A GREEN METHOD FOR THE REMOVAL OF ZINC(II) IONS FROM WASTEWATER USING MODIFED BIOPOLYMERS

Zinc pollution in wastewater is a global problem because it is highly toxic. Zinc is commonly used in industries that transfer the water containing zinc directly into water sources, leading to pollution. Exposure to a high level of zinc causes major health problems. This study evaluated the adsorption of zinc ions from aqueous system using modified biopolymers of chitosan by crosslinking with sulphates using the batch adsorption method; the concentration was determined using atomic absorption spectrophotometry. The sulphate cross-linked chitosan (SCC) was characterised by several method. The effects of various experimental parameters such as pH, contact time, concentration, adsorbent dosage and temperature were investigated. Under the optimised conditions, the percentage efficiency for the removal of zinc(II) was up to 85%. Freundlich and Langmuir isotherms were used to analyse the equilibrium adsorption data along with kinetic studies. Various thermodynamic parameters have also been reported.

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The Chicken Utilization Of Î‘-Keratin Of Waste Chicken Feathers In Enviromental As Adsorben Of Procion Red And Remazol Yellow Dye

Science Proceedings Series ◽

10.31580/sps.v1i3.865 ◽

2019 ◽

Vol 1 (3) ◽

pp. 12-14

Author(s):

SAGA DERMAWAN DWI LAKSANA ◽

ERICK RYAN YULIANTO ◽

EDI PRAMONO

Keyword(s):

Contact Time ◽

Freundlich Isotherm ◽

Batch Adsorption ◽

Adsorption Method ◽

Chicken Feathers ◽

Vis Spectroscopy ◽

Experimental Parameters ◽

Dye Absorption ◽

Red Dye

as the adsorbent. The adsorption characterization of activated chicken feathers by Na2S 0.1 N and non-activated chicken feathers was determined. Effect of variation experimental parameters pH, Contact time and variation dye concentration also being investigated in a batch adsorption method. Procion and Remazol Yelloow were characterized by UV-Vis spectroscopy VV The results show that the contact time and pH condition for adsorption equilibrium are 120 min for activated chicken feathers and 100 min for chicken feathers which were not activated by Na2S at pH 3. Procion red dye absorption by activated and not activated chicken feathers follows Freundlich isotherm and follow Langmuir isothrem. For remazol yellow dye absorption by activated and not activated chicken feathers follows Langmuir isotherm and Freundlich isothrem and the reaction kinetics follow the Ho equation. Keywords: adsorption, chicken feather, procion red, remazol yellow

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Release of toxic methylene blue from water by mesoporous silicalite-1: characterization, kinetics and isotherm studies

Applied Water Science ◽

10.1007/s13201-021-01435-z ◽

2021 ◽

Vol 11 (7) ◽

Author(s):

Sabarish Radoor ◽

Jasila Karayil ◽

Aswathy Jayakumar ◽

Jyotishkumar Parameswaranpillai ◽

Suchart Siengchin

Keyword(s):

Electron Microscopy ◽

Contact Time ◽

Dye Removal ◽

Batch Adsorption ◽

Aqueous Environment ◽

Order Kinetic ◽

Adsorption Method ◽

X Ray ◽

Ft Ir ◽

Adsorption Desorption

AbstractIn the present work, we have developed a mesoporous silicalite-1 using CMC as a template for the removal of MB from aqueous solution. The synthesized silicalite-1 were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), Energy-dispersive X-ray spectroscopy (EDAX) and N2 adsorption–desorption isotherm (BET). XRD and FT-IR analysis confirmed the formation of crystallinity and development of MFI structure in the mesoporous silicalite-1. The adsorption of MB dye on mesoporous silicalite-1 was conducted by batch adsorption method. The effect of various parameters such as adsorbent dosage, initial dye concentration, contact time and temperature on the dye uptake ability of silicalite-1 was investigated. The operating parameters for the maximum adsorption are silicalite-1 dosage (0.1 wt%), contact time (240 min), initial dye concentration (10 ppm) and temperature (30 ℃). The MB dye removal onto mesoporous silicalite-1 followed pseudo-second-order kinetic and Freundlich isotherm. The silicalite-1 exhibits 86% removal efficiency even after six adsorption–desorption cycle. Therefore, the developed mesoporous silicalite-1 is an effective eco-friendly adsorbent for MB dye removal from aqueous environment.

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Removal of Cadmium(II) from Water using Modified Citrus limettioides Peels: Thermodynamic and Isotherm Studies

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22278 ◽

2019 ◽

Vol 32 (1) ◽

pp. 73-78

Author(s):

P. Janaki ◽

R. Sudha ◽

T.S. Sribharathi ◽

P. Anitha ◽

K. Poornima ◽

...

Keyword(s):

Adsorption Process ◽

Low Cost ◽

Raw Material ◽

Isotherm Models ◽

Batch Adsorption ◽

Adsorption Method ◽

Chemically Modified ◽

Adsorption Performance ◽

Monolayer Adsorption ◽

Isotherm Equations

The adsorption performance of sulphuric acid treated low cost adsorbent synthesized by using Citrus limettioides peel as an effective raw material for the removal of cadmium(II) from water. The batch adsorption method was carried out to optimize some parameters like contact time, pH and adsorbent dose. The nonlinear isotherm equations were used to calculate the different isotherm constant of five isotherm models namely Freundlich, Langmuir, Dubinin-Radushkevich, Redlich-Peterson and Sips. The Langmuir monolayer adsorption capacity of chemically modified Citrus limettioides peel was found to be 287.60 mg g-1. The negative values of ΔGº and ΔHº showed that the adsorption process is spontaneous and exothermic.

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Micellar Electrokinetic Chromatographic Study of the Separation of an Aromatase Inhibitor and a Tryciclic Antidepressant in the Breast Cancer Treatment

Analytical Chemistry Insights ◽

10.4137/aci.s939 ◽

2008 ◽

Vol 3 ◽

pp. ACI.S939 ◽

Cited By ~ 5

Author(s):

J. Rodríguez Flores ◽

A.M. Contento Salcedo ◽

L. Muñoz Fernández

Keyword(s):

Micellar Electrokinetic Chromatography ◽

Solid Phase ◽

Background Electrolyte ◽

Kinetic Studies ◽

Breast Cancer Treatment ◽

Chromatographic Study ◽

Optimal Conditions ◽

Sodium Dodecylsulphate ◽

Experimental Parameters

Micellar electrokinetic chromatography (MEKC) was investigated for the simultaneous determination of letrozole, imipramine and their metabolites in human urine samples over a concentration range of therapeutic interest. Experimental parameters such as pH of the running electrolyte, sodium dodecylsulphate (SDS) concentration, borate concentration, voltage, etc were investigated. Under optimal conditions of 25 mM SDS, 15 mM borate buffer (pH 9.2), 15% 2-propanol, as background electrolyte; 28 kV and 40 °C, as voltage and cartridge temperature, respectively; resolution between the peaks was greater than 1.7. Before the determination, a solid phase extraction (SPE) procedure with a C18 cartridge was optimized. Good linearity, accuracy, precision, robustness and ruggedness were achieved and detection limits of 12.5 ng/mL for letrozole and its metabolite and 37.5 ng/mL, were obtained for imipramine and their metabolites. Real determinations of these analytes in two patient urines were carried out. Sensitivity achieved in this method is sufficient to perform kinetic studies in humans.

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Adsorption of Nitrate onto ZnCl2-Modified Coconut Granular Activated Carbon: Kinetics, Characteristics, and Adsorption Dynamics

Advances in Materials Science and Engineering ◽

10.1155/2018/1939032 ◽

2018 ◽

Vol 2018 ◽

pp. 1-12 ◽

Cited By ~ 4

Author(s):

Lingjie Liu ◽

Min Ji ◽

Fen Wang

Keyword(s):

Activated Carbon ◽

Granular Activated Carbon ◽

Kinetic Studies ◽

Surface Characteristics ◽

Electrostatic Attraction ◽

Batch Adsorption ◽

Dynamic Adsorption ◽

Batch Experiments ◽

Nitrate Adsorption ◽

Pseudo Second Order

Coconut granular activated carbon (CGAC) was modified by impregnating with ZnCl2solution to remove nitrate from aqueous solutions. Sorption isotherm and kinetic studies were carried out in a series of batch experiments. Nitrate adsorption of both ZnCl2-modified CGAC and CGAC fitted the Langmuir and Freundlich models. Batch adsorption isotherms indicated that the maximum adsorption capacities of ZnCl2-modified CGAC and CGAC were calculated as 14.01 mgN·g−1and 0.28 mgN·g−1, respectively. The kinetic data obtained from batch experiments were well described by pseudo-second-order model. The column study was used to analyze the dynamic adsorption process. The highest bed adsorption capacity of 1.76 mgN·g−1was obtained by 50 mgN·L−1inlet nitrate concentration, 20 g adsorbents, and 10 ml·min−1flow rate. The dynamic adsorption data were fitted well to the Thomas and Yoon–Nelson models with coefficients of correlationR2 > 0.834 at different conditions. Surface characteristics and pore structures of CGAC and ZnCl2-modified CGAC were performed by SEM and EDAX and BET and indicated that ZnCl2had adhered to the surface of GAC after modified. Zeta potential, Raman spectra, and FTIR suggested the electrostatic attraction between the nitrate ions and positive charge. The results revealed that the mechanism of adsorption nitrate mainly depended on electrostatic attraction almost without any chemical interactions.

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Removal of Dyes from Wastewater of Artisanal Dyeing Plants by Adsorption in a Fixed Bed Column of Deactivated Lichens

International Research Journal of Pure and Applied Chemistry ◽

10.9734/irjpac/2021/v22i530405 ◽

2021 ◽

pp. 1-11

Author(s):

Kouassi Kouadio Dobi-Brice ◽

Yacouba Zoungranan ◽

Dje Daniel Yannick ◽

Ekou Lynda ◽

Ekou Tchirioua

Keyword(s):

Ivory Coast ◽

Fixed Bed ◽

Batch Adsorption ◽

Real Problem ◽

Adsorption Method ◽

Fixed Bed Column ◽

Good Efficiency ◽

Continuous Adsorption ◽

Column Adsorption ◽

Study Laboratory

Aims: Pollution by wastewaters from various urban activities such as artisanal dyeing plants is a real problem for developing countries. The treatment of wastewater by the adsorption method is carried out by means of less expensive and available adsorbent media. Two techniques of the adsorption method are possible: adsorption in continuous mode (column adsorption) and adsorption in discontinuous mode (batch adsorption). The choice of the continuous adsorption technique is justified by its ability to process large volumes of solutions. In this study, dyes contained in wastewater from artisanal dyeing plants were removed by continuous adsorption in a fixed-bed column of deactivated lichen biomass (Parmotrema dilatatum). Study Design: Random design Place and Duration of Study: Laboratory of Thermodynamics and Environmental Physico-Chemistry (University Nangui Abrogoua, Ivory Coast) between May 2020 and October 2020. Methodology: Four (4) categories of wastewater were collected in artisanal cotton and leather dyeing plants through two municipalities of the city of Abidjan, economic capital of Ivory Coast. Two (2) wastewaters colored in blue from dyeing of cotton boubous and jeans and two (2) wastewaters colored in red from dyeing of leather jackets and bags. These wastewaters were treated through the fixed bed column of deactivated lichens. The column feed rate was set at 0, 07 L.min-1 and the adsorbent bed mass at 100 g. Results: The study showed that, regardless of the nature of the dyed object and regardless of the target dye, the amount of dye adsorbed was better with waters of higher initial concentration. Thus the best amount of adsorbed dye is 44.444 mg.g-1 and the best removal rate is 97.9%. These values are obtained with the red wastewater of bags (RWB) treatment which was the most concentrated wastewater. Conclusion: Good efficiency of deactivated lichen bed as adsorbent for the in situ removal of dyes from wastewater by continuous adsorption.

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Kinetic Studies of Adsorption Process of Zambian Kapiri Mposhi Zeolites

Oriental Journal Of Chemistry ◽

10.13005/ojc/370229 ◽

2021 ◽

Vol 37 (2) ◽

pp. 467-475

Author(s):

Marina G. Xavier

Keyword(s):

Adsorption Process ◽

Kinetic Studies ◽

Solute Concentration ◽

Exchange Property ◽

Batch Adsorption ◽

Reaction Conditions ◽

Kinetics Of Adsorption ◽

Calcination Temperatures ◽

Optimum Reaction ◽

Kinetics Of

Batch adsorption studies were done on aqueous solutions of Pb(NO3)2 at varying solute concentration, adsorbent dose, contact time, temperature, calcination temperatures and pH. Residual concentrations of the solute were found out using AAS and optimum conditions were studied. Adsorbent used in this study is locally available silicate rich mineral which closely resembles zeolites. The net negative charge on the framework of hydrated aluminosilicates is responsible for ion exchange property. Freundlich model was used to validate the results obtained from batch experiments plotting lnCe vs lnqe. Objective of this work is to study the kinetics of adsorption considering the interplay of particle diffusion in addition to proving the effectiveness as an adsorbent. A diffusion model also was also applied apart from kinetic model to analyze the experimental results more specifically. For maximizing the efficiency of the adsorption process and minimizing the time involved, variables like temperature, reactants and pH were manipulated using kinetic studies. It establishes the optimum reaction conditions for various experimental parameters in the process of adsorption.

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The kinetic studies of gold(III) chloride complex adsorption mechanism from an aqueous and semi-aqueous system

Journal of Molecular Liquids ◽

10.1016/j.molliq.2019.01.028 ◽

2019 ◽

Vol 278 ◽

pp. 43-52 ◽

Cited By ~ 1

Author(s):

Marek Wojnicki ◽

Magdalena Luty-Błocho ◽

Robert P. Socha ◽

Zbigniew Pędzich ◽

Stanisław Małecki ◽

...

Keyword(s):

Adsorption Mechanism ◽

Kinetic Studies ◽

Aqueous System ◽

Chloride Complex ◽

Complex Adsorption

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Removal of Erichrome Black T from Synthetic Wastewater by Cotton Waste

E-Journal of Chemistry ◽

10.1155/2011/178607 ◽

2011 ◽

Vol 8 (2) ◽

pp. 803-808 ◽

Cited By ~ 3

Author(s):

U. V. Ladhe ◽

S. K. Wankhede ◽

V. T. Patil ◽

P. R. Patil

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Chemical Kinetics ◽

Contact Time ◽

Ph Effect ◽

Physicochemical Characterization ◽

Synthetic Wastewater ◽

Batch Adsorption ◽

Experimental Parameters ◽

Cotton Waste

Adsorptions of Erichrome Black T dye in aqueous solution on cotton stem activated carbon have been studied as a function of contact time, concentration and pH. Effect of various experimental parameters has been investigated at 39±1°C under batch adsorption technique. The result shows that cotton stem activated carbon adsorbs dye to a sufficient extent. The physicochemical characterization and chemical kinetics was also examined for the same dye. The overall result shows that it can be fruitfully used for the removal of dye from wastewaters.

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