scholarly journals Removal of 4-Chlorophenol from Aqueous Media Using Calixpyrrole Modified Silica

2018 ◽  
Author(s):  
Ismail Abbas ◽  
Bassem El-Hamaoui ◽  
Hilal Njameddine
Keyword(s):  
Aqueous Media ◽  
Modified Silica

scholarly journals Treatment of wastewaters containing acid, reactive and direct dyes using aminosilane functionalized silica

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Monika Wawrzkiewicz ◽  
Zbigniew Hubicki ◽  
Magdalena Nowacka ◽  
Łukasz Klapiszewski
Keyword(s):  
Langmuir Isotherm ◽  
Aqueous Media ◽  
Reactive Black 5 ◽  
Functionalized Silica ◽  
Acid Orange 7 ◽  
Direct Dyes ◽  
Modified Silica ◽  
Direct Blue ◽  
Langmuir Isotherm Model ◽  
Direct Blue 71

AbstractAminosilane modified silica was prepared and investigated for the adsorption of textile dyes such as C.I. Acid Orange 7 (AO7), C.I. Reactive Black 5 (RB5) and C.I. Direct Blue 71 (DB71) from aqueous media and wastewaters. The values of the sorption capacities obtained from the Langmuir isotherm model were: 5.3 mg g

scholarly journals Application of calixpyrrole modified silica for the removal of 4-chlorophenol from aqueous media

2019 ◽  
Vol 10 (2) ◽  
pp. 156-165
Author(s):  
Ismail Ibrahim Abbas ◽  
Bassem Mohamad Riad El Hamaoui ◽  
Hilal Mohamad Jamal Najmeddine
Keyword(s):  
Aqueous Media ◽  
Kinetic Studies ◽  
Extraction Methods ◽  
Gravimetric Analysis ◽  
Modified Silica ◽  
Maximum Sorption Capacity ◽  
Kinetic Coefficients ◽  
Maximum Sorption ◽  
Pseudo Second Order ◽  
Column Extraction

In this research, calixpyrrole modified silica (III) was synthesized and characterized by Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA) and scanning electron microscope (SEM) techniques. The synthesized material was used as an extractant for the removal of 4-chlorophenol from aqueous solution. Its efficiency was examined through both batch and column extraction methods. The effects of temperature, pH, initial chlorophenol concentration and mass of the adsorbent were examined using removal efficiencies. Initial concentration and quantity of adsorbent show a noticeable influence on the uptake capacity of the adsorbent. The kinetics and thermodynamics of chlorophenol removal from aqueous media were also investigated. Kinetic studies indicated that the extraction data can be best represented by pseudo second order model. Column extraction data were analyzed through Thomas, Yoon-Nelson and Yan et al. models to calculate kinetic coefficients and maximum sorption capacity of the modified silica (III). The adsorbent silica was regenerated by acid treatment without changing its properties.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

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