scholarly journals Physicochemical Interactions in Systems C.I. Direct Yellow 50—Weakly Basic Resins: Kinetic, Equilibrium, and Auxiliaries Addition Aspects

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 385
Author(s):  
Monika Wawrzkiewicz ◽  
Ewelina Polska-Adach
Keyword(s):  
Phenol Formaldehyde ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Model ◽  
Langmuir Adsorption ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Basic Anion ◽  
Intensive Development ◽  
Kinetic Equilibrium

Intensive development of many industries, including textile, paper or plastic, which consume large amounts of water and generate huge amounts of wastewater-containing toxic dyes, contribute to pollution of the aquatic environment. Among many known methods of wastewater treatment, adsorption techniques are considered the most effective. In the present study, the weakly basic anion exchangers such as Amberlyst A21, Amberlyst A23 and Amberlyst A24 of the polystyrene, phenol-formaldehyde and polyacrylic matrices were used for C.I. Direct Yellow 50 removal from aqueous solutions. The equilibrium adsorption data were well fitted to the Langmuir adsorption isotherm. Kinetic studies were described by the pseudo-second order model. The pseudo-second order rate constants were in the range of 0.0609–0.0128 g/mg·min for Amberlyst A24, 0.0038–0.0015 g/mg·min for Amberlyst A21 and 1.1945–0.0032 g/mg·min for Amberlyst A23, and decreased with the increasing initial concentration of dye from 100–500 mg/L, respectively. There were observed auxiliaries (Na2CO3, Na2SO4, anionic and non-ionic surfactants) impact on the dye uptake. The polyacrylic resin Amberlyst A24 can be promising sorbent for C.I. Direct Yellow 50 removal as it is able to uptake 666.5 mg/g of the dye compared to the phenol-formaldehyde Amberlyst A23 which has a 284.3 mg/g capacity.

scholarly journals Physicochemical Interactions in Systems C.I. Direct Yellow 50 – Weakly Basic Resins: Kinetic, Equilibrium, and Auxiliaries Addition Aspects

2021 ◽  
Author(s):  
Monika Wawrzkiewicz ◽  
Ewelina Polska-Adach
Keyword(s):  
Phenol Formaldehyde ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Model ◽  
Langmuir Adsorption ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Basic Anion ◽  
Intensive Development ◽  
Kinetic Equilibrium

Intensive development of many industries, including textile, paper or plastic, which consume large amounts of water and generate huge amounts of wastewaters containing toxic dyes, contribute to pollution of the aquatic environment. Among many known methods of wastewater treatment, adsorption techniques are considered as the most effective. In the present study the weakly basic anion exchangers such as Amberlyst A21, Amberlyst A23 and Amberlyst A24 of the polystyrene, phenol-formaldehyde and polyacrylic matrices were used for C.I. Direct Yellow 50 removal from aqueous solutions. The equilibrium adsorption data were well fitted to the Langmuir adsorption isotherm. Kinetic studies were described by the pseudo-second order model. The pseudo-second order rate constants were in the range of 0.0609-0.0128 g/mg·min for Amberlyst A24, 0.0038-0.0015 g/mg·min for Amberlyst A21 and 1.1945-0.0032 g/mg·min for Amberlyst A23, and decreased with the increasing initial concentration of dye from 100-500 mg/L, respectively. There were observed auxiliaries (Na2CO3, Na2SO4, anionic and non-ionic surfactants) impact on the dye uptake. The polyacrylic resin Amberlyst A24 can be promising sorbent for C.I. Direct Yellow 50 removal as it is able to uptake 666.5 mg/g of the dye compared to the phenol-formaldehyde Amberlyst A23 of the 284.3 mg/g capacity.

Removal of Pb (II) from Aqueous Solution by Blast-Furnace Slags

2013 ◽  
Vol 726-731 ◽  
pp. 2736-2741
Author(s):  
Ming Da Liu ◽  
Ge Tian ◽  
Liang Jie Zhao ◽  
Yao Sheng Wang ◽  
Lei Guo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Blast Furnace ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Sorption Process ◽  
Second Order ◽  
Order Model ◽  
Pseudo Second Order ◽  
Solution Kinetic ◽  
Second Order Model

Five blast-furnace slags were used as adsorbents to remove Pb (II) from aqueous solution. Kinetic studies showed that the sorption process was best described by pseudo-second-order model. Among Langmuir, Freundlich and Temkin isotherms, the Freundlich isotherm had a better fit with the simulation of the adsorption of Pb (II).

scholarly journals Biosorption of lead contaminated wastewater using cattails (Typha angustifolia) leaves: Kinetic studies

2011 ◽  
Vol 76 (7) ◽  
pp. 1037-1047 ◽  
Author(s):  
Sharain Ling ◽  
Collin Joseph ◽  
How Eng
Keyword(s):  
Linear Regression Analysis ◽  
Model Fitting ◽  
Kinetic Studies ◽  
Second Order ◽  
Batch Adsorption ◽  
Typha Angustifolia ◽  
Order Model ◽  
Effective Removal ◽  
Pseudo Second Order ◽  
The Common

In this work, dried leaves of Typha angustifolia (TA), also known as the common cattail, were used as an adsorbent in kinetic studies of Pb(II) adsorption from synthetic aqueous solutions. Batch adsorption studies with dried TA leaves were conducted and they were able to adsorb Pb(II) from 100 mL of a 25 mg L-1 Pb(II) solution effectively with the optimized dosage of 0.6 g. Adsorption equilibrium was achieved within 8 hours with an effective removal percentage of 86.04 %. Adsorption kinetics was further evaluated using four kinetic models, i.e., the pseudofirst order, pseudo-second order, intraparticle diffusion and Elovich model. Fitting of the data was performed based on linear regression analysis. The sorption kinetic data fitted best to the pseudo-second order model with an R2 of 0.9979, followed closely by the Elovich model with an R2 of 0.9952. The obtained results showed the adsorption of Pb(II) by TA leaves, which is an abundant biological material, is feasible, cheap and environmentally friendly.

scholarly journals Evaluation of the Marine AlgaeGracilariaand its Activated Carbon for the Adsorption of Ni(II) from Wastewater

2011 ◽  
Vol 8 (4) ◽  
pp. 1512-1521 ◽  
Author(s):  
A. Esmaeili ◽  
P. Beirami ◽  
S. Ghasemi
Keyword(s):  
Activated Carbon ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Solution Ph ◽  
Isotherm Equation ◽  
Adsorption Data ◽  
Langmuir Isotherm Equation ◽  
Pseudo Second Order

The batch removal of Ni2+from aqueous solution and wastewater using marine dried (MD) red algaeGracilariaand its activated carbon (AC) was studied. For these experiments, adsorption of Ni2+was used to form two biomasses of AC and MD. Both methods used different pH values, biomass and initial concentration of Ni2+. Subsequently adsorption models and kinetic studies were carried out. The maximum efficiencies of Ni2+removal were 83.55% and 99.04% for MD and AC respectively developed from it. The experimental adsorption data were fitted to the Langmuir adsorption model. The nickel(II) uptake by the biosorbents was best described by pseudo-second order rate model. The kinetic studies showed that the heavy metal uptake was observed more rapidly by the AC with compared to MD. AC method developed from MD biomass exhibited higher biosorption capacity. Adsorption capacity is related to the pH of solution, pH 5.0 is optimal for nickel. The maximum efficiencies of Ni2+removal were for AC method. The capacity is related to the pH of solution, pH 5.0 is optimal for nickel. The equilibrium adsorption data are correlated by Langmuir isotherm equation. The adsorption kinetic data can be described by the second order kinetic models

scholarly journals Kinetic and equilibrium studies of biosorption of M(II) (M = Cu, Pb, Ni, Zn and Cd) onto seaweed Posidonia oceanica fibers

2019 ◽  
Vol 9 (8) ◽  
Author(s):  
Wassila Boulaiche ◽  
Badreddine Belhamdi ◽  
Boualem Hamdi ◽  
Mohamed Trari
Keyword(s):  
Posidonia Oceanica ◽  
Second Order ◽  
Order Model ◽  
Equilibrium Studies ◽  
First Order ◽  
Metal Biosorption ◽  
Batch System ◽  
Adsorption Data ◽  
Equilibrium Data ◽  
Pseudo Second Order

Abstract This work reports the application of Posidonia oceanica for the elimination of heavy metals M(II) (M = Zn, Cd, Ni, Cu and Pb) by biosorption in batch system. The effect of the contact time, initial M concentration, pH and temperature was considered. The kinetic and equilibrium models for the M-biosorption were tested namely the pseudo-first-order, pseudo-second-order and Elovich kinetic models. Langmuir, Freundlich, Temkin and Dubinin–Radushkevich isotherms models have also been used to fit equilibrium adsorption data. The adsorption kinetics follow a pseudo-second-order model for all studied systems, and the equilibrium data are suitably fitted by the above models. The amount of adsorbed metals by biosorption is 48.33, 43.9, 41.02, 37.90 and 30.22 mg/g for Pb(II), Cu(II), Ni(II), Zn(II) and Cd(II), respectively. The thermodynamic parameters suggested that the metal biosorption is spontaneous with an endothermic nature.

scholarly journals Adsorption Potential of Magnetite Nanoparticles for Copper Removal From Aqueous Solution

2019 ◽  
Vol 9 (1) ◽  
pp. 5424-5429
Keyword(s):  
Aqueous Solution ◽  
Magnetite Nanoparticles ◽  
Kinetic Studies ◽  
High Energy ◽  
Second Order ◽  
X Rays ◽  
Ball Mills ◽  
Order Model ◽  
Pseudo Second Order ◽  
Second Order Model

In this study, the magnetite nanoparticles (MNP) was successfully synthesized from mill scale waste to analyze the removal of Cu (II) ions from the aqueous solution. The micron-sized magnetite was milled using the high energy ball mills (HEBM with the variation of milling hours 3,5 and 7 to produce nano-sized particles. The MNP were measured by X-Rays Diffraction (XRD), Transmission Electron Microscopy (TEM), Brunauer-Emmett-Teller (BET) and Atomic Absorption Spectroscopy (AAS). Studied parameters are contact time, the initial concentration and particle size. The adsorption kinetics was relatively quick and equilibrium is reached at about 30 minutes. In kinetic studies, the pseudo-second-order model was employed. Langmuir model (R2 >0.9987) corresponded with the adsorption isotherm data of Cu (II) ions. The adsorption capacity of Cu (II) ions onto magnetite nanoparticles (MNP) is 11.36 mgg -1 at 7 hours milling hours. Pseudo-second-order model and Langmuir isotherm were obeyed with experimental results.

scholarly journals Adsorption kinetics of Direct Black 38 on nitrogen-doped TiO2

2014 ◽  
Vol 16 (4) ◽  
pp. 690-698 ◽  
Keyword(s):  
Adsorption Kinetics ◽  
Kinetic Studies ◽  
Second Order ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Nitrogen Doped ◽  
Calcination Temperatures ◽  
Three Samples ◽  
Pseudo Second Order ◽  
Second Order Model

<div> <p>In this work, three samples of nitrogen-doped TiO<sub>2 </sub>prepared at different calcination temperatures (400, 450 and 500 &deg;C) were applied for the adsorption of Direct Black 38. Kinetic studies about the adsorption of Direct Black 38 on nitrogen-doped TiO<sub>2 </sub>were performed under different initial dye concentrations<br /> (75-175 mg l<sup>-1</sup>). Pseudo-first and pseudo-second order models were fitted with the experimental data. The results revealed that nitrogen-doped TiO<sub>2 </sub>synthesized at 400 &deg;C presented the more adequate characteristics for adsorption purposes, such as specific surface area of 151 m<sup>2</sup> g<sup>-1</sup>. The adsorption kinetics agreed with the pseudo-second order model, at initial dye concentrations from 75 to 175 mg l<sup>-1</sup>. The maximum adsorption capacity predicted by the pseudo-second order model was 138.3 mg g<sup>-1</sup>, and was obtained using nitrogen-doped TiO<sub>2</sub> synthesized at 400 &deg;C. In summary, these results revealed that nitrogen-doped TiO<sub>2</sub> is a good material for the removal Direct Black 38 from aqueous solutions by adsorption.&nbsp;</p> </div> <p>&nbsp;</p>

Studies of Chromium Removal from Tannery Effluents by Dead Streptomyces Rimosus

2008 ◽  
Vol 3 (1) ◽  
Author(s):  
Mohamed Nasser Sahmoune ◽  
Krim Louhab ◽  
Aissa Boukhiar
Keyword(s):  
Fractional Power ◽  
Kinetic Studies ◽  
Second Order ◽  
Order Kinetic ◽  
Streptomyces Rimosus ◽  
Tannery Effluents ◽  
Equilibrium Data ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Ph Range

Dead streptomyces rimosus was found to be an effective biosorbent for the removal of chromium from industrial tanning effluents. A sorption level of 65 mg/g was observed at pH 4.8 while the precipitation effect augmented this value at a higher pH range. Chromium desorption increased with decreasing desorption agents pH (including HCl and H2SO4) to a maximum value of 95% at approximately zero pH. The biosorption data of trivalent chromium by streptomyces rimosus has been used for kinetic studies based on fractional power, Elovich, pseudo-first order and pseudo-second order rate expressions. The time-dependent Cr (III) biosorption data were well-described by a pseudo-second-order kinetic model. The intraparticle diffusion is not the rate-limiting step for the whole reaction. It was found that the biosorption equilibrium data fit well with the Langmuir model.

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.

Removal of Methylene Blue Dye by Using Eggshell Powder

2013 ◽  
Vol 65 (1) ◽  
Author(s):  
Norzita Ngadi ◽  
Chin Chiek Ee ◽  
Nor Aida Yusoff
Keyword(s):  
Methylene Blue ◽  
Textile Industry ◽  
Low Cost ◽  
Kinetic Studies ◽  
Operating Conditions ◽  
Blue Dye ◽  
Dye Wastewater ◽  
Order Model ◽  
Aquatic Life ◽  
Pseudo Second Order

Dyes contain carcinogenic materials which can cause serious hazards to aquatic life and the users of water. Textile industry is the main source of dye wastewater which results in environmental pollution. Many studies have been conducted to investigate the use of low cost adsorbent as an alternative technique for the adsorption of dye. The objective of this study is to determine the potential of eggshell powder as an adsorbent for methylene blue removal and find out the best operating conditions for the color adsorption at laboratory scale. The adsorption of cationic methylene blue from aqueous solution onto the eggshell powder was carried out by varying the operating parameters which were contact time, pH, dosage of eggshell powder and temperature in order to study their effect in adsorption capacity of eggshell powder. The results obtained showed that the best operating condition for removal of methylene blue was at pH 10 (78.98 %) and temperature 50°C (47.37 %) by using 2 g of eggshell powder (57.03 %) with 30 minutes equilibrium time (41.36 %). The kinetic studies indicated that pseudo-second-order model best described the adsorption process.

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