Adsorption of cyanide from aqueous solution using calcinated eggshells: Equilibrium and optimisation studies

Eletta, Omodele A. A.; Ajayi, O.A.; Ogunleye, O. O.; Akpan, I.C.

doi:10.1016/j.jece.2016.01.020

Cited by 80 publications

(52 citation statements)

References 47 publications

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“…The high content of CaO was a result of the decomposition of CaCO3 contained in the chicken eggshell into CaO and CO2 at an elevated calcination temperature. This result agreed reasonably well with the findings reported by Eletta et al (2016). In addition, the SiO2 detected in the CAE by the XRF machine confirmed the presence of anthill.…”

Section: X-ray Fluorescence (Xrf) Analysissupporting

confidence: 92%

“…In addition, the SiO2 detected in the CAE by the XRF machine confirmed the presence of anthill. Meanwhile, the high losses on ignition (LOIs) recorded in both the raw anthill and calcined CAE catalyst samples were a result of the adsorbed gases, organic matter, and moisture content (Tsai et al, 2006;Eletta et al, 2016). This was corroborated by the FTIR analysis carried out on the calcined CAE catalyst.…”

Section: X-ray Fluorescence (Xrf) Analysismentioning

confidence: 75%

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Development and Characterization of a Composite Anthill-chicken Eggshell Catalyst for Biodiesel Production from Waste Frying Oil

Yusuff¹,

Adeniyi²,

Olutoye³

et al. 2018

IJTech

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The primary aim of this research is to synthesis composite anthill-chicken eggshell catalyst, which is characterized and employed for the synthesis of biodiesel from waste frying oil. The as-synthesized catalyst was characterized using various characterization techniques, such as Xray fluorescence (XRF), Fourier transform infrared radiation (FTIR), Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), and Basicity. The influence of different reaction parameters on the catalytic reaction, reaction time, catalyst loading and reaction temperature in the range of 50-75°C were studied at fixed methanol/oil ratio of 6:1. The experimental data obtained showed that at reaction time of 2 h, catalyst loading of 5 wt% and reaction temperature of 60°C, the biodiesel yield was 70%. The synthesized catalyst was found to convert low-grade oil into biodiesel via a single-step transesterification process, and its activity has the potential for improvement.

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Section: X-ray Fluorescence (Xrf) Analysissupporting

confidence: 92%

Section: X-ray Fluorescence (Xrf) Analysismentioning

confidence: 75%

Development and Characterization of a Composite Anthill-chicken Eggshell Catalyst for Biodiesel Production from Waste Frying Oil

Yusuff¹,

Adeniyi²,

Olutoye³

et al. 2018

IJTech

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“…Cangkang telur dapat diperoleh dari industri makanan atau kue. Cangkang telur setelah kalsinasi mengandung 89,8% CaO dan 0,01% MgO, dan bahan organik lainnya (Eletta, Ajayi, Ogunleye, & Akpan, 2016). Cangkang telur banyak digunakan dalam berbagai aplikasi, misalnya sebagai katalis biodiesel (Piker, Tabah, Perkas, & Gedanken, 2016) dan sebagai koagulan (Oladoja & Aliu, 2009).…”

Section: Pendahuluanunclassified

Kinetika Adsorpsi Cangkang Telur pada Zat Warna Metilen Blue

Badriyah

Putri

2018

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Methylene blue was one of the dyes which used in industry. It is an organic compound that dangerous and could disturb biota aquatic if it throws away in the river without preparation. Hence, it needs a treatment in liquid dye waste that could reduce degree of dye. The aim was to analyse reaction kinetic of methylene blue adsorption by egg shell. One of the treatments was adsorption. Synthesized egg shell were analysed by using FTIR to know some function groups. The reaction kinetic experiment was done to count in adsorption dye process, especially in the wastewater from textile industry. Dyes adsorption by using egg shell has equilibrium time at the 70 minutes after adsorption process. Then, the process has not a different significantly. The experiment data were fitted into the Langmuir and Freundlich isotherm. Based on adsorption data, the R 2 value of Langmuir isotherm model was the highest, 0.9986 with adsorption capacity (As) 0.3589 and adsorption coefficient (Kb) 0.7962. The adsorption kinetics of methylene blue on egg shell could be described by a pseudo second order model, with the regresion, R 2 0.9979. Keywords: kinetics, adsorption. egg shell, methylene blueMetilen biru merupakan salah satu zat warna yang digunakan dalam industri. Senyawa ini merupakan senyawa organik yang berbahaya dan mengganggu ekosistem akuatik jika dibuang ke perairan. Oleh karena itu, perlu perlakuan khusus untuk mengurangi kepekatan warnanya, diantaranya melalui proses adsorpsi. Tujuan penelitian ini adalah untuk menganalisis kinetika reaksi adsorpsi metilen biru pada cangkang telur. Sintesis cangkang telur dianalisis menggunakan FTIR untuk mengetahui gugus fungsi di dalamnya. Uji kinetika reaksi dilakukan untuk dijadikan sebagai tolok ukur dalam penyerapan zat warna. Adsorben zat warna oleh cangkang telur memiliki waktu kesetimbangan pada menit >70. Evaluasi data eksperimen adsorpsi dilakukan pada model isoterm Langmuir dan Freundlich. Data adsorpsi yang sesuai adalah model isoterm Langmuir dengan nilai regresi tertinggi sebesar 0,9986; kapasitas adsorpsi (As) sebesar 0,3589 dan koefisien adsorpsi (Kb) sebesar 0,7962. Model kinetika reaksi adsorpsi metilen biru menggunakan cangkang telur cenderung pada pseudo orde 2, dengan nilai R 2 0,9979.

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“…b T represents the adsorption potential of the adsorbent K T is the Temkin constant (Eletta et al, 2016). A plot of q e versus lnC e gives a straight line graph from which the value of K T and b T can be obtained.…”

Section: Freundlick Isothermmentioning

confidence: 99%

“…It was observed that, as pH increased from pH2 to pH6 the amount of phosphate removed increased but further increase of pH brought about a steady decrease in removal. This may be as a result of the rising competition between OH − groups and phosphate species PO4 3− for the adsorption sites (Eletta et al, 2016).…”

Section: Effects Of Ph On Phosphate Adsorptionmentioning

confidence: 99%

Equilibrium Studies and Optimization of Phosphate Adsorption from Synthetic Effluent Using Acid Modified Bio-Sorbent

Kamoru¹,

Dominic²

2017

American Journal of Engineering and Applied Sciences

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Adsorption potential of periwinkle shell (PRW), an agricultural waste, for the removal of phosphate from aqueous solution was investigated through equilibrium studies at various experimental conditions. PRW was carbonized and chemically activated with 1MH 2 SO 4 before it was subjected to characterization using Fourier Transform Infrared (FT-IR), Energy Dispersive X-ray (EDX) and Scanning Electron Microscopy (SEM). Adsorption data were analyzed using various kinetic and isotherm models. Statistical modeling through Central Composite Design (CCD) was also employed. The results showed that, FT-IR spectrum of the activated PRW shows many absorption peaks and a variety of functional groups such as -OH, -NH, C = O, C-H, C-N, CH 3 and CH 2 which explains its improved adsorption behavior on the colloidal particles. SEM shows the morphological changes with respect to the shape and sizes of the adsorption sites.EDX indicates the higher percentage composition of carbon (11.66%), Oxygen (63.18%) as important constituent elements for adsorption. Equilibrium data were well fitted to pseudo second order kinetic model and were best described by Langmuir Isotherm model at the temperature of 303K. Removal efficiency of 95.90% was obtained. A statistical model equation was developed for the adsorption process which reveals contact time as the most significant main effect for performance of the adsorbent.

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Adsorption of cyanide from aqueous solution using calcinated eggshells: Equilibrium and optimisation studies

Cited by 80 publications

References 47 publications

Development and Characterization of a Composite Anthill-chicken Eggshell Catalyst for Biodiesel Production from Waste Frying Oil

Development and Characterization of a Composite Anthill-chicken Eggshell Catalyst for Biodiesel Production from Waste Frying Oil

Kinetika Adsorpsi Cangkang Telur pada Zat Warna Metilen Blue

Equilibrium Studies and Optimization of Phosphate Adsorption from Synthetic Effluent Using Acid Modified Bio-Sorbent

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