Valorisation of Waste Mussel Shells as Biosorbent for an Azo Dye Elimination

In the present study, the waste shells were used as a new low cost and eco-friendly biosorbant for Orange G anionic dye removal from aqueous solutions. Experiments were conducted in batch mode, and the effect of pH of solution, contact time, and initial dye concentration. X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and ICP-MS analysis for chemical analysis were used to characterize the obtained biosorbent. The results showed that the mussel shells are composed 73% of calcite and 26% of aragonite with some traces of aluminum, magnesium, sodium, silicium and zinc. The biosorption results show that the optimal pH was around 2 for efficient Orange G biosorption. The equilibrium was attained in 60 min. The kinetic analysis showed that the pseudo-second-order model is in good agreement with the experimental data. The biosorption isotherm was well described by Langmuir isotherm model, the maximumbiosorption capacity was 1000mg/g. The thermodynamic study revealed that the biosorption of Orange G onto mussel shell is spontaneous and exothermic.

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Grewia spp. Biopolymer as Low-Cost Biosorbent for Hexavalent Chromium Removal

Journal of Chemistry ◽

10.1155/2019/6505731 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

G. P. Kofa ◽

G. R. Nkoue Ndongo ◽

M. B. Kameni Ngounou ◽

M. N. Nsoe ◽

E. V. Amba ◽

...

Keyword(s):

Hexavalent Chromium ◽

Low Cost ◽

Infrared Spectrometry ◽

X Ray Diffraction ◽

Order Model ◽

Solution Ph ◽

Batch Mode ◽

Pseudo Second Order ◽

Langmuir And Freundlich Models

In this study, Grewia spp. biopolymer was utilized as a biosorbent for elimination of hexavalent chromium from water. Fourier-transform infrared spectrometry (FTIR) and X-ray diffraction (XRD) were performed for characterization of the biosorbent. Experiments were conducted in a batch mode at room temperature (25 ± 2°C) and agitation speed of 100 rpm to determine the influence of biosorbent dose, contact time, Cr(VI) concentration, and initial solution pH. It was found that equilibrium was attained in 50 min. A pseudo-first-order model suited well than a pseudo-second-order model. Biosorption capacity of Grewia spp. biopolymer increased with increase in concentration and depended on the solution pH. Langmuir and Freundlich models described experimental data very well. These findings showed that Grewia spp. biopolymer can serve as a biosorbent for elimination of Cr(VI) from water.

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Adsorption of strontium on different sodium-enriched bentonites

Journal of the Serbian Chemical Society ◽

10.2298/jsc161010008m ◽

2017 ◽

Vol 82 (4) ◽

pp. 449-463 ◽

Cited By ~ 6

Author(s):

Sanja Marinovic ◽

Marija Ajdukovic ◽

Natasa Jovic-Jovicic ◽

Tihana Mudrinic ◽

Bojana Nedic-Vasiljevic ◽

...

Keyword(s):

Cation Exchange ◽

Adsorption Capacity ◽

Textural Properties ◽

X Ray Diffraction ◽

Order Model ◽

Surface Areas ◽

Alkaline Conditions ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Ph Range

Bentonites from three different deposits (Wyoming, TX, USA and Bogovina, Serbia) with similar cation exchange capacities were sodium enriched and tested as adsorbents for Sr2+ in aqueous solutions. X-Ray diffraction analysis confirmed successful Na-exchange. The textural properties of the bentonite samples were determined using low-temperature the nitrogen physisorption method. Significant differences in the textural properties between the different sodium enriched bentonites were found. Adsorption was investigated with respect to adsorbent dosage, pH, contact time and the initial concentration of Sr2+. The adsorption capacity increased with pH. In the pH range from 4.0?8.5, the amount of adsorbed Sr2+ was almost constant but 2?3 times smaller than at pH ?11. Further experiments were performed at the unadjusted pH since extreme alkaline conditions are environmentally hostile and inapplicable in real systems. The adsorption capacity of all the investigated adsorbents toward Sr2+ was similar under the investigated conditions, regardless of significant differences in the specific surface areas. It was shown and confirmed by the Dubinin?Radushkevich model that the cation exchange mechanism was the dominant mechanism of Sr2+ adsorption. Their developed microporous structures contributed to the Sr2+ adsorption process. The adsorption kinetics obeyed the pseudo-second-order model. The isotherm data were best fitted with the Langmuir isotherm model.

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Synthesis Fe3O4/Talc nanocomposite by coprecipition-ultrasonication method and advances in hexavalent chromium removal from aqueous solution

Adsorption Science & Technology ◽

10.1177/0263617420969112 ◽

2020 ◽

Vol 38 (9-10) ◽

pp. 483-501

Author(s):

Nguyen Thi Huong ◽

Nguyen Ngoc Son ◽

Vo Hoang Phuong ◽

Cong Tien Dung ◽

Pham Thi Mai Huong ◽

...

Keyword(s):

Aqueous Solution ◽

Adsorption Process ◽

Low Cost ◽

Batch Experiments ◽

X Ray Diffraction ◽

Order Model ◽

X Ray ◽

Pseudo Second Order ◽

Ft Ir ◽

Langmuir And Freundlich Equations

The Fe3O4/Talc nanocomposite was synthesized by the coprecipitation-ultrasonication method. The reaction was carried out under a inert gas environment. The nanoparticles were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), fourier-transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry techniques (VSM), the surface area of the nanoparticles was determined to be 77.92 m2/g by Brunauer-Emmett-Teller method (BET). The kinetic data showed that the adsorption process fitted with the pseudo-second order model. Batch experiments were carried out to determine the adsorption kinetics and mechanisms of Cr(VI) by Fe3O4/Talc nanocomposite. The adsorption process was found to be highly pH-dependent, which made the material selectively adsorb these metals from aqueous solution. The isotherms of adsorption were also studied using Langmuir and Freundlich equations in linear forms. It is found that the Langmuir equation showed better linear correlation with the experimental data than the Freundlich. The thermodynamics of Cr(VI) adsorption onto the Fe3O4/Talc nanocomposite indicated that the adsorption was exothermic. The reusability study has proven that Fe3O4/Talc nanocomposite can be employed as a low-cost and easy to separate.

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Adsorption of bisphenol A on oil palm biomass activated carbon: characterization, isotherm, kinetic and thermodynamic studies

Biointerface Research in Applied Chemistry ◽

10.33263/briac95.217224 ◽

2019 ◽

Vol 9 (5) ◽

pp. 4217-4224 ◽

Cited By ~ 3

Keyword(s):

Oil Palm ◽

Low Cost ◽

Endocrine System ◽

Order Model ◽

Oil Palm Trunk ◽

Palm Shell ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

The Fourier Transform ◽

Kinetic And Thermodynamic Studies

Bispheol A (BPA) is one of the new emerging pollutants that frequently utilized in many industries. BPA is a chemical that indisputable can mimic human estrogen and disrupt the endocrine system. Thus, two low-cost adsorbents (oil palm trunk and palm shell) with various physicochemical parameters were analyzed for the removal of BPA. The most favorable pH for adsorption was found to be pH 3 (75% and 77%), the adsorbent dosage was 0.1 g (76% and 78%), while temperature was 25oC (76% and 78%) and agitation speed was 150 rpm (77% and 77%) for both oil palm trunk and palm shell. It was found that the best correlation with the experimental data of BPA adsorption was the Langmuir isotherm model, while the kinetic study could be well described with the pseudo-second-order model. The Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Brunauer–Emmett–Teller (BET) were carried out to understand the functional groups, morphology, and surface area of oil palm trunk and palm shell on adsorption of BPA.

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Adsorption of Crystal Violet onto an Agricultural Waste Residue: Kinetics, Isotherm, Thermodynamics, and Mechanism of Adsorption

The Scientific World JOURNAL ◽

10.1155/2020/5873521 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9 ◽

Cited By ~ 2

Author(s):

Ilyasse Loulidi ◽

Fatima Boukhlifi ◽

Mbarka Ouchabi ◽

Abdelouahed Amar ◽

Maria Jabri ◽

...

Keyword(s):

Crystal Violet ◽

Low Cost ◽

Agricultural Waste ◽

X Ray Diffraction ◽

Almond Shell ◽

Experimental Conditions ◽

Batch Mode ◽

Crystal Violet Dye ◽

Pseudo Second Order ◽

Effectiveness And Efficiency

Agricultural waste can be exploited for the adsorption of dyes, due to their low cost, availability, cost-effectiveness, and efficiency. In this study, we were interested in the elimination of crystal violet dye, from aqueous solutions, by adsorption on almond shell-based material, as a low-cost and ecofriendly adsorbent. The almond shells were first analyzed by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction; then, the influence of adsorbent dose, initial dye concentration time, and pH were studied to assess adsorption capacity under optimal experimental conditions. Experimental results indicate that almond shell adsorbent removes about 83% of the dye from the solutions at room temperature and in batch mode; the kinetic study showed that the equilibrium time is about 90 min, and the model of pseudo-second order could very well describe adsorption kinetics. The modulation of adsorption isotherms showed that retention follows the Langmuir model. The thermodynamic study has shown that the adsorption is endothermic (ΔH° > 0) and spontaneous (ΔG° < 0).

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Engineered biochar from wood apple shell waste for high-efficient removal of toxic phenolic compounds in wastewater

Scientific Reports ◽

10.1038/s41598-021-82277-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Nadavala Siva Kumar ◽

Hamid M. Shaikh ◽

Mohammad Asif ◽

Ebrahim H. Al-Ghurabi

Keyword(s):

Low Cost ◽

Aqueous Media ◽

Kinetic Studies ◽

Apple Fruit ◽

Order Model ◽

High Efficient ◽

Shell Waste ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

Polluted Wastewater

AbstractThis study investigated a novel agricultural low-cost bio-waste biochar derived from wood apple fruit shell waste via the pyrolysis method, which is modified by ball milling and utilized to remove toxic phenol and chlorophenols (4-CPh and 2,4-DCPh) from contaminated aqueous media. The ball-milled wood apple fruit shell waste biochar (WAS-BC) sorbent was systematically analyzed by BET, CHN, and FTIR as well as particle size, SEM–EDS, XPS and TGA studies. The sorption equilibrium and kinetic studies exhibit that the sorption capacity was greater than 75% within the first 45 min of agitation at pH 6.0. The uptake capacity of 2,4-DCPh onto WAS-BC was greater than those of 4-CPh and phenol. Equilibrium results were consistent with the Langmuir isotherm model, while the kinetic data were best represented by the Elovich and pseudo-second-order model. The maximum uptake of phenol, 4-CPh, and 2,4-DCPh was 102.71, 172.24, and 226.55 mg/g, respectively, at 30 ± 1 °C. Thus, this study demonstrates that WAS-BC is an efficient, low-cost sorbent that can be used for the elimination of phenol and chlorophenol compounds from polluted wastewater.

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Comparison of Heavy Metals Removal from Aqueous Solution by Moringa oleifera Leaves and Seeds

Coatings ◽

10.3390/coatings11050508 ◽

2021 ◽

Vol 11 (5) ◽

pp. 508

Author(s):

Mohamed Abatal ◽

M. T. Olguin ◽

Ioannis Anastopoulos ◽

Dimitrios A. Giannakoudakis ◽

Eder Claudio Lima ◽

...

Keyword(s):

Metal Ions ◽

Moringa Oleifera ◽

Low Cost ◽

X Ray Diffraction ◽

Order Model ◽

Metals Removal ◽

Batch Technique ◽

Maximum Sorption ◽

Moringa Oleifera Leaves ◽

Pseudo Second Order

In this work, biomass obtained from seeds (S-MO) and leaves (L-MO) of the Moringa oleifera plant were used as low-cost biosorbents to remove the Pb(II), Cd(II), Co(II), and Ni(II) from aqueous solutions. The biosorption of the heavy metal ions was done using the batch technique. The effects of contact time (30–1440 min), biosorbent dosage (10–50 g/L) (0.1–0.5 g), and initial concentration of metals (10–500 mg/L) on the sorption capacity of metal ions were investigated. The S-MO and L-MO samples’ characterization was performed using pHpzc, X-ray Diffraction (XRD), and Fourier Transform Infrared Spectroscopy (FTIR). It was found that the pHpzc was notably different between the seeds and leave-derived biosorbents. The removal process’s experimental kinetic data for both S-MO and L-MO were best described by the pseudo-second-order model for all metal ions, with R2 above 0.997 in all cases. Langmuir and Freundlich’s models were also used to analyze the isotherms parameters. Based on the Langmuir model, the maximum sorption capacities (Qm) for L-MO were found as follows: L-MO-Pb > L-MO-Cd > L-MO-Co ≥ L-MO-Ni, and for S-MO, the values of Qm values presented the following order: S-MO-Pb > S-MO-Co > S-MO-Cd > S-MO-Ni.

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Equilibrium and Kinetic Study of Removal Copper(II) from Aqueous Solution Using Chicken Eggshells: Low Cost Sorbent

Molekul ◽

10.20884/1.jm.2021.16.1.658 ◽

2021 ◽

Vol 16 (1) ◽

pp. 28

Author(s):

Mohammad Jihad Madiabu ◽

Joko Untung ◽

Imas Solihat ◽

Andi Muhammad Ichzan

Keyword(s):

Aqueous Solution ◽

Low Cost ◽

Freundlich Isotherm ◽

Sorption Process ◽

X Ray Diffraction ◽

Order Model ◽

X Ray ◽

Adsorption Condition ◽

Pseudo Second Order ◽

Effect Of Copper

The research aims to investigate feasibility eggshells as potential adsorbent to remove copper(II) ions from aqueous solution. Eggshells powder was characterized using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. Effect of copper(II) initial concentration, adsorbent dosage, and contact time have conducted. The optimum adsorption condition obtained when 0.7 g eggshells applied to 50 mg/L copper(II) solution for 50 minutes. The maximum percentage of copper(II) removal was exceeded more than 85%. Langmuir and Freundlich isotherm model were applied to describe the equilibrium adsorption. Copper(II) kinetics sorption process was fitted to pseudo-second order model with a rate constant equal to 0.516 g/mg.min. The results clearly exhibit that eggshells powder can be effectively used to remove copper(II) ions from aqueous solutions.

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La-Doped ZnTiO3/TiO2 Nanocomposite Supported on Ecuadorian Diatomaceous Earth as a Highly Efficient Photocatalyst Driven by Solar Light

Molecules ◽

10.3390/molecules26206232 ◽

2021 ◽

Vol 26 (20) ◽

pp. 6232

Author(s):

Ximena Jaramillo-Fierro ◽

Silvia González ◽

Francesc Medina

Keyword(s):

Diatomaceous Earth ◽

Diffuse Reflectance Spectroscopy ◽

Solar Irradiation ◽

Batch Reactors ◽

X Ray Diffraction ◽

Order Model ◽

X Ray ◽

Langmuir Isotherm Model ◽

Pseudo Second Order ◽

La Doped

Currently, there is great interest in the use of TiO2 for photocatalytic remediation of wastewater. Doping, heterojunction, and immobilization on porous materials are effective methods to improve the photocatalytic efficiency of this semiconductor oxide. In this study, ZnTiO3/TiO2 (ZTO) and ZnTiO3/TiO2/La (ZTO/La) nanocomposites were successfully prepared and immobilized on diatomaceous earth (DE). The composition and texture of the composites prepared were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM-EDX), and specific surface area (SSA). The adsorption capacity and photocatalytic activity of the composites were determined via degradation of methylene blue (MB) in batch reactors. The materials evaluated were prepared in the shape of 0.2 cm (diameter) and 1.0 cm (length) cylindrical extrudates. The results indicate that the ZTO/La-DE composite exhibited higher efficiency for the removal of MB under solar irradiation than both ZTO-DE and DE. The pseudo-second-order model and the Langmuir isotherm model were better suited to explain the adsorption process. The highest degradation percentage of MB obtained was 96% after 150 min of irradiation. The results indicate that synthesized composite could be used for the removal of cationic dyes in wastewater.

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Structuring of ZnTiO3/TiO2 Adsorbents for the Removal of Methylene Blue, Using Zeolite Precursor Clays as Natural Additives

Nanomaterials ◽

10.3390/nano11040898 ◽

2021 ◽

Vol 11 (4) ◽

pp. 898

Author(s):

Ximena Jaramillo-Fierro ◽

Silvia González ◽

Fernando Montesdeoca-Mendoza ◽

Francesc Medina

Keyword(s):

Methylene Blue ◽

Adsorption Process ◽

Sol Gel ◽

Area Measurement ◽

X Ray Diffraction ◽

Order Model ◽

X Ray ◽

Surface Area Measurement ◽

Langmuir Isotherm Model ◽

Pseudo Second Order

Adsorption is an effective method of removing harmful pollutants from air and water. In the present study, zeolites prepared by sol-gel method from two Ecuadorian clays were combined with precursor clays and the ZnTiO3/TiO2 semiconductor for adsorbing methylene blue (MB) as a water contaminant. The synthesized compounds were characterized using powder X-ray diffraction, X-ray fluorescence, scanning electron microscopy, energy dispersive X-ray, and surface area measurement. These compounds were combined to form cylindrical extrudates of 0.2 cm (diameter) and 1.0 cm (length). The adsorption characteristics of the composites were measured using batch sorption studies as a function of pH, initial concentration, and contact time. The pseudo-second-order model and the Langmuir isotherm model were better suited to the adsorption process. The equilibrium state was achieved around 180 min of adsorption, and a pH of 7 was established as the optimal operating condition. The maximum adsorption values of the dye were obtained with the composites derived from G-Clay, whose average adsorption capacity was 46.36 mg g−1, in contrast with composites derived from R-Clay, whose average adsorption value was 36.24 mg g−1. The results reflect that synthesized composites could be used potentially for the removal of cationic dye from wastewater.

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