Article
Chemistry, Physical
Shuyang Chen, Mei Zhang, Hanjie Chen, Ying Fang
Summary: In this study, raw talc powder was surface modified using two different methods: acid washing and ball milling. XRD, FTIR, and SEM were used to characterize the modified talc. Adsorption experiments were conducted using methylene blue (MB) as the target contaminant, and the findings showed that both modifications increased the adsorption capacity of talc. The results indicate that modified talc can be an inexpensive and abundant candidate material for dye adsorption in industrial wastewater.
Article
Environmental Sciences
Ahmed Abutaleb, Mohd Imran, Nasser Zouli, Afzal Husain Khan, Shahir Hussain, Mohammad Ashraf Ali, Omer Bakather, Mohammad Ashraf Gondal, Nadeem A. Khan, Hitesh Panchal, Sasan Zahmatkesh
Summary: The contamination of water due to the presence of dyes is a serious health problem that requires treatment. A tailored co-precipitation technique was successfully used to prepare Fe3O4-multiwalled Carbon Nanotubes (MWCNTs)-Bentonite nanocomposite. The synthesized nanocomposite showed high adsorption capacity and was determined to be a promising candidate for water treatment.
Article
Chemistry, Multidisciplinary
Linda Hevira, Zilfa, Rahmayeni, Joshua O. Ighalo, Hermansyah Aziz, Rahmiana Zein
Summary: This study demonstrated that using Terminalia catappa shells as biosorbent can effectively remove methylene blue from aqueous solutions, with a maximum adsorption capacity of 88.62 mg g(-1), and is applicable to real wastewater samples, which can be reused multiple times.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Thuong Thi Nguyen, Bich Ngoc Hoang, Thuan Van Tran, Dai Van Nguyen, Duy Nguyen Trinh, Dai-Viet N. Vo
Summary: The study introduced a method of preparing AMP-MMT composites for dye adsorption, exhibiting high adsorption capacity, recyclability, and potential application in water purification. The mechanisms, operating parameters, and performance of the composite membrane were investigated, providing insights into eco-friendly and biodegradable materials for environmental protection.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Youssef Ettahiri, Lahcen Bouna, John Hanna, Abdeljalil Benlhachemi, Hannah L. Pilsworth, Abdessalam Bouddouch, Bahcine Bakiz
Summary: This study synthesized and characterized porous geopolymer systems using a naturally occurring Moroccan pyrophyllite clay. The geopolymer matrix was formed through alkaline activation of metakaolin, with little contribution from pyrophyllite. Pyrophyllite played a role in promoting the formation of disordered and heterogeneous geopolymers and pores. The structures and morphologies of the raw clay, calcined meta-pyrophyllite, and prepared geopolymer samples were analyzed using various techniques. The specific surface area and pore volume of the geopolymer samples significantly increased compared to the raw clay. Adsorption experiments showed that the chemisorption of MB molecules onto the geopolymer specimen was spontaneous, irreversible, and endothermic, with a high quantity of adsorbed molecules.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Suhad Abdulrahman Yasin, Samie Yaseen Sharaf Zeebaree, Aymn Yaseen Sharaf Zeebaree, Osama Ismail Haji Zebari, Ibtisam Abdulmajeed Saeed
Summary: The research investigates the application of green methods in producing nanocomposites, utilizing electrospinning techniques and natural plant extract to synthesize copper nanoparticles. The produced CuO/PET nanocomposites exhibit high surface area, well-distributed elements, and efficient photocatalytic removal of toxic dyes in aqueous solutions. The study demonstrates that the photocatalytic efficiency for removing dyes is achieved in a short time under low-intensity UV light irradiation.
Article
Water Resources
Nadjib Benosmane, Baya Boutemeur, Safouane M. Hamdi, Maamar Hamdi
Summary: In this study, polymer inclusion membranes (PIMs) containing Cellulose triacetate as polymer base, 2-NPOE as a plasticizer, and Calix[4]resorcinarene (RC8) as a carrier were prepared and characterized. The content of the carrier and plasticizer in the membrane were found to significantly affect the properties of PIMs. The membrane showed better stability under optimum conditions, and the transport of Methylene Blue (MB) dye followed the first-order kinetics equation.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Dalia Abdrabou, Mohamed Ahmed, Ali Hussein, Tharwat El-Sherbini
Summary: Efficient cleaning of contaminated water by photocatalysis has become an important strategy for environmental protection. The combination of CdS with Gd2O3 and GO has been found to enhance the photocatalytic efficiency. Under visible light irradiation, the removal efficiency of Gd2O3@CA, CdS/Gd2O3@CA, and CdS/Gd2O3/GO@CA is 41.02%, 54.71%, and 71.42%, respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Yue Zhang, Yulin Zheng, Yicheng Yang, Jinsheng Huang, Andrew R. Zimmerman, Hao Chen, Xin Hu, Bin Gao
Summary: Ball milling and H2O2 modification significantly increased the specific surface area of biochar and enhanced its adsorption efficiency towards methylene blue. The modified biochar had more oxygen-containing functional groups, leading to a faster adsorption rate for methylene blue.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ahmed Abdi Hassan, Muhammad Sajid, Abdulkadir Tanimu, Ismail Abdulazeez, Khalid Alhooshani
Summary: In this study, an ionic liquid 1-naphthylammonium tetrachloroferrate (III) was synthesized and used as a solid adsorbent for the removal of methylene blue and rose bengal dyes from aqueous solutions. Experimental results showed strong adsorption capacity of the adsorbent for the dyes, suggesting its potential application in dye removal processes.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Giannin Mosoarca, Simona Popa, Cosmin Vancea, Mircea Dan, Sorina Boran
Summary: In this study, raspberry leaves were converted into powder and used as a new low-cost adsorbent for removing methylene blue from aqueous solutions. Various techniques were applied for characterizing the adsorbent, and the effects of pH, ionic strength, contact time, adsorbent dose, initial concentration, and temperature on adsorption capacity were investigated. The research showed that the adsorption process is spontaneous, favorable, and endothermic, and the maximum adsorption capacity of the raspberry leaf powder was higher compared to other plant leaf-based adsorbents.
Article
Materials Science, Multidisciplinary
Elham Taghipour, Nemat Tahmasebi
Summary: In this study, MoO3/MoO2 composite nanoparticles were successfully prepared using a one-step hydrothermal method with PVA as a reducing agent. The composite nanoparticles showed a significantly higher adsorption capacity for methylene blue compared to pure MoO3 and MoO2 samples, reaching 95% within 30 minutes. The Langmuir model demonstrated a maximum adsorption capacity of 1250 mg/g for MB on the composite nanoparticles, indicating their potential for practical applications in water treatment.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Yamil L. O. de Salomon, Jordana Georgin, Dison S. P. Franco, Matias Schadeck Netto, Edson Luiz Foletto, Daniel Allasia, Guilherme Luiz Dotto
Summary: The study on novel ecological and low-cost adsorbents prepared from seed residues of tree species showed great potential for efficient removal of colored contaminants in wastewater, with high color removal rates of 74% and 78% using different samples. The materials exhibited suitable adsorption kinetics and equilibrium behaviors, indicating their effectiveness in treating simulated effluent. The thermodynamic indicators suggested that the adsorption process was spontaneous and endothermic for both materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Roshni D. Hingrajiya, Manish P. Patel
Summary: The present research focuses on the fabrication and characterization of magnetic Fe3O4 incorporated chitosan grafted acrylamide and N-vinylimidazole composite hydrogels (CANFe-1 to CANFe-7). The swelling study showed that CANFe-4 had the highest swelling efficiency, thus it was chosen for the subsequent removal studies. The pH sensitive adsorptive removal of cationic dye (methylene blue) was dominant at pH = 8, with a maximum adsorption capacity of 860 mg/g. The CANFe-4 composite hydrogel can be conveniently separated from the solution using an external magnet, making it a promising adsorbent for wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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
Chemistry, Analytical
Cafer Saka, Gulten Elci Olcenoglu, Omer Sahin
Summary: The petroleum coke sample (PCS) was successfully modified for the first time by oxygen plasma treatment (OPT), increasing the new active groups containing oxygen on the PCS surface, and removing malachite green dye from the aqueous medium.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Ibrahim Tegin, Cafer Saka
Summary: This study investigated the removal of methylene blue by both raw and modified clay, with the modified clay showing significant improvements in adsorption capacity. The modification process included calcination, acid treatment, and second calcination, with factors such as calcination temperature and acid/base concentration affecting the adsorption capacity. Characterization of the clay was done by SEM and FTIR, and Langmuir and Freundlich isotherm models were used to analyze the results.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Cafer Saka, Asim Balbay
Summary: For the first time, phosphoric acid and acetic acid catalysts were used for efficient hydrogen production from sodium borohydride ethylene glycolysis reaction. The experimental results showed that the presence of water negatively affects H-2 production. The hydrogen generation rate obtained with H3PO4 and CH3COOH catalysts were 5800 and 4542 mL/min, respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
I Tegin, M. S. Batur, O. Yavuz, C. Saka
Summary: This study investigates a low-cost and economical heat-treated clay sample as a potential adsorbent for the removal of Cu(II), Pb(II) and Cd(II) ions from aqueous solutions. The results show that the adsorption ability of the heat-treated clay adsorbent is significantly improved compared to the raw clay sample.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Cafer Saka, Yavuz Yardim, Omer Sahin, Orhan Baytar
Summary: This study investigates the application of chestnut shell-based activated carbon in iodine adsorption and as an electrochemical double-layer capacitor material. The results show that chestnut shell-based activated carbon exhibits excellent performance in adsorption and capacitor properties.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Chemistry, Physical
Yasar Genel, Ilyas Genel, Cafer Saka
Summary: Activated carbons synthesized from the ash tree were found to be effective adsorbents for removing methylene blue from aqueous solutions. The carbonaceous materials exhibited mesoporous structures and active functional groups. The highest adsorption capacities were obtained with chemical activation using zinc chloride and sodium hydroxide.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Chemistry, Physical
Cafer Saka
Summary: This study focuses on the production of two-stage metal-free catalysts from pistachio shells. The first stage involves the production of activated carbon (AC), while the second stage involves the production of catalysts doped with heteroatoms through hydrothermal heating of the obtained activated carbon with nitric acid. The metal-free catalysts are then used for hydrogen production from sodium borohydride (NaBH4) in methanol.
Article
Materials Science, Multidisciplinary
Cafer Saka, Ibrahim Tegin, Kubra Kahvecioglu
Summary: This study focuses on enhancing the adsorption capacity of activated carbon by sulphur doping, using almond shells as the base material. The results showed that sulphur doped activated carbon exhibits high adsorption performance for Cd(II) and follows Langmuir isotherm and pseudo-second-order kinetic models.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Environmental Sciences
Kubra Kahvecioglu, Ibrahim Tegin, Omer Yavuz, Cafer Saka
Summary: In this study, activated carbon based on almond shells was produced through microwave heating and then modified with phosphorus and oxygen through hydrothermal heating. The modified activated carbon showed improved adsorption efficiency for Cd(II) and Pb(II) ions. The results indicated that the modified activated carbon follows Langmuir isotherm and pseudo-second-order kinetics for adsorption of both Cd(II) and Pb(II).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Cafer Saka
Summary: The surface properties of graphitic carbon nitride (GCN) were enhanced by doping with sulphur (S), boron (B), and oxygen (O). Metal-free GCN catalysts with heteroatom dopants showed improved surface functional groups and a carbon defect structure. These catalysts were used for hydrogen production from sodium borohydride (SB) methanolysis, resulting in a 2.2-fold increase in H2 production compared to GCN. The HGR value obtained with B, O, and S doped GCN was 9166 ml min-1g-1. XPS, SEM-EDX, TEM, FTIR, and XRD analyses were performed to investigate the structural properties of the catalysts, and the activation energy (Ea) for B, O, and S doped GCN was determined to be 28.89 kJ mol-1.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Cafer Saka
Summary: Hybrid kaolin-g-C3N4 heterostructure particles were fabricated and phosphorus and oxygen doped kaolin-g-C3N4 metal-free catalyst was synthesized for the first time for effective hydrogen production from sodium borohydride methanolysis. The catalyst showed a hydrogen generation rate of 5500 ml min-1g-1 and an activation energy of 31.90 kJ mol-1. The kaolin-g-C3N4 and doped catalysts were characterized by various techniques, and a mechanism for hydrogen production was proposed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Cetin Murtazaoglu, Ibrahim Tegin, Cafer Saka
Summary: In this study, activated carbon (AC) was produced from pistachio shells using potassium hydroxide (KOH) activation, and then modified with hydrogen peroxide (H2O2). The modified AC (KOH-AC-H2O2) was found to effectively adsorb Cu (II) and Zn (II) ions from wastewater, with adsorption behavior in accordance with the Langmuir isotherm model.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Yavuz Yardim, Cafer Saka
Summary: This study investigated the thermal activation of Chlorella vulgaris and Spirulina platensis microalgae using potassium hydroxide (KOH) in a carbon dioxide (CO2) atmosphere, followed by the hydrothermal interaction with nitric acid to form nitrogen and oxygen-doped activated carbons. These carbons were then used to fabricate electrochemical supercapacitors. The morphological properties of the obtained pores were characterized by transmission electron microscopy (TEM), and the electrochemical properties were evaluated by cyclic voltammetry (CV) in different electrolytes. The results showed that the nitrogen and oxygen-doped electrode based on Spirulina platensis microalgae exhibited the highest specific capacitance of 99.53 Fg(-1) in a 1 M H2SO4 electrolyte, while the supercapacitor based on the activated carbon electrode from Chlorella vulgaris microalgae showed the highest specific capacitance of 156.04 Fg(-1) in a 1 M KCl electrolyte.
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
(2023)
Article
Energy & Fuels
Cafer Saka, Ibrahim Tegin, Kubra Kahvecioglu, Omer Yavuz
Summary: In this study, a two-step method was employed to produce an effective adsorbent for the adsorption of cadmium (Cd) (II) and lead (Pb)(II). The method involved the preparation of activated carbon (AC) from almond shells using microwave heating and potassium hydroxide (KOH), followed by nitrogen and oxygen doping through hydrothermal treatment with nitric acid. The resulting materials were characterized and their adsorption performance, mechanism, kinetics, and thermodynamics were evaluated. The nitrogen- and oxygen-doped ACs exhibited good adsorption capacity for Cd (II) and Pb (II), with values of 106.38 mg/g and 76.33 mg/g, respectively.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Environmental Sciences
Cafer Saka
Summary: In this study, phosphorus and boron-doped graphitic carbon nitride/zeolite catalysts were prepared under three-step heating conditions. The catalysts were characterized using various techniques, and it was found that they can be used as metal-free catalysts for hydrogen production from sodium borohydride in methanol. The hydrogen production rate for these catalysts was measured to be 6250 ml min(-1) g(-1), which is reported for the first time in the literature.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)