Article
Engineering, Environmental
Prashant Swapnil, Laishram Amarjit Singh, Chandan Mandal, Abhishek Sahoo, Farida Batool, Mukesh Meena, Pritee Kumari, Andleeb Harish, Andleeb Zehra
Summary: Nowadays, microorganisms are being utilized to remove various pollutants from wastewater, such as toxic metal ions. The challenges in coupling microbes with wastewater include the emergence of harmful elements, expensive microbial cultivation, and technical issues in industrial-scale production. Microbes serve as potential sorbents through suitable adsorption mechanisms. This review also highlights the use of photobioreactors based on microbial biofilm as an alternative technology for cost-effective biomass production in wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Environmental Sciences
Zhenming Zhang, Xianliang Wu, Huijuan Liu, Xianfei Huang, Qina Chen, Xuetao Guo, Jiachun Zhang
Summary: Microplastics (<5 mm) are widespread in the world and their presence in the environment raises concerns for health and safety. This review primarily focuses on the characterization techniques of microplastics and their interaction with conventional coexisting substances such as heavy metals, organic pollutants, and nutrients. It is observed that there is a significant pollution of microplastics in various areas, especially in Africa, Asia, India, South Africa, North America, and Europe. The separation methods and characterization technologies can accurately identify the shape, abundance, color, and particle size of microplastics. Additionally, the adsorption and desorption characteristics of heavy metals and organic pollutants on microplastics vary based on their properties.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Guangdou Qi, Zhifei Pan, Xueyang Zhang, Shuaishuai Chang, Hongbo Wang, Min Wang, Wei Xiang, Bin Gao
Summary: Microwave biochar produced with activated carbon catalyst shows excellent potential in removing heavy metals from waste water due to its high specific surface area and adsorption capacity. The optimum pH value for heavy metal removal is between 5-6, and Pb2+ exhibits the strongest affinity. The adsorption process is mainly explained by monolayer adsorption and chemical adsorption mechanisms. Complexation with oxygen-containing functional groups and precipitation with carbonate are the predominant adsorption mechanisms.
ENVIRONMENTAL RESEARCH
(2023)
Article
Polymer Science
Eva Oktavia Ningrum, Takehiko Gotoh, Wirawan Ciptonugroho, Achmad Dwitama Karisma, Elly Agustiani, Zela Marni Safitri, Muhammad Asyam Dzaky
Summary: Zwitterionic betaine polymers show potential as adsorbents for heavy metal ion removal, but intra- and/or inter-chain interactions can reduce their efficiency. Copolymerization of NIPAAM and DMAAPS was found to increase ion adsorption and weaken interactions between charged groups.
Article
Chemistry, Physical
Chen Wang, Lei Bi, Jingzhang Liu, Bang Huang, Fengbang Wang, Yichang Zhang, Chongchao Yao, Gang Pan, Maoyong Song
Summary: Metal sulfides are efficient scavengers for heavy metals, but their adsorption capacity is often lower than theoretical values. This study demonstrates the use of microalgae-derived carbon quantum dots (CQDs) as a green modifier to enhance the Cd(2+) removal capacity of nano-MnS/FeS.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Gargi Mistry, Kartik Popat, Jimit Patel, Kashish Panchal, Huu Hao Ngo, Muhammad Bilal, Sunita Varjani
Summary: Over the decades, water contamination has become a severe global issue due to the use of chemicals. Electro-deionization, as a new development in environmental engineering, combines traditional ion exchange and electrodialysis to address this problem. This review provides an overview of hazardous contaminants in water, their converted forms, and their risks to public health and the environment. It also outlines various electrochemical methods, particularly electrodeionization, for wastewater treatment and removal of hazardous contaminants, and discusses the challenges and future outlook for this field of research.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Analytical
Alex Pascual-Esco, Julian Alonso-Chamarro, Mar Puyol
Summary: A warning microanalyzer using Carbon Dots as selective optical reagents for the rapid monitoring of different heavy metals in water is presented. The system combines microfluidics with selective fluorescence quenching by heavy metal ions, providing sensitivity, automation, and reproducibility. It can also be used as a toxicity control system by selectively measuring heavy metal ions.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Inga Jurgelane, Janis Locs
Summary: Activated-carbon-containing pellets were prepared by direct chemical activation of sawdust with clays as a binder. The pellets were coated with hydroxyapatite nanoparticles to improve adsorption capacity for heavy metal ions. The adsorption process followed the pseudo-second-order kinetic model and the adsorption isotherm of Pb(II) fitted the Langmuir model. Desorption efficiency was improved by lowering the pH of the acid used, and the pellets could be regenerated through a desorption-rinsing-re-coating procedure. The regeneration process did not affect the adsorption of Pb(II) but reduced the compressive strength of the pellets.
Article
Environmental Sciences
Sujata Mandal, Jose Calderon, Sreekar B. Marpu, Mohammad A. Omary, Sheldon Q. Shi
Summary: In this study, an effective and environmentally friendly adsorbent, kenaf-based activated carbon (KAC), showed good adsorption capacity for heavy metals and dye in aqueous solution. The optimal pH for adsorption of metal ions and dye was found to be 6 and 4, respectively. The adsorption process followed pseudo-second-order kinetics and the adsorption efficiency improved with higher temperature. The KAC demonstrated stable adsorption performance even after 3 cycles of reuse.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Review
Environmental Sciences
Akshatha Hebbar, Raja Selvaraj, Ramesh Vinayagam, Thivaharan Varadavenkatesan, Ponnusamy Senthil Kumar, Pham Anh Duc, Gayathri Rangasamy
Summary: The discovery of carbon dots (CDs), zero-dimensional carbonaceous nanostructures, and their unique properties have attracted researchers' attention. Research on their synthesis, characterization, modification, and application in various fields has increased substantially. CDs have the potential for inexpensive and continuous monitoring, detection, and remediation of contaminants. Green chemistry principles prompt the exploration of novel nanoparticle synthesis methods. The utilization of CDs in photocatalysis allows for accelerated redox chemical transformations. This comprehensive review provides a broader perspective on CDs by discussing synthesis, characterization, applications in contaminant detection and photocatalysis, challenges, and potential areas for improvement.
Review
Chemistry, Multidisciplinary
Alejandro Lopez-Beltran, Claudia Iriarte-Mesa, Clarissa Murru, Frank J. Chao-Mujica, Angel Luis Corcho-Valdes, Lisandra Morales-Alvarez, Luis Felipe Desdin-Garcia, Johnny Deschamps, Manuel Antuch
Summary: The review summarizes the pollution caused by heavy metals through natural processes and human activities, and its occurrence in complex media. It aims to provide a systematic summary of the state-of-the-art fluorescent CDs and their sensing applications. The review also addresses the origin of observed selectivity in chemiluminescence sensors, offering explanations for trends and providing guidelines for the design of CDs targeting ions in solution.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Environmental Sciences
Suguna Perumal, Raji Atchudan, Periyasamy Thirukumaran, Dong Ho Yoon, Yong Rok Lee, In Woo Cheong
Summary: A novel adsorbent CGCDs was prepared and demonstrated efficient removal of heavy metal ions, especially in multiple metal ion systems.
Article
Environmental Sciences
R. Gayathri, K. P. Gopinath, P. Senthil Kumar
Summary: In this study, ultrasonic assisted jujube seeds (UAJS) treated with sulphuric acid were experimented as adsorbents for removing Zn(II) and Pb(II) contaminated water. Results show that UAJS has higher adsorption capacity and is effective in treating industrial wastewater containing metal ions.
Article
Environmental Sciences
Fatemeh Shahrezaei, Mohammad Bagher Gholivand, Mojtaba Shamsipur, Golshan Moradi, Nasrin Babajani, Ali Barati
Summary: This study discusses the application of a modified silanized fiberglass with carbon dots as an effective adsorbent for the removal of heavy metal ions from aqueous solutions. The adsorbent showed high removal efficiencies for lead, chromium, cadmium, cobalt, and nickel ions. The adsorption capacity for mixed metal ion solutions was lower compared to single metal solutions, but the selectivity for lead adsorption was higher. The adsorbent also showed good regeneration performance after multiple cycles and was successfully applied for the analysis of metal ions in water and wastewater samples.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Environmental Sciences
Banhisikha Debnath, Dibyajyoti Haldar, Mihir Kumar Purkait
Summary: Tea waste can be effectively used as adsorbents for the removal of pollutants from water, soil, and air, thus offering a sustainable solution for waste management and environmental remediation.
Correction
Materials Science, Multidisciplinary
Nur Liyana Mohamad Hafiz, Paridah Md Tahir, Lee Seng Hua, Zurina Zainal Abidin, Fatimah Athiyah Sabaruddin, Noryuziah Mohd Yunus, Ummi Hani Abdullah, H. P. S. Abdul Khalil
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Green & Sustainable Science & Technology
Jia Boh Tan, Nur Syakina Jamali, Wei En Tan, Hasfalina Che Man, Zurina Zainal Abidin
Summary: The study evaluated the techno-economic feasibility of an on-farm biogas system utilizing cow manure, demonstrating its ability to generate electricity and additional income for farmers.
Article
Environmental Sciences
Mohammed Abdullah Issa, Hamid Zentou, Zaid H. Jabbar, Zurina Z. Abidin, Haninah Harun, Noor Amirah Abdul Halim, Mohammed M. Alkhabet, Musa Y. Pudza
Summary: In this study, luminescent bio-adsorbent nitrogen-doped carbon dots (N-CDs) were synthesized and used for the removal and detection of Hg (II) from water. The N-CDs displayed excellent stability and adsorption capacity, and the optimal conditions for Hg (II) removal were determined. The research also analyzed the adsorption kinetics and found that N-CDs had a good selectivity for Hg (II).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Nur Haninah Harun, Zurina Zainal Abidin, Umar Adam Majid, Mohamad Rezi Abdul Hamid, Abdul Halim Abdullah, Rizafizah Othaman, Mohd Yusof Harun
Summary: This study optimized the removal of Cu(II) ions using a Jatropha oil bio-based membrane blended with graphene oxide. The central composite model and response surface methodology were utilized for the optimization. The results demonstrated a high Cu(II) ions removal rate, and the reduced model showed good predictive ability.
Article
Water Resources
Hilmi S. Salem, Musa Yahaya Pudza, Yohannes Yihdego
Summary: This article discusses the interconnections between water, energy, and food, known as the WEF Nexus. It also considers the impacts of population growth, environmental changes, climate adaptation, and sustainability on the WEF Nexus. The paper suggests that the Nexus approach can promote sustainable development and protect natural resources and the environment.
SUSTAINABLE WATER RESOURCES MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Mohammed M. Alkhabet, Saad H. Girei, Husam K. Salih, Rasha Thabit, Mohammed Abdullah Issa, Suriati Paiman, Norhana Arsad, Mohammed Thamer Alresheedi, Mohd A. Mahdi, Mohd H. Yaacob
Summary: This study describes the development of a palladium-coated optical fiber for room temperature hydrogen gas detection. The sensor exhibits high sensitivity, good selectivity, and operates reliably at room temperature. The results demonstrate that this simple and cost-effective method enables reliable and efficient detection of hydrogen gas.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Zaid H. Jabbar, Bassim H. Graimed, Mohammed Abdullah Issa, Saad H. Ammar, Shahlaa Esmail Ebrahim, Hussein J. Khadim, Ayah A. Okab
Summary: In this study, magnet silica-coated Ag2WO4/Ag2S nanocomposites (FOSOAWAS) were fabricated to address the drawbacks of single photocatalysts and clarify the influence of semiconductor heterojunction on visible-light-driven organic degradation. The results showed that the heterojunction between Ag2WO4 and Ag2S improved the efficiency of electron/hole pair separation and reduced recombination, leading to enhanced photodegradation efficiency. The FOSOAWAS photocatalyst also exhibited excellent stability and facile separation.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Zaid H. Jabbar, Ayah A. Okab, Bassim H. Graimed, Mohammed Abdullah Issa, Saad H. Ammar
Summary: A novel S-scheme g-C3N4/Ag2WO4/Bi2S3 heterojunction was successfully fabricated and characterized using XRD, XPS, HRTEM, DRS, photocurrent, EIS, and PL spectra. The g-C3N4 support played a vital role in improving the surface characteristics of the heterojunction and enhancing its optical and photoelectrochemical properties. The ternary photocatalyst CN/AW/BS exhibited superior degradation performance for Congo red compared to individual components or the heterojunction, and the environmental parameters were also evaluated. The dual-S-scheme electron pathway and Congo red degradation pathways were elucidated.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Zaid H. Jabbar, Ayah A. Okab, Bassim H. Graimed, Mohammed Abdullah Issa, Saad H. Ammar
Summary: In this study, a heterojunction of graphitic carbon nitride (g-C3N4) immobilized Bi2S3/Ag2WO4 (BS/AW/CN) was successfully fabricated. The nanomaterials were characterized and showed the existence of g-C3N4 nano-sheets loaded with Ag2WO4 and Bi2S3. The BS/AW/CN nanocomposite exhibited improved surface area and enhanced photoelectrochemical properties. The heterojunction displayed excellent light absorption ability and demonstrated superior photocatalytic antimicrobial activity against Staphylococcus aureus cells in wastewater treatment systems. The findings suggest the potential applicability of this visible-light responsive photocatalyst for disinfection purposes.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Bassim H. Graimed, Ayah A. Okab, Zaid H. Jabbar, Mohammed Abdullah Issa, Saad H. Ammar
Summary: A novel mesoporous SiO2/beta-Bi2O3/Ag plasmonic heterojunction was successfully fabricated for ciprofloxacin (CIP) degradation in wastewater. The ternary SiO2/beta-Bi2O3/Ag photocatalyst showed high efficiency with 96% CIP degradation and 65% TOC removal in 105 min under LED irradiation. The use of SiO2/beta-Bi2O3/Ag nanocomposite significantly improved the degradation rate compared to other catalysts.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Astronomy & Astrophysics
Z. Z. Abidin, A. N. Zulkiplee, V. Epin, F. A. M. Pauzi
Summary: This paper reports a detailed observation of a Type II solar radio burst on November 3, 2010. Data from multiple sources are analyzed, including the Space Weather Prediction Center, National Oceanic and Atmospheric Administration, e-CALLISTO, and Nancay RadioHeliograph. The brightness temperature and degree of circular polarization of the herringbone burst are determined, and correlations between the physical parameters and the herringbone are examined. Based on these findings, it is suggested that this herringbone was generated through fundamental plasma.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Nor Faeqah Idrus, Robiah Yunus, Zurina Zainal Abidin
Summary: The miscibility and solubility between refrigerant and lubricant play a crucial role in the operation of a refrigeration system. Polyol esters, such as pentaerythritol (PE) esters, are considered to have good miscibility with refrigerants and are used as biolubricants in hydrofluorocarbons (HFCs) refrigerant systems due to their high viscosity. However, the PE ester in this study was found to be partially miscible with HFC R134a refrigerant and required the addition of a suitable surfactant to improve its miscibility and solubility.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Engineering, Environmental
Jamila El Gaayda, Fatima Ezzahra Titchou, Issam Barra, Ilham Karmal, Hanane Afanga, Hicham Zazou, Pow-Seng Yap, Zurina Zainal Abidin, Mohamed Hamdani, Rachid Ait Akbour
Summary: This study evaluated the efficiency of Moringa oleifera seed powder (MOSP) as a natural coagulant for removing turbidity and anionic dye from synthetic wastewater. The results showed that MOSP had a high removal efficiency for both turbidity and dye, and could be considered as an alternative to chemical coagulants due to its environmental friendliness.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
