroscopy and scanning electron microscopy before and after the adsorption process. The sorption of Cr(VI) by the anion exchange resin was reversible and so it has good potential for the removal/ recovery of Cr(VI) from aqueous and mixed aqueous solvents. The anion exchange resin can be used for the efficient removal of Cr(VI) from water and wastewater.

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“…It can enter human body through food chain, which can cause cancer (lung and kidney) and bronchogenic carcinoma. Therefore, WHO and USEPA have set a bearable limit of 0.05 ppm and 2 ppm for dissolved Cr(VI) and total Chromium, respectively, in drinking water …”

Section: Introductionmentioning

confidence: 99%

“…Variety of methods including physico‐chemical, biological, electrochemical, ion exchange, ultrafiltration, reverse osmosis, electro‐dialysis, etc . have been reported for heavy metals removal.…”

Section: Introductionmentioning

confidence: 99%

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Single and Binary Adsorption of Zn (II) and Cr (VI) Heavy Metals onto Synthesized Silica ‐Based MCM‐41

2019

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Effluents from numerous Industries like textile, paint, pharmaceutical, steel and electroplating industries liberate both Zinc [Zn (II)] and Chromium [Cr (VI)] heavy metals. In this work, adsorptive interaction of toxic Zn (II) heavy metal in aqueous solution with synthesized mesoporous silica based MCM‐41 was investigated. Further, the effects of presence of Cr (VI) heavy metal on the adsorption of Zn (II) and vice versa were investigated by simultaneous competitive binary adsorption from Cr (VI) and Zn (II) aqueous binary solution. Batch experiments were executed to see the effects of parameters like pH, adsorbent dose (m), adsorbate concentration and adsorption time (t). Optimum conditions for Zn (II) treatment were obtained as: initial pH (pHi) =7, m=0.1 g/L and t=2 h. Competitive adsorption of both Cr (VI) and Zn (II) from their binary solution was studied at 288− 308 K temperatures. Obtained equilibrium data were then fitted to different competitive multicomponent isotherm models like Langmuir (extended), Freundlich isotherm (extended), Sheindrof‐Rebuhn‐Sheintuch (SRS) isotherm and Redlich‐Peterson isotherm (modified) models, and various isotherm interaction parameters were calculated.

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Removal of Cr (VI) from aqueous solution using MCM-41

Cited by 18 publications

References 48 publications

Adsorption of toxic metal ion Cr(VI) from aqueous state by TiO2-MCM-41: Equilibrium and kinetic studies

Adsorption of toxic metal ion Cr(VI) from aqueous state by TiO2-MCM-41: Equilibrium and kinetic studies

Kinetics, thermodynamic, and adsorption studies on removal of chromium(VI) using Tulsion A-27(MP) resin

Single and Binary Adsorption of Zn (II) and Cr (VI) Heavy Metals onto Synthesized Silica ‐Based MCM‐41

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