Article
Green & Sustainable Science & Technology
Yaoyao Huang, Yuyang Wu, Wei Ding, Qiang Sun, Chao Hu, Bingzhi Liu, Hongxia Liu, Huaili Zheng
Summary: In this study, chitosan-coated magnetic silica nanoparticles were prepared and used for selective removal of silver ions from complex wastewater. These nanoparticles showed excellent selective adsorption performance in a wide pH range and maintained high adsorption capacity even in the presence of dyes. The adsorption process was chemisorption-controlled and exhibited a synergistic adsorption effect in the dye-metal binary system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biochemistry & Molecular Biology
Shuai Wang, Hao Wang, Jiali Tang, Yingbi Chen, Shixing Wang, Libo Zhang
Summary: The novel chitosan-based adsorbent CS-DPDM shows promising adsorption performance for Au(III) and has broad application prospects in recovering gold ions from aqueous solutions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biochemistry & Molecular Biology
Azhar Ahmad, Prashun Ghosh Roy, Shuiqin Zhou, Ahmad Irfan, Farah Kanwal, Robina Begum, Zahoor H. Farooqi
Summary: Chitosan based monodisperse poly[chitosan-N-isopropylmethacrylamide-acrylic acid] [P(CNA)] microgels were synthesized and used as micro-reactors to prepare Ag-P(CNA) hybrid microgels via chemical reduction of Ag+ ions. The resulting hybrid microgels were characterized by TEM, FTIR spectroscopy, and UV-vis spectroscopy. The catalytic potential of the Ag-P(CNA) hybrid system for the reduction of nitroarenes was evaluated using sodium borohydride as a reductant in aqueous medium. The Ag-P(CNA) hybrid microgel system exhibited stable, economical, and efficient catalytic activity for the rapid reduction of nitroarenes both individually and simultaneously.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Nooraddein A. Ekrayem, Almahdi A. Alhwaige, Wael Elhrari, Mohamed Amer
Summary: The study developed eco-friendly polymeric spheres derived from crosslinking of chitosan (CTS) with different polyesters. The spheres showed enhanced structure and stability in aqueous media, with decreased hydrophilicity, and were effective in adsorbing lead ions (Pb2+) from aqueous solutions. The experimental data was fitted well with the Freundlich isotherm model, showing the best fit for the adsorption process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Biochemistry & Molecular Biology
Mingyang Jiang, Raed H. Althomali, Shakeel Ahmed Ansari, Ebraheem Abdu Musad Saleh, Jitendra Gupta, Khusan Djakhongirovich Kambarov, Hashem O. Alsaab, Enas R. Alwaily, Beneen M. Hussien, Yasser Fakri Mustafa, Asghar Narmani, Bagher Farhood
Summary: Traditional approaches like chemotherapy and radiotherapy have shown limited efficacy in the diagnosis and treatment of diseases, leading to the exploration of potential novel approaches. Biomaterials such as chitosan nanoparticles have gained attention for their properties and have been approved by the FDA for pharmaceutical applications. Combining chitosan with metallic nanoparticles could further enhance the diagnosis and treatment of diseases.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Minghu Zhao, Xiteng Li, Zhen Huang, Shixing Wang, Libo Zhang
Summary: The recovery of gold from wastewater has attracted significant attention due to its high economic value and low availability. A novel chitosan-based adsorbent, CS-GTU, showed excellent selective adsorption capacity for Au(III) from aqueous solutions. The adsorbent demonstrated outstanding regenerability and efficient adsorption for Au(III), making it a suitable and efficient option for gold ion removal in water solutions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
Shehdeh Jodeh, Mahmoud Shawahny, Ghadir Hanbali, Diana Jodeh, Omar Dagdag
Summary: This study utilized a synthesized cross-linked magnetic chitosan with graphene oxide beads for the removal of perchlorate from wastewater, showing that adsorption can occur over a wide range of pH and follows a pseudo-second-order kinetic model and Langmuir adsorption isotherm. The findings suggest that the adsorption process is exothermic and spontaneous, with the perchlorate adsorbent effectively regenerated by a 0.1% NaCl solution.
ENVIRONMENTAL TECHNOLOGY
(2021)
Article
Engineering, Chemical
Dmitriy Berillo, Aknazar Arysbek
Summary: This study demonstrates the effective removal of silver nanoparticles (AgNPs) using a chitosan-based cryogel, which has potential applications in agriculture, water treatment, and industrial plants. The adsorbent is economically viable, has high affinity toward metal nanoparticles, is biodegradable and biocompatible, and displays good removal efficiency of nanoparticles.
Review
Chemistry, Applied
Siu Hua Chang
Summary: This paper provides an overview of Au(III) recovery from aqueous solutions using raw and modified chitosan, focusing on their synthesis, characteristics, modifications, sorption properties, and comparison between the two. The challenges and future prospects of using modified chitosan in large-scale applications for Au(III) recovery from aqueous solutions are also addressed.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Zaheer Khan, Shaeel Ahmad AL-Thabaiti
Summary: Chitosan capped silver nanoparticles were synthesized and investigated for cadmium removal. The results showed that chitosan exhibited high adsorption capacity and intensity for cadmium, and the adsorption process followed a pseudo-second-order kinetic model. Furthermore, the usage of sodium borohydride and silver nitrate influenced the properties of silver nanoparticles.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Lina Yu, Jie Bi, Yu Song, Mingqing Wang
Summary: In this study, the magnetic resin of chitosan microspheres was successfully used to remove toxic dyestuffs, specifically methyl orange, from a solution. The results showed that the adsorption capacity of the resin was highest at pH 5 and an initial concentration of 450 mg/L. Langmuir isotherm model provided the best fit for the adsorption process. The findings suggest that the chitosan microspheres resin is a promising and environmentally friendly sorbent for the removal of methyl orange.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Polymer Science
Jorge Lozano-Montante, Raquel Garza-Hernandez, Mario Sanchez, Edgar Moran-Palacio, Guillermo Nino-Medina, Mario Almada, Luis Hernandez-Garcia
Summary: This study successfully achieved the adsorption of Pb(II) ions in water by cellulose derivatives, and identified that cellulose composite materials cross-linked with chitosan modified with 2-methylpyridine and succinic anhydride have higher adsorption capacities. Kinetic data showed a pseudo-second-order behavior in the adsorption process.
Article
Chemistry, Applied
Ravneet Kaur, Dinesh Goyal, Shekhar Agnihotri
Summary: The study fabricated a chitosan-Polyvinyl alcohol hydrogel nanocomposite incorporated with silver nanoparticles for the removal of herbicide butachlor from aqueous solution. The nanocomposite showed improved adsorption of butachlor at 30 degrees C and pH 3.0, following a monolayer adsorption mechanism as confirmed by Langmuir and Freundlich models.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Minyao Liu, Zhengfeng Xie, Hao Ye, Wei Li, Wei Shi, Yucheng Liu
Summary: The novel magnetic cross-linked chitosan CS-BA@Fe3O4 exhibits excellent adsorption performance with main mechanisms of hydrogen bonding and electrostatic interaction. It also shows good stability and regenerative properties in various harsh environments, indicating a promising application prospect in water remediation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Electrochemistry
W. Sanchez-Ortiz, J. Aldana-Gonzalez, Tu Le Manh, M. Romero-Romo, I. Mejia-Caballero, M. T. Ramirez-Silva, E. M. Arce-Estrada, V. Mugica-Alvarez, M. Palomar-Pardave
Summary: This study demonstrates for the first time that a deep eutectic solvent formed by acetylcholine chloride and urea can be successfully used for silver recovery from spent silver oxide batteries. The DES functions as a selective leaching liquor and an electrolytic bath for silver electrodeposition, providing valuable practical information on the diffusion coefficient of Ag(I) ions in this media. Additionally, the study reveals the occurrence of multiple 3D nucleation with diffusion-controlled growth during silver electrodeposition in this DES.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Ahmed Yousif, Adel El-Afandy, Galal Dabbour, Amal E. Mubark
Summary: In this study, modified cellulose bearing iminoacetate functionality was prepared and characterized. The modified cellulose showed high adsorption capacity for V(IV) ions and achieved selective separation from U(VI) ions.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Abdullah Akhdhar, Deia Abd El-Hady, Mohammed Almutairi, Khulood K. Alnabati, Abdullah Alowaifeer, Sultan Alhayyani, Hassan M. Albishri, Abdullah S. Al-Bogami
Summary: The study found that polyethylene laminated disposable paper cups may contain metals and ions in hot water, although the concentrations are below drinking water standards. Specifically, vanadium and fluoride ions may pose health risks after long-term ingestion. Adjustments in cup composition are needed to avoid the release of contaminants.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Environmental Sciences
A. M. Salama, R. M. A. Abedin, K. Z. Elwakeel
Summary: The study evaluated the role of greenly prepared magnetic iron oxide nanoparticles (Fe3O4 NPs) on bioremediation of dairy effluent, finding that Fe3O4 NPs enhance bacterial growth, with an optimum concentration of around 40 mg L-1. Cultures incorporating Fe3O4 NPs showed significant improvement in bioremediation compared to pure cultures.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Mohammed F. Hamza, Yuezhou Wei, Mahmoud S. Khalafalla, Neveen S. Abed, Amr Fouda, Khalid Z. Elwakeel, Eric Guibal, Nora A. Hamad
Summary: Urea and thiourea have been deposited on the surface of silica beads for the recovery of U(VI) and Th(IV). The sorbents exhibit fast uptake kinetics and high sorption capacities. They also show excellent stability and preferential adsorption of U(VI) and Th(IV) over other metals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ahmed M. Elgarahy, Bandar A. Al-Mur, Abdullah Akhdhar, Hamdy A. El-Sadik, Mohamed Azab El-Liethy, Khalid Z. Elwakeel, Abeer M. Salama
Summary: This study successfully isolated three bacterial species with potential as multifunctional biosorbents from low-level liquid radioactive wastes. These bacteria exhibited high loading capacities for cerium and cobalt metal ions, making them promising for the removal of toxic heavy metals from liquid waste effluents.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Ahmed M. Elgarahy, M. G. Eloffy, Ahmed Alengebawy, Dina M. El-Sherif, Mohamed S. Gaballah, Khalid Z. Elwakeel, Mohamed El-Qelish
Summary: Food waste contains various nutrients that can be reused to produce value-added products or converted into green energy sources, such as biogas, biohydrogen, and biodiesel, as an alternative to nonrenewable fuels. Laboratory studies have shown that biochemical production using food waste is as effective as using pure carbon sources. This review article aims to provide a global perspective on the approaches used to turn food waste into usable products and green energy sources. It discusses the sources, types, impacts, characteristics, pre-treatment strategies, and potential management of food waste for value-added product generation. The reviewed articles also highlight the feasibility of energy recovery from food waste through various transformation processes, as well as the socioeconomic, environmental, and engineering aspects related to food waste management.
ENVIRONMENTAL RESEARCH
(2023)
Review
Engineering, Chemical
Ahmed M. Elgarahy, M. G. Eloffy, Eric Guibal, Huda M. Alghamdi, Khalid Z. Elwakeel
Summary: Polymeric materials have thrived globally due to their versatility and durability, but the reliance on petroleum-based polymers has led to environmental issues. Natural biopolymers from biomass offer a promising solution to replace petroleum-based polymers, with advantages of low cost, environmental friendliness, and user-friendliness. The use of biopolymers is crucial in promoting a circular bioeconomy, and future environmental management and planning.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Jilda Sofiana Buhani, Jilda Sofiana Dewi, Nadya Syarifatul Fajriyah, Mita Z. Rilyanti, Suharso, Sumadi, Khalid Elwakeel
Summary: This study modified carbon derived from rubber fruit shells, resulting in nAC-RFs-S through the use of a silane agent called 3-Aminopropyl-Triethoxysilane (APTES). The adsorbent was characterized using Infrared Spectrometer (IR) and Scanning Electron Microscopy-Energy Dispersive-X-ray (SEM-EDX). Batch adsorption experiments showed that nAC-RFs-S had optimal conditions for adsorbing Coomassie Brilliant Blue (CBB) and Methylene Blue (MB) dyes. The nAC-RFs-S adsorbent demonstrated remarkable effectiveness in adsorbing CBB and MB in solution, with the ability to be reused for multiple cycles.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
Mita Buhani, Franciska Devi Rindi Suharso, Mita Rilyanti, Franciska Devi Rindi Antika, Laili Puji Z. Lestari, Sumadi, Muslim Ansori, Khalid Elwakeel
Summary: In this research, activated carbon obtained from rubber fruit shells (ACRPs) was modified with magnetite coating and silanization with triethoxyiphenylsilane (TEPS) to produce a new magnetic adsorbent (ACRPs-MS). The adsorption capacity and kinetics of the ACRPs-MS adsorbent were evaluated for methylene blue (MB) and crystal violet (CV) dyes in mono-component and bi-component solutions. The results showed that ACRPs-MS exhibited strong affinity towards both dyes and followed pseudo-second-order kinetics. The adsorbent could be reused multiple times and desorption was successfully achieved using 0.05 M HCl solution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Buhani, Istikomah, Suharso, Sumadi, Sutarto, Huda M. Alghamdi, Khalid Z. Elwakeel
Summary: The modification of Tetraselmis sp. algae material with surfactant CTAB resulted in an effective adsorbent for the removal of anionic dyes from wastewater. The adsorption process followed pseudo-second-order kinetics and Freundlich adsorption isotherms. The reuse of the adsorbent showed high adsorption capacity even after multiple cycles.
Article
Engineering, Environmental
M. G. Eloffy, Ahmed M. Elgarahy, Ayman N. Saber, Ahmed Hammad, Dina M. El-Sherif, Moustafa Shehata, Ahmed Mohsen, Khalid Z. Elwakeel
Summary: This review article summarizes patented approaches for hydrogen production from biomass, discusses the optimization of different prominent parameters to achieve the easiest way for hydrogen production, and briefly addresses operational parameters, technical challenges, and scalable improvement of each pathway.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
Review
Materials Science, Multidisciplinary
Raed A. Mashabi, Ziya A. Khan, Khalid Z. Elwakeel
Summary: This study summarizes the use of chitosan (CS) or glycidyl methacrylate (GMA) as dye adsorbents and their modifications using different functional materials. It is found that CS and GMA derivatives have good water-purification properties and can effectively clean wastewater. Thorough knowledge of their adsorption capabilities is required for understanding how CS and GMA remove organic dyes from wastewater.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Analytical
A. H. El-Afandy, A. M. Yousif, A. E. Mubark
Summary: In this study, attaclastic rocks from the Abu Rusheid area in the Southeastern Desert of Egypt were physically upgraded to obtain a concentrate containing zirconium, niobium, rare earth elements, uranium, and thorium. The novelty of the procedure lies in the selective separation of niobium and the subsequent recovery of other elements from the residue. The obtained products were significant.
Article
Chemistry, Multidisciplinary
A. M. Yousif, E. S. Gad
Summary: In this study, psyllium-based polymeric networks were synthesized using microwave irradiation, and exhibited excellent adsorption performance for removing Hg (II) ions. The sorbent showed high removal efficiencies for heavy metal ions in real industrial wastewater samples.
EGYPTIAN JOURNAL OF CHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
Galal M. Abdel Wahab, Walid M. Abdellah, Ahmed M. Yousif, Amal E. Mubark
Summary: This study focused on selectively dissolving niobium from Gabal El Faliq concentrate sample using a fluoride-free process. A high amount of ZrO2, Nb2O5, Re2O3, and HfO2 were present in the concentrate sample, and various economic minerals were found. By optimizing the conditions, approximately 98% of niobium content was selectively dissolved, and pure Nb2O5 with a purity of 98.95% was obtained using an organic solvent extraction process.
MINING METALLURGY & EXPLORATION
(2022)
