Synthesis of copolymeric hydrogels of acrylamide and 2-(hydroxyethyl methacrylate) and its use for the adsorption of basic blue 3 dye

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sultan Alam ◽  
Luqman Khan ◽  
Luqman Ali Shah ◽  
Noor Rehman ◽  
◽  
...  
Keyword(s):  
Adsorption Process ◽  
Second Order ◽  
Diffusion Control ◽  
Equilibration Time ◽  
Hydroxyethyl Methacrylate ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Addition Polymerization ◽  
Pseudo Second Order ◽  
Free Radical Addition

AbstractHomo and copolymer hydrogels of acrylamide and 2-hydroxyethyl methacrylate (HEMA) were synthesized by free radical addition polymerization. The synthesized hydrogels were characterized by scanning electron microscopy (SEM), thermal gravimetric and differential thermal analysis (TGA/DTA). The hydrogels were used as an adsorbent for the removal of toxic azo dye Basic blue 3 (BB3) in aqueous medium. To check the swelling property the equilibrium swelling of these synthesized hydrogels were established within 24 h. The effect of pH, time and temperature in the process of BB3 adsorption was studied in detail. The maximum adsorption of BB3 on hydrogels was occurred at pH 9 with 60 min equilibration time. The kinetic data were applied to pseudo first order, pseudo second order and intraparticle diffusion model. The obtained results indicate that the adsorption process, obey pseudo second order kinetics and is diffusion control. The negative value of ΔS and positive values of ΔG and ΔH showed that the adsorption process is orderliness, non-spontaneous and endothermic respectively in nature. The hydrogels were successfully regenerated from the mixture and used again in several steps without a reduction in their efficiency.

scholarly journals Adsorption purification of waste water from chromium by ferrite manganese

2020 ◽  
Vol 168 ◽  
pp. 00026
Author(s):  
Liliia Frolova ◽  
Mykola Kharytonov ◽  
Iryna Klimkina ◽  
Oleksandr Kovrov ◽  
Andrii Koveria
Keyword(s):  
Adsorption Process ◽  
Uv Spectroscopy ◽  
Second Order ◽  
Waste Waters ◽  
Equilibrium Isotherms ◽  
X Ray ◽  
First Order ◽  
Freundlich Isotherms ◽  
Pseudo Second Order ◽  
Kinetics Of

Plasma method is used to synthesize manganese ferrite. The basic properties of ferrite are determined by IR spectroscopy, UV spectroscopy, X-ray phase analysis, vibration magnetometry. The paper shows that the use of magnetically controlled sorbent allows to purify waste waters from chromium (III). The process of adsorption of chromium cations (III) is investigated. The kinetics of the process is studied. To describe the equilibrium isotherms, the experimental data are analysed by the models of Langmuir, Freundlich isotherms. Pseudo-first order, pseudo-second-order, and Weber-Morris are used to elucidate the kinetic parameters and mechanism of the adsorption process. It has been established that the removal of Cr (III) cations is described by the pseudo-second order of the Langmuir reaction and mechanism.

Competitive Adsorption of Fluoride and Phosphate on MgAl-Co3 Layered Double Hydroxides

2010 ◽  
Vol 160-162 ◽  
pp. 182-188 ◽  
Author(s):  
Peng Cai ◽  
Hong Zheng ◽  
Peng Liang ◽  
Shu Ping Liang
Keyword(s):  
Competitive Adsorption ◽  
Second Order ◽  
Initial Concentration ◽  
Adsorbent Dosage ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Small Influence ◽  
Experimental Parameters ◽  
Pseudo Second Order ◽  
Double Hydroxides

Competitive adsorption experiment of fluoride and phosphate on MgAl-CO3 LDHs has been conducted. A series of batch experiments were performed to study the influence of various experimental parameters such as pH, adsorbent dosage and contact time on the adsorption of fluoride and phosphate on MgAl-CO3 LDHs. Three kinetic models have been evaluated in order to attempt to fit the experimental data, namely the pseudo-first order, the pseudo-second order and the Weber and Morris intraparticle diffusion model. The effects of the initial concentration and the addition order of fluoride and phosphate on their adsorption by MgAl-CO3 LDHs were also investigated. The results show that the optimal pH is 4 to 5, adsorbent dosage is 2 g/L and it takes about 2 hours to attain equilibrium. It was found that the pseudo-second order most closely describes the kinetics. The initial concentration and the addition order of fluoride and phosphate influence the adsorption of fluoride to a certain extent, but they have relatively small influence to the adsorption of phosphate on MgAl-CO3 LDHs.

scholarly journals Preparation of Synthetic Clays to Remove Phosphates and Ibuprofen in Water

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2394
Author(s):  
Rosa Devesa-Rey ◽  
Jesús del Val ◽  
Jorge Feijoo ◽  
José González-Coma ◽  
Gonzalo Castiñeira ◽  
...  
Keyword(s):  
Close Agreement ◽  
Adsorption Process ◽  
Intraparticle Diffusion ◽  
Phosphate Adsorption ◽  
Order Model ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Pseudo Second Order ◽  
Double Hydroxide ◽  
Phosphate Desorption

The main objective of this study consists in the synthesis of a layered double hydroxide (LDH) clay doped with magnesium and aluminum in order to test the removal of phosphates and ibuprofen in water. Two different LDH composites are assessed: oven-dried (LDHD) and calcined (LDHC). Single adsorptions of phosphate and ibuprofen showed up to 70% and 58% removal in water, when LDHC was used. A poorer performance was observed for LDHD, which presented adsorption efficiencies of 52% and 35%, respectively. The simultaneous removal of phosphate and ibuprofen in water showed that LDHC allows a greater reduction in the concentration of both compounds than LDHD. Phosphate adsorption showed a close agreement between the experimental and theoretical capacities predicted by the pseudo-second-order model, whereas ibuprofen fitted to a first-order model. In addition, phosphate adsorption showed a good fit to an intraparticle diffusion model and to Bangham model suggesting that diffusion into pores controls the adsorption process. No other mechanisms may be involved in ibuprofen adsorption, apart from intraparticle diffusion. Finally, phosphate desorption could recover up to 59% of the initial concentration, showing the feasibility of the recuperation of this compound in the LDH.

Adsorpsi zat organik nitrobenzene dari larutan dengan menggunakan bubuk daun intaran

2018 ◽  
Vol 7 (3) ◽  
pp. 844
Author(s):  
Yentaria Juli Wijaya ◽  
R Rinita ◽  
Felycia Edi Soetaredjo ◽  
Suryadi Ismadji
Keyword(s):  
Adsorption Process ◽  
Low Cost ◽  
Volatile Matter ◽  
Langmuir Equation ◽  
Second Order ◽  
Organic Chemical ◽  
First Order ◽  
Leaf Powder ◽  
Pseudo Second Order ◽  
Pseudo First Order

Nitrobenzene is one of organic compound that usually contained in industrial wastewater, which is toxic. Nitrobenzene can be found in the chemical and pesticides industry. Nitrobenzene, which also known as nitrobenzol, is dangerous organic chemical for organism because can cause death. Organic waste in aqueous solution are usually removed by adsorption. In the adsorption process, adsorbent that usually used are carbon active and organic adsorbent. Neem leaf one of organic adsorbent that effective used in the adsorption process because it has a low cost dan easy to get. In this adsorption process, neem leaf used as a adsorbent. Neem leaf powder characterization with Boehm’s titration and proxymate analysis, which contain moisture content, water content, carbon, and volatile matter. Isoterm adsorption process of  nitrobenzene is appropriated with Freundlich equation and Langmuir equation. And the result of kinetic adsorption is appropriated with pseudo first order and pseudo second order. From the experimenal result, it can be seen that adsorption of nitrobenzene by neem leaf powder is using Langmuir equation in isoterm adsorption and follow pseudo first order in kinetic adsorption.Keywords : Adsorption, neem leaf powder, nitrobenzeneAbstrakNitrobenzene merupakan salah satu zat organik yang biasanya terkandung dalam limbah industri dimana Nitrobenzene sangat sulit diolah sebelum dibuang karena sifatnya yang sangat kompleks. Limbah yang mengandung nitrobenzene ini dapat ditemukan pada industri pestisida, sabun, dan farmasi. Nitrobenzene yang juga disebut nitrobenzol, merupakan bahan kimia organik yang berbahaya bagi mahluk hidup karena dapat menyebabkan kematian. Adsorpsi adalah salah satu cara yang dapat digunakan untuk mengatasi limbah nitrobenzene ini. Dalam proses adsorpsi, bahan penyerap yang umum digunakan adalah karbon aktif dan bahan penyerap organik. Daun intaran merupakan salah satu dari bahan penyerap organik yang efektif digunakan dalam proses adsorpsi karena biayanya yang murah dan mudah didapat. Pada penelitian ini, daun intaran digunakan untuk menyerap zat organik nitrobenzene. Karakterisasi bubuk daun intaran sendiri dilakukan dengan titrasi Boehm dan analisa proximat yang meliputi kandungan abu, air, karbon, dan volatile matter. Proses isoterm adsorpsi nitrobenzene ini disesuaikan dengan persamaan Freundlich dan persamaan Langmuir, sedangkan hasil kinetika adsorpsi disesuaikan dengan menggunakan pseudo first order dan pseudo second order. Dari hasil percobaan, didapatkan hasil bahwa proses adsorpsi nitrobenzene dengan menggunakan bubuk daun intaran ini mengikuti persamaan Langmuir pada isoterm adsorpsinya dan mengikuti persamaan pseudo first order pada kinetika adsorpsinya.Kata Kunci : Adsorpsi, bubuk daun intaran, nitrobenzene

Study on Adsorption Property of Collagen Fiber Loaded Hyperbranched Polyamide-Amine Toward Cr (VI)

2012 ◽  
Vol 610-613 ◽  
pp. 514-517 ◽  
Author(s):  
Xue Chuan Wang ◽  
Fei Fei Zhang ◽  
Tao Tao Qiang
Keyword(s):  
Collagen Fiber ◽  
Adsorption Process ◽  
Adsorption Property ◽  
Second Order ◽  
Experimental Results ◽  
Order Model ◽  
First Order ◽  
Before And After ◽  
Pseudo Second Order ◽  
Hyperbranched Polyamide

Collagen fiber loaded hyperbranched polyamide-amine(CF-HBPN) was prepared by the crosslinking power of glutaraldehyde. The structure of CF-HBPN before and after adsorption was characterized and analyzed via scanning electron microscopy. The CF-HBPN was effective adsorbent for the removal of Cr(VI) from aqueous solutions. The adsorption isotherm and kinetic of the adsorption process were studied. The experimental results were fitted using the Langmuir, Freundlich and Temkin equations. The experimental results indicated that the Langmuir isotherm was better in describing the adsorption process. Two kinetic models, the pseudo-first order and pseudo-second order, were used to analyze the kinetic data. The pseudo-second order model was proven to be better in describing the adsorption behavior.

Adsorption of Aniline from Aqueous Solution by KSF Montmorillonite

2011 ◽  
Vol 356-360 ◽  
pp. 208-216
Author(s):  
Jiang Ying Zhang ◽  
Jian Xu ◽  
Yuan Zhang ◽  
Lei Li ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Adsorption Process ◽  
Intraparticle Diffusion ◽  
Order Equation ◽  
Second Order ◽  
First Order ◽  
Ph Values ◽  
Whole Process ◽  
Pseudo Second Order ◽  
Pseudo First Order

In the present paper, the adsorption characteristics of aniline onto KSF montmorillonite from aqueous solution were investigated. Experiments were conducted at various pH values, temperatures, ionic strength and surfactant concentrations. Pseudo-first-order, pseudo-second-order and intraparticle diffusion models were adopted to investigate the rate parameters, and the pseudo-second-order equation was proved to be able to successfully predict whole process. Optimal adsorption pH was determined at 3.6. Among the selected models (linear, Langmuir, Freundlich, DR (Dubinin–Radusckevich) models), linear and DR models were found to be better fit the experimental data, which revealed the physisorption nature of the adsorption process. Meanwhile, with the increase of reaction temperatures, the adsorption capacity decreased. The results of the calculated thermodynamic parameters demonstrated that the adsorption was an exothermic, spontaneous and unfavorable process.

Batch Adsorption of Synthetic Dye by Maclura Pomifera, a New Eco-Friendly Waste Biomass: Experimental Studies and Modeling

2019 ◽  
Vol 17 (4) ◽  
Author(s):  
Meryem Bounaas ◽  
Abdallah Bouguettoucha ◽  
Derradji Chebli ◽  
Abdelbaki Reffas ◽  
José Manuel Gatica ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Ph Value ◽  
Experimental Studies ◽  
Correlation Factor ◽  
Second Order ◽  
Batch Adsorption ◽  
Waste Biomass ◽  
Maclura Pomifera ◽  
First Order ◽  
Pseudo Second Order

Abstract The removal of Methylene blue (MB) from aqueous medium using alkaline modified Maclura pomifera (NaOH-MMP) has been studied in this work. Results showed that a pH value of 6 was favorable for the adsorption of MB. Rate constants of pseudo-first-order, pseudo-second-order and nth kinetic model were determined to analyze the dynamic of the adsorption process; they showed that adsorption kinetics followed a pseudo-second-order and nth kinetic models. The Sips isotherm model was found to be the most relevant to describe MB sorption onto NaOH-MMP with a correlation factor R2 > 0.999. The adsorption capacity of NaOH-MMP was found to be 160 mg g−1 at 25 °C, confirming its biosorbent efficiency for the removal of MB dye from aqueous solutions. Thermodynamic parameters indicated that the MB adsorption onto adsorbent was feasible in nature, spontaneous, and exothermique.

scholarly journals Comparative Study on Adsorptive Characteristics of Diazinon and Chlorpyrifos from Water by Thermosensitive Nanosphere Polymer

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Faranak Pishgar ◽  
Homayon Ahmad Panahi ◽  
Ali Akbar Khodaparast Haghi ◽  
Vahid Motaghitalab ◽  
Amir Hesam Hasani
Keyword(s):  
Kinetic Data ◽  
Contact Time ◽  
Adsorption Process ◽  
Intraparticle Diffusion ◽  
Initial Concentration ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Removal Capacity ◽  
Pseudo Second Order ◽  
Pseudo First Order

Diazinon and chlorpyrifos are two common organophosphorus poisons to fight the pests in Iran. The removal of these poisons from water by thermosensitive nanosphere polymer (TNP), synthesized from the copolymerization of N-isopropylacrylamide and 3-allyloxy-1,2-propanediol, was investigated. The effect of pH, contact time, and the initial concentration on the removal amount was studied. The highest removal amount of these poisons by TNP occurred at pH 7. The contact time increase improves the removal amount and the equilibrium contact time for diazinon and chlorpyrifos was 10 and 18 min, respectively. For low concentration of less than 50 mgL−1it was shown that removal capacity remains above 95%. The initial concentration above 50 mgL−1decreased the removal amount, in which chlorpyrifos showed a greater decrease. The kinetic data has been checked using pseudo first-order, pseudo second-order, and intraparticle diffusion equations. The intraparticle diffusion model had the best conformability for the adsorption process.

Adsorption of lead (II) ions onto novel cassava starch 5-choloromethyl-8-hydroxyquinoline polymer from an aqueous medium

2016 ◽  
Vol 74 (4) ◽  
pp. 943-956 ◽  
Author(s):  
Prapti U. Shah ◽  
Nirav P. Raval ◽  
Mayur Vekariya ◽  
Poonam M. Wadhwani ◽  
Nisha K. Shah
Keyword(s):  
Aqueous Medium ◽  
Low Cost ◽  
Cassava Starch ◽  
Second Order ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Adsorption Capacities ◽  
Pseudo Second Order ◽  
Langmuir And Freundlich Models ◽  
Time Lead

Adsorption of lead (II) ions onto cassava starch 5-choloromethyl-8-hydroxyquinoline polymer (CSCMQ) was investigated with the variation in the parameters of pH, contact time, lead (II) ions concentration, temperature and the adsorbent dose. The Langmuir and Freundlich models have been applied. CSCMQ was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. Results showed that the adsorption process was better described by the Langmuir model. Adsorption kinetics data obtained for the metal ions sorption were investigated using pseudo-first-order, pseudo-second-order and intraparticle diffusion model. The maximum adsorption capacities (qm) were 46.512, 43.859 and 42.735 mg/g at 25, 35 and 45 °C, respectively. The dynamical data fit well with the second-order kinetics model. The results indicate that CSCMQ could be employed as low-cost material for the adsorption of Pb(II) ions from aqueous medium.

scholarly journals Kinetic Approach for the Adsorption of Organophosphorous Pesticides from Aqueous Solution Using “Waste” Jute Fiber Carbon

2010 ◽  
Vol 7 (s1) ◽  
pp. S511-S519 ◽  
Author(s):  
S. Senthilkumaar ◽  
S. K. Krishna ◽  
P. Kalaamanic ◽  
C. V. Subburamaan ◽  
N. Ganapathy Subramaniam ◽  
...  
Keyword(s):  
Kinetic Models ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Proximate Analysis ◽  
Second Order ◽  
Jute Fiber ◽  
Organophosphorous Pesticides ◽  
First Order ◽  
Pseudo Second Order ◽  
Pseudo First Order

Chemically activated “Waste” Jute Fiber carbon has been effectively used for the removal of five organophosphorous pesticides (malathion, monocrotophos, methylparathion, phosphamidon and dimethoate) from aqueous solutions. The prepared activated jute fiber carbon was characterized by using Elemental analyzer and proximate analysis methods. The adsorption equilibrium was examined at 28ºC. Three different kinetic models, the pseudo first order, pseudo second order and Elovich kinetic models were selected to analyses the adsorption process. To compare the fitness of pseudo first order and pseudo second order, sum of the squares of the errors and correlation coefficient, r2values were calculated. The Elovich model was used to confirm the chemisorptions.

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