Application of Alginate Extraction Residue for Al(Iii) Ions Biosorption: A Complete Batch System Evaluation

Abstract The residue derived from the alginate extraction from S. filipendula was applied for the biosorption of aluminum from aqueous medium. The adsorptive capacity of the residue (RES) was completely evaluated in batch mode. The effect of pH, contact time, initial concentration and temperature was assessed through kinetic, equilibrium and thermodynamic studies. The biosorbent was characterized prior and post-Al biosorption by N2 physisorption, Hg porosimetry, He picnometry and thermogravimetry analyses. Equilibrium was achieved in 60 minutes. Kinetics obeys pseudo-second order model at aluminum higher concentrations. Isotherms followed Freundlich model at low temperature (293.15 K) and D-R or Langmuir model at higher temperatures (303 and 313 K). Data modeling indicated the occurrence of both chemical and physical interactions in the aluminum adsorption mechanism using RES. The maximum adsorption capacity obtained was of 1.431 mmol/g at 293 K. The biosorption showed a spontaneous, favorable and exotherm character. A simplified batch design was performed, indicating that the residue is a viable biosorbent, achieving high percentages of removal using low biomass dosage.

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Utilization to Remove Pb (II) Ions from Aqueous Environments Using Waste Fish Bones by Ion Exchange

Journal of Chemistry ◽

10.1155/2014/739273 ◽

2014 ◽

Vol 2014 ◽

pp. 1-12 ◽

Cited By ~ 9

Author(s):

Bayram Kizilkaya ◽

A. Adem Tekınay

Keyword(s):

Aqueous Solutions ◽

Adsorption Mechanism ◽

Cost Effective ◽

Isotherm Models ◽

Maximum Adsorption Capacity ◽

Fish Bones ◽

Adsorption Capacities ◽

Aqueous Environments ◽

Equilibrium Data ◽

Pseudo Second Order

Removal of lead (II) from aqueous solutions was studied by using pretreated fish bones as natural, cost-effective, waste sorbents. The effect of pH, contact time, temperature, and metal concentration on the adsorption capacities of the adsorbent was investigated. The maximum adsorption capacity for Pb (II) was found to be 323 mg/g at optimum conditions. The experiments showed that when pH increased, an increase in the adsorbed amount of metal of the fish bones was observed. The kinetic results of adsorption obeyed a pseudo second-order model. Freundlich and Langmuir isotherm models were applied to experimental equilibrium data of Pb (II) adsorption and the value ofRLfor Pb (II) was found to be 0.906. The thermodynamic parameters related to the adsorption process such asEa,ΔG°,ΔH°, andΔS° were calculated andEa,ΔH°, andΔS° were found to be 7.06, 46.01 kJ mol−1, and 0.141 kJ mol−1K−1for Pb (III), respectively.ΔH° values (46.01 kJmol−1) showed that the adsorption mechanism was endothermic. Weber-Morris and Urano-Tachikawa diffusion models were also applied to the experimental equilibrium data. The fish bones were effectively used as sorbent for the removal of Pb (II) ions from aqueous solutions.

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Selective Removal of Hg2+ Ions from Water Using New Functionalized Silica Resin: Equilibrium, Thermodynamics and Kinetic Modeling Studies

Journal of the chemical society of pakistan ◽

10.52568/000588 ◽

2021 ◽

Vol 43 (4) ◽

pp. 436-436

Author(s):

Nida Shams Jalbani Nida Shams Jalbani ◽

Amber R Solangi Amber R Solangi ◽

Shahabuddin Memon Shahabuddin Memon ◽

Ranjhan Junejo Ranjhan Junejo ◽

Asif Ali Bhatti Asif Ali Bhatti

Keyword(s):

Adsorption Capacity ◽

Adsorption Mechanism ◽

Solid Phase ◽

Maximum Adsorption Capacity ◽

Adsorption Phenomenon ◽

Column Adsorption ◽

Pseudo Second Order ◽

Ft Ir ◽

Wastewater Samples ◽

Ft Ir Spectroscopy

In current study, the diphenylaminomethylcalix[4]arene (3) was synthesized and immobilized onto silica surface to prepare a selective, regenerable and stable resin-4. The synthesized resin-4 has been characterized by FT-IR spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX) and Brunauer-Emmett-Teller (BET) techniques. To check the adsorption capacity of resin-4, the batch and column adsorption methodology were applied and it has observed that the resin-4 was selectively removed Hg2+ ions under the optimized parameters. The maximum adsorption capacity was obtained at pH 9 using 25 mg/L of resin-4. Under the optimal conditions, different equilibrium, kinetic and thermodynamic models were applied to experimental data. The results show that adsorption mechanism is chemical in nature following Langmuir model with good correlation coefficient (R2=0.999) and having 712.098 (mmol/g) adsorption capacity. The energy of calculated from D-R model suggests the ion exchange nature of the adsorption phenomenon. Dynamic adsorption experiments were conducted using Thomas model. The maximum solid phase concentration (qo) was 7.5 and rate constant was found to be 0.176 with (R2=0.938) for Hg2+ ions. The kinetic study describes that the adsorption mechanism follows pseudo second order (R2=0.999). The thermodynamic parameters such as ∆H (0.032 KJ/mol) and ∆S (0.127 KJ/mol /K) and ∆G (-5.747,-6.306, -7.027 KJ/mol) shows that the adsorption of Hg2+ ion is endothermic and spontaneous. The reusability of resin-4 was also checked and it has observed that the after 15 cycle only 1.2 % adsorption reduces. Moreover, the resin-4 was applied on real wastewater samples obtained from local industrial zone of Karachi, Sindh-Pakistan.

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Adsorption of Tea Polyphenols using Microporous Starch: A Study of Kinetics, Equilibrium and Thermodynamics

Molecules ◽

10.3390/molecules24081449 ◽

2019 ◽

Vol 24 (8) ◽

pp. 1449 ◽

Cited By ~ 3

Author(s):

Xianchun Hu ◽

Xianfeng Du

Keyword(s):

Physical Adsorption ◽

Tea Polyphenols ◽

Adsorptive Capacity ◽

Partial Hydrolysis ◽

Maximum Adsorption Capacity ◽

Solution Ph ◽

Long Term Storage ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ft Ir

Microporous starch (MPS) granules were formed by the partial hydrolysis of starch using α–amylase and glucoamylase. Due to its biodegradability and safety, MPS was employed to adsorb tea polyphenols (TPS) based on their microporous characteristics. The influences of solution pH, time, initial concentration and temperature on the adsorptive capacity were investigated. The adsorption kinetics data conformed to the pseudo second–order kinetics model, and the equilibrium adsorption data were well described by the Langmuir isotherm model. According to the fitting of the adsorption isotherm formula, the maximum adsorption capacity of TPS onto MPS at pH 6.7 and T = 293 K was approximately 63.1 mg/g. The thermodynamic parameters suggested that the adsorption of TPS onto MPS was spontaneous and exothermic. Fourier transform infrared (FT–IR) analysis and the thermodynamics data were consistent with a physical adsorption mechanism. In addition, MPS-loaded TPS had better stability during long-term storage at ambient temperature.

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Adsorption of tricresyl phosphate onto graphene nanomaterials from aqueous solution

Water Science & Technology ◽

10.2166/wst.2017.317 ◽

2017 ◽

Vol 76 (6) ◽

pp. 1565-1573 ◽

Cited By ~ 1

Author(s):

Jun Liu ◽

Siying Xia ◽

Xiaomeng Lü ◽

Hongxiang Shen

Keyword(s):

Experimental Data ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Tricresyl Phosphate ◽

Batch Mode ◽

Order Kinetic Model ◽

Endothermic Process ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Increasing Temperature

Phosphorus flame retardant tricresyl phosphate (TCP) adsorption on graphene nanomaterials from aqueous solutions was explored using batch and column modes. Comparative studies were performed regarding the kinetics and equilibrium of TCP adsorption on graphene oxide (GO) and graphene (G) in batch mode. The adsorption kinetics exhibited a rapid TCP uptake, and experimental data were well described by the pseudo-second-order kinetic model. Adsorption isotherm data of TCP on the two adsorbents displayed an improved TCP removal performance with increasing temperature at pH 5, while experimental data were well described by the Langmuir isotherm model with a maximum adsorption capacity of 87.7 mg·g−1 for G, and 30.7 mg·g−1 for GO) at 303 K. The thermodynamic parameters show that the adsorption reaction is a spontaneous and endothermic process. In addition, dynamic adsorption of TCP in a fixed G column confirmed a faster approach to breakthrough at high flow rate, high influent TCP concentration, and low filling height of adsorbent. Breakthrough data were successfully described by the Thomas and Yoon-Nelson models.

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A slow pyrolysis biochar derived from Tetrapanax papyriferum petiole as an effective sorbent for removing copper ions from aqueous solution

BioResources ◽

10.15376/biores.14.2.4430-4453 ◽

2019 ◽

Vol 14 (2) ◽

pp. 4430-4453

Author(s):

Wenqi Li ◽

Liping Zhang ◽

Ying Guan ◽

Zhihan Tong ◽

Xiang Chen ◽

...

Keyword(s):

Aqueous Solution ◽

Adsorption Mechanism ◽

Adsorption Process ◽

Copper Ions ◽

Maximum Adsorption Capacity ◽

Transmission Electron ◽

Tetrapanax Papyriferum ◽

Pseudo Second Order ◽

Nanopore Structure ◽

Effective Sorbent

Biochar derived from Tetrapanax papyriferum petioles at different pyrolysis temperatures was used to remove copper from aqueous solution. Abundant porous structures were observed with scanning electron microscopy, and transmission electron microscope images revealed a unique layered nanopore structure. A high pyrolytic temperature resulted in a biochar with a higher surface area, ash content, and mineral element content. The maximum adsorption capacity of T. papyriferum petiole biochar (TBC) was 182 mg/g. The Langmuir adsorption isotherm model and pseudo-second-order kinetics model were most suitable for describing the adsorption process, indicating that adsorption takes place at specific homogeneous sites within the adsorbent. The calculated ΔH° values indicated that the adsorption process was endothermic. The adsorption mechanism for TBC was attributed to precipitation, ion exchange, C-π interactions, and complexation. Thus, the biochar used in this study is a promising environmentally friendly and effective adsorbent for removing Cu2+ ions from an aqueous solution.

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Crystal Violet Dye Adsorption from Aqueous Solution using Activated Chickpea Husk (Cicer arientum)

Asian Journal of Chemistry ◽

10.14233/ajchem.2022.23444 ◽

2021 ◽

Vol 34 (1) ◽

pp. 104-110

Author(s):

Sonia Rani ◽

Sudesh Chaudhary

Keyword(s):

Crystal Violet ◽

Adsorption Mechanism ◽

Dye Adsorption ◽

Second Order ◽

Order Model ◽

Batch Mode ◽

After Effects ◽

Crystal Violet Dye ◽

Pseudo Second Order ◽

Second Order Model

The chickpea husk (Cicer arientum) were activated by chemical modification with sulphuric acid, for its application as biosorbent for the remediation of crystal violet dye from wastewater. Activated chickpea husk (ACH) was characterized for its chemical structure and morphology using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The after effects of leading affecting parameters like dose of adsorbent, time of contact, pH and concentration were studied by commencing experiments in batch mode. Adsorption mechanism and sorption efficiency of ACH was examined using variety of isotherms (Langmuir & Freundlich) and kinetic models (pseudo first order and pseudo second order). Experimental data for adsorption rate was in good harmony with the results obtained using pseudo second order model. The adsorption capacity determined using Langmuir isotherm and pseudo second order model was found to be 142.85 mg/g.

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Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

Materials ◽

10.3390/ma12111734 ◽

2019 ◽

Vol 12 (11) ◽

pp. 1734 ◽

Cited By ~ 12

Author(s):

Abel Adekanmi Adeyi ◽

Siti Nurul Ain Md Jamil ◽

Luqman Chuah Abdullah ◽

Thomas Shean Yaw Choong ◽

Kia Li Lau ◽

...

Keyword(s):

Methylene Blue ◽

Acrylic Acid ◽

Morphological Properties ◽

Aquatic Environments ◽

Maximum Adsorption Capacity ◽

Freundlich Model ◽

Physico Chemical ◽

Pseudo Second Order ◽

Ft Ir ◽

Poly Acrylonitrile

The paper evaluates the adsorptive potential of thiourea-modified poly(acrylonitrile-co-acrylic acid), (TA-poly(AN-co-AA)) for the uptake of cationic methylene blue (MB) from aquatic environments via a batch system. TA-poly(AN-co-AA) polymer was synthesized through redox polymerization and modified with thiourea (TA) where thioamide groups were introduced to the surface. Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), CHNS and Zetasizer were used to characterize the physico-chemical and morphological properties of prepared TA-poly(AN-co-AA). Afterwards, it was confirmed that incorporation of thioamide groups was successful. The adsorption kinetics and equilibrium adsorption data were best described, respectively, by a pseudo-second-order model and Freundlich model. Thermodynamic analysis showed the exothermic and spontaneous nature of MB uptake by TA-poly(AN-co-AA). The developed TA-poly(AN-co-AA) polymer demonstrated efficient separation of MB dye from the aqueous solution and maintained maximum adsorption capacity after five regeneration cycles. The findings of this study suggested that synthesized TA-poly(AN-co-AA) can be applied successfully to remove cationic dyes from aquatic environments.

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Adsorption kinetics and thermodynamics of acid Bordeaux B from aqueous solution by graphene oxide/PAMAMs

Water Science & Technology ◽

10.2166/wst.2015.328 ◽

2015 ◽

Vol 72 (7) ◽

pp. 1217-1225 ◽

Cited By ~ 6

Author(s):

Fan Zhang ◽

Shengfu He ◽

Chen Zhang ◽

Zhiyuan Peng

Keyword(s):

Graphene Oxide ◽

Adsorption Capacity ◽

Ph Value ◽

Maximum Adsorption Capacity ◽

Freundlich Model ◽

Equilibrium Data ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Effects Of Media ◽

Better Than

Graphene oxide/polyamidoamines dendrimers (GO/PAMAMs) composites were synthesized via modifying GO with 2.0 G PAMAM. The adsorption behavior of the GO/PAMAMs for acid Bordeaux B (ABB) was studied and the effects of media pH, adsorption time and initial ABB concentration on adsorption capacity of the adsorbent were investigated. The optimum pH value of the adsorption of ABB onto GO/PAMAMs was 2.5. The maximum adsorption capacity increased from 325.78 to 520.83 mg/g with the increase in temperature from 298 to 328 K. The equilibrium data followed the Langmuir isotherm model better than the Freundlich model. The kinetic study illustrated that the adsorption of ABB onto GO/PAMAMs fit the pseudo-second-order model. The thermodynamic parameters indicated that the adsorption process was physisorption, and also an endothermic and spontaneous process.

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Adsorptive removal of Ni2+ and Cd2+ from wastewater using a green longan hull adsorbent

Adsorption Science & Technology ◽

10.1177/0263617417722254 ◽

2017 ◽

Vol 36 (1-2) ◽

pp. 762-773 ◽

Cited By ~ 4

Author(s):

Xingmei Guo ◽

Sihan Tang ◽

Yan Song ◽

Junmin Nan

Keyword(s):

Metal Ions ◽

Adsorption Capacity ◽

Adsorption Mechanism ◽

Maximum Adsorption Capacity ◽

Adsorptive Removal ◽

Langmuir Adsorption ◽

Monolayer Adsorption ◽

Pseudo Second Order ◽

Adsorptive Mechanism ◽

Optimized Conditions

The adsorptive removal of Ni2+ and Cd2+ at concentrations of approximately 50 mg L−1 in wastewater is investigated using an agricultural adsorbent, longan hull, and the adsorptive mechanism is characterized. The maximum adsorption capacity of approximately 4.19 mg g−1 Cd2+ was obtained under the optimized conditions of room temperature, pH 5.0, and a solid-to-liquid ratio of 1:30 in approximately 15 min. For Ni2+, the maximum adsorption capacity of approximately 3.96 mg g−1 was obtained at pH 4.7 in approximately 20 min. The adsorption kinetics for both metal ions on the longan hull can be described by a pseudo second-order rate model and are well fitted to the Langmuir adsorption isotherm. The adsorption mechanism of the longan hull to Ni2+ and Cd2+ ions is shown to be a monolayer adsorption of metal ions onto the absorbent surface. Thereinto, the longan hull adsorbent contains N–H, C–H, C=O, and C=C functional groups that can form ligands when loaded with Ni2+ and Cd2+, which reduces the fluorescence of the dried longan hull material.

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Effective removal of Pb2+ from oral medical wastewater via an activated three-dimensional framework carbon (3D AFC)

Applied Water Science ◽

10.1007/s13201-021-01486-2 ◽

2021 ◽

Vol 11 (9) ◽

Author(s):

Fuxiang Song ◽

Na Wang ◽

Zezhou Hu ◽

Zhen Zhang ◽

Xiaoxue Mai ◽

...

Keyword(s):

Adsorption Capacity ◽

Three Dimensional ◽

High Specific Surface Area ◽

Maximum Adsorption Capacity ◽

Freundlich Model ◽

Dimensional Network ◽

Effective Removal ◽

Strong Adsorption ◽

Pseudo Second Order ◽

Main Material

AbstractOral medical wastewater with heavy metal ions (such as plumbum, Pb2+) is regarded as the main pollutant produced in the oral cavity diagnosis, and the treatment process can pose a serious threat to human health. The removal of Pb2+ from oral medical wastewater facing major difficulties and challenges. Therefore, it is of great significance to take effective measures to remove Pb2+ by using effective methods. A new activated three-dimensional framework carbon (3D AFC), regarded as the main material to remove Pb2+ in the oral medical wastewater, has been fabricated successfully. In this experiment, the effects of 3D AFC absorbing Pb2+ under different conditions (including solid-to-liquid ratio, pH, ionic strength, contact time, and initial concentration, etc.) were discussed. And the result revealed that the adsorption kinetics process of Pb2+ on 3D AFC conformed to the pseudo-second-order model and the adsorption isotherm conformed to the Freundlich model. Under the condition that pH = 5.5 and T = 298 k, the calculated maximum adsorption capacity of 3D AFC for Pb2+ was 270.88 mg/g. In practical application, it has strong adsorption ability for Pb2+ in oral medical wastewater. Thus, 3D AFC shows promise for Pb2+ remove and recovery applications because of high adsorption capacity for Pb2+ in oral medical wastewater due to its high specific surface area, outstanding three-dimensional network structure.

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