Selective removal and preconcentration of methylene blue from polluted water using cation exchange polymeric material

2018 ◽  
Vol 6 ◽  
pp. 6-13 ◽  
Author(s):  
Medhat Mohamed El-Moselhy ◽  
Soha M. Kamal
Keyword(s):  
Methylene Blue ◽  
Cation Exchange ◽  
Polymeric Material ◽  
Selective Removal ◽  
Polluted Water

Chemisorption of methylene blue by kaolinite

Clay Minerals ◽  
1967 ◽  
Vol 7 (1) ◽  
pp. 19-31 ◽  
Author(s):  
F. A. Faruqi ◽  
Susumu Okuda ◽  
W. O. Williamson
Keyword(s):  
Methylene Blue ◽  
Special Reference ◽  
Cation Exchange ◽  
High Ph ◽  
Inorganic Cations ◽  
Ph Values ◽  
Aqueous Suspensions ◽  
Exchange Site

AbstractThe chemisorption of methylene blue by kaolinite crystals increased as the aqueous suspensions changed from acid to alkaline because, at high pH values, not only the basal pinacoids but the edge-faces were negatively charged. The inability to calculate acceptable specific surfaces or cation exchange capacities from the chemisorption data is discussed, with special reference to the orientation of adsorbed dye cations, the covering of more than one exchange site by a monomer or polymer, the different concentrations of exchange sites on the basal pinacoids and edge-faces respectively, the possibility that such sites occur on the tetrahedral rather than on the octahedral basal pinacoid, and the incomplete replacement of inorganic cations.

scholarly journals Selective removal of lead ions from aqueous solutions using 1,8-dihydroxyanthraquinone (DHAQ) functionalized graphene oxide; isotherm, kinetic and thermodynamic studies

RSC Advances ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 5685-5694 ◽  
Author(s):  
Mohammad Khazaei ◽  
Simin Nasseri ◽  
Mohammad Reza Ganjali ◽  
Mehdi Khoobi ◽  
Ramin Nabizadeh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Aqueous Solutions ◽  
Selective Removal ◽  
Lead Ions ◽  
Polluted Water ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
Thermodynamic Studies ◽  
Kinetic And Thermodynamic Studies ◽  
Efficient Adsorbent

The Fe3O4@DHAQ_GO nanocomposite can serve as an efficient adsorbent for the selective removal of lead from polluted water.

scholarly journals Synthesis and evaluation of the methylene blue removal ability of Cu2O nanoparticles/TiO2 nanotubes heterostructure

2017 ◽  
Vol 1 (T4) ◽  
pp. 115-122
Author(s):  
Viet Van Pham ◽  
Trung Chanh Nguyen ◽  
Hieu Van Le ◽  
Thi Minh Cao
Keyword(s):  
Methylene Blue ◽  
Photoelectron Spectroscopy ◽  
Tio2 Nanotubes ◽  
Polluted Water ◽  
Xps Spectra ◽  
X Ray ◽  
Transmission Electron ◽  
Cu2o Nanoparticles ◽  
Condition Characteristic ◽  
Toxic Organic Substances

Cu2O nanoparticles loaded TiO2 nanotubes (Cu2O/TNTs) were synthesized by photoreduction method for the enhancement of photocatalyst activity of TNTs under sunlight condition. Characteristic properties of these materials were determined by X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM) images and Energy-dispersive X-ray spectroscopy (EDX). XPS spectra confirmed the existence of Cu2O nanoparticles in the sample. The photocatalytic activity of Cu2O/TNTs was evaluated by the survey of the removal of methylene blue (MB) solution under direct sunlight condition. The discoloration of MB solution by Cu2O/TNTs was faster and better than by TNTs after 30 minute – irradiation. The MB removal efficiency of Cu2O/TNTs was up to 89.7 % with the above condition. The results of this study demonstrated that this material for the treatment of the toxic organic substances in the polluted water poses extremely potentials.

scholarly journals Environmentally Friendly Polyvinyl alcohol−alginate/bentonite Nanocomposite Hydrogel Beads as Efficient Adsorbents for Removal of Toxic Methylene Blue from Aqueous Solution

2021 ◽  
Author(s):  
Mona A. Aziz Aljar ◽  
Suad Rashdan ◽  
Ahmed Abd El-Fattah
Keyword(s):  
Methylene Blue ◽  
Polyvinyl Alcohol ◽  
Organic Dyes ◽  
Research Work ◽  
Polluted Water ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Nanocomposite Hydrogel ◽  
Homogeneous Surface ◽  
Hydrogel Beads

Hazardous chemicals like toxic organic dyes are very harmful to the environment and their removal is quite challenging. Therefore there is a necessity to develop techniques, which are environment friendly, cost-effective and easily available in nature for water purification and re-mediation. The present research work is focused on the development` and characterization of the ecofriendly polyvinyl alcohol (PVA) and alginate (Alg) hydrogel beads incorporating natural bentonite (Bent) clay as beneficial adsorbents for removal of toxic methylene blue (MB) from industrial water. PVA−Alg/Bent nanocomposite hydrogel beads with different Bent content (0, 10, 20, and 30 wt%) were synthesized via external ionic gelation method. The designed porous and steady structure beads were characterized by the use of Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX), and scanning electron microscopy (SEM). The performance of the beads as MB adsorbents was investigated by treating batch aqueous solutions. The experimental results indicated that the incorporation of Bent (30 w%) in the nanocomposite formulation sustained porous structure, preserved water uptake, and increased MB removal effi-ciency by 230 % compared to empty beads. Designed beads possessed higher affinity to MB at high pH 8, 30 °C, and fitted well to pseudo-second-order kinetic model a high correlation coefficient. Moreover, designed beads had a good stability and reusability as they exhibited excellent removal efficiency (90%) after six consecutive adsorption-desorption cycles. Adsorption process was found be combination of both monolayer adsorption on homogeneous surface and multilayer adsorption on heterogeneous surface. The maximum adsorption capacity of the designed beads system as calculated by Langmuir isotherm was found to be 51.34 mg/g, which is in good agreement with the reported clay-related adsorbents. The designed PVA−Alg/Bent nanocomposite hydrogel beads demonstrated good adsorbent properties and could be potentially used for MB removal from polluted water.

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