Article
Environmental Sciences
V Thirumal, R. Yuvakkumar, G. Ravi, G. Dineshkumar, M. Ganesan, Saad H. Alotaibi, Dhayalan Velauthapillai
Summary: This study explored a facile synthesis of chemical and thermal activation of biomass tea-waste materials, developing a porous activated carbon material with good morphological structures and transparent layered nanosheets. It showed excellent electrochemical performance and is a promising active material for high-energy supercapacitor applications.
Article
Chemistry, Multidisciplinary
Egert Moller, Rasmus Palm, Kenneth Tuul, Meelis Harmas, Miriam Koppel, Jaan Aruvali, Marian Kulaviir, Enn Lust
Summary: This study synthesized highly ultramicroporous carbon materials by chemically activating peat with low concentrations of ZnCl2, resulting in high micropore ratios and efficient hydrogen adsorption under low-pressure conditions.
Article
Energy & Fuels
Xiaoli Bai, Bingyan Quan, Chaoyan Kang, Xianglong Zhang, Yu Zheng, Jia Song, Ting Xia, Min Wang
Summary: Tea residue can be used to prepare activated carbon with excellent adsorption performance for wastewater treatment. ZnCl2-derived activated carbon shows the highest iodine number. The optimized activated carbon has a well-developed microporous structure and high specific surface area, providing promising potential for the removal of heavy metals, pigments, and pesticide residues.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Catarina H. Pimentel, M. Sonia Freire, Diego Gomez-Diaz, Julia Gonzalez-alvarez
Summary: To solve the problem of wastewater containing dyes, researchers prepared a novel activated carbon from untreated pine sawdust and used it for dye adsorption. The activated carbon showed high surface area and microporosity, and exhibited good adsorption performance for blue and black dyes. The adsorption equilibrium data for blue and black dyes fit well in the Freundlich model, while that for the red dye fit in the Langmuir model.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Reyna Berenice Gonzalez-Gonzalez, Lucy Teresa Gonzalez, Marc Madou, Cesar Leyva-Porras, Sergio Omar Martinez-Chapa, Alberto Mendoza
Summary: In this study, carbon dots were synthesized from activated and non-activated pyrolytic carbon black obtained from waste tires and chemically oxidized with HNO3. The effects on carbon dot properties were analyzed using various characterization techniques. The results showed that carbon dots from activated precursors exhibited different photoluminescence properties compared to those from non-activated precursors. Additionally, a dialysis method was proposed to purify the carbon dots.
Article
Energy & Fuels
Amany G. M. Shoaib, Amany El-Sikaily, Ahmed El Nemr, Alaa El-Deen A. Mohamed, Asaad A. Hassan
Summary: Activated carbon materials with high specific surface area were produced from red alga Pterocladia capillacea. The activated carbon showed a honeycomb morphology and had a significant amount of micro- and mesopores, which contributed to its excellent adsorption properties towards iodine and methylene blue.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Applied
Baihong Li, Chao Li, Dianqiang Li, Lijun Zhang, Shu Zhang, Zhenhua Cui, Dong Wang, Yonggui Tang, Xun Hu
Summary: This study investigates the evolution of functionalities and structure of activated carbon (AC) generated from pine needles activated with ZnCl2 at different temperatures. The results show that ZnCl2 can catalyze the dehydration, condensation, and aromatization reactions of sugary structures, leading to a significant increase in the yield of solid product (AC), and the resulting AC exhibits a high sensitivity to temperature. Furthermore, ZnCl2 can also catalyze the dehydration of hydroxyl group and the conversion of carbonyls in aldehydes/ketones. However, above 500 degrees C, the transformation of ZnCl2 to ZnO leads to the loss of catalytic activity.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Gaoxu Han, Jianbo Jia, Quanrun Liu, Guangxu Huang, Baolin Xing, Chuanxiang Zhang, Yijun Cao
Summary: A series of coal-based hierarchical porous carbons with adjustable pores were successfully prepared using Zinc chloride as a template during the carbonization process, leading to improved electrical conductivity and specific capacitance of the products.
Article
Energy & Fuels
Ahmed El Nemr, Rawan M. Aboughaly, Amany El Sikaily, Safaa Ragab, Mamdouh S. Masoud, Mohamed S. Ramadan
Summary: In this study, microporous nano activated carbons (OPAC) were prepared from orange (Citrus aurantium) peel using a one-step chemical activation process by zinc chloride. The effects of carbonization temperature, impregnation ratio, and impregnation time on the properties of the OPAC were investigated. The results showed that the highest surface area of OPAC was achieved with a 2:1 impregnation ratio, a carbonization temperature of 700 degrees C, and a 30-minute holding time. The prepared activated carbons exhibited high BET surface area, total pore volume, and micropore volume, indicating the effectiveness of the zinc chloride chemical activation method for preparing activated carbon with nano pore size structure from orange peel.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Ahmed El Nemr, Rawan M. Aboughaly, Amany El Sikaily, Mamdouh S. Masoud, Mohamed S. Ramadan, Safaa Ragab
Summary: Sugarcane bagasse was utilized as a substrate for the production of activated carbon, with zinc chloride as the activating agent, and the effects of different carbonization temperatures on the properties of activated carbon were investigated. The study found that the maximum surface area and pore volume of the prepared activated carbon were achieved at 600 degrees Celsius with a 2/1 impregnation ratio.
Article
Energy & Fuels
Pua Eng Hock, Muhammad Abbas Ahmad Zaini
Summary: This study aimed to evaluate the adsorptive properties of glycerine pitch distillate-based activated carbons by zinc chloride activation. The results showed that these activated carbons have high specific surface area and maximum adsorption capacity, making them suitable for dye wastewater treatment.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Environmental
Ekta R. Raut, Monita A. Bedmohata (Thakur), Archana R. Chaudhari
Summary: This paper describes the preparation of cost-effective activated carbon from sugarcane bagasse using zinc chloride as a chemical activator. The activated carbon was characterized and evaluated for its effectiveness using various techniques. The results showed that the impregnation ratio and activation temperature played a crucial role in determining the properties of the activated carbon. The obtained product exhibited better characteristics than previous research studies.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Cansu Guclu, Koray Alper, Murat Erdem, Kubilay Tekin, Selhan Karagoz
Summary: This study investigated the co-carbonization of waste truck tires and spent tea leaves using different blend ratios and chemical activating reagents at 800°C. The highest BET surface area was obtained with the use of ZnCl2 activation at a blend ratio of 1:3 (WTT/STL), resulting in higher carbon content and lower oxygen content compared to KOH activation. The oxygen removal efficiency of ZnCl2 was also found to be higher than that of KOH, producing activated carbons with comparable BET surface areas to commercially produced activated carbons.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Chemistry, Multidisciplinary
Wasutha Thongpat, Juntakan Taweekun, Kittinan Maliwan
Summary: This study investigated the impact of impregnation ratio and activation temperature on the microporous development of activated carbon derived from rubberwood chips using potassium hydroxide as the activation agent. The results showed that activated carbon produced with a 1:3 impregnation ratio and activated at 800 degrees Celsius exhibited the highest surface area, pore volume, and micropore volume.
Article
Energy & Fuels
Hale Sutcu
Summary: The study investigated the production of activated carbon from Rhododendron ponticum L. through physical and chemical activation methods. Both methods were successful in producing activated carbon, with structural characterization conducted through nitrogen adsorption and scanning electron microscope analysis.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Analytical
Mustafa Soylak, Rizqan Maulana
Summary: In this study, copper (II) and lead (II) ions were complexed with 1-nitroso-2-naphthol and preconcentrated on magnetic activated carbon cloth for flame atomic absorption spectrometric detection. Through the optimization of multiple parameters, a quantitative recovery of analyte ions was achieved, and the method was successfully applied for separation and preconcentration of copper (II) and lead (II) ions in water and food samples.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
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
Mustafa Soylak, Fidan Kestane, Erkan Yilmaz
Summary: CdSe-carbon nanodots modified magnetic Fe3O4 nanospheres were synthesized via a simple hydrothermal technique and used as an MSPE adsorbent for malachite green determination. The method was optimized for parameters affecting microextraction efficiency, and validated through addition-recovery tests with recovery values ranging from 85% to 104%. The LOD and LOQ of the method were determined to be 0.013 μg mL(-1) and 0.042 μg mL(-1), respectively.
INSTRUMENTATION SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Mustafa Soylak, Sabri Baran, Furkan Uzcan
Summary: A novel liquid phase microextraction method based on environmental-friendly deep eutectic solvent has been developed for the separation-preconcentration and spectrophotometric determination of amaranth. The method provides quantitative recoveries with high sensitivity and accuracy, making it suitable for analyzing food and water samples.
INSTRUMENTATION SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Ozgur Ozalp, Ozlem Kaya, Mustafa Soylak
Summary: A cloud point extraction procedure was developed for the separation and preconcentration of Sudan IV, followed by spectrophotometric detection. Optimized conditions were achieved by adjusting various parameters. The method was successfully applied for the determination of Sudan IV in chili-containing foods and cosmetics.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Analytical
Cigdem Ozer, Mustafa Imamoglu
Summary: This study investigated the removal of nickel(II) and lead(II) ions from aqueous solutions using pumpkin peel biochar prepared with sulfuric acid. The experimental results showed that the pH of the solution, contact time, dosage, and initial concentration of the metal ions significantly affected their removal. The pumpkin peel biochar exhibited high adsorption capacities for nickel(II) and lead(II) ions, with maximum monolayer adsorption capacities of 64.1 and 178.6 mg g(-1), respectively.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Analytical
Mustafa Soylak, Ali Osman Sevicin, Furkan Uzcan
Summary: A magnetic solid phase extraction (MSPE) method for determining nickel was established using carbon magnetic multiwalled carbon nanotubes as adsorbent. Various parameters were optimized to enhance the extraction efficiency of nickel. The method was applied to evaluate accuracy in water samples and determine nickel in tobacco samples.
ANALYTICAL LETTERS
(2023)
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, Analytical
Mustafa Imamoglu
Summary: A novel functionalized silica gel was successfully fabricated and utilized for flow-injection solid-phase extraction (FI-SPE) of Cu(II) ions in environmental water samples. By studying various practical factors, the FI-SPE method was optimized and successfully validated by the determination of Cu(II) in certified reference materials. The method was also successfully applied for Cu(II) determination in environmental water samples.
ANALYTICAL LETTERS
(2023)
Editorial Material
Chemistry, Analytical
Mustafa Soylak, Resat Apak
Summary: This special issue of Analytical Letters features selected articles from the Third International Congress of Environmental Chemistry (EnviroChem 2021), in which the authors have expanded upon their conference papers and included their latest experimental results. EnviroChem 2021 aimed to promote and disseminate knowledge on various topics and technologies related to Environmental Chemistry. All articles have undergone the standard review process.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Analytical
Aslihan Karatepe, Mustafa Yemen, Faruk Kayapa, Erkan Yilmaz, Fatma Karipcin, Mustafa Soylak
Summary: A new oxime compound, BIBP, was synthesized and used to preconcentrate trace amounts of Pb(II) ions. The compound was characterized and optimized, and successfully applied for Pb(II) determination in real samples.
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
Chemistry, Analytical
Guanshuai Zhang, Shanjian Liu, Dongmei Bi, Zhisen He, Jia Liu, Yinjiao Liu
Summary: Hydrogen peroxide pretreatment was applied for fast pyrolysis of corn stalks, and it was found that the pretreatment effectively promoted lignin depolymerization and decreased the reaction activation energy. The pretreatment also increased the cellulose content and removed alkali and alkaline earth metals from the biomass. The pH of the hydrogen peroxide solution affected the removal of lignin and ash by the pretreatment, and the composition of bio-oil changed significantly, with a significant increase in the relative content of levoglucosan after pretreatment.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2024)
