Utilization of egg-shell, a locally available biowaste material, for adsorptive removal of congo red from aqueous solution

Egg-shell, a locally obtainable biowaste material, was successfully used for common textile dye (congo red) removal from synthetic wastewater solution. All adsorptive experiments were carried out in a batch method. Experiments were conducted to understand the consequence of different functioning parameters, for example, the pH of the solution, adsorbent dosage, reaction time, and initial adsorbate concentration. The surface morphology of the egg-shell was analyzed by scanning electron microscopy (SEM) images of the adsorbent (before as well as after adsorption) showed that there was a change in surface morphology, which ensured the congo red adsorption on the adsorbent surface. The adsorbent dose was determined to be 1g as optimum value, while the solution pH 5 was seemingly the best operating pH at the tested conditions. Complete adsorption was achieved in 120 min while the pseudo-second-order kinetic model portrayed the sorption kinetics quite nicely. Langmuir adsorption model (monolayer adsorption) was the best-suited model for describing the sorption process in the concern of the correlation coefficient. The values of dimensionless separation parameters (RL) signified that the adsorption process was promising for all studied concentrations. A considerably great extent of sorption capacity (153.85 mg/g) of egg-shell adsorbent indicated that it could be employed for wastewater treatment in textile and related industries

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Eucheuma cottonii Seaweed-Based Biochar for Adsorption of Methylene Blue Dye

Sustainability ◽

10.3390/su122410318 ◽

2020 ◽

Vol 12 (24) ◽

pp. 10318 ◽

Cited By ~ 1

Author(s):

Anwar Ameen Hezam Saeed ◽

Noorfidza Yub Harun ◽

Suriati Sufian ◽

Ahmer Ali Siyal ◽

Muhammad Zulfiqar ◽

...

Keyword(s):

Methylene Blue ◽

Large Scale ◽

Synthetic Wastewater ◽

Blue Dye ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Methylene Blue Dye ◽

Adsorption Model ◽

Solution Ph ◽

Eucheuma Cottonii

Pollution from dye containing wastewater leads to a variety of environmental problems, which can destroy plant life and eco-systems. This study reports development of a seaweed-based biochar as an adsorbent material for efficient adsorption of methylene blue (MB) dye from synthetic wastewater. The Eucheuma cottonii seaweed biochar was developed through pyrolysis using a tube furnace with N2 gas, and the properties were later improved by sulfuric acid treatment. The adsorption studies were conducted in a batch experimental setup under initial methylene blue concentrations of 50 to 200 mg/L, solution pH of 2 to 10, and temperature of 25 to 75 °C. The characterization results show that the developed biochar had a mesoporous pore morphology. The adsorbent possessed the surface area, pore size, and pore volume of 640 m2/g, 2.32 nm, and 0.54 cm3/g, respectively. An adsorption test for 200 mg/L of initial methylene blue at pH 4 showed the best performance. The adsorption data of the seaweed-based biochar followed the Langmuir isotherm adsorption model and the pseudo-second-order kinetic model, with the corresponding R2 of 0.994 and 0.995. The maximum adsorption capacity of methylene blue using the developed seaweed‑based biochar was 133.33 mg/g. The adsorption followed the chemisorption mechanism, which occurred via the formation of a monolayer of methylene blue dye on the seaweed-based biochar surface. The adsorption performance of the produced seaweed biochar is comparable to that of other commercial adsorbents, suggesting its potential for large-scale applications.

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Adsorption of Congo Red Dye on HDTMA Surfactant-Modified Zeolite A Synthesized from Fly Ash

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.382.307 ◽

2018 ◽

Vol 382 ◽

pp. 307-311 ◽

Cited By ~ 1

Author(s):

Jumaeri ◽

Sri Juari Santosa ◽

Sutarno

Keyword(s):

Fly Ash ◽

Congo Red ◽

Contact Time ◽

Batch Reactor ◽

Order Kinetic ◽

Zeolite A ◽

Adsorption Model ◽

Anionic Dyes ◽

Initial Concentration ◽

Modified Zeolite

Adsorption of anionic dyes Congo Red (CR) on HDTMA surfactant-modified zeolite A has been studied. The zeolite A, which is synthesized from coal fly ash, was modified with surfactant hexdeciltrimethylammonium bromide (HDTMA-Br) as much as 200% cation exchange capacity (CEC) of the zeolite. The effect of pH, contact time and initial concentration on the CR adsorption has been evaluated.The adsorption was carried out in a batch reactor at various pH, contact time and initial concentration on the given temperature. The amount CR adsorption varies as a function of pH, contact time and initial concentration of solution. Adsorption model of Langmuir and Freundlich from empirical data is used for this experiment. The Langmuir isotherm is more suitable for this adsorption. The experimental data fulfilled pseudo second-order kinetic models. The surfactant-modified zeolite A is more effective than zeolite A without modified on the adsorption of CR in aqueous solution.

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Banana Fibers as Sorbent for Removal of Acid Green Dye from Water

Journal of Chemistry ◽

10.1155/2016/9648312 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Siti Kartina Abdul Karim ◽

Soh Fong Lim ◽

S. N. David Chua ◽

Shanti Faridah Salleh ◽

Puong Ling Law

Keyword(s):

Freundlich Isotherm ◽

Sorption Process ◽

Agitation Speed ◽

Second Order ◽

Order Kinetic ◽

Solution Ph ◽

Banana Fiber ◽

Banana Fibers ◽

Pseudo Second Order ◽

Banana Leaves

In this study, banana fibers extracted from banana leaves, stem, and stalk were used to remove acid green dye from aqueous solution. Three initial concentrations (750, 1000, and 1500 ppm) were chosen to determine the kinetic characteristics of the banana fiber sorbents at 25°C, agitation speed of 200 rpm, and total contact time of 3 hours. The pseudo-first-order, pseudo-second-order, and Dunwald-Wagner kinetic models were applied to the experimental kinetic data. For isotherm study, the batch experiments were performed at 25°C, initial pH 2, agitation speed of 200 rpm, and initial concentrations between 100 and 2000 ppm. The experimental data was fitted to the Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherms. The equilibrium was achieved in less than 90 minutes. The removal of the acid green dye was found to be following closely the pseudo-second-order kinetic model. For equilibrium study, the Freundlich isotherm was found to fit well with adsorption of acid green dye on the banana leaves, stem, and stalk sorbents. The calculated mean free energy of 4–11 J/mol indicated that the sorption process was mostly physical in nature. Experimental results also showed the adsorption performance is greatly affected by the initial solution pH.

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Evaluation of the Marine AlgaeGracilariaand its Activated Carbon for the Adsorption of Ni(II) from Wastewater

E-Journal of Chemistry ◽

10.1155/2011/137484 ◽

2011 ◽

Vol 8 (4) ◽

pp. 1512-1521 ◽

Cited By ~ 5

Author(s):

A. Esmaeili ◽

P. Beirami ◽

S. Ghasemi

Keyword(s):

Activated Carbon ◽

Kinetic Studies ◽

Second Order ◽

Order Kinetic ◽

Adsorption Model ◽

Solution Ph ◽

Isotherm Equation ◽

Adsorption Data ◽

Langmuir Isotherm Equation ◽

Pseudo Second Order

The batch removal of Ni2+from aqueous solution and wastewater using marine dried (MD) red algaeGracilariaand its activated carbon (AC) was studied. For these experiments, adsorption of Ni2+was used to form two biomasses of AC and MD. Both methods used different pH values, biomass and initial concentration of Ni2+. Subsequently adsorption models and kinetic studies were carried out. The maximum efficiencies of Ni2+removal were 83.55% and 99.04% for MD and AC respectively developed from it. The experimental adsorption data were fitted to the Langmuir adsorption model. The nickel(II) uptake by the biosorbents was best described by pseudo-second order rate model. The kinetic studies showed that the heavy metal uptake was observed more rapidly by the AC with compared to MD. AC method developed from MD biomass exhibited higher biosorption capacity. Adsorption capacity is related to the pH of solution, pH 5.0 is optimal for nickel. The maximum efficiencies of Ni2+removal were for AC method. The capacity is related to the pH of solution, pH 5.0 is optimal for nickel. The equilibrium adsorption data are correlated by Langmuir isotherm equation. The adsorption kinetic data can be described by the second order kinetic models

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Itaconic acid-modified layered double hydroxide as a ‎novel adsorbent for effective removal of Congo red from aqueous solutions

10.21203/rs.3.rs-345643/v1 ◽

2021 ◽

Author(s):

Mohammad Dinari ◽

Shirin Shabani

Keyword(s):

Layered Double Hydroxide ◽

Itaconic Acid ◽

Congo Red ◽

Aqueous Media ◽

Freundlich Isotherm ◽

Second Order ◽

Order Kinetic ◽

Solution Ph ◽

Pseudo Second Order ◽

Double Hydroxide

Abstract Herein, we report the synthesis of Cu-Ca-Al/NO3-based layered double hydroxide through co-precipitation methodology. The prepared layered double hydroxide was then modified with itaconic acid. The physicochemical properties of the prepared materials were studied using Fourier transform-infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, thermogravimetric analysis, and nitrogen adsorption/desorption technique. The prepared materials were then applied as novel adsorbents for the removal of Congo red as a model of an anionic dye from aqueous media. To reach maximum adsorption, the effect of parameters including sample solution pH, adsorbent amount, contact time, and initial concentration of Congo red on the adsorption process was investigated. Kinetic studies were also conducted to study the mechanism of adsorption. In this regard, the kinetic models of pseudo-first-order, pseudo-second-order, Elovich, and intra-particle diffusion were studied. The results showed that the adsorption of Congo red onto Cu-Ca-Al-LDH and LDH-ITA adsorbents followed the pseudo-second-order kinetic model. To evaluate the equilibrium adsorption data, different isotherms including Langmuir, Freundlich, and Dubinin-Radushkevich were also applied. The data revealed that the Freundlich isotherm provided the best fit with the equilibrium data of both adsorbents. Maximum adsorption capacities of 81 and 84 mg g− 1 were obtained using Cu-Ca-Al-LDH and LDH-ITA adsorbents, respectively.

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Kinetics, Isotherm and Thermodynamic Studies for Efficient Adsorption of Congo Red Dye from Aqueous Solution onto Novel Cyanoguanidine-Modified Chitosan Adsorbent

Polymers ◽

10.3390/polym13244446 ◽

2021 ◽

Vol 13 (24) ◽

pp. 4446

Author(s):

Nouf F. Al-Harby ◽

Ebtehal F. Albahly ◽

Nadia A. Mohamed

Keyword(s):

Aqueous Solution ◽

Congo Red ◽

Adsorption Process ◽

Ph Value ◽

Dye Adsorption ◽

Order Kinetic ◽

Amino Groups ◽

Solution Ph ◽

Intraparticle Diffusion Model ◽

Modified Chitosan

Novel Cyanoguanidine-modified chitosan (CCs) adsorbent was successfully prepared via a four-step procedure; first by protection of the amino groups of chitosan, second by insertion of epoxide rings, third by opening the latter with cyanoguanidine, and fourth by restoring the amino groups through elimination of the protection. Its structure and morphology were checked using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. The adsorption capacity of CCs for Congo Red (CR) dye was studied under various conditions. It decreased significantly with the increase in the solution pH value and dye concentration, while it increased with increasing temperature. The adsorption fitted to the pseudo-second order kinetic model and Elovich model. The intraparticle diffusion model showed that the adsorption involved a multi-step process. The isotherm of CR dye adsorption by CCs conforms to the Langmuir isotherm model, indicating the monolayer nature of adsorption. The maximum monolayer coverage capacity, qmax, was 666.67 mg g−1. Studying the thermodynamic showed that the adsorption was endothermic as illustrated from the positive value of enthalpy (34.49 kJ mol−1). According to the values of ΔG°, the adsorption process was spontaneous at all selected temperatures. The value of ΔS° showed an increase in randomness for the adsorption process. The value of activation energy was 2.47 kJ mol−1. The desorption percentage reached to 58% after 5 cycles. This proved that CCs is an efficient and a promising adsorbent for the removal of CR dye from its aqueous solution.

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Facile solvothermal synthesis of Fe3O4/magnetic grapefruit peel for adsorptive removal of congo red, humic acid and phosphate from aqueous solutions

Materials Express ◽

10.1166/mex.2020.1610 ◽

2020 ◽

Vol 10 (1) ◽

pp. 37-44 ◽

Cited By ~ 1

Author(s):

Stelgen Inkoua ◽

Herman Loussala Maloko ◽

Mave Motandi Koko ◽

Liangguo Yan

Keyword(s):

Humic Acid ◽

Aqueous Solutions ◽

Congo Red ◽

Solvothermal Reaction ◽

Magnetic Composite ◽

Order Kinetic ◽

Solution Ph ◽

Grapefruit Peel ◽

The Fourier Transform ◽

High Level

An environment-friendly and economical magnetic composite, namely Fe3O4/GP, was produced from grapefruit peel (GP) and ferric chloride via the solvothermal method in one easy step, and was used to remove Congo red (CR), humic acid (HA), and phosphate (P) from aqueous solutions. The Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM) procedures and specific surface area and zeta potential determination were applied to describe the structure of Fe3O4/GP composite. The results shown the Fe3O4 particles, which fabricated during the solvothermal reaction, were distributed evenly on the surface of GP. Then Fe3O4/GP composite also presented a high level of magnetism, and thus could be separated quickly from suspension by an external magnet. The adsorption efficiencies of Fe3O4/GP for CR, HA, and P were 92.88%, 47.45%, and 99.02%, which were found uninfluenced by the initial solution pH and attained the equilibrium state within 10 min. The kinetic and isothermal tests were performed and the data were consistent with the pseudo-second-order kinetic equation and the Freundlich model.

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Sorption of Cd2+ and Pb2+ on Aragonite Synthesized from Eggshell

Sustainability ◽

10.3390/su12031174 ◽

2020 ◽

Vol 12 (3) ◽

pp. 1174 ◽

Cited By ~ 6

Author(s):

Lulit Habte ◽

Natnael Shiferaw ◽

Mohd Danish Khan ◽

Thenepalli Thriveni ◽

Ji Whan Ahn

Keyword(s):

Experimental Data ◽

Synthetic Wastewater ◽

Isotherm Models ◽

Order Kinetic ◽

Solution Ph ◽

Surface Precipitation ◽

Initial Ph ◽

Order Kinetic Model ◽

High Sorption ◽

Pseudo Second Order

In the present work, waste eggshells were used as a precursor for the synthesis of aragonite crystals through the wet carbonation method. Cadmium (Cd2+) and lead (Pb2+) were removed by the synthesized aragonite from synthetic wastewater. The influence of initial solution pH, contact time, Cd2+ and Pb2+ concentration, and sorbent dosage were evaluated. The major sorption was observed in the first 100 mins and 360 mins for Pb2+and Cd2+ respectively reaching sorption equilibrium at 720 mins (12 hr). The sorption capacity toward Pb2+ was much higher than toward Cd2+. Both heavy metals displayed high sorption capacities at initial pH 6. The pseudo-second-order kinetic model fits well with the experimental data with a higher correlation coefficient R2. Two isotherm models were also evaluated for the best fit with the experimental data obtained. Langmuir isotherm best fits the sorption of the metals on aragonite synthesized from eggshells. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) results of sorbent after sorption showed that the mechanism of sorption was dominated by surface precipitation. Therefore, aragonite crystals synthesized from waste eggshells can be a potential substitute source for the removal of Cd2+ and Pb2+ from contaminated water.

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Sorption studies of Cr(VI) from aqueous solution using bio-char as an adsorbent

Water Science & Technology ◽

10.2166/wst.2014.143 ◽

2014 ◽

Vol 69 (11) ◽

pp. 2265-2271 ◽

Cited By ~ 15

Author(s):

A. H. M. G. Hyder ◽

Shamim A. Begum ◽

Nosa O. Egiebor

Keyword(s):

Aqueous Solution ◽

Low Cost ◽

Treatment Plant ◽

Sorption Process ◽

Sorption Kinetics ◽

Synthetic Wastewater ◽

Order Kinetic ◽

Water And Wastewater Treatment ◽

Maximum Sorption Capacity ◽

Kinetics And Isotherms

The characteristics of sorption of hexavalent chromium (Cr(VI)) onto bio-char derived from wood chips (spruce, pine, and fir) were evaluated as a function of pH, initial Cr(VI) concentration and bio-char dosage using synthetic wastewater in batch tests. The initial Cr(VI) concentrations were varied between 10 and 500 mg/L to investigate equilibrium, kinetics, and isotherms of the sorption process. About 100% of Cr(VI) was removed at pH 2 with initial Cr(VI) concentration of 10 mg/L using 4 g of bio-char after 5 hours of sorption reaction. The maximum sorption capacity of the bio-char was 1.717 mg/g for an initial Cr(VI) concentration of 500 mg/L after 5 hours. The sorption kinetics of total Cr onto bio-char followed the second-order kinetic model. The Langmuir isotherm model provided the best fit for total Cr sorption onto bio-char. The bio-char used is a co-product of a down draft gasifier that uses the derived syngas to produce electricity. Bio-char as a low cost adsorbent demonstrated promising results for removal of Cr(VI) from aqueous solution. The findings of this study would be useful in designing a filtration unit with bio-char in a full-scale water and wastewater treatment plant for the Cr(VI) removal from contaminated waters.

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Evaluation of the marine alga Sargassum glaucescens for the adsorption of Zn(II) from aqueous solutions

Water Quality Research Journal ◽

10.2166/wqrjc.2014.006 ◽

2014 ◽

Vol 49 (4) ◽

pp. 339-345 ◽

Cited By ~ 4

Author(s):

Akbar Esmaeili ◽

Mayam Darvish

Keyword(s):

Aqueous Solutions ◽

Second Order ◽

Maximum Efficiency ◽

Order Kinetic ◽

Weight Retention ◽

Adsorption Model ◽

Solution Ph ◽

Uptake Kinetic ◽

Adsorption Data ◽

Pseudo Second Order

The objective of this research was to study the efficacy of the marine brown alga Sargassum glaucescens in batch removal of Zn(II) from wastewater and seawater. For these experiments, a dried biomass was used to adsorb Zn(II) from aqueous solutions. The effects of varying pH, biomass weight, retention time and initial concentration of Zn(II) were studied. The maximum efficiency of Zn(II) removal obtained was 90.00%. The experimental adsorption data were fitted to the Freundlich adsorption model. A pseudo-second-order model was found to offer the best analysis of Zn(II) uptake. Kinetic studies showed that a biomass formed of marine-dried S. glaucescens exhibited high biosorption capacity. A solution pH of 5.0 was found to be optimal for adsorption. Results showed that removal of Zn(II), increased to 90.00% with increasing contact time, increasing pH (to 5.0) and decreasing adsorbent amount. The equilibrium adsorption data are fitted to the Freundlich isotherm model and pseudo-second-order kinetic models. Therefore, brown algae Sargassum glaucescens was an economical adsorbent.

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