Role of tailored surface of activated carbon for adsorption of ionic liquids for environmental remediation

Hassan, Syed Zulqadar; Yasin, Tariq

doi:10.1007/s13762-014-0678-9

Cited by 14 publications

(7 citation statements)

References 58 publications

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“…Following Equation 2, it is hypothesised that the formation of oxygen groups at the GAC surface caused by HOCl pre-treatment (Snoeyink et al, 1974) enhances the conversion of monochloramine to N 2 as more surface oxides are formed. It has been shown previously that oxidation by HOCl also leads to the formation of mostly the same types of surface oxides (carboxylic and hydroxylic groups) (Hassan and Yasin, 2015) compared to those found in this study formed from oxidation by monochloramine.…”

Section: Impact Of Hocl Pre-treatment On the N 2 Yieldsupporting

confidence: 86%

N2 yields from monochloramine conversion by granular activated carbons are decisive for effective swimming pool water treatment

2019

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Inorganic chloramines (mono-, di-and trichloramine) are formed in swimming pool water from the unintended reaction of free chlorine with ammonia that is introduced by bathers. Monochloramine is of particular interest as it is known to react further in pool water forming harmful DBPs, such carcinogenic N-nitrosodimethylamine (NDMA). During pool water treatment with granular activated carbon (GAC) filters, monochloramine is transformed by chemical reactions on the carbon surface to N 2 and ammonia. As ammonia is led back into the pool where it is chlorinated again under the renewed formation of inorganic chloramines, it is recommended to use GACs with a high N 2 yield for monochloramine transformation in pool water treatment.In this study, yields of N 2 and ammonia from monochloramine conversion by commercially available GACs were determined using a fixed-bed reactor system under conditions that are typical for swimming pool water treatment. The N 2 yields remained constant with on-going exposure of the GAC to monochloramine and ranged from 0.5% to 21.3%, depending on the type of GAC used. Correlation analyses were conducted to identify carbon properties that can determine the N 2 yield for monochloramine conversion, such as the amount of oxygen groups, the elemental composition and the trace metal content. It was found that the N 2 yield significantly correlates with the copper content of the tested carbons.Model calculations combining pool hydraulics with formation/abatement of inorganic chloramines and NDMA as well as chloramine transformations in GAC filters showed that the concentration of inorganic chloramines and carcinogenic NDMA can be

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Section: Impact Of Hocl Pre-treatment On the N 2 Yieldsupporting

confidence: 86%

N2 yields from monochloramine conversion by granular activated carbons are decisive for effective swimming pool water treatment

2019

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“…phenomena and produces a significant effect on the equilibrium parameters of the interphase boundary and the rate of electrochemical processes [51][52][53]. Recently, much attention has been dedicated to adsorption of halide anions because the presence of specifically adsorbing halide anions leads to the increase of interfacial capacitance and, therefore, the energy density of supercapacitors [24,46,47].…”

Section: Ils On Carbon Materials Plays An Important Role In Various Ementioning

confidence: 99%

Density Functional Theory Study of Ionic Liquid Adsorption on Circumcoronene Shaped Graphene

et al. 2018

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Carbon materials have a range of properties such as high electrical conductivity, high specific surface area, and mechanical flexibility are relevant for electrochemical applications. Carbon materials are utilised in energy conversion-and-storage devices along with electrolytes of complementary properties. In this work, we study the interaction of highly concentrated electrolytes (ionic liquids) at a model carbon surface (circumcoronene) using density functional theory methods. Our results indicate the decisive role of the dispersion interactions that noticeably strengthen the circumcoronene-ion interaction. Also, we focus on the adsorption of halide anions as the electrolytes containing these ions are promising for practical use in supercapacitors and solar cells.

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“…The IPD model was used to explain either the boundary layer diffusion or IPD during the adsorption processes (Cheung et al 2007;Hassan and Yasin 2015). The equation can be expressed as follows (Singh et al 2012):…”

Section: Kinetic Modelsmentioning

confidence: 99%

Removal of sulfamethazine antibiotics using cow manure-based carbon adsorbents

Tzeng

Liu

Deng

et al. 2016

Int. J. Environ. Sci. Technol.

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Low-cost adsorbents, e.g., cow manure-based carbon, provide alternatives to remove veterinary antibiotic sulfamethazine (SMT) from contaminated water bodies. In this study, the chemical structures and compositions of cow manure (CM) carbonized at 400, 600, and 800°C (CM400, CM600, and CM800) were examined using elemental analyzer (EA), Brunauer-Emmett-Teller, and spectroscopic techniques. Adsorptions of SMT on CM samples were conducted as functions of pH, hydrophobicity, and ionic strengths. Results of EA and spectroscopic analyses suggested that the raw CM and CM400 samples contained the highest amounts of O-containing groups and aliphatic domains. Amounts of such two chemical groups decreased as carbonization temperatures increased. The specific surface areas and total pore volumes of CM samples increased significantly when the carbonization temperatures exceeded 600°C. SMT adsorption on CM samples could be described essentially by the pseudo-second-order kinetic, intra-particle diffusion, and Freundlich isotherm models. Low pH and ionic strength were favorable for SMT adsorption in CM samples, particularly for the CM800, because a strong p ? -p electron donor-acceptor interaction (p ? -p EDA) was formed between SMT and CM surfaces enriched with hydrophobic domains. Further, the high adsorption affinity of SMT to the CM600 and CM800 samples was attributed in part to their larger surface areas and total pore volumes. Generally, CM-based materials carbonized [600°C showed relatively stable structures and exhibited strong aromatic properties. Moreover, maximum adsorption capacities of SMT on the CM800 sample (37-39 mM/kg) were significantly higher than those of other common adsorbents (0.02-35.93 mM/kg).

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Role of tailored surface of activated carbon for adsorption of ionic liquids for environmental remediation

Cited by 14 publications

References 58 publications

N2 yields from monochloramine conversion by granular activated carbons are decisive for effective swimming pool water treatment

N2 yields from monochloramine conversion by granular activated carbons are decisive for effective swimming pool water treatment

Density Functional Theory Study of Ionic Liquid Adsorption on Circumcoronene Shaped Graphene

Removal of sulfamethazine antibiotics using cow manure-based carbon adsorbents

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