scholarly journals Comparative Study of Cationic Dye Adsorption Using Industrial Latex Sludge with Sulfonate and Pyrolysis Treatment

2020 ◽  
Vol 12 (23) ◽  
pp. 10048
Author(s):  
Heng Wei ◽  
Jiankun Sun ◽  
Bin Zhang ◽  
Rongzhan Liu
Keyword(s):  
Dye Adsorption ◽  
Raw Material ◽  
Textile Dye ◽  
Order Kinetic ◽  
Kinetics Of Adsorption ◽  
Industrial Solid Waste ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Efficient Adsorbent

Industrial latex sludge as raw material was made into sulfonated latex sludge (SLS) and latex sludge active carbon (LSC) adsorbents by sulfonate and pyrolysis treatment to remove textile dye cationic blue X-GRRL from aqueous solution. The adsorption properties of SLS and LSC for X-GRRL were studied and compared by investigating the experimental parameters such as adsorbents dosage, pH, contact time and initial concentration. The kinetics of adsorption on SLS and LSC followed the pseudo-second-order kinetic model well. The adsorption isotherm and thermodynamic studies were further used to evaluate and compare the adsorption process of X-GRRL on SLS and LSC. The maximum adsorption capacities were 1219.6 mg/g for SLS and 476.2 mg/g for LSC according to the Langmuir model, respectively. These findings not only provide a sustainable strategy to turn industrial solid waste latex sludge into useful material for environment remediation, but also develop an efficient adsorbent for the treatment of dye wastewater.

scholarly journals Removal of Direct 50 Dyes from Aqueous Solution Using Natural Clay and Organoclay Adsorbents

2015 ◽  
Vol 12 (1) ◽  
pp. 157-166 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Ph Value ◽  
Dye Adsorption ◽  
Hexadecyltrimethylammonium Bromide ◽  
Textile Dye ◽  
Order Kinetic ◽  
Effects Of Ph ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Gibb’S Free Energy ◽  
Isotherm Equations

In this study, hexadecyltrimethylammonium bromide (HDMAB) - bentonite was synthesized by placing alkylammonium cation onto bentonite. Adsorption of textile dye such as direct Yellow 50 on natural bentonite and HDMAB -bentonite was investigated. The effects of pH, contact time,dosage clay and temperature were investigated experimentally .The Langmuir and Freundlish isotherms equations were applied to the data and values of parameters of these isotherm equations were evaluated. The study indicated that using 0.2 g of HDMAB (hexadecyltrimethylammonium bromide) lead to increase the percentage removal(R%) from 78% for pure bentonite to 99 %. The optimum pH value for the adsorption experiments was found to be pH=3 and therefore all the experiments were carried out at this pH value. The pseudo-second-order kinetic model agrees very well with the experimental results.Different thermodynamic parameters such as Gibb’s free energy, enthalpy and entropy of the on-going adsorption process have also been evaluated. The thermodynamic analyses of the dye adsorption on organoclay indicated that the system was endothermic in nature .

scholarly journals Experimental Studies on the Removal of Aluminium Ions from Synthetic Aqueous Solution by Hydroxyapatites

2021 ◽  
Vol 68 (4) ◽  
pp. 821-832
Author(s):  
Doina Humelnicu ◽  
Inga Zinicovscaia ◽  
Ionel Humelnicu ◽  
Maria Ignat
Keyword(s):  
Experimental Studies ◽  
Second Order ◽  
Pluronic F127 ◽  
Order Kinetic ◽  
Diffusion Kinetic ◽  
Kinetics Of Adsorption ◽  
Pluronic P123 ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Kinetics Of

In this work we have presented the results obtained in the adsorption behavior of hydroxyapatite with different treatment towards aluminium ions from synthetic wastewaters. Experiments were performed in batch technique at different pH values, temperatures, sorbent dosage, contact time and initial aluminium concentration. The thermodynamic studies on the adsorption process of aluminium onto hydroxyapatite indicated that the process is spontaneous and endothermic. The Langmuir, Freundlich, Flory-Huggins, Dubinin-Radushkevich and Temkin equilibrium models were applied to the description of experimental data. The adsorption of aluminium follows the Langmuir adsorption isotherm. The kinetics of adsorption was evaluated using the pseudo-first order, pseudo-second order and intraparticle diffusion kinetic models. The rate of aluminium adsorption was successfully described by a pseudo-second-order kinetic model. The obtained results indicated that hydroxyapatite treated with Pluronic P123 surfactant has a higher sorption capacity toward aluminium ions (117.65 mg g−1) than hydroxyapatite treated with Pluronic F127 surfactant (109.89 mg g−1) while untreated hydroxyapatite exhibited the lowest one (104.17 mg g−1).

scholarly journals Kinetics of adsorption of methylene blue onto activated kolanut pod

2021 ◽  
Vol 12 (2) ◽  
pp. 156-162
Author(s):  
A.S. Muhammad ◽  
M.A. Abdurrahman
Keyword(s):  
Contact Time ◽  
Adsorption Process ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
Kinetics Of Adsorption ◽  
Initial Concentration ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Calculated Amount

A batch adsorption process was carried out by optimizing, the effect of contact time (10min to 180min) and initial concentration (5mg/l to150mg/l). The adsorbent was characterized using FTIR spectra and SEM, and the result obtained showed shifting and disappearance of peaks after adsorption. The results of the adsorption kinetics, which includes the correlation coefficient 0.9771 and the agreement between the amount adsorbed experimentally (1.472mg/g) and the calculated amount absorbed(1.196mg/g) revealed that MB was adsorbed satisfactory according to the pseudo second-order kinetic model.

Synthesis, and characterization of chitosan bearing pyranoquinolinone moiety for textile dye adsorption from wastewater

2020 ◽  
Vol 81 (3) ◽  
pp. 421-435
Author(s):  
Shaimaa M. Ibrahim ◽  
Hany M. Hassanin ◽  
Marwa M. Abdelrazek
Keyword(s):  
Schiff Base ◽  
Dye Adsorption ◽  
Freundlich Isotherm ◽  
Textile Dye ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Remazol Red ◽  
Chitosan Schiff Base

Abstract A novel compound was synthesized by the reaction of the amino group of the chitosan with the formyl group of pyrano[3,2-c]quinoline-3-carboxaldehyde moiety, which produced chitosan modified with a Schiff base (chitosan Schiff base). The structure of the newly prepared composite was elucidated. Chitosan Schiff base was used to remove the textile anionic remazol red (RR) dye from wastewater. The kinetic data and adsorption isotherm were best fitted by the pseudo-second-order kinetic model and the Freundlich isotherm, respectively. Thermodynamic parameters were calculated. Chitosan Schiff base resulted in 100% removal of carcinogenic dye at 2 min only with qm 344.8 mg/g, and may do the same for other anionic reactive dyes, thus avoiding secondary pollution.

scholarly journals Study on the adsorption of methylene blue from aqueous solution using hydrogel glucomannan/graphene oxide

2021 ◽  
Vol 10 (1) ◽  
pp. 59-66
Author(s):  
Son Le Lam ◽  
Phu Nguyen Vinh ◽  
Hieu Le Trung ◽  
Tan Le Thua ◽  
Nhan Dang Thi Thanh ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Organic Dyes ◽  
Dye Adsorption ◽  
Order Kinetic ◽  
Equilibrium Data ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Glucomannan/graphene oxide (GM/GO) hydrogel was synthesized by using calcium hydroxide as the crosslinker. The synthesized material was characterized by using IR, XRD, SEM, EDX and RAMAN technology. The composite hydrogel was used for removal of organic dyes from aqueous solution. The results showed that the GM/GO hydrogel had a porous structure and a high adsorption capacity toward methylene blue (MB). The pseudo-second-order kinetic model could fit the rate equation of MB adsorption onto the GM/GO hydrogel. The adsorption of MB onto GM/GO hydrogel was a spontaneous process. In addition, the equilibrium adsorption isotherm data indicated that equilibrium data were fitted to the Langmuir isotherm and the maximum dye adsorption capacity was 198,69 mg.g-1. Moreover, the hydrogel was stable and easily recovered and adsorption capacity was around 97% of the initial saturation adsorption capacity after being used five times.

Performance of Nano Zero-Valent Iron Derived from the Decomposition of Siderite in the Removal of Phosphate

2021 ◽  
Vol 21 (1) ◽  
pp. 623-631
Author(s):  
Yueling Zhao ◽  
Haibo Liu ◽  
Tianhu Chen ◽  
Dong Chen ◽  
Chen Chen ◽  
...  
Keyword(s):  
Orthogonal Experiment ◽  
Zero Valent Iron ◽  
Raw Material ◽  
Order Kinetic ◽  
Experimental Conditions ◽  
P Concentration ◽  
Initial Ph ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Nano Zero Valent Iron

Natural siderite was selected as a raw material for preparing nano zero-valent iron (nZVI). The efficiency of the as-synthesized nZVI for PO3−4–P removal was investigated, and the effects of the annealing temperature, pH, initial PO3−4–P concentration, adsorption temperature and oxygen were investigated. The results indicated that after annealing at 550 °C, nZVI exhibited an average crystal size of 56.3 nm and a surface area of 14.1 m2/g. A decrease in pH and an increase in oxygen availability enhanced the removal efficiency. The adsorption process, which was spontaneous and exothermic according to the thermodynamic analysis, agreed well with the pseudo-second-order kinetic model. Based on the Langmuir equilibrium isotherms, the capacity of nZVI to adsorb phosphorus was determined to be 33.18 mg/L. The optimized conditions for the experimental conditions were defined by an orthogonal experiment as follows: initial P concentration 2 mg/L, initial pH 4, iron dose 2 g/L, adsorption time 60 min. The experimental results suggested that the as-prepared nZVI was a promising adsorbent for the removal of phosphate.

Characterization of natural- and organobentonite by XRD, SEM, FT-IR and thermal analysis techniques and its adsorption behaviour in aqueous solutions

Clay Minerals ◽  
2012 ◽  
Vol 47 (1) ◽  
pp. 31-44 ◽  
Author(s):  
G. A. Ikhtiyarova ◽  
A. S. Özcan ◽  
Ö. Gök ◽  
A. Özcan
Keyword(s):  
Surface Area ◽  
Bet Surface Area ◽  
Maximum Adsorption Capacity ◽  
Textile Dye ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Thermal Analysis Techniques

AbstractIn this study, natural bentonite was modified with hexadecyltrimethylammonium (HDTMA) bromide to obtain organobentonite (HDTMA-bentonite). Bentonite and HDTMA-bentonite were then characterized using XRD, XRF, SEM, FT-IR, thermogravimetric (TG) analysis, elemental analysis and Brunauer-Emmett-Teller (BET) surface area techniques. The HDTMA+ cation was found to be located on the surface and enters the interlayer spaces of smectite according to the XRD and SEM results. FT-IR spectra indicated the existence of HDTMA functional groups on the bentonite surface. The BET surface area significantly decreased after the modification due to the coverage of the pores of natural bentonite. After the characterization, the adsorption of a textile dye, Reactive Blue 19 (RB19), onto bentonite and HDTMA-bentonite was investigated. The maximum adsorption capacity of HDTMA-bentonite for RB19 was 502 mg g-1 at 20°C. The adsorption process followed a pseudo-second-order kinetic model and it was exothermic and physical in nature.

Chlorate Removal by Calcined Mg/Fe/Ce Layered Double Hydroxides

2015 ◽  
Vol 737 ◽  
pp. 537-540
Author(s):  
Yan Wei Guo ◽  
Hua Zhang ◽  
Zhi Liang Zhu
Keyword(s):  
Polluted Water ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Solution Ph ◽  
Langmuir Adsorption ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Kinetics Of

A novel Mg/Fe/Ce layered double hydroxide (LDHs) and its calcined product (CLDH) were synthesized and CLDH was used as adsorbents for the removal of chlorate ions. Results showed that the initial solution pH was an important factor influencing the chlorate adsorption. The adsorption behavior of chlorate followed the Langmuir adsorption isotherm with a maximum adsorption capacity of 18.2 mg/g. The adsorption kinetics of chlorate on CLDH can be described by the pseudo-second-order kinetic model. It was concluded that the CLDH material is a potential adsorbent for the purification of polluted water with chlorate.

Native, acidic pre-treated and composite clay efficiency for the adsorption of dicationic dye in aqueous medium

2016 ◽  
Vol 75 (4) ◽  
pp. 753-764 ◽  
Author(s):  
Asma Ehsan ◽  
Haq Nawaz Bhatti ◽  
Munawar Iqbal ◽  
Saima Noreen
Keyword(s):  
Contact Time ◽  
Dye Adsorption ◽  
Industrial Effluents ◽  
Methyl Green ◽  
Order Kinetic ◽  
Adsorption Efficiency ◽  
Adsorption Behaviors ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Adsorbent Dose

Environmental applications of composites have attracted the interests of researchers due to their excellent adsorption efficiency for pollutants. Native, HCl pre-treated clay and MnFe2O4/clay composite were investigated as an adsorbent for removal of methyl green from aqueous solution. The adsorption behaviors of dye onto native, HCl pre-treated and composite clays were studied as a function of contact time, adsorbent dose, pH, initial dye concentration and temperature. Maximum dye adsorption of 44 mg/g was achieved at pH of 8, contact time 40 min, adsorbent dose 0.20 g/L and initial dye concentration of 125 mg/L using clay composite. The Langmuir isotherm and pseudo-second-order kinetic model best explained the methyl green dye adsorption onto clay adsorbents. Thermodynamic parameters revealed the endothermic and spontaneous adsorption nature of dye. From results, it is concluded that clay has potential for adsorbing methyl green and can be used for the removal of dyes from industrial effluents.

Fabrication and Methyl Blue Adsorption Kinetics of α-Fe2O3 Nanotubes by Electrospinning

2013 ◽  
Vol 699 ◽  
pp. 302-307
Author(s):  
Qiu Ju Wang ◽  
Rui Jiang Liu ◽  
Xiang Qian Shen ◽  
Ding Mei Wu ◽  
He Hao Li
Keyword(s):  
Adsorption Kinetics ◽  
Average Diameter ◽  
Methyl Blue ◽  
Order Kinetic ◽  
Calcination Process ◽  
Hematite Phase ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Xrd Patterns ◽  
Kinetics Of

The α-Fe2O3nanotubes were prepared by the eletrospinning and calcination process. The as-prepared α-Fe2O3nanotubes were characterized by XRD, SEM and BET. The XRD patterns show that the nanotubes with a pure hematite phase (α-Fe2O3) are obtained after calcination at 550 oC. The SEM morphologies and BET measurement demonstrate the nanotubes have an average diameter of 200-300 nm and a specific surface area of 15.1 m2/g. Their adsorption of methyl blue was studied with ultraviolet spectrophotometer (UV) to measure the concentration of methyl blue in aqueous solution, and the adsorption kinetics is basically in agreement with the pseudo-second-order kinetic model in the methyl blue concentration range of 100-300 mg/L.

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