Article
Chemistry, Applied
Jong-Chan Kim, Jungkyu Kim, Jinseok Park, Jung-Kwon Oh, In-Gyu Choi, Hyo Won Kwak
Summary: The study involved the preparation of chemically modified lignin and alginate hybrid adsorbents for efficient removal of cationic dyes. The encapsulation of carboxylated lignin into alginate beads resulted in higher methylene blue removal capacity due to the introduction of carboxylated anions. The Alg/C-Lig beads exhibited a high monolayer maximum adsorption capacity and stable adsorption efficiency even after multiple adsorption/desorption cycles, making them a promising candidate for dye wastewater purification.
REACTIVE & FUNCTIONAL POLYMERS
(2021)
Article
Polymer Science
Tao Chen, Haochen Liu, Jie Gao, Guowen Hu, Yuan Zhao, Xiuqin Tang, Xiaobing Han
Summary: Dye pollution is a serious issue in environmental protection. Bio-based adsorbents have gained attention for wastewater treatment due to their low cost, renewability, and environmentally friendly characteristics. This study fabricated bio-based SA/Lig hydrogel beads and investigated their adsorption properties for methylene blue (MB) removal. The results showed that the inclusion of lignin improved the thermal stability and adsorption performance of the composite material.
Article
Materials Science, Multidisciplinary
Zhi-Hao Zhang, Jia-Ying Xu, Xiao-Li Yang
Summary: Ti3C2Tx/SA beads were prepared for enhanced adsorption of methylene blue, showing efficient adsorption and superior reusability. The optimized Ti3C2Tx/SA-30% exhibited a maximum adsorption capacity of 92.17 mg/g at pH 7 and 298 K, maintaining an adsorption efficiency of 81.36% after three cycles. The adsorption process followed pseudo-second-order kinetics and Langmuir isotherm model.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Nader Marzban, Ahmad Moheb, Svitlana Filonenko, Seyyed Hossein Hosseini, Mohammad Javad Nouri, Judy A. Libra, Gianluigi Farru
Summary: This study investigated the removal of basic dye methylene blue by adsorption onto low-cost sodium alginate-kaolin beads. The research developed three models and used two intelligent modeling techniques to describe the adsorption as a function of operating parameters, finding that the artificial neural network (ANN) model was the best in predicting dye removal efficiency.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Environmental
Mengshuo Du, Youyu Cao, Xueli Luo, Weixia Yang, Wanmei Lin, Yingying Wang, Wenzhi Tang, Zhonghong Li
Summary: Metal-organic frameworks (MOFs) with high specific surface area, tunable pore size, flexible designability and favorable stability hold potential for removing heavy metal ions. In this study, a shapeable aerogel bead incorporated with L-cysteine-modified defective UiO-67 was designed for Pb(II), Cd(II) and Cu(II) adsorption. The modified UiO-67 showed increased surface area and mesoporous ratio, while the incorporation into sodium alginate aerogel beads enhanced recyclability and adsorption capacity. The main mechanisms for effective adsorption were chelation and ions exchange between functional groups and heavy metal ions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Tong Luo, Yanping Hao, Chao Wang, Weikun Jiang, Xingxiang Ji, Guihua Yang, Jiachuan Chen, Srinivas Janaswamy, Gaojin Lyu
Summary: Lignin nanoparticles (LNPs) prepared using deep eutectic solvent (DES) exhibit good stability and dispersibility in water, and show high efficiency in removing dyes from water.
Article
Biochemistry & Molecular Biology
Noor Ul Alamin, Amir Sada Khan, Asma Nasrullah, Jibran Iqbal, Zahoor Ullah, Israf Ud Din, Nawshad Muhammad, Shahan Zeb Khan
Summary: A cost-effective and sustainable activated carbon based on Calligonum polygonoides biomass was successfully synthesized and used in carbon-alginate beads for the adsorption of methylene blue dye. The fabricated beads demonstrated high adsorption capability and efficiency for the removal of cationic dyes from wastewater, even after recycling.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Physical
Xuesheng Liu, Xiangyu Zhao, Hong Meng, Junsu Jin
Summary: This work proposes a novel strategy for the photocatalytic degradation of target pollutants using core-shell dual metal-organic frameworks (MOFs) composites. The results demonstrate that the synthesized MIL-53@UiO-66 composites can effectively degrade tetracycline and methylene blue under specific degradation conditions. These composites, with strong adsorption and excellent stability, show great potential as catalysts for environmental remediation.
Article
Polymer Science
Jie Gao, Zhenzhen Li, Ziwen Wang, Tao Chen, Guowen Hu, Yuan Zhao, Xiaobing Han
Summary: Bio-based adsorbents were developed to remove dye contaminants for sustainable development. Aromatic bio-based tannin was incorporated into pure sodium alginate adsorbent to enhance its adsorption capacity. The Tan/SA composite hydrogel beads showed millimeter-sized beads with enhanced thermal stability. The 40% Tan/SA adsorbents achieved a maximum capacity of 247.2 mg/g at optimal conditions (pH = 12, T = 45 degrees C) with a removal efficiency of 82.4%. The adsorption process was endothermic and showed chemical adsorption, with a removal efficiency exceeding 90% after five cycles.
Article
Biochemistry & Molecular Biology
Zhenyu Jing, Yanhui Li, Qiuju Du, Xinxin Pi, Yuqi Wang, Shiyong Zhao, Yonghui Jin
Summary: A kind of magnetic ferric oxide/polyvinyl alcohol/calcium alginate/UiO-67 (Fe3O4/PVA/CA/UiO-67) nanospheres with homogeneous surface interconnecting structures were successfully prepared in this study. The properties and adsorption capability of the magnetic nanospheres for methylene blue (MB) were investigated. The results showed that the optimum adsorption temperature and pH for MB by the magnetic nanospheres were 298 K and 10, respectively, with a maximum removal of 1371.8 mg/g. The adsorption process followed a pseudo-first-order kinetic model and was confirmed to be exothermic and spontaneous. The interaction mechanism between MB and the magnetic nanospheres was determined to involve hydrogen bond, pi-pi bond, electrostatic interaction, and mesoporous pore flow.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Andreas Andreas, Zefanya Gerald Winata, Shella Permatasari Santoso, Artik Elisa Angkawijaya, Maria Yuliana, Felycia Edi Soetaredjo, Suryadi Ismadji, Hsien-Yi Hsu, Alchris Woo Go, Yi-Hsu Ju
Summary: Phytochemicals extracted from red cabbage were crosslinked with alginate to prepare biocomposite hydrogel beads (BHB), which showed good adsorption performance and were successfully applied for the adsorption of basic blue 9. Adsorption kinetics studies indicated that BHB was better fitted to the pseudo 1st order model.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Saerom Park, Jeong Woo Lee, Ji Eun Kim, Gwangnam Kang, Hyung Joo Kim, Yong-Keun Choi, Sang Hyun Lee
Summary: Alginate/biochar hydrogel beads were prepared and used for the removal of Cu2+ and benzene from wastewater. The results showed that the adsorption capacities for Cu2+ and benzene were improved with increasing alginate and biochar content. The adsorption behavior of the hydrogel beads was similar in the concurrent system compared to the single pollutant system. The kinetics and isotherm studies followed the pseudo-second-order model and Langmuir model. In addition, the hydrogel beads exhibited high reusability.
Article
Environmental Sciences
Muzdalfa Almas, Amir Sada Khan, Asma Nasrullah, Israf Ud Din, Taghreed M. Fagieh, Esraa M. Bakhsh, Kalsoom Akhtar, Sher Bahadar Khan, Shahan Zeb Khan, Abrar Inayat
Summary: Local clay-alginate beads loaded with sodium dodecyl sulfate (SDS) have been prepared and investigated as an effective adsorbent for methylene blue (MB) adsorption. The beads exhibit high adsorption efficiency and recyclability, making them a promising adsorbent for MB extraction.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Xin Zhang, Xiaoxian Hao, Shihui Qiu, Guangming Lu, Wenjing Liu, Libo Wang, Yongqi Wei, Bin Chen, Xijian Lan, Haichao Zhao
Summary: In this study, UiO-66-NH2@BIT-COOH nanocontainers were prepared for the stable release of antifoulants, exhibiting excellent antibacterial and anti-seaweed adhesion properties. The research provides guidance for the development of novel long-lasting antifouling coatings.\n
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Meriem Kasbaji, Mehdi Mennani, Nabil Grimi, Mustapha Oubenali, Mohamed Mbarki, Henri EL Zakhem, Amine Moubarik
Summary: This study describes the preparation of new eco-friendly adsorbents using a simple method. Gel beads of coffee grounds cellulose (CGC) and sodium alginate (SA) were synthesized and analyzed for their physicochemical properties, performances, and efficiency in wastewater treatment. The results showed that the beads had a high adsorption capacity and could effectively remove Methylene Blue (MB) and Congo Red (CR) contaminants. The adsorption processes were found to be favorable, spontaneous, and exothermic. The CGC/SA gel beads exhibited outstanding bio-adsorption capabilities, making them promising materials for adsorption applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Chemistry, Multidisciplinary
Yang Xu, Ahmed K. Rashwan, Ahmed Osman, Eman M. Abd El-Monaem, Ahmed M. Elgarahy, Abdelazeem S. Eltaweil, Mirna Omar, Yuting Li, Abul-Hamd E. Mehanni, Wei Chen, David W. Rooney
Summary: Metal-organic frameworks have various applications such as food packaging and drug delivery, but their use in food and pharmaceutical fields is limited due to toxicity concerns during preparation.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Applied
Abdelazeem S. Eltaweil, Eman M. Abd El-Monaem, Gehan M. El-Subruiti, Bassma M. Ali, Mona M. Abd El-Latif, Ahmed M. Omer
Summary: New porous adsorbent beads were developed by incorporating graphene oxide (GO) into cellulose acetate beads (CA) for the removal of methylene blue (MB) dye. The adsorption of MB dye increased with increasing GO ratio, following the PSO kinetic model and Langmuir isotherm model. The maximum adsorption capacity reached 369.85 mg/g. The adsorption mechanism involved electrostatic interactions, H-bonding, van der Waals forces, n-pi and pi-pi interactions. The beads exhibited excellent recycling ability and high selectivity towards MB molecules in the presence of co-existing cations.
JOURNAL OF POROUS MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Ahmed I. Osman, Eman M. Abd El-Monaem, Ahmed M. Elgarahy, Chukwunonso O. Aniagor, Mohamed Hosny, Mohamed Farghali, Emanne Rashad, Marcel I. Ejimofor, Eduardo A. Lopez-Maldonado, Ikko Ihara, Pow-Seng Yap, David W. Rooney, Abdelazeem S. Eltaweil
Summary: Access to drinkable water is increasingly challenging due to pollution and high cost of traditional water treatment methods. Biological sorbents made from biomass waste offer a promising and sustainable alternative. These sorbents effectively remove contaminants and promote circular economy. Different types of sorbents, preparation methods, adsorption mechanisms, and regeneration processes are discussed in this review.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Ahmed I. Osman, Mohamed Hosny, Abdelazeem S. Eltaweil, Sara Omar, Ahmed M. Elgarahy, Mohamed Farghali, Pow-Seng Yap, Yuan-Seng Wu, Saraswathi Nagandran, Kalaivani Batumalaie, Subash C. B. Gopinath, Oliver Dean John, Mahendran Sekar, Trideep Saikia, Puvanan Karunanithi, Mohd Hayrie Mohd Hatta, Kolajo Adedamola Akinyede
Summary: Microplastic pollution is a growing concern for human health as microplastics have been found in various ecosystems. This review discusses the sources, formation, occurrence, toxicity, and remediation methods of microplastics. It highlights the distinction between ocean-based and land-based sources, and the impact of microplastic exposure on human health and the aquatic ecosystem.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Ahmed I. Osman, Mohamed Farghali, Ikko Ihara, Ahmed M. Elgarahy, Amir Ayyad, Neha Mehta, Kim Hoong Ng, Eman M. Abd M. El-Monaem, Abdelazeem S. Eltaweil, Mohamed Hosny, Seham M. Hamed, Samer Fawzy, Pow-Seng Yap, David W. Rooney
Summary: Climate change necessitates the development of advanced carbon-neutral and circular methods for material and fuel production. This review focuses on the pyrolysis of algal and lignocellulosic biomass, analyzing the various products and mechanisms involved, as well as exploring techniques for upgrading the resulting oil. The economic viability and environmental impact of this process are also evaluated through life cycle assessments. The study finds that product yields are significantly influenced by the pyrolysis method and identifies key factors controlling the distribution of pyrolysis products. Furthermore, the potential of biochar in carbon dioxide sequestration and the economic feasibility of biochar and bio-oil generation are discussed.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Ahmed I. Osman, Ahmed M. Elgarahy, Abdelazeem S. Eltaweil, Eman M. Abd El-Monaem, Hisham G. El-Aqapa, Yuri Park, Yuhoon Hwang, Ali Ayati, Mohamed Farghali, Ikko Ihara, Ala'a H. Al-Muhtaseb, David W. Rooney, Pow-Seng Yap, Mika Sillanpaa
Summary: In response to the energy crisis and environmental pollution, research on efficient methods such as environmental catalysis for biofuel production and water purification has increased. Environmental catalysis involves the use of green catalysts to break down pollutants and produce chemicals without generating undesirable by-products. This review focuses on environmental photocatalysis, biocatalysis, and electrocatalysis, covering catalyst synthesis, structure, and applications. Biomass-derived materials, metal-organic frameworks, non-noble metals nanoparticles, nanocomposites, and enzymes are common catalysts. Water pollutants can be efficiently degraded using heterogeneous Fenton catalysis, with degradation rates ranging from 71.7% to 100%. Photocatalysis can produce dihydrogen (H-2) at a generation rate exceeding 100 μmol h(-1), while methane cracking yields dihydrogen ranging from 27% to 88%. Biodiesel production ranges from 48.6% to 99%.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Pharmacology & Pharmacy
Basma H. Naiel, Gehan M. El-Subruiti, Randa E. Khalifa, Abdelazeem S. Eltaweil, Ahmed M. Omer
Summary: New floatable polymeric beads were developed for efficient encapsulation and prolonged release of amoxicillin trihydrate. The beads were composed of alginate/iota carrageenan doubly networked polymeric beads, entrapped with sunflower oil, and surface-coated with aminated chitosan. Various analysis tools were employed to investigate the properties of the beads, which showed excellent floating ability exceeding 24 hours and successful encapsulation of 93.29% of the drug.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Abdelazeem S. Eltaweil, Maha S. Ahmed, Gehan M. El-Subruiti, Randa E. Khalifa, Ahmed M. Omer
Summary: New composite microbeads composed of carboxylated graphene oxide (CGO) impregnated into alginate (Alg) microbeads and coated with aminated chitosan (AmCs) layer were developed. The microbeads exhibited pH-sensitivity and the concentration of CGO and AmCs greatly influenced their swelling behavior and protection of Alg microbeads. The composite microbeads showed improved drug loading efficiency and sustained release of ciprofloxacin (CIP) compared to Alg microbeads.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Esther Eze, Ahmed M. Omer, Ahmed H. Hassanin, Abdelazeem S. Eltaweil, Mohamed E. El-Khouly
Summary: Converting agricultural waste into an effective adsorbent material for removing organic pollutants without creating secondary pollution has gained attention. In this study, eco-friendly composite beads were developed for the adsorption of methylene blue dye. The composite beads demonstrated a porous structure, negatively charged surface, and high adsorption capacity, making them a promising material for wastewater treatment.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Dhirar Ben Salem, Abdelkader Ouakouak, Fouzia Touahra, Noureddine Hamdi, Abdelazeem S. Eltaweil, Asad Syed, Ramaraj Boopathy, Hai Nguyen Tran
Summary: This study aimed to develop a new material, MBA-bead, by combining the properties of magnetic-biochar derived from peanut shells and hydrogel bead, and investigate its ability to adsorb Cu2+ in water. The MBA-bead contained a high water content of around 90% and had a diameter of approximately 3 mm (wet form) and 2 mm (dried form). It exhibited a specific surface area of 262.4 m(2)/g and a total pore volume of 0.751 cm(3)/g. The Langmuir maximum adsorption capacity of MBA-bead for Cu2+ was found to be 234.1 mg/g at 30 degrees C and pH(eq) 5.0. The primary adsorption mechanisms involved complexation, ion exchange, and Van der Waals force. Furthermore, the laden MBA-bead could be reused multiple times after desorbing with NaOH or HCl. The cost estimation for producing the materials indicated that MBA-bead has potential as an effective adsorbent for removing Cu2+ ions from water.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Applied
Ahmed M. Omer, Gehad S. Elgarhy, Gehan M. El-Subruiti, Eman M. Abd El-Monaem, Abdelazeem S. Eltaweil
Summary: Self-floating Ni-FeLDH@MWCNT@CA microbeads were prepared and showed strong adsorption ability for Cr6+. The adsorption occurred via electrostatic interactions, inner/outer sphere complexations, ion exchange, and reduction mechanisms. The microbeads also exhibited excellent reusability for five cycles.
CARBOHYDRATE POLYMERS
(2023)
Article
Environmental Sciences
Abdelazeem S. Eltaweil, Sara S. Bakr, Eman M. Abd El-Monaem, Gehan M. El-Subruiti
Summary: A promising Fenton-like catalyst, Fe3O4@ZIF-67/CuNiMn-LDH, was synthesized and modified from a novel flower-like CuNiMn-LDH, which exhibited remarkable degradation performance for Congo red (CR) utilizing H2O2 oxidant. The structural and morphological characteristics of Fe3O4@ZIF-67/CuNiMn-LDH were analyzed, and the catalyst showed considerable activity for the degradation of different dyes. Kinetic study indicated that the CR degradation followed a pseudo-first-order kinetic model, and the mechanism study proposed the dominance of the radical mechanism pathway.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Eman M. Abd El-Monaem, Abdelazeem S. Eltaweil, Gehan M. El-Subruiti, Mohamed S. Mohy-Eldin, Ahmed M. Omer
Summary: Water pollution is a serious problem that is continuously worsening, putting our planet at risk. The presence of persistent nitro aromatic compounds like nitrophenols causes concern due to their harmful effects, excessive usage, and difficulty in removal. To address this, a novel composite material was developed using kappa-Carrageenan, MOF (MIL-125(Ti)), and magnetic Fe3O4 for efficient adsorption of o-nitrophenol. The composite exhibited high surface area and magnetic property, and showed excellent adsorption performance. The adsorption mechanism involved hydrogen bonding, pi-pi interaction, and electron donor-acceptor interactions. The composite also demonstrated good reusability, making it a promising adsorbent for removing nitro aromatic pollutants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Eman M. Abd El-Monaem, Ahmed M. Omer, Abdelazeem S. Eltaweil
Summary: In this study, Fe/MOF-5@CTS composite film was successfully synthesized by doping a low amount of Fe/MOF-5 into the CTS film. The composite film exhibited excellent adsorption performance, especially for the removal of Congo red, with a maximum adsorption capacity of 219.78 mg/g.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Ahmed M. Omer, Tamer M. Tamer, Mohamed E. Hassan, Randa E. Khalifa, Eman M. Abd El-Monaem, Abdelazeem S. Eltaweil, Mohamed S. Mohy Eldin
Summary: The present study successfully developed an efficient superabsorbent hydrogel for water conservation and slow release of Ethephon. Through analysis and experiments, it was found that the grafted hydrogel made from modified cellulose and hydrophilic monomers has good water absorption capacity and nutrient carrying ability, which can be applied in agricultural production of sandy soil.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
