ADSORPTION OF CEFIXIME TRIHYDRATE ONTO CHITOSAN 10B FROM AQUEOUS SOLUTION: KINETIC, EQUILIBRIUM AND THERMODYNAMIC STUDIES

An efficient and biodegradable adsorbent chitosan 10B was used to eliminate cefixime trihydrate from aqueous solution. The kinetic behavior of cefixime trihydrate adsorption onto chitosan 10B was studied in aqueous medium, from various operational aspects, such as contact time, solution pH, antibiotic concentrations, and temperatures. Cefixime adsorption onto chitosan 10B was confirmed by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM) and energy-dispersive X-ray spectroscopy (EDX). The antibiotic adsorption kinetics obeyed a pseudo-second-order model rather than pseudo-first-order and Elovich kinetic models. The best illustration of antibiotic adsorption equilibrium was made by the Langmuir model, with the highest adsorption ability qm: 37.04 μmol/g at 298 K. The activation energy (Ea) of the present adsorption system was computed to be 44.18 kJ/mol. The values of activation (ΔG‡, ΔH‡ and ΔS‡) and thermodynamic (ΔG, ΔH and ΔS) parameters confirmed that the cefixime trihydrate adsorption onto chitosan 10B in aqueous medium is an exothermic physisorption process. Cefixime desorption from antibiotic-loaded chitosan 10B was performed in 0.1 M NaOH solution and the recycled adsorbent was utilized for a second time without significant loss of its adsorption capacity.

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Synthesis of magnetic alginate beads based on magnesium ferrite (MgFe2O4) nanoparticles for removal of Sr (II) from aqueous solution: kinetic, equilibrium and thermodynamic studies

Water Science & Technology ◽

10.2166/wst.2018.228 ◽

2018 ◽

Vol 77 (11) ◽

pp. 2714-2722 ◽

Cited By ~ 5

Author(s):

Sobhy M. Yakout ◽

Mohamed R. Hassan ◽

Mohamed I. Aly

Keyword(s):

Electron Microscopy ◽

Aqueous Solution ◽

Alginate Beads ◽

Magnesium Ferrite ◽

Order Model ◽

Strontium Removal ◽

Transmission Electron ◽

Pseudo Second Order ◽

Solution Kinetic ◽

Kinetic Equilibrium

Abstract Novel magnetic alginate beads (MagAlgbeads) have been developed by incorporation of magnesium ferrite (MgFe2O4) in alginate beads with the aim of using them in the removal of strontium from aqueous solution. MagAlgbeads were characterized by transmission electron microscopy, scanning electron microscopy, X-ray fluorescence and Fourier transform infrared spectroscopy. The adsorption of strontium onto MagAlgbeads were found to depend on pH and strontium removal increases with increasing pH until pH is 6. Strontium adsorption kinetics run through pseudo-second-order model. Thermodynamically, strontium adsorption was endothermic and spontaneous. Langmuir isotherm gave good fitting for strontium removal with adsorption capacity of 505.5 mg/g. These results proved that the prepared MagAlgbeads are very efficient material for strontium adsorption.

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Preparation of bio-based magnetic adsorbent and application for efficient removal of Cd(II) from water

Water Science & Technology ◽

10.2166/wst.2018.007 ◽

2018 ◽

Vol 77 (5) ◽

pp. 1313-1323 ◽

Cited By ~ 1

Author(s):

Jianjun Zhou ◽

Xionghui Ji ◽

Xiaohui Zhou ◽

Jialin Ren ◽

Yaochi Liu

Keyword(s):

Aqueous Solution ◽

Adsorption Process ◽

Low Cost ◽

Maximum Adsorption Capacity ◽

Magnetic Adsorbent ◽

Order Model ◽

Efficient Removal ◽

Adsorption Ability ◽

Adsorption Sites ◽

Pseudo Second Order

Abstract A novel magnetic bio-adsorbent (MCIA) was developed, characterized and tested for its Cd(II) removal from aqueous solution. MCIA could be easily separated from the solution after equilibrium adsorption due to its super-paramagnetic property. The functional and magnetic bio-material was an attractive adsorbent for the removal of Cd(II) from aqueous solution owing to the abundant adsorption sites, amino-group and oxygen-containing groups on the surface of Cyclosorus interruptus. The experimental results indicated that the MCIA exhibited excellent adsorption ability and the adsorption process was spontaneous and endothermic. The adsorption isotherm was consistent with the Langmuir model. The adsorption kinetic fitted the pseudo-second-order model very well. The maximum adsorption capacity of Cd(II) onto MCIA was 40.8, 49.4, 54.6 and 56.6 mg/g at 293, 303, 313 and 323 K, respectively. And the MCIA exhibited an excellent reusability and impressive regeneration. Therefore, MCIA could serve as a sustainable, efficient and low-cost magnetic adsorbent for Cd(II) removal from aqueous solution.

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Removal of copper ions from aqueous solution using NaOH-treated rice husk

Emergent Materials ◽

10.1007/s42247-020-00126-w ◽

2020 ◽

Vol 3 (6) ◽

pp. 857-870

Author(s):

Shagufta Zafar ◽

Muhammad Imran Khan ◽

Mushtaq Hussain Lashari ◽

Majeda Khraisheh ◽

Fares Almomani ◽

...

Keyword(s):

Aqueous Solution ◽

Rice Husk ◽

Contact Time ◽

Copper Ions ◽

Analytical Techniques ◽

First Order ◽

Freundlich Isotherms ◽

Naoh Solution ◽

Pseudo Second Order ◽

Pseudo First Order

AbstractThe present study investigates the removal of copper ions (Cu (II)) from aqueous solution using chemically treated rice husk (TRH). The chemical treatment was carried out using NaOH solution and the effect of contact time (tc), adsorbent dosage (Dad), initial Cu (II) concentration ([Cu]i), and temperature (T) on the percentage removals of Cu (II) (%RCu) were investigated. Different analytical techniques (FTIR, SEM, and EDX) were used to confirm the adsorption (ads) of Cu (II) onto the TRH. The ads kinetics was tested against pseudo-first-order (PFO) and pseudo-second-order (PSO) models as well as Langmuir and Freundlich isotherms. Treating RH with NaOH altered the surface and functional groups, and on the surface of RH, the ionic ligands with high electro-attraction to Cu increased and thus improved the removal efficiency. The %RCu decreased by increasing the [Cu]i and increased by increasing the ct, Dad, and T. Up to 97% Cu removal was achieved in ct of 30 min using Dad of 0.3 g [Cu]i of 25 mg L−1 and T = 280 K. The ads of Cu on TRH is endothermic, spontaneous, follows Langmuir isotherms, and exhibited a PSO kinetics. Moreover, the TRH was successfully regenerated and used for further adsorption cycles using 1 M HNO3.

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Removal of Strontium Ions from Aqueous Solution by Sunflower Straw

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.1922 ◽

2013 ◽

Vol 726-731 ◽

pp. 1922-1925 ◽

Cited By ~ 1

Author(s):

Lian Ai ◽

Xue Gang Luo ◽

Xiao Yan Lin ◽

Si Zhao Zhang

Keyword(s):

Aqueous Solution ◽

Batch Adsorption ◽

Order Model ◽

Solution Ph ◽

Sorption Data ◽

Freundlich Model ◽

Pseudo Second Order ◽

Ft Ir ◽

Sunflower Straw ◽

Langmuir And Freundlich Models

The sorptive potential of sunflower straw (≤125 μm) for Sr2+ from aqueous solution was evaluated. Batch adsorption experiments were carried out as a function of solution pH, adsorbent dosage, Sr2+ concentration and contact time. FT-IR spectra and SEM of sunflower straw were employed to explore the functional groups available for the binding of Sr2+ and morphology of the adsorbent. Maximum uptake capacity of sunflower straw was 17.48 mg/g occurred at around pH 3-7. The adsorption equilibrium can be achieved within 5 min and kinetic data were fitted well to pseudo-second-order model. The Langmuir and Freundlich models were applied to describe isotherm sorption data. The Langmuir model gave an acceptable fit than Freundlich model.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.2736 ◽

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).

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Treatment of effluent from fertilizer industry by adsorption on willow sawdust-removal of Ni(II) and Cd(II) from the effluent

Ion Exchange Letters ◽

10.35933/iel.2021.13.001 ◽

2021 ◽

pp. 1-12

Author(s):

Raafia Najam ◽

Syed Muzaffar Ali Andrabi

Keyword(s):

Aqueous Solution ◽

Adsorption Process ◽

Low Cost ◽

Second Order ◽

Maximum Adsorption Capacity ◽

Solution Ph ◽

The World ◽

Pseudo Second Order ◽

Almost All ◽

Willow Tree

Sawdust of willow has been investigated as an adsorbent for the removal of Ni(II), and Cd(II) ions from aqueous solution. Since willow tree is widely grown in almost all parts of Kashmir, it can be a common most easily available, sustainable, low cost adsorbent for the treatment of wastewaters in this part of the world where growing industrialization is affecting water quality like elsewhere in the world. Therefore, it is worthwhile to investigate the potential of sawdust of willow tree as an adsorbent for the removal of Ni(II) and Cd(II) ions from aqueous solution as a first step. Batch experiments were conducted to study the effect of some parameters such as contact time, initial concentration of metal ions, solution pH and temperature. Langmuir and Freundlich models were employed for the mechanistic analysis of experimental data obtained. Results reveal that in our system adsorption follows the Langmuir isotherm. The maximum adsorption capacity of Ni(II) and Cd(II) were found to be 7.98 and 7.11 mg/g respectively at optimum conditions. The pseudo-ﬁrst-order and pseudo-second-order models were employed for kinetic analysis of adsorption process. The adsorption process follows pseudo-second-order kinetics. The efficacy of the adsorbent in the treatment of effluent from fertilizer factory has been investigated and the results have been found encouraging.

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Synthesis of Iron-Modified Biochar Derived from Rice Straw and Its Application to Arsenic Removal

Journal of Chemistry ◽

10.1155/2019/5295610 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Thi Hanh Nguyen ◽

Thi Huong Pham ◽

Hong Tham Nguyen Thi ◽

Thi Nham Nguyen ◽

Minh-Viet Nguyen ◽

...

Keyword(s):

Aqueous Solution ◽

Rice Straw ◽

Arsenic Removal ◽

Order Model ◽

Solution Ph ◽

Environmentally Sustainable ◽

Modified Biochar ◽

Removal Capacity ◽

Pseudo Second Order ◽

Edx Analyses

A novel iron-modified biochar (FMBC) derived from rice straw was synthesized using FeCl3 modification for efficient As(V) removal from aqueous solution. FTIR and SEM-EDX analyses were carried out to determine the mechanism involved in the removal process and also demonstrated that Fe had loaded successfully on the surface of modified biochar. The iron-modified biochar showed higher arsenic removal ability than the raw biochar. The iron-modified biochar showed a maximum adsorption with an initial solution pH of 5.0. Moreover, for the tested biochar, the As(V) removal kinetics data were well fitted by the pseudo-second-order model. Furthermore, the As(V) removal data upon being well fitted by the Langmuir model showed the maximal removal capacity of 28.49 mg/g. The simple preparation process and high adsorption performance suggest that the iron-modified biochar derived from rice straw could be served as an effective, inexpensive, and environmentally sustainable adsorbent to replace typical granular activated carbon (AC) for As(III) removal from aqueous solution.

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Study of the kinetics and the adsorption isotherm of cadmium(II) from aqueous solution using green algae (Ulva lactuca) biomass

Water Science & Technology ◽

10.2166/wst.2015.359 ◽

2015 ◽

Vol 72 (9) ◽

pp. 1505-1515 ◽

Cited By ~ 9

Author(s):

H. Asnaoui ◽

A. Laaziri ◽

M. Khalis

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

Low Cost ◽

Freundlich Isotherm ◽

Second Order ◽

Ulva Lactuca ◽

Order Kinetic ◽

Solution Ph ◽

Algae Biomass ◽

Pseudo Second Order

Batch experiments were conducted to study the adsorption of hazardous cadmium onto low-cost algae biomass in aqueous solution with respect to concentration of adsorbate, adsorbent dosage, contact time, solution pH and temperature. Langmuir and Freundlich adsorption models were applied to describe the equilibrium isotherms and the isotherm constants were determined. The activation energy of adsorption was also evaluated for the adsorption of cadmium onto Ulva lactuca biomass. Experimental data were tested in terms of biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. The results showed that the biosorption processes of Cd(II) followed well pseudo-second-order kinetics. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the metal ions by Ulva lactuca biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The biosorption capacity of Ulva lactuca biomass for cadmium was found to be 3.02 mg/g at pH 5.60 min equilibrium time and 20 °C. The mean free energy which was calculated was 6.24 kJ/mol for Cd(II) biosorption, which shows that the adsorption is physical. The calculated thermodynamic parameters (ΔG0, ΔH0 and ΔS0) showed that the biosorption of Cd(II) onto Ulva lactuca biomass was feasible, spontaneous and exothermic under examined conditions. The results indicate that algae Ulva lactuca could be employed as a low-cost material for the removal of metal ions from aqueous solution.

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Dye removal from aqueous solution by raw maize corncob and H3PO4 activated maize corncob

Journal of Water Reuse and Desalination ◽

10.2166/wrd.2017.179 ◽

2017 ◽

Vol 8 (2) ◽

pp. 214-224 ◽

Cited By ~ 5

Author(s):

M. Farnane ◽

H. Tounsadi ◽

A. Machrouhi ◽

A. Elhalil ◽

F. Z. Mahjoubi ◽

...

Keyword(s):

Aqueous Solution ◽

Order Kinetic ◽

Solution Ph ◽

Adsorption Performance ◽

Adsorption Capacities ◽

Monolayer Adsorption ◽

Equilibrium Data ◽

Order Kinetic Model ◽

Pseudo Second Order ◽

Best Fit

AbstractThe focus of this study is the investigation of removal ability of methylene blue (MB) and malachite green (MG) dyes from aqueous solution by raw maize corncob (RMC) and H3PO4 activated maize corncob (AMC). Maize corncobs were carbonized at 500 °C for 2 h, and then impregnated at a phosphoric acid to maize corncob ratio of 2.5 g/g. The impregnated maize corncob was activated in a tubular vertical furnace at 450 °C for 2 h. Samples were characterized by different methods. Adsorption experiments were carried out as a function of solution pH, adsorbent dosage, contact time, initial concentration of dyes and the temperature. Experimental results show that the activation of maize corncob boosts four times the adsorption performance for the selected dyes. The adsorption process is very rapid and was pH dependent with high adsorption capacities in the basic range. The kinetic data were fitted with the pseudo-second-order kinetic model. The best fit of equilibrium data was obtained by the Langmuir model with maximum monolayer adsorption capacities of 75.27 and 271.19 mg/g for MB, 76.42 and 313.63 mg/g for MG, respectively, in the case of RMC and AMC. The temperature did not have much influence on the adsorption performance.

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Biosorption of Cr(VI) ions from aqueous solutions by a newly isolated Bosea sp. strain Zer-1 from soil samples of a refuse processing plant

Canadian Journal of Microbiology ◽

10.1139/cjm-2014-0719 ◽

2015 ◽

Vol 61 (6) ◽

pp. 399-408 ◽

Cited By ~ 6

Author(s):

Huining Zhang ◽

Li Liu ◽

Qing Chang ◽

Hongyu Wang ◽

Kai Yang

Keyword(s):

Aqueous Solution ◽

Metal Ions ◽

Removal Efficiency ◽

Bacterial Biomass ◽

Processing Plant ◽

Solution Ph ◽

Freundlich Model ◽

Pseudo Second Order ◽

Removal Of Metal Ions ◽

Maximum Removal

The adsorption behavior of Cr(VI) ions from aqueous solution by a chromium-tolerant strain was studied through batch experiments. An isolate designated Zer-1 was identified as a species of Bosea on the basis of 16S rRNA results. It showed a maximum resistance to 550 mg·L−1 Cr(VI). The effects of 3 important operating parameters, initial solution pH, initial Cr(VI) concentration, and biomass dose, were investigated by central composite design. On the basis of response surface methodology results, maximal removal efficiency of Cr(VI) was achieved under the following conditions: pH, 2.0; initial concentration of metal ions, 55 mg·L−1; and biomass dose, 2.0 g·L−1. Under the optimal conditions, the maximum removal efficiency of Cr(VI) ions was found to be nearly 98%. The experimental data exhibited a better fit with the Langmuir model than the Freundlich model. The biosorption mechanisms were investigated with pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetics models. These results revealed that biosorption of Cr(VI) onto bacterial biomass could be an alternative method for the removal of metal ions from aqueous solution.

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