Adsorptive removal of phthalate ester (Di-ethyl phthalate) from aqueous phase by activated carbon: A kinetic study

Mohan, S. Venkata; Shailaja, S.; Krishna, M. Rama; Sarma, P.N.

doi:10.1016/j.jhazmat.2006.12.020

Cited by 118 publications

(40 citation statements)

References 25 publications

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“…Although, chitosan has long chain structure and hydrophilic groups (amino and hydroxyl groups) the higher adsorption capacity was recorded for DBP, instead of DEHP. In fact, adsorption of DEHP was limited by the intraparticle diffusion process, due the size of the molecule (Venkata Mohan et al, 2007). DEHP exhibits a steric hindrance effect, which limited the rate of diffusion on active site of the sorbent.…”

Section: Adsorption Processesmentioning

confidence: 99%

“…The effluent should not contain high concentration of DEHP or others competitive organic molecules, since AOPs are not selective. Moreover, higher chemical consumption and relatively higher treatment cost of these processes, as well as undesired by-products can constitute major barriers to their field application of AOPs (Chen et al, 2007a;Venkata Mohan et al, 2007). By-products are sometimes more toxic than the parent DEHP.…”

Section: Quantitative and Qualitative Comparison Of Wastewater Treatmmentioning

confidence: 99%

See 1 more Smart Citation

Occurrence, fate and effects of Di (2-ethylhexyl) phthalate in wastewater treatment plants: A review

Zolfaghari

Drogui

Seyhi

et al. 2014

Environmental Pollution

163

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Section: Adsorption Processesmentioning

confidence: 99%

Section: Quantitative and Qualitative Comparison Of Wastewater Treatmmentioning

confidence: 99%

Occurrence, fate and effects of Di (2-ethylhexyl) phthalate in wastewater treatment plants: A review

Zolfaghari

Drogui

Seyhi

et al. 2014

Environmental Pollution

163

View full text Add to dashboard Cite

“…Whereas, at higher pHs (8 and 10), the carbon particles are negative and hence reduce the sorption process by electrostatic repulsion. It is also known that an increase in hydroxyl ion at the higher pHs results in the production of aqua-complexes [21,22], which reduces the adsorption capacities of the activated carbon.…”

Section: Effects Of Phmentioning

confidence: 99%

Removal of Steriod Hormones by Activated Carbon Adsorption—Kinetic and Thermodynamic Studies

Ifelebuegu¹

2012

JEP

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The mechanism, isotherms and kinetics of removal of two endocrine disrupting chemicals, 17β-estradiol (E2) and 17α-ethinyloestradiol (EE2) by activated carbon adsorption were investigated in an agitated non-flow batch adsorption studies. Mathematical models were used to describe the adsorption phenomenon with the kinetic and thermodynamic parameters evaluated using the adsorption equilibrium data at varying temperatures. Higher adsorption rates were achieved at acidic to neutral pH ranges, with the sorption kinetic data showing a good fit to the pseudo second order rate equation and the Langmuir adsorption isotherm model for both E2 and EE2. The Gibbs free energy were -16.68 kJ/mol and -17.34 kJ/mol for E2 and EE2 respectively. The values of enthalpy for both E2 (84.50 kJ/mol) and EE2 (90 kJ/mol) indicated a chemical nature of the sorption process. Both the isotherm and thermodynamic data obtained all supported the mechanism of adsorption of E2 and EE2 to be mainly chemisorptions supported by some physical attractions.

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“…The pure AC carbon structure is non-polar and accordingly, ACs have shown high adsorption capacity for many types of non-polar or slightly polar organic compounds, including phenolic compounds (Liu et al 3 2010), pesticides, PCBs (Sotelo et al 2002), phthalates (Venkata Mohan et al 2007), and PAHs (Valderrama et al 2008). The hydrophilicity of ACs can be increased by the presence of polar surface functional groups, and the surface chemistry can be modified to enhance selectivity of specific chemicals.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

Björklund

2017

Journal of Environmental Management

127

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Adsorption filters have the potential to retain suspended pollutants physically, as well as attracting and chemically attaching dissolved compounds onto the adsorbent. This study investigated the adsorption of eight hydrophobic organic compounds (HOCs) frequently detected in stormwater -including four polycyclic aromatic hydrocarbons (PAHs), two phthalates and two alkylphenols -onto activated carbon produced from domestic sewage sludge. Adsorption was studied using batch tests. Kinetic studies indicated that bulk adsorption of HOCs occurred within 10 min. Sludge-based activated carbon was as efficient as tested commercial carbons for adsorbing HOCs; adsorption capacities ranged from 70 to 2800 µg/g (Cinitial=10-300 µg/L; 15 mg SBAC in 150 mL solution; 24 h contact time) for each HOC. In the batch tests, the adsorption capacity was generally negatively correlated to the compounds' hydrophobicity (log Kow) and positively associated with decreasing molecule size, suggesting that molecular sieving limited adsorption. However, in repeated adsorption tests, where competition between HOCs was more likely to occur, adsorbed pollutant loads exhibited strong positive correlation with log Kow. Sewage sludge as a carbon source for activated carbon has great potential as a sustainable alternative for sludge waste management practices and production of a high-capacity adsorption material.

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Adsorptive removal of phthalate ester (Di-ethyl phthalate) from aqueous phase by activated carbon: A kinetic study

Cited by 118 publications

References 25 publications

Occurrence, fate and effects of Di (2-ethylhexyl) phthalate in wastewater treatment plants: A review

Occurrence, fate and effects of Di (2-ethylhexyl) phthalate in wastewater treatment plants: A review

Removal of Steriod Hormones by Activated Carbon Adsorption—Kinetic and Thermodynamic Studies

Adsorption of organic stormwater pollutants onto activated carbon from sewage sludge

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