Article
Polymer Science
Nouf F. Al-Harby, Ebtehal F. Albahly, Nadia A. Mohamed
Summary: A novel uracil-modified chitosan (UCs) adsorbent has been successfully synthesized and its structure and adsorption performance have been studied. The results show that the adsorption capacity of UCs for anionic Congo Red dye is related to factors such as solution pH, dye concentration, and temperature. The adsorption process follows pseudo-second order and Elovich models, and involves multiple steps. The isotherm analysis indicates that the adsorption of CR dye by UCs follows the Langmuir model, suggesting monolayer adsorption. Thermodynamic analysis shows that the adsorption process is endothermic and leads to increased randomness in the system.
Article
Multidisciplinary Sciences
Mohamed M. Abou Alsoaud, Mahmoud A. Taher, Abdelrahman M. Hamed, Mohamed S. Elnouby, Ahmed M. Omer
Summary: In this study, Kaolin (K) impregnated aminated chitosan (AM-CTS) composite beads were fabricated and used for the adsorption of anionic Congo red (CR) dye. The results showed that the K@AM-CTS composite beads had a larger specific surface area and improved thermal stability compared to pure AM-CTS. The adsorption equilibrium of CR dye was achieved rapidly and the removal efficiency increased with increasing kaolin content. The adsorption process followed the pseudo-first order kinetic model and the Freundlich isotherm model, and was determined to be physical adsorption with spontaneous and endothermic nature. The developed K@AM-CTS composites beads demonstrated good reusability.
SCIENTIFIC REPORTS
(2022)
Article
Polymer Science
Rana A. Alharbi, Fahad M. Alminderej, Nouf F. Al-Harby, Noura Y. Elmehbad, Nadia A. Mohamed
Summary: A new hydrogel based on chitosan crosslinked with 2-chlorophenyl-bis(6-amino-1,3-dimethyluracil-5-yl) methane has been developed and proven through various techniques. Its efficiency in removing anionic Congo red dye in industrial wastewater was studied, and the optimal conditions for removal were investigated. The hydrogel showed a high adsorption capacity for the dye and had potential as a reusable adsorbent for industrial wastewater remediation.
Article
Chemistry, Multidisciplinary
Maadri A. Pathirana, Nethmi S. L. Dissanayake, Nandula D. Wanasekara, Boris Mahltig, Gayani K. Nandasiri
Summary: Textile wastewater contains toxic organic contaminants that could harm the ecosystem. Methylene blue and Congo red are two commonly found dyes that need to be removed. This study investigates the use of a chitosan-graphene oxide nanofiber membrane for efficient removal of these dyes. Various characterization techniques were used to analyze the fabricated nanocomposite. The results show that the membrane has a high adsorptive capacity for both methylene blue and Congo red.
Article
Biotechnology & Applied Microbiology
Peyman Koohi, Ahmad Rahbar-kelishami, Hadi Shayesteh
Summary: In this study, the adsorption of congo red using Fe3O4/NiO magnetic nanocomposites was investigated, with the Langmuir model showing the best fit. Results indicated that Fe3O4/NiO nanocomposites have high efficiency and low equilibrium time for CR removal.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Dang Le Tri Nguyen, Quach An Binh, Xuan Cuong Nguyen, Thi Thanh Huyen Nguyen, Quang Nha Vo, Trung Duong Nguyen, Thi Cuc Phuong Tran, Thi An Hang Nguyen, Soo Young Kim, Thang Phan Nguyen, Jaehan Bae, Il Tae Kim, Quyet Van Le
Summary: Novel biochars derived from agro-waste like Acacia auriculiformis, modified with metal salts of FeCl3, AlCl3, and CaCl2 at 500 degrees C pyrolysis, were developed to enhance CR treatment. These modified biochars showed improved performance in CR removal, with FeCl3-biochar identified as the preferred choice for application due to its high adsorption capacity and magnetic properties.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
Yumei Tan, Yutang Kang, Wenwen Wang, Xinyan Lv, Boran Wang, Qi Zhang, Canyu Cui, Shuya Cui, Shihui Jiao, Guangsheng Pang, Shouhua Feng
Summary: The chitosan modified hydrogen titanate nanowires membrane prepared through a simple method demonstrates outstanding adsorption performance for anionic dye Congo red, showing excellent removal rate and adsorption capacity, as well as maintaining high removal rate and permeability after multiple cycles.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Composites
Vahid Zeynali, Seyed Mahmoud Mousavi, Ehsan Saljoughi, Shirin Kiani, Mika Sillanpaa
Summary: This study focused on the fabrication of a novel chitosan/polyvinyl alcohol/hydroxyapatite (CPH) nanocomposite membrane and its application in removing Congo red (CR) from aqueous solutions. Adsorption tests were conducted on the optimized nanocomposite membrane containing 1 wt% hydroxyapatite after proper characterization. The impact of various factors on adsorption, such as temperature, contact time, initial dye concentration, adsorbent dosage, and pH, was investigated. Langmuir isotherm and pseudo-second order kinetics were found to best fit the experimental results, with an adsorption capacity of 491 mg/g.
POLYMER COMPOSITES
(2023)
Article
Biochemistry & Molecular Biology
Yong Yang, Nisar Ali, Adnan Khan, Saraf Khan, Sana Khan, Hammad Khan, Shi Xiaoqi, Waqar Ahmad, Salah Uddin, Nauman Ali, Muhammad Bilal
Summary: The visible-light-driven ternary metal selenide nanocomposites supported by chitosan microspheres were successfully synthesized and applied for the photodegradation of organic dye pollutants. The catalyst microspheres showed efficient photocatalytic degradation efficiency of up to 99% for dye pollutants under sunlight irradiation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biotechnology & Applied Microbiology
Saraf Khan, Adnan Khan, Nisar Ali, Shehzad Ahmad, Waqar Ahmad, Sumeet Malik, Nauman Ali, Hammad Khan, Sumaira Shah, Muhammad Bilal
Summary: The study focused on utilizing ternary metal selenide-chitosan microspheres for photocatalytic degradation of dyes in water pollution, showing efficient decontamination of dyes in industrial wastewater.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Multidisciplinary Sciences
Maria Harja, Gabriela Buema, Daniel Bucur
Summary: This study successfully removed Congo Red dye from simulated textile wastewater using fly ash from a local power plant, and comprehensively characterized the fly ash. The results showed that the adsorption capacity of the dye depended on various factors, including contact time, initial concentration, adsorbent dose, and temperature. The removal process was found to be a chemical adsorption, as indicated by the fit to pseudo-second-order kinetics models. The Langmuir model provided a good fit to the experimental data, with a maximum adsorption capacity of 22.12 mg/g. This preliminary case study highlights the great potential of fly ash as a material for Congo Red dye removal.
SCIENTIFIC REPORTS
(2022)
Article
Biotechnology & Applied Microbiology
Ravi Kumar Sonwani, Ganesh Swain, Ravi Prakash Jaiswal, Ram Sharan Singh, Birendra Nath Rai
Summary: In this study, a modified carrier was used to remove Congo red dye from synthetic wastewater in a moving bed biofilm reactor. The research examined the removal efficiency and kinetic aspects of the dye under different conditions, with the proposed kinetic equations able to predict effluent concentration and estimate reactor volume for scaling up the process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Weisen Yang, Yifei Liu, Yaqin Zhu, Wenlong Jiang, Fengshuo Shi, Jiapeng Hu, Shaohua Jiang, Shaoju Jian
Summary: In this study, two chitosan-based magnetic microspheres were successfully synthesized and used for the adsorption removal of dyes in wastewater. The results showed that these magnetic microspheres exhibited excellent adsorption performance for the dyes, and they also demonstrated good stability and recyclability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Hui Wang, Wei Luo, Ruyao Guo, Doudou Li, Bingchun Xue
Summary: Chitosan@Fe3O4 material was successfully synthesized by a ball milling method and characterized. The material was used for the removal of dye CR, and the adsorption behavior and recycling performance were studied.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Spectroscopy
Muthuchamy Maruthupandy, Thillaichidambaram Muneeswaran, Thirumalaiswamy Vennila, Muthusamy Anand, Wan-Seob Cho, Franck Quero
Summary: Chitosan/Fe3O4 nanospheres exhibit significantly improved photocatalytic activity against CR dye molecules under visible light compared to Fe3O4 nanospheres.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Biotechnology & Applied Microbiology
Aysegul Ulku Metin, Erol Alver
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2016)
Article
Chemistry, Analytical
Hakan Ciftci, Erol Alver, Filiz Celik, Aysegul U. Metin, Ugur Tamer
Article
Biotechnology & Applied Microbiology
Erol Alver, Aysegul Ulku Metin
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2017)
Article
Engineering, Environmental
Erol Alver, Aysegul U. Metin
CHEMICAL ENGINEERING JOURNAL
(2012)
Article
Engineering, Chemical
Aysegul U. Metin, Hakan Ciftci, Erol Alver
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2013)
Article
Electrochemistry
Hakan Ciftci, Ugur Tamer, Aysegul U. Metin, Erol Alver, Nevin Kizir
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2014)
Article
Polymer Science
Erol Alver, Aysegul U. Metin, Hakan Ciftci
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2014)
Article
Biochemical Research Methods
Ayla Demirci, Erol Alver
JOURNAL OF LIQUID CHROMATOGRAPHY & RELATED TECHNOLOGIES
(2013)
Article
Biotechnology & Applied Microbiology
Mustafa Turk, Ugur Tamer, Erol Alver, Hakan Ciftci, Aysegul U. Metin, Siyami Karahan
ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY
(2013)
Article
Biochemistry & Molecular Biology
Erol Alver, Aysegul Ulku Metin, Francois Brouers
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Engineering, Multidisciplinary
Erol Alver, Aysegul Ulku Metin, Hakan Ciftci
SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI
(2015)
Review
Engineering, Multidisciplinary
Erol Alver, Ayla Demirci, Mustafa Ozcimder
SIGMA JOURNAL OF ENGINEERING AND NATURAL SCIENCES-SIGMA MUHENDISLIK VE FEN BILIMLERI DERGISI
(2012)
Article
Spectroscopy
Zh. E. Ozbekova, A. A. Abdyldaev, A. A. Kulmyrzaev
Summary: This study compared two drying methods for cow and yak muscles, finding that freeze drying caused less discoloration. Additionally, analysis of fluorescence spectra allowed for accurate prediction of chemical composition and color characteristics of the muscles.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Leo Mandic, Ivan Ljubic, Iva Dzeba
Summary: In this study, a combined experimental and computational approach was used to investigate the photoexcitation and photodegradation mechanisms of Doxazosin (DOX). The results provide valuable insights into the primary events following the photoexcitation of DOX and its potential applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiufeng Wang, Yao Jin, Wenhui Ai, Siqi Wang, Zhiqing Zhang, Ting Zhou, Fang Wang, Guodong Zhang
Summary: This study successfully synthesized near infrared fluorescence Ag2S quantum dots (QDs) and developed a dual-mode sensor for sulfide anion using the excellent oxidase-like characteristics of manganese dioxide (MnO2) nanosheets. The sensor showed a wider detection range, higher sensitivity, and shorter reaction time, making it suitable for highly selective detection of sulfide in different concentration ranges.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yafei Li, Yanming Ma, Chuantao Zheng, Di Yu, Lien Hu, Shuo Yang, Fang Song, Yadan Li, Shuanghai Liu, Zhanrui Zhang, Yu Zhang, Yiding Wang, Frank K. Tittel
Summary: To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH4) and carbon monoxide (CO) measurement. The system achieved different measurement ranges using laser scanning and gas cells, and improved stability and accuracy through gas pre-treatment and temperature compensation algorithm.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Pei-Rong Chen, Li-Kang Chu
Summary: In this study, the hydrates of glyoxal were investigated using infrared absorption spectrometry. The results showed that at low concentrations, glyoxal mainly exists as monomeric dihydrate. These findings provide suitable detection windows for further research on the roles of glyoxal and its hydrates in atmospheric and aerosol chemistry, as well as the relevant reaction kinetics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Nichole O'Neill, Thamires A. Lima, Fabio Furlan Ferreira, Nicolas J. Alvarez, Reinhard Schweitzer-Stenner
Summary: This study determines the main fibril axis of GHG gel-forming fibrils using various techniques and compares the results with simulated data. The analysis suggests that the hydrophobic xz-surfaces of GHG fibrils could be a good target for the adsorption of hydrophobic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Mengyuan Liu, Hanchuang Zhu, Yikun Fang, Caiyun Liu, Xinke Li, Xiaohui Zhang, Lixue Ma, Kun Wang, Miaohui Yu, Wenlong Sheng, Baocun Zhu
Summary: ABHS is an efficient fluorescent probe that can accurately and sensitively detect Al3+ with strong resistance to interference. It also demonstrates excellent detection and imaging capabilities in complex real samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Anindita Bhatta, Jahnabi Upadhyaya, Dipak Chamlagai, Lincoln Dkhar, Pynskhemborlang T. Phanrang, Mohan Rao Kollipara, Sivaprasad Mitra
Summary: Derivatives of thiazole-pyrazole fused benzo-coumarin compounds were synthesized and their photophysical properties were investigated. The synthesized coumarin compounds showed potential as therapeutic agents for Alzheimer's disease, inhibiting acetylcholinesterase activity. The presence of human serum albumin was found to affect the inhibition activity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yongwei Duan, Quancheng Liu, Yiju Zhu, Qi Zhang, Xiaohui Duan, Hu Deng, Liping Shang
Summary: In this study, the phase transition of CL-20 was observed using terahertz spectroscopy, and quantum chemical calculations were employed to analyze the vibrations. The results indicated changes in the vibrations of CL-20 before and after phase transition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yuefeng Gao, Sai Xu, Baojiu Chen
Summary: This study synthesized Cs2NaInCl6 nanocrystals co-doped with Sb3+ and Tb3+ ions as probes for copper ions detection in lubricating oil. The introduction of Sb3+ effectively reduced the band gap of the host material and enabled energy transfer pathway for Tb3+ emission. The doped Tb3+ ions resulted in the suppression of emission due to electron transfer. The Cs2NaInCl6: 2.5 %Sb3+, 40 %Tb3+ NCs exhibited superior sensitivity and selectivity for copper ions detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Yu Liu, Yue Zhang, Changyao Liu, Ce Wang, Baocai Xu, Li Zhao
Summary: A highly sensitive detection platform for heparin was developed using a cationic fluorescent dye (cresyl violet acetate) as a fluorescence probe. The platform demonstrated high selectivity towards heparin and achieved detection in both HEPES solution and serum.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Lopamudra Roy, Nivedita Pan, Susmita Mondal, Ria Ghosh, Md. Nur Hasan, Neha Bhattacharyya, Soumendra Singh, Kallol Bhattacharyya, Arpita Chattopadhyay, Samir Kumar Pal
Summary: The study focuses on the interaction between reactive oxygen species (ROS) and a spectroscopic probe called Rose Bengal (RB), encapsulated in nanoscopic sodium dodecyl sulphate (SDS) micelles and entrapped in microscopic nylon 66 solid matrix. The research demonstrates efficient interaction between ROS and RB-SDS, and investigates the mechanism of hydroxyl radicals generation. Based on these findings, a prototype device utilizing RB embedded in a nylon thin film for quantification of ROS in extracellular fluids and food materials was developed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Xiaosong Sun, Qihao Cui, Wenyue Dong, Qian Duan, Teng Fei
Summary: Conjugated porous polymers (CPPs) are promising sensing materials and their application in aqueous media is limited. In this study, we synthesized CPPs with porous structure and prepared nanoparticles, enabling efficient photoluminescence sensing of nitroaromatic explosives in aqueous phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Spectroscopy
Maria Cristina Caggiani, Germana Barone, Paolo Mazzoleni
Summary: Raman spectroscopy is commonly used for studying glassy materials in cultural heritage, but it is more difficult to interpret the spectra and apply the technique with portable instruments. In contrast, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) can be used in archaeometric investigations as it is portable and non-invasive. However, there is limited application of this technique to historical glasses. This exploratory work demonstrates the potential of DRIFTS, in combination with portable X-ray Fluorescence (pXRF) and EDS microanalyses, for studying the composition and alteration of glass samples in cultural heritage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)