Synthesis, Adsorption Behavior of a Maleamic Acid Cross-Linked β- Cyclodextrin Polymer for Removal of Basic Fuchsin in Aqueous Solution

2014 ◽  
Vol 937 ◽  
pp. 9-16
Author(s):  
Xiao Mei Zhang ◽  
Hong Zhan Li ◽  
Man Li Cao ◽  
Chao Yue Chen
Keyword(s):  
Aqueous Solution ◽  
Adsorption Behavior ◽  
Basic Fuchsin ◽  
Order Model ◽  
Kinetics Of Adsorption ◽  
Langmuir Adsorption ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Maleamic Acid ◽  
Kinetics Of

A crosslinked β-cyclodextrin (β-CD) polymer (PCD) was synthesized by using maleamic acid as a crosslinked agent, and its adsorption behavior for basic fuchsin in aqueous solution was investigated. The adsorption isotherms could be well fitted by the Langmuir adsorption equation. On the basis of the Langmuir analysis, the maximum adsorption capacities were determined to be 33.56 mg·g-1 at 308K. The kinetics of adsorption followed the pseudo-second-order model.

scholarly journals Adsorption of Thymol onto Natural Clays of Morocco: Kinetic and Isotherm Studies

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Hamid Ziyat ◽  
Mohammed Naciri Bennani ◽  
Hassan Hajjaj ◽  
Omar Qabaqous ◽  
Said Arhzaf ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
X Ray Diffraction ◽  
Order Model ◽  
Freundlich Model ◽  
Kinetics Of Adsorption ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Natural Clays ◽  
Uv Visible ◽  
Kinetics Of

The present work aims to study the affinity of a component of the thyme essential oil “thymol” to natural Moroccan clay “Rhassoul” using the adsorption technique. The physicochemical characterizations of the purified and modified clay were carried out by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), DTA/TGA, and SEM-EDX. Thymol adsorption tests on the purified Rhassoul (Rh-P) and the modified one by CTAB (Rh-CTAB) were followed by UV-visible spectroscopy. They show that the adsorption isotherms can be described by the Freundlich model and that the kinetics of adsorption is in accordance with the pseudo-second-order model for the two clays. Adsorption capacities obtained were of the order of 6 mg/g for the purified Rhassoul and 16 mg/g for the modified Rhassoul by cetyltrimethylammonium bromide (CTAB). These values show that the modified Rhassoul has a better adsorption capacity compared to the purified Rhassoul.

Adsorption Characters of Mn2+ onto Palygorskites Modified by 1, 10-Phenanthroline and Triethylamine

2010 ◽  
Vol 178 ◽  
pp. 8-16
Author(s):  
Liang Dong Feng ◽  
Bo Qing Chen ◽  
Ying Ying Shi ◽  
Ying Wei Guo ◽  
Jing Huang ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Ph Value ◽  
Order Model ◽  
Kinetics Of Adsorption ◽  
Initial Concentration ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Kinetics Of

1, 10-phenanthroline and triethylamine modified palygorskites were prepared by microwave irradiation, and characterized with FT-IR technique. The effects of contact time, adsorbent dosage, and pH value of the initial solution on the adsorption characters of Mn2+ were investigated. The adsorption of Mn2+ from aqueous solutions using 1, 10-phenanthroline or triethylamine modified palygorskites were investigated. Experiment results indicated that 1,10-phenanthroline and triethylamine molecules have been successfully grafted to palygorskite. The adsorption was rapid during the first 5 minuts and equilibrium were attained within 60 minutes in the initial concentration of Mn2+ of 50 and 100 mg•L-1, and fast adsorption in the first 10 minutes and slowly increased with the contact time due to the adsorption of palygorskite. The 1, 10-phenanthroline modified palygorskites had higher adsorption capacity than triethylamine modified palygorskites. Compared with natural palggorskites, the Mn2+ ions adsorption capacities of palggorskite modified by 1, 10-phenanthroline or triethylamine were significantly improved. There were less difference in the adsorption capacity between different dasages of 1, 10-phenanthroline modified palygorskites, but the adsorption capacity of Mn2+ adsorbed onto triethylamine modified palygorskites decreased with increasing the dosages. A Lagergren pseudo-second order model best described the kinetics of adsorption of Mn2+ onto the modified palygorskites.

scholarly journals Study of the adsorption capacity of Fe(II) dissolved in water by using a mineral rich in Manganese Dioxide (MnO2) from Colombia

DYNA ◽  
2016 ◽  
Vol 83 (196) ◽  
pp. 223-228 ◽  
Author(s):  
Jhonnathan Machado-Infante ◽  
Gustavo Ramírez-Caballero ◽  
Martha Juliana Barajas Meneses
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Water Treatment ◽  
Adsorption Capacity ◽  
Open Systems ◽  
Kinetics Of Adsorption ◽  
Equilibrium And Kinetics ◽  
Pseudo Second Order ◽  
Potential Alternative ◽  
Kinetics Of

<p>In Colombia, a mineral rich in MnO<sub>2</sub> is extracted from the mines of Mallama, Nariño. In this work we studied the adsorption capacity of this mineral for Fe(II) dissolved in aqueous solution of open systems. The characterization was done through ICP-AES, XRF and Raman spectroscopy. The effect of different pretreatments on the mineral with oxidizing agents such as KMnO<sub>4</sub> and NaClO was evaluated. Studies of equilibrium and kinetics of adsorption showed that the mechanism fits well to the Langmuir isotherm and its kinetics to a model of pseudo-second order. At the conditions studied was found that the adsorption capacity for the mineral modified with KMnO<sub>4</sub> and NaOCl were 59.209 and 51.279 mg/g respectively. It is concluded that the mineral is a potential alternative in water treatment.</p>

scholarly journals Kinetics of Adsorptive Removal of Drimarene Brilliant Red from Aqueous Solution Using Untreated Agricultural Residues

2016 ◽  
Vol 59 (1) ◽  
pp. 11-22
Author(s):  
Ch. Tahir Mehmood ◽  
Muhammad Arshad ◽  
Tayyab Ashfaq ◽  
Muhammad Bilal ◽  
Muhammad Shafiq ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Analytical Data ◽  
Particle Sizes ◽  
Order Model ◽  
Orange Peels ◽  
Pseudo Second Order ◽  
Initial Adsorption ◽  
Kinetics Of ◽  
Solution Kinetics

The potential of untreated banana and orange peels, and rice husk was tested for drimarenebrilliant red (DBR) dye removal from aqueous solution. Kinetics was also studied in a batch experiment.Dose of adsorbents varied from 6 to 12 g/L, particle sizes 0.2 and 0.8 mm and contact time 2–32 h. Highdose and small particle size favoured DBR removal efficiency significantly. The highest adsorption capacitywas shown by rice husk (10 mg/g), then orange peels (9 mg/g) and the lowest by banana peels (4 mg/g).Langmuir isotherm (R2=0.99) and pseudo-second order model (R2=0.99) depicted well the equilibriumand best explained the kinetics for rice husk, respectively. Initial adsorption appeared as pore diffusionin all the cases and film diffusion was controlling the rate, later on. Based upon the analytical data, a simplemodel has been presented that fitted best to describe rice husk adsorption kinetics.

The Adsorption Behavior of Reactive Dye on Magnetic Chitosan Coated Cotton Fibers

2011 ◽  
Vol 396-398 ◽  
pp. 2198-2201
Author(s):  
Xue Mei He ◽  
Kong Liang Xie
Keyword(s):  
Aqueous Solution ◽  
Crosslinking Agent ◽  
Reactive Dye ◽  
Adsorption Behavior ◽  
Experimental Conditions ◽  
Magnetic Chitosan ◽  
Pseudo Second Order ◽  
Basic Solutions ◽  
Kinetics Of ◽  
Coated Cotton

A new composite magnetic chitosan coated cotton (MSCC) fiber with 3-glycidyloxypropyltrimethoxysilane (GPTMS) as a crosslinking agent was prepared for the adsorption of C.I. Reactive red 194 from aqueous solution. The structure and morphology of MSCC fibers were analyzed by FTIR and SEM. The adsorption behavior of C.I. Reactive red 194 from aqueous solution onto MSCC fibers was investigated under various experimental conditions such as initial concentration of the dyes, temperature, pH and adsorb time. Experimental data indicated that the adsorption capacity of MSCC fibers on C.I. Reactive red 194 was higher in acidic rather than in basic solutions. A rise of temperature accelerates mass transfer of dyes into the MSCC fibers. The kinetics of the interactions was best described by pseudo-second-order mechanism.

Preparation and its Adsorption Characters of Pb2+ Ions-Imprinted Chitosan/Palygorskite Hybrid Materials

2011 ◽  
Vol 391-392 ◽  
pp. 1324-1329
Author(s):  
Ying Ying Shi ◽  
Qiang Hua Zhang ◽  
Liang Dong Feng ◽  
Qing Ping Xiong ◽  
Fei Liu
Keyword(s):  
Ph Value ◽  
Synthesis Process ◽  
Optimum Conditions ◽  
Order Model ◽  
Fast Kinetics ◽  
Kinetics Of Adsorption ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Ion Imprinting ◽  
Kinetics Of

By using Palygorskite as matrix and introducing the surface ion-imprinting concept to the synthesis process, a Palygorskite-supported organic–inorganic hybrid polymer for selective separation of Pb2+ from aqueous solutio was prepared. The prepared polymer was characterized with techniques of SEM, XRD and FT-IR. The effects of contact time, pH value and temperature of the initial solution on the adsorption characters of Pb2+ were investigated. Under the optimum conditions, the ions-imprinted polymer offered a fast kinetics for the adsorption of Pb2+ and the maximum capacity was 4.51 mg/g. And the pseudo-second order model bestly described the kinetics of adsorption of Pb2+ onto the as-prepared materials.

Coordination of Polyacrylic Grafted Polytetrafluoroethylene Fiber with Fe (III) Ions in Aqueous Solution

2013 ◽  
Vol 683 ◽  
pp. 339-342
Author(s):  
Bing Li ◽  
Yong Chun Dong
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Freundlich Isotherm ◽  
The Other ◽  
Ion Concentration ◽  
Order Model ◽  
Coordination Process ◽  
Pseudo Second Order ◽  
Isotherm Equations ◽  
Kinetics Of

The grafted polytetrafluoroethylene (PTFE) fibers were prepared with acrylic acid and then coordinated with Fe (III) ions. The effect of initial Fe (III) ion concentration and temperature on coordination process was investigated. In addition, the kinetics of the coordination process was also evaluated. The results indicated that increasing initial Fe (III) concentration and temperature significantly improve the amount of Fe (III) ions coordinated onto the fiber. The coordination between them can be described by Langmuir and Freundlich isotherm equations. On the other hand, coordinating process also follows a pseudo-second order model. Moreover, a higher initial Fe (III) ion concentration gives rise to an enhanced initial Fe (III) ion coordination rate.

Study on the Formaldehyde Adsorption Kinetics of Dry Waters

2014 ◽  
Vol 809-810 ◽  
pp. 907-911
Author(s):  
Jun Long Wang ◽  
Jie Hou ◽  
Ting Jiang ◽  
Yong Jun He ◽  
Yao Dong Liang
Keyword(s):  
Adsorption Kinetics ◽  
High Speed ◽  
Adsorption Process ◽  
Average Diameter ◽  
Adsorption Rate ◽  
Absorption Kinetics ◽  
Order Model ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Formaldehyde Adsorption

Dry waters with an average diameter of 82 μm were prepared by a high speed mixed route. The formaldehyde absorption kinetics of dry waters was investigated by simulating indoor formaldehyde pollution in glass chamber. The results showed that pseudo-second order model could be used to simulate the adsorption process; the adsorption rate was highest in the initial 60 minutes; when the adsorption lasted for 180 minutes, the adsorption reached equilibrium.

scholarly journals Adsorption Characteristics of Phosphate Ions by Pristine, CaCl2 and FeCl3-Activated Biochars Originated from Tangerine Peels

Separations ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 32 ◽  
Author(s):  
Changgil Son ◽  
Wonyeol An ◽  
Geonhee Lee ◽  
Inho Jeong ◽  
Yong-Gu Lee ◽  
...  
Keyword(s):  
Adsorption Kinetics ◽  
Chemical Activation ◽  
Isotherm Models ◽  
Order Model ◽  
Phosphate Ions ◽  
Adsorption Capacities ◽  
Adsorption Isotherm Models ◽  
Endothermic Reactions ◽  
Pseudo Second Order ◽  
Adsorption Kinetics And Isotherm

This study has evaluated the removal efficiencies of phosphate ions (PO43−) using pristine (TB) and chemical-activated tangerine peel biochars. The adsorption kinetics and isotherm presented that the enhanced physicochemical properties of TB surface through the chemical activation with CaCl2 (CTB) and FeCl3 (FTB) were helpful in the adsorption capacities of PO43− (equilibrium adsorption capacity: FTB (1.655 mg g−1) > CTB (0.354 mg g−1) > TB (0.104 mg g−1)). The adsorption kinetics results revealed that PO43− removal by TB, CTB, and FTB was well fitted with the pseudo-second-order model (R2 = 0.999) than the pseudo-first-order model (R2 ≥ 0.929). The adsorption isotherm models showed that the Freundlich equation was suitable for PO43− removal by TB (R2 = 0.975) and CTB (R2 = 0.955). In contrast, the Langmuir equation was proper for PO43− removal by FTB (R2 = 0.987). The PO43− removal efficiency of CTB and FTB decreased with the ionic strength increased due to the compression of the electrical double layer on the CTB and FTB surfaces. Besides, the PO43− adsorptions by TB, CTB, and FTB were spontaneous endothermic reactions. These findings demonstrated FTB was the most promising method for removing PO43− in waters.

Adsorption Kinetics of Pb2+ Ions Using Chitosan Nanoparticles

2013 ◽  
Vol 367 ◽  
pp. 45-49
Author(s):  
Ying Hong ◽  
Ze Hui Zhong ◽  
You Shi Liu
Keyword(s):  
Adsorption Kinetics ◽  
Chitosan Nanoparticles ◽  
Second Order ◽  
Isotherm Model ◽  
Order Model ◽  
Adsorption Characteristics ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Second Order Model

Chitosan nanoparticles were prepared by crosslinkingusing TPP. SEM showed that chitosan nanoparticles were successfully obtained.The adsorption characteristics of chitosan nanoparticles were evaluated. Theresults demonstrated that chitosan nanoparticles were suitable for adsorbent toremoval Pb2+. The parameters for the adsorption of Pb2+by chitosan nanoparticles were also determined. It was shown that chitosannanoparticles were fit for Langmuir’s isotherm model and that the adsorptionkinetics of Pb2+ described by the pseudo-second-order model could bebest.

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