Synthesis of urea-modified MnFe2O4 for aromatic micro-pollutants adsorption from wastewater: Mechanism and modeling

Younis, Sherif A.; Moustafa, Y. M.

doi:10.1007/s10098-016-1244-6

Cited by 29 publications

(6 citation statements)

References 35 publications

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“…According to the present considerations, relatively to the investigated composite foams, the accuracy of the kinetic models was classified in the order of pseudo‐second order> Elovich> pseudo‐first kinetic model. These results imply that chemisorption phenomena may be the rate‐controlling factors on the oil sorption . Furthermore, according to the pseudo‐second order kinetics affinity, it is possible to asses that the occupation rate of binding sites suitable to interact with sorbed oils is proportional to the square number of not occupied active sites on sorbing surfaces …”

Section: Resultsmentioning

confidence: 93%

“…These results imply that chemisorption phenomena may be the rate-controlling factors on the oil sorption. 40,41 Furthermore, according to the pseudo-second order kinetics affinity, it is possible to asses that the occupation rate of binding sites suitable to interact with sorbed oils is proportional to the square number of not occupied active sites on sorbing surfaces. 35…”

Section: Kinetic Modeling and Sorption Mechanismmentioning

confidence: 99%

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Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Piperopoulos

Calabrese

Mastronardo

et al. 2018

J of Applied Polymer Sci

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Sorption kinetics of pollutant oils, such as kerosene, virgin naphtha, crude oil, and pump oil, into porous siloxanic foams filled with carbon nanotubes (CNTs) are investigated. Both, pristine and functionalized, CNTs are used as foam fillers. Among all, the foam filled with pristine CNT shows a poor affinity with water and high sorption rate in light oils, in which it achieves the highest absorption values (7991 mg g−1 after 660 s and 6685 mg g−1 after 420 s, respectively, in virgin naphtha and kerosene). The kinetic data are described by the pseudo‐first order, pseudo‐second order, Elovich and intraparticle diffusion models. Results show that chemisorption processes are rate limiting the sorption step. In fact, pseudo‐second order model better represents the equilibrium isotherm data. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47374.

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Section: Resultsmentioning

confidence: 93%

Section: Kinetic Modeling and Sorption Mechanismmentioning

confidence: 99%

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Piperopoulos

Calabrese

Mastronardo

et al. 2018

J of Applied Polymer Sci

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“…These results emphasized that the chemisorption phenomenon is the driving factor controlling the oil absorption rate, 40,41 addressing that the occupation capacity of suitable binding sites is squared proportional to the amount of still active sites (not yet occupied) on the surface of the absorbent foam 33 . However, an additional factor that synergistically influences the absorption capacity and the mass transport phenomena inside the absorbent is represented by the porosity and bubble diameter of the foam.…”

Section: Resultsmentioning

confidence: 96%

Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

Piperopoulos

Calabrese

Stаnkov-Jovаnović

et al. 2022

J of Applied Polymer Sci

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The aim of this article is the synthesis and characterization of bentonite‐filled siloxane foams for oil spills recovery. Composite foams at varying filler content in the range 35–45 wt% were investigated. The sorption kinetics and capacity of composite foams in different oils (e.g., kerosene, virgin naphtha, pump oil) were assessed. As a reference, water absorption capacity was also evaluated. Among all, the composite foam filled with 40 wt% bentonite (B‐40 batch) shows the lowest affinity with water and good absorption capacity with oils (mainly light oils) reaching an absorption capacity at saturation equal to 10.3 and 518.2 wt% in water and virgin naphtha, respectively. Furthermore, isothermal absorption curves were analyzed using three kinetic models: pseudo‐first order, pseudo‐second order, and Elovich models. The equilibrium isotherm fitting results were optimal using the pseudo‐second order model, indicating that chemisorption phenomena play a key role in the speed of the absorption phase for these PDMS‐based composite foams. Finally, a correlation was addressed between morphology, foam microstructure, absorption capacity, and kinetics.

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“…22 Adsorpsi dalam kinetika pseudo-second-order mengasumsikan bahwa adsorpsi melibatkan proses kemisorpsi, adsorpsi permukaan dan difusi partikel. 23 Nilai R 2 untuk pseudo-first-order dan pseudo-secondorder untuk adsorpsi minyak dan lemak menggunakan karbon aktif yang terbuat dari ampas tebu masingmasing sebesar 0,11 dan 0,99, hal ini menunjukkan bahwa pseudo-second-order akurat untuk menggambarkan adsorpsi minyak dan lemak. 23 Berdasarkan hasil perhitungan, laju adsorpsi minyak dan lemak (k2) dengan menggunakan karbon aktif kulit pisang didapatkan nilai sebesar 3,6 x 10 -4 g mg -1 min -1 .…”

Section: Kinetika Adsorpsi Parameter Nilaiunclassified

“…23 Nilai R 2 untuk pseudo-first-order dan pseudo-secondorder untuk adsorpsi minyak dan lemak menggunakan karbon aktif yang terbuat dari ampas tebu masingmasing sebesar 0,11 dan 0,99, hal ini menunjukkan bahwa pseudo-second-order akurat untuk menggambarkan adsorpsi minyak dan lemak. 23 Berdasarkan hasil perhitungan, laju adsorpsi minyak dan lemak (k2) dengan menggunakan karbon aktif kulit pisang didapatkan nilai sebesar 3,6 x 10 -4 g mg -1 min -1 . Nilai laju tersebut lebih kecil dibandingkan dengan laju adsorpsi minyak dan lemak menggunakan karbon aktif dari Moringa oleifera dengan nilai k2 sebesar 5,63x10 -4 g mg -1 menit -1 .…”

Section: Kinetika Adsorpsi Parameter Nilaiunclassified

Penyisihan BOD, Minyak Dan Lemak Dalam Air Limbah Domestik Dengan Menggunakan Karbon Aktif Dari Kulit Pisang

Rofikoh,

Zaman,

Samadikun

2023

Jurnal Kesehatan Lingkungan Indonesia

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Latar belakang: BOD, minyak dan lemak dalam air limbah domestik berbahaya bagi lingkungan. Polutan tersebut dapat dihilangkan dengan teknik adsorpsi menggunakan karbon aktif kulit pisang dengan efisiensi mencapai 70%. Tujuan penelitian yaitu mengkaji pengaruh dosis karbon aktif dan waktu kontak terhadap penyisihan BOD, minyak dan lemak, serta kinetika adsorpsinya, morfologi permukaan dan unsur kimia karbon aktif kulit pisang.Metode: Penelitian ini menggunakan Rancangan Acak Lengkap Faktorial. Faktor pertama dosis karbon (1,5 g, 3 g, 4,5 g) dan faktor kedua waktu kontak (30, 60, dan 90 menit), dengan 2 ulangan. Percobaan adsorpsi menggunakan sistem batch dengan gelas beker. Parameter penelitian meliputi BOD yang dianalisis dengan titrasi iodometri (SNI-6989.72:2009), serta minyak dan lemak dengan metode gravimetri (SNI-6989.10:2011). Analisis data menggunakan analisis deskriptif yang meliputi efisiensi penyisihan, kinetika adsorpsi, morfologi permukaan dan elemen karbon aktif. Hasil: : Dosis karbon aktif dan waktu kontak mampu menyisihkan BOD, minyak dan lemak hingga 24% dan 97%. Kinetika adsorpsi pseudo-second-order dengan R2 0,98 dan 0,99 menggambarkan adsorpsi BOD, minyak dan lemak. Karbon aktif sebelum adsorpsi pori-porinya terbuka dan permukaannya bersih, sedangkan setelah adsorpsi pori-porinya tertutup, permukaan padat, dan bergelombang. Elemen karbon sebelum adsorpsi terdiri dari C, O, K sebesar 76,53%, 19,46%, 2,24%, dan setelah adsorpsi terdiri dari C 78,94% dan O 19,87%.Simpulan: Dosis karbon dan waktu kontak berpengaruh terhadap penyisihan BOD, minyak dan lemak. Kinetika adsorpsi pseudo-second-order menggambarkan adsorpsi BOD, minyak dan lemak. Morfologi permukaan dan unsur karbon aktif sebelum dan sesudah adsorpsi berbeda. Title: Removal of BOD, Oil and Grease in Domestic Wastewater Using Activated Carbon from Banana PeelsBackground: BOD, oil and grease in domestic wastewater are harmful to the environment. These pollutants can be removed with adsorption techniques by activated carbons using banana peels with an efficiency up to 70%. The aim of the study was to analyze the impact of activated carbon doses and the contact time on BOD, oil and grease removal, as well as the kinetics of adsorption, surface morphology and chemical elements from banana peel activated carbon.Method: This experiment used a factorial completely randomized design. The first factor was carbon dosage (1.5 g, 3 g, 4.5 g) and the second was contact time (30, 60, and 90 minutes), with 2 replications. The adsorption experiment used a batch system with a glass beaker. The research parameters included BOD analyzed by iodometric titration (SNI-6989.72:2009), and oil and grease by gravimetric method (SNI-6989.10:2011). Data analysis using descriptive analysis which includes removal efficiency, adsorption kinetics, surface morphology and activated carbon elements.Result: The activated carbon dosage and contact time removed BOD, oil and grease up to 24% and 97%, respectively. Pseudo-second-order adsorption kinetics with R2 0.98 and 0.99 described the adsorption of BOD, oil and grease. Activated carbon before adsorption had open pores and a clean surface, while after adsorption the pores were closed, and the surface was solid and ridged. The carbon element before adsorption consists of C, O, and K at 76.53%, 19.46%, and 2.24%, and after adsorption consists of C at 78.94% and O at 19.87%.Conclusion: Carbon dosage and contact time affected the removal of BOD, oil and grease. The pseudo-second-order adsorption kinetics described the adsorption of BOD, oil and grease. The surface morphologies and elements from activated carbon before and after adsorption as different.

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Synthesis of urea-modified MnFe2O4 for aromatic micro-pollutants adsorption from wastewater: Mechanism and modeling

Cited by 29 publications

References 35 publications

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Assessment of sorption kinetics of carbon nanotube‐based composite foams for oil recovery application

Bentonite‐PDMS composite foams for oil spill recovery: Sorption performance and kinetics

Penyisihan BOD, Minyak Dan Lemak Dalam Air Limbah Domestik Dengan Menggunakan Karbon Aktif Dari Kulit Pisang

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