Adsorption of Cr(VI) onto cationic surfactant-modified activated carbon

Choi, Hyun-Doc; Jung, Woo-Sung; Cho, Jung-Min; Ryu, Byung-Gon; Yang, Jung‐Seok; Baek, Kitae

doi:10.1016/j.jhazmat.2008.11.076

Cited by 107 publications

(34 citation statements)

References 13 publications

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“…However, for the raw and activated samples with 20% H 3 PO 4 and steam, the bed volumes were found to be 3 BV, 2 BV, and 1 BV, respectively. It appears that the Palm branches activated with 50% H 3 PO 4 are more selective for Cr(VI) adsorption than the other activated Palm tree branches [11] as shown in Table 4.…”

Section: Column Studiesmentioning

confidence: 92%

“…/ is then plotted against bed volume in order to obtain the breakthrough curve. The maximum column capacity, total (mg), for a given feed concentration and flow rate is equal to the area under the plot of the adsorbed Cr(VI) concentration and is calculated as follows [11]:…”

Section: Column Studiesmentioning

confidence: 99%

“…Activated carbons are carbonaceous materials that have highly developed porosity, internal surface area, and relatively high mechanical strength [9,10]. In recent years, investigations have been carried out for the effective removal of large quantities of Cr(VI) from wastewater using low-cost, nonconventional adsorbent [11,12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Physical and Chemical Activation on the Removal of Hexavalent Chromium Ions Using Palm Tree Branches

Khedr¹,

Shouman²,

Fathy³

et al. 2014

ISRN Environmental Chemistry

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Nowadays the removal of heavy metals from wastewater is essential due to their high toxicity and impact on human health. In the present study, branches of palm trees were converted into activated carbon by chemical and physical activation. The prepared samples were used for the removal of Cr(VI) from their aqueous solution. Chemical activation was carried out using (20 and 50%) H 3 PO 4 and K 2 CO 3 , and physical activation was performed using steam. Batch adsorption experiments were carried out to examine the removal process under factors such as pH and pH pzc . The metal ion removal was pH dependent and reached maximum removal at pH 2. Experimental data were analyzed using Langmuir, Freundlich, and Flory-Huggins isotherms. The adsorption studies revealed that the removal of Cr(VI) ions was well fitted with Langmuir isotherm. The adsorption kinetics well fitted using a pseudo second-order kinetic model. Column studies revealed that the highest bed volume (60 BV) was observed for the sample activated with 50% H 3 PO 4 . The adsorption efficiency was enhanced with acid treatment (50% H 3 PO 4 ) and reduced by steam.

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Section: Column Studiesmentioning

confidence: 92%

Section: Column Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Physical and Chemical Activation on the Removal of Hexavalent Chromium Ions Using Palm Tree Branches

Khedr¹,

Shouman²,

Fathy³

et al. 2014

ISRN Environmental Chemistry

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“…A well comparison of the data obtained during this study and those of literature are given in Table 2. It is indicated that absorption capacities of p(AN-co-APTMACl), amid-p(AN-co-APTMACl) and p(APTMACl) are very well when compared those of literature (Sahiner et al, 2011a;Kumar and Chakraborty, 2009;Choi et al, 2009;Ozay et al, 2011;Deng and Bai, 2004;Li et al, 2009).…”

Section: Absorbentsmentioning

confidence: 93%

Removal of As(V), Cr(III) and Cr(VI) from aqueous environments by poly(acrylonitril-co-acrylamidopropyl-trimethyl ammonium chloride)-based hydrogels

Dudu

Şahiner

Alpaslan

et al. 2015

Journal of Environmental Management

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“…Standard enthalpy (DH°), free energy (DG°), and entropy change (DS°) were calculated to determine the thermodynamic feasibility and the spontaneous nature of the process (Choi et al 2009). The free energy change of the sorption reaction is given by:…”

Section: Thermodynamic Adsorptionmentioning

confidence: 99%

The potential use of activated carbon prepared from Ziziphus species for removing dyes from waste waters

Regti¹,

Laamari²,

Stiriba³

et al. 2017

Appl Water Sci

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In this study, the adsorption potential of activated carbon prepared from Ziziphus mauritiana nuts for the removal of methylene blue (MB) from aqueous solution has been investigated using batch mode experiments. The effects of some operating parameters on the removal dye such as, initial pH (2-12), temperature (298-328 K), initial MB concentration (20-100 mg L -1 ), and contact time (5-70 min) were investigated. Adsorption kinetic showed that the rate adsorption followed the pseudo-second-order kinetic model. Four adsorption isotherms models were applied to experimental equilibrium data (Langmuir, Freundlich, Redlich-Peterson, and Fritz-Schlunder) and the different constants were calculated using non-linear equations models. Fritz-Schlunder model was found the best one to describe the adsorption process which suggests that the adsorption of MB onto activated carbon derived from Ziziphus mauritiana is heterogeneous with a multilayer. Thermodynamic adsorption showed that the process was endothermic and spontaneous in nature.

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Adsorption of Cr(VI) onto cationic surfactant-modified activated carbon

Cited by 107 publications

References 13 publications

Effect of Physical and Chemical Activation on the Removal of Hexavalent Chromium Ions Using Palm Tree Branches

Effect of Physical and Chemical Activation on the Removal of Hexavalent Chromium Ions Using Palm Tree Branches

Removal of As(V), Cr(III) and Cr(VI) from aqueous environments by poly(acrylonitril-co-acrylamidopropyl-trimethyl ammonium chloride)-based hydrogels

The potential use of activated carbon prepared from Ziziphus species for removing dyes from waste waters

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