Packed bed column investigation on hexavalent chromium adsorption using activated carbon prepared from<i>Swietenia Mahogani</i>fruit shells

Rangabhashiyam, S.; Suganya, E.; Selvaraju, N.

doi:10.1080/19443994.2015.1055519

Cited by 24 publications

(4 citation statements)

References 40 publications

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“…Specially, the massive production of ACs by activation of particular agricultural wastes, such as peanut shells [ 10 ], and hard-to-dispose wastes, such as waste rubber tires [ 11 ], has been successfully carried out, opening up some new opportunities for AC based adsorbents. Usually, the micropores in ACs could adsorb Cr(VI) via physical interactions such as the Van de Waals force [ 12 , 13 ]. To fulfill the highly efficient removal of Cr species, physical adsorption was not enough.…”

Section: Cr Removal: the Developed Adsorbentsmentioning

confidence: 99%

Removal of Chromium Species by Adsorption: Fundamental Principles, Newly Developed Adsorbents and Future Perspectives

et al. 2023

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Emerging chromium (Cr) species have attracted increasing concern. A majority of Cr species, especially hexavalent chromium (Cr(VI)), could lead to lethal effects on human beings, animals, and aquatic lives even at low concentrations. One of the conventional water-treatment methodologies, adsorption, could remove these toxic Cr species efficiently. Additionally, adsorption possesses many advantages, such as being cost-saving, easy to implement, highly efficient and facile to design. Previous research has shown that the application of different adsorbents, such as carbon nanotubes (carbon nanotubes (CNTs) and graphene oxide (GO) and its derivatives), activated carbons (ACs), biochars (BCs), metal-based composites, polymers and others, is being used for Cr species removal from contaminated water and wastewater. The research progress and application of adsorption for Cr removal in recent years are reviewed, the mechanisms of adsorption are also discussed and the development trend of Cr treatment by adsorption is proposed.

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Section: Cr Removal: the Developed Adsorbentsmentioning

confidence: 99%

Removal of Chromium Species by Adsorption: Fundamental Principles, Newly Developed Adsorbents and Future Perspectives

et al. 2023

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“…where K AB is the Adams-Bohart mass transfer rate constant, L/(mg-min); H is the loading column height, cm; W is the solution flow rate, cm/min; N 0 is the ion adsorption saturation concentration, mg/L; and t is the working time, min. The Thomas model is widely used to analyze the change characteristics of adsorption performance when there are different parameters, such as bed depth, flow rate and concentration [28]. It is expressed by Equation ( 5).…”

Section: Penetration Curve Model Fittingmentioning

confidence: 99%

Dynamic Adsorption Properties of Insoluble Humic Acid/Tourmaline Composite Particles for Iron and Manganese in Mine Wastewater

Liu

et al. 2022

Materials

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Iron- and manganese-contaminated mine water is widespread around the world, and economical and efficient remediation has become a priority. Insoluble humic acid/tourmaline composite particles (IHA/TM) were prepared by combining inorganic tourmaline (TM) with the natural organic polymer humic acid (HA), and the effects of different calcination temperatures and calcination times of TM and IHA on the adsorption of Fe2+ and Mn2+ were analyzed. Based on the microscopic characterization of Scanning electron microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Brunnauer–Emmet–Teller (BET), X-ray diffractometer (XRD) and Fourier transform infrared (FTIR), the simultaneous adsorption performance of IHA/TM on Fe2+ and Mn2+ was studied through dynamic adsorption tests, and a dynamic adsorption model was established. Adsorption regeneration experiments were carried out to further investigate the effectiveness of the composite particles in practical applications. The results show that, when the calcination temperature was 330 °C and the calcination time was 90 min, the removal rates of iron and manganese by the IHA/TM composite particles reached 99.85% and 99.51%, respectively. The curves for penetration of Fe2+ and Mn2+ ions into the IHA/TM composite particles were affected by the bed height, flow rate and influent concentration. Decreasing the flow rate, decreasing the influent concentration, or increasing the bed height prolonged the operation time of the dynamic column. If the bed height was too low, the penetration point was reached before the expected treatment was achieved, and when the bed height was too high, the removal of Fe2+ and Mn2+ was slow, and the utilization rate of the adsorbent was also reduced. If the flow rate was too low, longitudinal remixing easily occurred in the column. However, when the flow rate was too high, the speed of Fe2+ and Mn2+ ions passing through the adsorption layer increased, which reduced the total amount of adsorption. The increase in influent concentration not only reduces the removal rate, but also greatly shortens the total operation time of the dynamic column and reduces the treatment water. The dynamic process for the adsorption of Fe2+ and Mn2+ by IHA/TM was fitted best by the Thomas model. The adsorption column was continuously regenerated five times, and the results show that the IHA/TM composite particles were suitable for iron and manganese removal from mine wastewater. The research results will provide a reference for the effectiveness of the IHA/TM composite particles in practical applications.

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“…This biomass mainly consists of agricultural waste having a rich content of cellulose, lignin and protein components [17]. Various agricultural biomass such as apricot kernel [18], bagasse [19], rice husk [20], mahogany fruit shells [21], eucalyptus sawdust [22], luffa sponge [23] etc. have been studied for activated carbon synthesis and their potential application for chromium removal.…”

Section: K Rambabu Et Al / Desalination and Water Treatment 156 (20mentioning

confidence: 99%

Activated carbon from date seeds for chromium removal in aqueous solution

Rambabu¹,

Banat²,

Gnanasundaram³

et al. 2019

DWT

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In this current work, activated carbon from date seeds (ACDS) was prepared through single step chemical activation using phosphoric acid. ACDS was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Thermogravimetric studies (TGA/DTA), surface chemistry and specific area analysis. Performance assessment of the ACDS was carried out through adsorption of chromium (VI) from its aqueous solution. Effect of adsorption parameters such as contact time (1-120 min), pH (2-8), operating temperature (10-50°C), adsorbent dosage (0.01-0.2 g/50 mL) and initial chromium concentration (5-50 mg/L) on Cr(VI) removal by ACDS was studied in detail. Maximum Cr(VI) adsorption of 42.57 mg/g was obtained for a contact time of 60 min and pH of 2 at 30°C using adsorbent dose of 0.1 g/50 mL for an initial feed concentration of 50 mg/L. The Cr(VI) adsorption efficiency of the ACDS was better as compared against commercial activated carbon. Experimental equilibrium data fitted well with Langmuir isotherm (R 2 = 0.9958) and kinetics studies predicted the pseudo-second order for Cr(VI) adsorption on ACDS. Re-usability studies showed that the ACDS could be used for a maximum of 3 times with a slight reduction in the Cr(VI) removal efficiency (< 10%). Results indicated the promising use of date seed biomass as a cheap and efficient starting material to prepare activated carbon for Cr(VI) removal from chromium polluted wastewater.

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Packed bed column investigation on hexavalent chromium adsorption using activated carbon prepared fromSwietenia Mahoganifruit shells

Cited by 24 publications

References 40 publications

Removal of Chromium Species by Adsorption: Fundamental Principles, Newly Developed Adsorbents and Future Perspectives

Removal of Chromium Species by Adsorption: Fundamental Principles, Newly Developed Adsorbents and Future Perspectives

Dynamic Adsorption Properties of Insoluble Humic Acid/Tourmaline Composite Particles for Iron and Manganese in Mine Wastewater

Activated carbon from date seeds for chromium removal in aqueous solution

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