Competitive adsorption of arsenic and mercury on nano-magnetic activated carbons derived from hazelnut shell

Activated carbons (ACs) based on apricot shells (AS), wood (W), and walnut shells (WS) were applied to adsorb atrazine in co-solutions. To study the effect of Bisphenol A (BPA) on the adsorption behavior of atrazine, the adsorption performance of ACs for BPA in single solution was studied. The results demonstrated that the adsorption kinetics of BPA fitted the pseudo-second-order model, the adsorption isotherms of BPA followed the Langmuir model. Meanwhile, the adsorption kinetics of atrazine fitted the pseudo-second-order kinetics model and the isotherm was consistent with the Freundlich model both in single solution and co-solution. In addition, competitive adsorption was observed when atrazine coexisted with BPA or humic acid. For the adsorption capacity, the adsorption amount of ASAC, WAC, and WSAC for atrazine obviously decreased by 18.0%, 30.0%, and 30.3% in the presence of BPA, respectively, which was due to the π−π interactions, hydrophobic interactions, and H-bonds, resulting in the competitive adsorption between atrazine and BPA. This study contributes to the further understanding of the adsorption behavior for atrazine in co-solution.

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Desulfurization of diesel fuels by selective adsorption on activated carbons: Competitive adsorption of polycyclic aromatic sulfur heterocycles and polycyclic aromatic hydrocarbons

Chemical Engineering Journal ◽

10.1016/j.cej.2010.10.063 ◽

2011 ◽

Vol 166 (1) ◽

pp. 207-217 ◽

Cited By ~ 118

Author(s):

Jie Bu ◽

Gabriel Loh ◽

Chuandayani Gunawan Gwie ◽

Silvia Dewiyanti ◽

Michael Tasrif ◽

...

Keyword(s):

Polycyclic Aromatic Hydrocarbons ◽

Aromatic Hydrocarbons ◽

Competitive Adsorption ◽

Activated Carbons ◽

Selective Adsorption ◽

Diesel Fuels ◽

Polycyclic Aromatic Sulfur Heterocycles ◽

Polycyclic Aromatic ◽

Sulfur Heterocycles

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Equilibrium, isotherm, kinetic and thermodynamic studies for removal of tetracycline antibiotics by adsorption onto hazelnut shell derived activated carbons from aqueous media

RSC Advances ◽

10.1039/c6ra23346e ◽

2016 ◽

Vol 6 (111) ◽

pp. 109983-109991 ◽

Cited By ~ 32

Author(s):

Hong-Tao Fan ◽

Li-Qi Shi ◽

Hua Shen ◽

Xi Chen ◽

Kun-Peng Xie

Keyword(s):

Phosphoric Acid ◽

Activated Carbons ◽

Agricultural Waste ◽

Aqueous Media ◽

Acid Activation ◽

Equilibrium Isotherm ◽

Tetracycline Antibiotics ◽

Phosphoric Acid Activation ◽

Hazelnut Shell ◽

Kinetic And Thermodynamic Studies

Hazelnut shell, an agricultural waste, was used to prepare activated carbons by phosphoric acid activation.

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Ni(II) and Cd(II) Simple and Competitive Adsorption on Activated Carbon Oxidized. Influence of the Oxidant Agents HO and NaClO

The Open Materials Science Journal ◽

10.2174/1874088x01509010020 ◽

2015 ◽

Vol 9 (1) ◽

pp. 20-27

Author(s):

Miguel A. Sánchez ◽

Paola Rodríguez-Estupiñan ◽

Liliana Giraldo ◽

Juan Carlos Moreno-Piraján

Keyword(s):

Activated Carbon ◽

Surface Area ◽

Adsorption Isotherms ◽

Competitive Adsorption ◽

Gas Adsorption ◽

Activated Carbons ◽

Bet Surface Area ◽

Textural Parameters ◽

Chemical Groups ◽

Langmuir And Freundlich Models

In this study, granular activated carbon, GAC, was modified by oxidation with HO and NaClO aqueous solutions and heat treatment at 900°C. The N adsorption isotherms at − 196°C and SEM and FTIR results were used to characterize the properties of the prepared ACs. Textural parameters such as BET surface area and pore volumes were assessed by gas adsorption. The BET surface area values of solids were between 687 and 876 m2g-1. Additionally, immersion enthalpies of activated carbons in benzene, water, hydrochloric acid and sodium hydroxide solutions and Ni(II) and Cd(II) solutions of 500 mgL were determined, with values between 32 and 145 Jg-1. Ni(II) and Cd(II) adsorption isotherms were determined at pH 6 on activated carbons and competitive adsorption tests were realized between the two ions. The results show that in the tests carried out, the adsorption capacity decreased when the content of chemical groups on the surface also decreased. Finally, the experimental results of adsorption from the solution were adjusted to the Langmuir and Freundlich models and the first model was found to be better. With maximum adsorption capacities, the values for Ni(II) were between 3.99 and 64.9 mgg-1 and for Cd(II) were between 2.61 and 55.2 mgg-1. The values of the competitive adsorption ions present in the solution, Ni(II) and Cd(II), in the activated carbons, decreased compared to those obtained in the simple adsorption, indicating the effect of the an ion competitive presence in adsorption another.

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