Article
Chemistry, Multidisciplinary
Feng Gao, Lei Zhang, Libin Yang, Xuefei Zhou, Yalei Zhang
Summary: Three types of graphene oxides (GOs) were prepared and used for the removal of Cr(VI). The adsorption performance of GOs was affected by initial concentration, pH, adsorbent dosage, contact time, and temperature. The adsorption mechanisms involved redox reaction, electrostatic attraction, pore filling, ion exchange, and complexation. The adsorption processes were mainly monolayer chemisorption and equilibrium could be reached in 30 min. The saturation adsorption capacities of GO-M1, GO-M2, and GO-M3 for Cr(VI) were estimated to be 3.5412 mg.g(-1), 2.3631 mg.g(-1), and 7.0358 mg.g(-1), respectively. The adsorption processes of Cr(VI) by GOs were endothermic, entropy-driven, and thermodynamically spontaneous and feasible. These findings provide important insights into the mechanism and application of Cr(VI) removal by GOs.
Article
Chemistry, Multidisciplinary
Hadeel Saad, F. A. Nour El-Dien, Nadia E. A. El-Gamel, Ahmed S. Abo Dena
Summary: Water contamination is a serious global issue due to the depletion of water resources suitable for drinking and agriculture. Researchers have developed a magnetic adsorbent nanomaterial for removing the anionic dye bromocresol green from wastewater. The adsorbent has high adsorption capacity and can be easily removed using a strong magnetic field.
Article
Chemistry, Physical
Sesegma Ts. Khankhasaeva, Sayana V. Badmaeva, Marina V. Ukhinova
Summary: The adsorption of diclofenac (DCF), a common pharmaceutical pollutant, on Fe2O3-pillared montmorillonites (Fe-PMts) was studied. Fe-PMts were synthesized by intercalation of natural montmorillonite with iron polyoxocations. The pillaring process significantly increased the specific surface area and sorption capacity of the clay. The pH, sorbent content, DCF concentration, and temperature were found to be the main factors affecting DCF adsorption. The kinetic data and adsorption isotherm were analyzed using various models, and the results showed that the adsorption followed pseudo-second order kinetics and Langmuir isotherm. The thermodynamic parameters indicated that the adsorption of DCF on Fe-PMt was spontaneous and exothermic. Fe-PMt was proven to be an effective and environmentally friendly sorbent for DCF removal in pharmaceutical wastewater treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Ruba Munir, Khuram Ali, Syed Abbas Zilqurnain Naqvi, Muhammad Aamer Maqsood, Muhammad Zeeshan Bashir, Saima Noreen
Summary: The study successfully synthesized zinc oxide, copper oxide, manganese dioxide, and magnesium oxide nanoparticles from Leucaena leucocephala leaves for the removal of Reactive Golden Yellow-145 and Direct Red-31 dyes. The nanoparticles showed high adsorption capacities for both dyes. The study also investigated the effects of surfactants and electrolytes on dye adsorption.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Gino Alexander Chavez-Prado, Adams Brayan Benavides-Garcia, Luis Angel Zambrano-Intriago, Naga Raju Maddela, Luis Santiago Quiroz-Fernandez, Ricardo Jose Baquerizo-Crespo, Joan Manuel Rodriguez-Diaz
Summary: This study evaluated the use of Tagua shell as an adsorbent for removing lead (II) from aqueous media. The Langmuir and Sips models showed high coefficients of determination at different temperatures, making them the best representations of the adsorption process. The thermodynamics study indicated that the process is endothermic, spontaneous, and thermodynamically stable.
Article
Engineering, Chemical
Edwin A. Ofudje, Ezekiel F. Sodiya, Fatai Akinwunmi, Abimbola A. Ogundiran, Olugbenga B. Oladeji, Oluremi A. Osideko
Summary: Calcium oxide nanoparticles prepared from eggshell agro-waste were found to be effective adsorbents for Toluidine blue dye. Various analytical techniques were used to characterize the adsorbent, and the adsorption process was studied under different conditions. The kinetic and equilibrium data indicated that the adsorption followed pseudo-second-order kinetics and could be described by both Langmuir and Freundlich isotherms. The thermodynamic evaluation showed that the adsorption of TB was endothermic, spontaneous, and feasible.
DESALINATION AND WATER TREATMENT
(2022)
Article
Environmental Sciences
Qammer Zaib, Urjinlkham Ryenchindorj, Agusta Samodra Putra, Daeseung Kyung, Hung-Suck Park
Summary: In this study, iron-coated pine-bark biochar (Fe-PBB) was synthesized and the optimal conditions for removing tetracycline from water were determined. Fe-PBB showed a higher adsorption capacity for tetracycline compared to PBB. The effects of initial tetracycline concentration, pH, temperature, and Fe-PBB dose on the adsorption removal of tetracycline were systematically investigated and optimized. The study also provided insights into the adsorption mechanism and thermodynamics of tetracycline on Fe-PBB.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Giannin Mosoarca, Simona Popa, Cosmin Vancea, Sorina Boran
Summary: Dry bean pods husks were employed as an adsorbent to remove methylene blue from aqueous solutions without the use of chemical substances or thermal treatment. The adsorbent characteristics were analyzed using SEM and FTIR, and the Taguchi method was utilized to optimize parameters affecting dye adsorption. Equilibrium and kinetic modeling indicated a physical adsorption process with Langmuir isotherm and pseudo-second order kinetics. The thermodynamic studies showed a spontaneous, favorable, and endothermic adsorption process, with the adsorbent displaying a higher adsorption capacity than other similar materials.
Article
Multidisciplinary Sciences
Edita Sodaitiene, Audrone Gefeniene, Danute Kauspediene, Romas Ragauskas, Jurate Vaiciuniene, Ausra Selskiene, Vitalija Jasulaitiene, Rimantas Ramanauskas
Summary: Groundwater treatment waste (GWTW) serves as an environmentally friendly renewable nanomaterial for efficient removal of Sanodure Green dye, showing great potential in wastewater treatment. Kinetic studies reveal that 90% of SG dye can be removed within a contact time of 20 minutes. Thermodynamic parameters confirm that the removal of SG dye is spontaneous and exothermic.
Review
Environmental Sciences
Shraddha Pai, M. Srinivas Kini, Raja Selvaraj
Summary: Hydroxyapatite is an efficient adsorbent for dye removal, especially when modified to enhance removal efficiency. Nanocomposites of hydroxyapatite show high adsorption capacities, with comprehensive studies on adsorption mechanisms and thermodynamics.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
S. Aguirre-Contreras, R. Leyva-Ramos, R. Ocampo-Perez, C. G. Aguilar-Madera, J. V. Flores-Cano, N. A. Medellin-Castillo
Summary: The mathematical modeling of the dynamic adsorption of 8-Hydroxyquinoline on activated carbon in batch and fixed-bed adsorbers is described in this study. The model considers mass transport phenomena and includes axial dispersion, convective transport, intraparticle diffusion mechanisms, and adsorption on the active site. A methodology based on adsorption equilibrium and rate studies is proposed to solve the model, without considering fitting the mass transport parameters for breakthrough curve prediction, which is an important advancement in fixed-bed column design. The equilibrium results show that 8-HQ adsorbs onto activated carbon through dispersive and hydrophobic interactions, with a mass adsorbed of 454 mg g-1. The kinetic study reveals that achieving equilibrium is faster under turbulent stirring regime, and intraparticle transport is governed by surface diffusion. By using information obtained from the batch regime, the packed bed behavior can be interpreted and predicted in a wide range of operational conditions with an error of 10.6% in breakthrough point prediction.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Dinh-Trinh Tran, Thuy-Duong Pham, Viet-Cuong Dang, Thanh-Dong Pham, Minh-Viet Nguyen, Nhat-Minh Dang, Minh-Ngoc Ha, Van-Noi Nguyen, Long D. Nghiem
Summary: The removal of NH4+ and PO43- from water using adsorbents produced from rice husk and corn cob byproducts was investigated. The activation of biochar by magnesium led to changes in its surface properties and increased the adsorption capacity of NH4+ and PO43-. This study contributes to the development of low-cost and highly efficient adsorbents for water treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Magdalena Blachnio, Anna Derylo-Marczewska, Szymon Winter, Malgorzata Zienkiewicz-Strzalka
Summary: Mesoporous carbons with differentiated properties were synthesized by impregnation of organized silicas, and their structural, surface, and adsorption properties were investigated using various methods. Experimental data analysis confirmed the applicability of mesoporous carbons for dye removal, with techniques such as SAXS, nitrogen sorption, potentiometric titration, and TEM providing complementary results on porosity and structural ordering. Adsorption experiments, particularly kinetic measurements, demonstrated the utility of mesoporous carbons in dye removal considering adsorption uptake and rate.
Review
Environmental Sciences
K. Naseem, Q. Imran, M. Z. Ur Rehman, M. H. Tahir, J. Najeeb
Summary: This review article discusses the adsorptive characteristics of neem biomass for the removal of heavy metal ions and dyes from water. Neem biomass, with its availability and various functional groups, is able to extract heavy metal ions and dyes from water through electrostatic interactions. Factors such as pH, adsorbate concentration, adsorbent dosage, contact time, particle size, and temperature also affect the adsorptive capacity of the biomass. Neem biomass shows affinity to Langmuir and Freundlich isotherm models and follows pseudo-second-order kinetics. The article also suggests that the adsorptive potential of neem biomass can be enhanced through chemical modification.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Laigi Joseph, V. P. Sylas, Neethu Cyril, K. S. Sanu, Seno Jose, B. N. Anila, Jacob M. Jose
Summary: Biochar derived from acacia wood at 500 degrees C showed feasibility in adsorbing endrin from water. The adsorption process was found to be more favorable at lower temperatures, with electrostatic forces playing a significant role. The calculated equilibrium adsorption capacities were closer to the values predicted by the pseudo-second-order model.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Horticulture
Ozgun Kalkisim, Zuhal Okcu, Besim Karabulut, Duygu Ozdes, Celal Duran
Article
Chemistry, Physical
Mustafa Imamoglu, Asuman Ozturk, Seyma Aydin, Aynur Manzak, Ali Gundogdu, Celal Duran
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2018)
Article
Horticulture
Ozgun Kalkisim, Duygu Ozdes, Cemalettin Baltaci, Celal Duran
Article
Polymer Science
U. Alver, M. E. Tascioglu, O. Guler, M. Aslan, A. Yazgan, H. Kaya, C. Duran, H. Cuvalci, S. Bilgin
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2019)
Article
Chemistry, Analytical
Murat Yazar, Zekeriyya Bahadir, Celal Duran
Summary: A novel and fast salt-assisted bulk membrane extraction (SA-BME) combined with flame atomic absorption spectrometry (FAAS) method was proposed for the separation and preconcentration of Cr(VI) in water samples. The total chromium content in water samples could be successfully determined through a series of steps, and the method showed good recoveries in practical applications.
ANALYTICAL LETTERS
(2021)
Article
Environmental Sciences
Duygu Ozdes, Celal Duran
Summary: The study demonstrates the successful preparation of MPBC/CoFe2O4 for the magnetic solid-phase extraction of toxic heavy metal ions. By optimizing various parameters, including pH levels and adsorbent amounts, the sorbent showed high adsorption capacity for Cu2+, Cd2+, and Pb2+ ions. The method proved effective in detecting analytes in various samples, with minimal interference and rapid adsorption kinetics.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Chemistry, Analytical
Celal Duran, Duygu Ozdes
Summary: The current paper presents the first description of the coating of magnetic Fe(3)O(4)Alnus glutinosa sawdust biochar with SiO2 and functionalising it with CTAB. This method efficiently separates and preconcentrates Cu2+, Cd2+, and Pb(2+) ions in water and fruit samples. The developed method is simple, rapid, sensitive, and economical for simultaneous determination of these ions.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Zekeriyya Bahadir, Gokhan Kultur, Murat Yazar, Demet Cakir, Celal Duran
Summary: An alternative methodology based on the combination of microextraction with flame atomic absorption spectrometry (FAAS) is reported for the determination of Pd2+ in environmental samples. The method involves the use of CTAB as a surfactant and precipitating agent to form a complex with Pd2+ in the presence of iodide. The results show that this solvent-free microextraction is simple and sensitive for the preconcentration and determination of micrograms per liter of Pd2+ in various environmental samples.
ANALYTICAL LETTERS
(2022)
Article
Chemistry, Analytical
Ali Gundogdu, Pinar Bozbeyoglu, Mustafa Imamoglu, Cemalettin Baltaci, Celal Duran, Volkan N. Bulut
Summary: A promising new activated carbon was produced from corncobs using boric acid-based chemical activation. This activated carbon showed good adsorption capacity for both organic pollutant methylene blue and inorganic pollutant cadmium ions. The adsorption mechanisms of these pollutants on the activated carbon were discussed, considering factors such as pH, thermodynamics, and regeneration parameters. The results showed that the adsorption of cadmium ions was affected by pH and primarily occurred through electrostatic interaction, while the adsorption of methylene blue was pH-independent and involved pi-pi dispersion forces and partial hydrogen bonding. The study also revealed that temperature had a positive effect on the adsorption of both pollutants. The activated carbon demonstrated high adsorption capacities for methylene blue and cadmium ions.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Duygu Ozdes, Celal Duran, Hakan Bektas, Emre Mentese
Summary: In this study, the application of an organic coprecipitant DIBBA in a new CEFC method for the separation and preconcentration of Cu(II) ions in fruit and water samples was investigated for the first time. Through optimization of experimental conditions, a high preconcentration factor and satisfactory recoveries were achieved, demonstrating the feasibility of this method for low-level detection of Cu(II) ions in fruit and water samples.
JOURNAL OF THE SERBIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Aslihan Yilmaz Camoglu, Duygu Ozdes, Celal Duran
Summary: A novel magnetic Fe3O4 loaded and EDTA modified brewed tea waste (TW-Fe3O4-EDTA) was fabricated and tested as an adsorbent for the removal of Cr(VI) ions from aqueous medium. The adsorbent showed high adsorption capacity and good adsorption kinetics, making it a promising alternative to expensive adsorbents for heavy metal removal.
CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Analytical
Duygu Ozdes, Nida Tilki, Serdal Seker, Celal Duran
Summary: In this study, brewed tea waste (BTW) was used as a green and low-cost adsorbent for the separation and preconcentration of Cd(II) ions from water and food samples. A prediction model was developed using a three-layer artificial neural network and backpropagation algorithm. The accuracy of the method was confirmed through spike/recovery studies.
JOURNAL OF ANALYTICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Nurcan Ozturk, Murat Yazar, Ali Gundogdu, Celal Duran, Hasan Basri Senturk, Mustafa Soylak
Summary: A novel activated carbon produced from cherry laurel seeds was used as an effective adsorbent to remove Cr(VI) ions from aqueous solutions, with a monolayer adsorption capacity of 41.67 mg g(-1). This suggests that CLSAC can be a promising material for the removal of Cr(VI) from waters and wastewaters.
MEMBRANE AND WATER TREATMENT
(2021)
Article
Engineering, Chemical
Zekeriyya Bahadir, Murat Yazar, Sureyya Oguz Tumay, Huseyin Serencam, Hakan Bektas, Celal Duran
DESALINATION AND WATER TREATMENT
(2018)
Article
Engineering, Chemical
Nurcan Ozturk, Hasan Basri Senturk, Ali Gundogdu, Celal Durang
MEMBRANE AND WATER TREATMENT
(2018)
