Determination of adsorptive properties of expanded vermiculite for the removal of C. I. Basic Red 9 from aqueous solution: Kinetic, isotherm and thermodynamic studies

Duman, Osman; Tunç, Sibel; Polat, Tülin Gürkan

doi:10.1016/j.clay.2015.03.003

Cited by 186 publications

(52 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Vermiculite is abundant and cheaper when compared with other clays. Due to its outstanding characteristics, vermiculite is commonly used in agriculture, in industrial and environmental applications . It can also be subjected to modifications with the objective to increase efficiency in the remotion of polluents from residual water …”

Section: Introductionmentioning

confidence: 99%

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Escócio

Visconte

Nazareth

et al. 2018

Macromolecular Symposia

View full text Add to dashboard Cite

In this study, two types of composites, both with the same polymeric matrix, high density polyethylene (HDPE) from renewable sources, also called green HDPE, are investigated. The mineral fillers insert into HDPE are vermiculite and titanium dioxide (TIO2). The objective of this work is the evaluation of two inorganic fillers in the HDPE composites and how their presence alters the properties of this HDPE derive from sugar cane ethanol. Composites obtain by extrusion with different contents of anatase type titanium dioxide (10–30 wt%/wt) and brazilian vermiculite (5–20 wt%/wt) are evaluated as for mechanical and morphological properties, melt flow index (MFI), and permeability. The addition of fillers cause little influence on tensile strength, but increased the elasticity modulus and decreased impact strength. in relation to morphology, it is found that particles of TIO2 are well dispersed in the HDPE matrix. For composites with vermiculite, its distribution in the polymer matrix is not so good as compared with composites of TIO2, especially in proportions higher than 10 wt%. The results of MFI show that by adding vermiculite the fluidity of polyethylene does not change, but the addition of TIO2 promotes a reduction in fluidity thus suggesting that a good dispersion has been achieved. Permeability increases on the addition of the two fillers, being more pronounced at high amounts (20% vermiculite and 30% TIO2). The analyzed properties, the addition of these fillers does not interfere negatively the properties of the green HDPE and can be considered an alternative toward low cost composites.

show abstract

Section: Introductionmentioning

confidence: 99%

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Escócio

Visconte

Nazareth

et al. 2018

Macromolecular Symposia

View full text Add to dashboard Cite

show abstract

“…Among many methods of removing dye from wastewater, adsorption technique on a solid support is considered as the most versatile, comparatively green physical method and now widely used because of low cost, low sensitivity to toxic substances, and easy operation . Until now, a variety of commercial materials like activated carbon, silica, MgO, TiO 2 , SnS 2 , graphene oxide, organic polymer, metal‐organic hybrid composites, and clays including sepiolite, vermiculite, magnetic multi‐walled carbon nanotubes and magnetic multi‐walled carbon nanotube/polysaccharide nanocomposites, have been used as adsorbent materials for the removal of dyes from wastewater. Some of them possessed high adsorption capacity but had limitations in the area of poor recyclability, expensive nature, and poor dispersion stability.…”

Section: Introductionmentioning

confidence: 99%

Epoxide functionalized γ‐Al₂O₃/Fe₃O₄/SiO₂ nanocomposite and comparative adsorption behavior of a model reactive azo dye

Bristy

Rahman²,

Rahman

et al. 2018

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this investigation, magnetic γ‐Al2O3 nanocomposite polymer particles with epoxide functionality were prepared following a multistep process. The prepared nanocomposite polymer particle was named as γ‐Al2O3/Fe3O4/SiO2/poly(glycidyl methacrylate (PGMA). The surface property was evaluated by carrying out the adsorption study of Remazol Navy RGB (RN), a model reactive azo dye, on both γ‐Al2O3/Fe3O4/SiO2 and γ‐Al2O3/Fe3O4/SiO2/PGMA nanocomposite particles, that is, before and after epoxide functionalization. A contact time, temperature, adsorbent dose, and dye concentration dependent change in adsorption behavior was observed on both nanocomposite particles. The adsorption amount reached equilibrium (qe) value within 5 minutes at the respective point of zero charge (PZC). The adsorption density of RN per unit specific surface area on epoxide functional γ‐Al2O3/Fe3O4/SiO2/PGMA nanocomposite polymer particles (1.30 mg/m2) was higher relative to that on γ‐Al2O3/Fe3O4/SiO2 nanocomposite particles (0.87 mg/m2). The optimum adsorbent dose for obtaining the maximum adsorption density was 0.01 g. Comparatively, Langmuir isotherm model was better to describe the adsorption process and the adsorption process was favorable at low temperature (283 K). Batch kinetic adsorption experiment suggested that a pseudo‐second‐order rate kinetic model is more appropriate. Nanocomposite polymer particles were used as adsorbent up to third cycle with almost 99% adsorption efficiency.

show abstract

“…Thus far, different techniques, such as ion exchange, coagulation/flocculation, adsorption, and membrane filtration, have been successfully developed and applied for the removal of dyes in dye‐containing wastewater . The adsorption process is one of the most reliable alternatives for the removal of dyes from wastewater because of its high efficiency, ease of operation, and the availability of many adsorbents . Nevertheless, it has some disadvantages, such as high cost and the loss of adsorption efficiency after regeneration .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of an inorganic‐framework molecularly imprinted Fe‐doped TiO₂ composite and its selective photo‐Fenton‐like degradation of acid orange II

Song

Rong

Shang

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND The heterogeneous photo‐Fenton‐like process is emerging as a promising treatment of dye‐containing wastewater because of its economic feasibility and high efficiency. However, it is still required to develop photo‐Fenton‐like catalysts with highly selective degradation ability and reusability. RESULTS Inorganic‐framework molecularly imprinted Fe‐doped TiO2 composites (MIP/Fe–TiO2) were successfully prepared by the sol–gel method, with acid orange II as the template and TiO2 as the matrix material. The photo‐Fenton‐like catalysts were characterized using FESEM, EDS, BET, X‐ray diffraction, FT‐IR spectroscopy and UV–vis diffuse reflectance spectroscopy. These methods revealed the well‐crystallized anatase phase and good nanometer‐level particle sizes. The adsorption property and photo‐Fenton‐like activity of the catalysts were also studied in single and binary systems, respectively. CONCLUSIONS Compared with non‐imprinted Fe–TiO2 composites (NIP/Fe–TiO2), MIP/Fe–TiO2 showed higher adsorption capacity and selectivity toward the template molecule. In addition, it was found that the molecular recognition ability of MIP/Fe–TiO2 provided the catalysts with rapidly selective photo‐Fenton‐like degradation of low target pollutant levels (20 mg L−1) in the presence of high levels of interferential pollutant sodium dodecyl benzene sulfonate (100 mg L−1). Moreover, because of the stable physicochemical properties of the inorganic framework, the new photo‐Fenton‐like catalysts were resistant to photochemical attack and showed favorable reusability. © 2017 Society of Chemical Industry

show abstract

Determination of adsorptive properties of expanded vermiculite for the removal of C. I. Basic Red 9 from aqueous solution: Kinetic, isotherm and thermodynamic studies

Cited by 186 publications

References 70 publications

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Epoxide functionalized γ‐Al₂O₃/Fe₃O₄/SiO₂ nanocomposite and comparative adsorption behavior of a model reactive azo dye

Synthesis of an inorganic‐framework molecularly imprinted Fe‐doped TiO₂ composite and its selective photo‐Fenton‐like degradation of acid orange II

Contact Info

Product

Resources

About

Determination of adsorptive properties of expanded vermiculite for the removal of C. I. Basic Red 9 from aqueous solution: Kinetic, isotherm and thermodynamic studies

Cited by 186 publications

References 70 publications

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Permeability, Melt Flow Index, Mechanical, and Morphological Properties of Green HDPE Composites: Effect of Mineral Fillers

Epoxide functionalized γ‐Al2O3/Fe3O4/SiO2 nanocomposite and comparative adsorption behavior of a model reactive azo dye

Synthesis of an inorganic‐framework molecularly imprinted Fe‐doped TiO2 composite and its selective photo‐Fenton‐like degradation of acid orange II

Contact Info

Product

Resources

About

Epoxide functionalized γ‐Al₂O₃/Fe₃O₄/SiO₂ nanocomposite and comparative adsorption behavior of a model reactive azo dye

Synthesis of an inorganic‐framework molecularly imprinted Fe‐doped TiO₂ composite and its selective photo‐Fenton‐like degradation of acid orange II