Efficiency of Cd(II) removal from aqueous media using chemically modified polystyrene foam

2008 ◽  
Vol 44 (5) ◽  
pp. 1501-1511 ◽  
Author(s):  
Jamil R. Memon ◽  
Saima Q. Memon ◽  
M.I. Bhanger ◽  
M.Y. Khuhawar ◽  
Geoffrey C. Allen ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Polystyrene Foam ◽  
Chemically Modified ◽  
Modified Polystyrene

Sulphate-selective optical microsensors: overcoming the hydration energy penalty

2015 ◽  
Vol 51 (52) ◽  
pp. 10377-10380 ◽  
Author(s):  
Tomàs Guinovart ◽  
Pascal Blondeau ◽  
Francisco J. Andrade
Keyword(s):  
Optical Detection ◽  
Aqueous Media ◽  
Hydration Energy ◽  
Polystyrene Microspheres ◽  
Chemically Modified ◽  
Energy Penalty ◽  
Modified Polystyrene

Novel membrane-free chemically modified polystyrene microspheres for the optical detection of sulphate in aqueous media are introduced.

scholarly journals Removal of Acidic Dyes from Aqueous Media Using Citrullus Lanatus Peels: An Agrowaste-Based Adsorbent for Environmental Safety

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Shoomaila Latif ◽  
Rabia Rehman ◽  
Muhammad Imran ◽  
Shahid Iqbal ◽  
Ayesha Kanwal ◽  
...  
Keyword(s):  
Citrullus Lanatus ◽  
Aqueous Media ◽  
Sorption Isotherms ◽  
Environmental Safety ◽  
Agitation Speed ◽  
Batch Mode ◽  
Sorption Data ◽  
Chemically Modified ◽  
Bulk Scale ◽  
Water Melon

In this work, removal of fluorescein and eosin dyes using common agrowaste, i.e., peels of water melon (Citrullus lanatus) (WMP), has been studied in the batch mode. The sorbent material (WMP) was characterized by using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. The sorbent was chemically modified by subjecting it to 0.1 N HNO3 and 0.1 N NaOH solutions. Different parameters such as sorbent dose, pH, temperature, and agitation speed were optimized to investigate the sorbent efficiency for fluorescein and eosin dyes. Among three forms (raw, base-treated, and acid-treated), the base-treated form exhibited higher removal efficiency, followed by acid-treated and then the raw form. Generally, range for the removal of fluorescein and eosin was found to be 48.06–88.08% and 48.47–79.31%, respectively. Mathematical modeling of sorption data by Langmuir and Freundlich sorption isotherms and thermodynamic investigations were carried out to check the suitability of these agrowaste materials on bulk scale. The promising results concluded that peel of water melon (common agrowaste) can be potentially utilized for the removal of toxins.

Functionalization of Cellulose with Cysteamine: Synthesis, Characterization, and Adsorption

2016 ◽  
Vol 869 ◽  
pp. 740-744 ◽  
Author(s):  
Roosevelt Delano Sousa Bezerra ◽  
Mateus Soares Silva ◽  
Francisco José Lustosa Ferreira ◽  
Lucinaldo Santos Silva ◽  
Josy Anteveli Osajima ◽  
...  
Keyword(s):  
Adsorption Isotherm ◽  
Elemental Analysis ◽  
Linear Models ◽  
Aqueous Media ◽  
Copper Ion ◽  
Langmuir Model ◽  
Experimental Adsorption ◽  
Chemically Modified ◽  
Experimental Adsorption Isotherm ◽  
The One

The cellulose matrix was chemically modified with cysteamine (CelCTA) and characterized by elemental analysis, and subsequently applied to the removal of copper ion in an aqueous media. The experimental adsorption isotherm obtained for the studied system was adjusted to linear models: Langmuir, Freundlich, and Temkin. Among the proposed models, the Langmuir model was the one with the best linear adjustment to data obtainedexperimentally, with an adsorption capacity of the adsorbent for 0.3292 mmol dm-3.

Adsorption of cadmium(ii) from aqueous media onto a mesoporous silica chemically modified with 2-mercaptopyrimidine

2006 ◽  
Vol 16 (18) ◽  
pp. 1757-1764 ◽  
Author(s):  
Damián Pérez-Quintanilla ◽  
Isabel del Hierro ◽  
Mariano Fajardo ◽  
Isabel Sierra
Keyword(s):  
Mesoporous Silica ◽  
Aqueous Media ◽  
Chemically Modified

scholarly journals Application of the Natural Cellulosic Supports for the Treatment of the Industrial Effluents

2021 ◽  
Vol 44 (3) ◽  
pp. 48-55
Author(s):  
Andreea BONDAREV
Keyword(s):  
Aqueous Solutions ◽  
Crystal Violet ◽  
Dye Removal ◽  
Agricultural Waste ◽  
Beech Wood ◽  
Aqueous Media ◽  
Industrial Effluents ◽  
Chemically Modified ◽  
Wood Sawdust ◽  
Crystal Violet Dye

Wastewater treatment is one of the most important concerns of the research studies in the field of environmental protection. The current study relates to the removal of Crystal violet dye from aqueous solutions through adsorption experiments onto natural cellulosic supports. Various waste materials that have in their composition lignocellulose are adsorbent supports with low costs for the removal of heavy metal ions and dyes from aqueous solutions. The use of chemically modified sawdust to obtain an inexpensive adsorbent for removing the Crystal violet dye (CV) from synthetic aqueous solutions has been presented in this research paper. The influence of some important parameters such as: initial dye concentration, adsorbent dose, contact time and temperature on adsorption efficiency for this dye removal have been studied. The Freundlich, Langmuir and Temkin mathematical models have been used to evaluate the data of Crystal violet adsorption from aqueous media using wood sawdust. The research study shows that beech wood sawdust (Fagus sylvatica), as an agricultural waste which is readily available and relatively inexpensive has the potential to be an applicable alternative adsorbent for Crystal violet dye removal from industrial effluents.

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