Adsorptive removal of chlorophenols from aqueous solution by low cost adsorbent—Kinetics and isotherm analysis

Radhika, M.; Palanivelu, K.

doi:10.1016/j.jhazmat.2006.05.045

Cited by 226 publications

(123 citation statements)

References 31 publications

(32 reference statements)

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“…It was used the linearised equation of Langmuir. [17][18][19] (3) Q m is the Langmuir constant (L g -1 ) that gives the theoretical adsorption capacity in the monolayer, and K L (L mg -1 ) is a constant related with the adsorption energy. The plot of C e /Q e against C e gives a straight line with interception equals to 1/(K L Q m ) and slope as 1/Q m .…”

Section: Adsorption Equilibriummentioning

confidence: 99%

Fe (ii) adsorption on Ucides Cordatus crab shells

Porpino¹,

Barreto²,

Cambuim³

et al. 2011

Quím. Nova

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Recebido em 13/5/10; aceito em 12/1/11; publicado na web em 29/3/11In this study Ucides cordatus crab shells were utilized as Fe (II) sorbent as material of low cost and simple preparation. Values of pH of standard solution, biosorbent mass, particles size, contact time (t c ) and initial concentration of the standard solution were optimized. The best conditions were pH = 2.00, t c = 840 min and M c = 0.25 g. The kinetic pseudo first-order model displayed the best description of the adsorption process and the equilibrium study showed that the Langmuir model better describes the adsorption of the Fe (II). There is great affinity between the Fe (II) and the biosorbent.

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Section: Adsorption Equilibriummentioning

confidence: 99%

Fe (ii) adsorption on Ucides Cordatus crab shells

Porpino¹,

Barreto²,

Cambuim³

et al. 2011

Quím. Nova

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“…Pollution of surface water by chlorophenols poses risks to the environment and human health, as they can inhibit the normal activities of microbial community and cause death of aquatic life and have carcinogenicity to animals (Radhika and Palanivelu 2006;Wang et al 2007;Liu et al 2010). 2-Chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP) are among the most commonly detected chlorophenols in water (Kadmi et al 2015).…”

Section: Responsible Editor: Philippe Garrigues Submitted To: Environmentioning

confidence: 99%

“…They are also widely used as intermediates in the production of dyes, plastics, pharmaceuticals, pesticides, and insecticides (Radhika and Palanivelu 2006;Anbia and Lashgari 2009;Lua and Jia 2009;Liu et al 2010;Yang et al 2015). In addition, conversion of phenols to chlorophenols could occur during chlorination of drinking water treatment, resulting in a medicinal taste and smell (Anbia and Lashgari 2009;Singh et al 2012;Chen et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Yang

Cheng

2016

Environ Sci Pollut Res

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Sorption of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP), and 2,4,6-trichlorophenol (2,4,6-TCP) on a range of dealuminated zeolites were investigated to understand the mechanism of their sorption on microporous minerals, while the influence of common metal cations, solution pH, and humic acid was also studied. Sorption of chlorophenols was found to increase with the hydrophobicity of the sorbates and that of the microporous minerals, indicating the important role of hydrophobic interactions, while sorption was also stronger in the micropores of narrower sizes because of greater enhancement of the dispersion interactions. The presence of metal cations could enhance chlorophenol sorption due to the additional electrostatic attraction between metal cations exchanged into the mineral micropores and the chlorophenolates, and this effect was apparent on the mineral sorbent with a high density of surface cations (2.62 sites/nm 2 ) in its micropores. Under circum-neutral or acidic conditions, neutral chlorophenol molecules adsorbed into the hydrophobic micropores through displacing the Bloosely bound^water molecules, while their sorption was negligible under moderately alkaline conditions due to electrostatic repulsion between the negatively charged zeolite framework and anionic chlorophenolates. The influence of humic acid on sorption of chlorophenols on dealuminated Y zeolites suggests that its molecules did not block the micropores but created a secondary sorption sites by forming a Bcoating layer^on the external surface of the zeolites. These mechanistic insights could help better understand the interactions of ionizable chlorophenols and metal cations in mineral micropores and guide the selection and design of reusable microporous mineral sorbents for sorptive removal of chlorophenols from aqueous stream.

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“…Chlorophenols are removed from environment by biodegradation [7][8][9], advanced oxidation processes (AOPs) [10][11][12][13][14][15] or adsorption, especially on activated carbon [16][17][18][19][20]. These processes have been applied successfully in water treatment to degradation of 1 Institute of Chemistry, Military University of Technology, ul.…”

Section: Introductionmentioning

confidence: 99%

Influence of Ph on Adsorption Kinetics of Monochlorophenols From Aqueous Solutions on Granular Activated Carbon / Wpływ Ph Na Kinetykę Adsorpcji Monochlorofenoli Z Roztworów Wodnych Na Granulowanym Węglu Aktywnym

Kuśmierek

Świątkowski

2015

Ecological Chemistry and Engineering S

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Adsorptive removal of 2-, 3-and 4-chlorophenol from aqueous solutions by granular activated carbon was studied. The influence of different experimental parameters like initial concentration, carbon dosage and pH on the adsorption of monochlorophenols were evaluated. The influence of type of acid and base used for water acidification or alkalization was also tested. The results indicate that acidic pH is favorable for the adsorption of chlorophenols; however the type of acid or alkali used for the change of pH has a little influence and did not significantly affect the adsorption efficiency. The pH played an important role in the adsorption kinetics of chlorophenols at pH values above the pKa values of the compounds, while little influence on adsorption rate was observed if pH was decreased below the pKa values.

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Adsorptive removal of chlorophenols from aqueous solution by low cost adsorbent—Kinetics and isotherm analysis

Cited by 226 publications

References 31 publications

Fe (ii) adsorption on Ucides Cordatus crab shells

Fe (ii) adsorption on Ucides Cordatus crab shells

Sorption of chlorophenols on microporous minerals: mechanism and influence of metal cations, solution pH, and humic acid

Influence of Ph on Adsorption Kinetics of Monochlorophenols From Aqueous Solutions on Granular Activated Carbon / Wpływ Ph Na Kinetykę Adsorpcji Monochlorofenoli Z Roztworów Wodnych Na Granulowanym Węglu Aktywnym

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