Article
Environmental Sciences
Chitiphon Chuaicham, Karthikeyan Sekar, Vellaichamy Balakumar, Junya Uchida, Takumi Katsurao, Hiroshi Sakabe, Bunsho Ohtani
Summary: The use of BiOBr/carbon quantum dot/saponite composites in photocatalytic wastewater remediation was investigated in this study. The results showed that the strong adhesion between CQDs and clay in the composites improved the interaction between BiOBr and CQDs, leading to enhanced photocatalytic performance. The optimized CQDs/Clay@BiOBr composite exhibited a faster degradation rate and better separation and transportation of photogenerated electrons and holes. The proposed composite has potential application as a visible-light-driven photocatalyst for organic contaminant decomposition in wastewater.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Huihui Feng, Yan Zhang, Fengling Cui
Summary: Cuprous oxide (Cu2O), a p-type semiconductor material, has been found to play a significant role in photocatalysis, and enhancing its photocatalytic activity can be effectively achieved by introducing CQDs, leading to improved degradation of methylene blue and antibacterial activity against Escherichia coli.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Jaykishon Swain, Anulipsa Priyadarshini, Sugato Hajra, Swati Panda, Jagannath Panda, Raghabendra Samantaray, Yusuke Yamauchi, Minsu Han, Hoe Joon Kim, Rojalin Sahu
Summary: In this study, BaTiO3 nanoparticles are loaded into a Zeolitic Imidazolate Framework (ZIF-8) to create BaTiO3 @ZIF-8 nanocomposites for the photocatalytic degradation of dyes in wastewater. The results demonstrate that the composite efficiently degrades dyes under solar irradiation and exhibits excellent performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Chemical
Saeed Safa, Mostafa Khajeh, Ali Reza Oveisi, Rouhollal Azimirad, Hamid Salehzadeh
Summary: Plasma treatment of NW-PP proved to be the most effective strategy for achieving uniform distribution of MOF and improved filtering performance, while the addition of graphene quantum dots enhanced photocatalytic performance by inhibiting recombination of electron/hole pairs.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Sohel Das, Prathap Somu, Subhankar Paul
Summary: This study investigated the degradation of the azo dye Congo red (CR) under sunlight using a nanoconjugate of graphene oxide (nGO) and CdSe quantum dots (QD) as a nano-photocatalyst. The synthesized catalyst showed high efficiency at pH 7.0 and a degradation efficiency of over 90% within 60 minutes for 20 ppm and 100 ppm dye concentrations. The nanoconjugate exhibited high reusability and non-toxicity of photo-degraded by-products, making it a promising nano material for rapid degradation of CR dye.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Nanoscience & Nanotechnology
Shivendra Singh, Chethana Rao, Chayan K. Nandi, Tushar Kanti Mukherjee
Summary: The utilization of quantum dot-embedded nanodroplets as photocatalytic nanoreactors enables efficient chemical transformations, which are less effective when using bare quantum dots in bulk aqueous solution. These nanodroplets exhibit excellent recyclability, with no significant decrease in conversion yield and reaction kinetics. The observed photocatalytic activity is attributed to the surface charge modulation of embedded quantum dots and the nanoconfinement effect inside the nanoreactor.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Nabilah Saafie, Nonni Soraya Sambudi, Mohd Dzul Hakim Wirzal, Suriati Sufian
Summary: In this study, kenaf-based carbon quantum dots (CQD) were successfully synthesized via hydrothermal synthesis. The optimal conditions for the synthesis were found to be 200 degrees C, 0.5 g and 24 h, resulting in well-defined and well-distributed CQDs with an optimized particle size of 8.1 +/- 2.2 nm. The C200-0.5-24 exhibited a higher photocatalytic activity for methylene blue degradation, with a removal rate of 90% within 120 min.
Article
Chemistry, Inorganic & Nuclear
Vasundhara Madaan, Brij Mohan, Vinita Bhankar, Rohit Ranga, Parveen Kumari, Permender Singh, Mika Sillanpaa, Ashok Kumar, Alexander A. Solovev, Krishan Kumar
Summary: Metal-doped CeO2-based nanomaterials show promising applications in the photocatalytic degradation of organic waste in water. The unique properties of metal-doped CeO2, such as its characteristic bandgap, oxygen vacancies, and surface-active cationic sites, play an important role in organic waste degradation. The synthesis routes and conditions, reaction temperature, concentration, nature and annealing temperature of the doping ions, and surface morphology also affect the photocatalytic degradation process. Challenges and prospects for the development of metal-doped CeO2 as a photocatalyst with precise morphology and synthesis routes are discussed.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Kamran Khan, Khadijah Mohammedsaleh Katubi, Zahida Batool, Norah Salem Alsaiari, Sumaira Manzoor, Salma Aman, Alishba Fatima, M. S. Al-Buriahi, Muhammad Naeem Ashiq
Summary: Water pollution caused by dyes is a major concern worldwide as purified water is essential for survival. A composite material composed of carbon dots and SrBaZn1.25Mn0.75Fe10.5Zr0.75Ni0.75O22 has been developed to degrade methylene blue under visible light. The composite material showed excellent photocatalytic activity and stability, making it a promising solution for water remediation.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Khemchand Dewangan, Dadan Singh, Nilesh Satpute, Ritika Singh, Adhish Jaiswal, Kamlesh Shrivas, Indra Bahadur
Summary: This study reported the adsorption and photodegradation efficiency of alpha-MoO3 microfibers towards methylene blue dye. High-quality alpha-MoO3 microfibers were obtained through a hydrothermal treatment method, and the growth mechanism of the microfibers was explained. The experimental results demonstrated that alpha-MoO3 microfibers exhibited excellent photocatalytic properties for the degradation and removal of organic pollutants in water.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Physics, Multidisciplinary
Aayush Gupta, Sachin Jaidka, Pandey Rajagopalan, Hitesh Kumar Mehtani, Varun Singhal, O. P. Pandey
Summary: Recent developments in 2D nanomaterials have shown that graphitic carbon nitride (g-C3N4) has a wide range of applications due to its electrical conductivity, sensing and luminescence abilities, biocompatibility, and chemical stability. This study demonstrates the effectiveness of g-C3N4 as a photocatalyst for removing various organic molecules from water and its potential use in dielectric applications when combined with an organic polymer (polyvinylidene fluoride; PVDF). The research also examines the properties of the g-C3N4 and PVDF-g-C3N4 composite film, including its structure, chemical composition, and photocatalytic degradation capabilities.
Article
Chemistry, Physical
Sivakumar Bose, Muthuchamy Maruthupandy, Wan-Seob Cho, Hyun Wook Kang
Summary: This study synthesized CuxFeSx derivatives using different solvents and investigated their photocatalytic activity towards Direct Red 80 (DR-80) and safety in human cell lines. The results showed that CuxFeSx-Et exhibited the highest photocatalytic efficiency and recyclability, and it was non-toxic to human cell lines. This study provides new insights into the benign-by-design of CuxFeSx as photocatalysts for dye degradation.
SURFACES AND INTERFACES
(2023)
Review
Chemistry, Inorganic & Nuclear
Muhammad Farooque Lanjwani, Mustafa Tuzen, Muhammad Yar Khuhawar, Tawfik A. Saleh
Summary: The development of the textile industry has raised concerns due to the contamination of drinking water by organic dyes, which pose a carcinogenic risk to humans. Nanomaterials, particularly semiconductors, have been utilized for photocatalytic degradation of dye pollutants. Various parameters, such as catalyst dosage, irradiation time, light sources, initial dye concentration, temperature, and pH, play significant roles in the degradation process. Different generations of photocatalytic nanomaterials, including single metal nanoparticles, binary and ternary metal oxides, as well as inert solid substrates with photocatalysts, have been employed for dye degradation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2024)
Article
Environmental Sciences
Amruta Ponkshe, Pragati Thakur
Summary: This study demonstrated the improved solar light-driven photocatalytic degradation and mineralization of two emerging pollutants and recalcitrant beta blockers propranolol and atenolol using a metal-free carbon dot/TiO2 composite. The optimized composite showed enhanced degradation and mineralization efficiency, along with successful reusability, attributed to the excellent photosensitizer and electron reservoir properties of the carbon dot, as well as upconverted photoluminescence behavior.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Ying Wang, Kewang Zhang, Yukou Du
Summary: This article provides a comprehensive overview of the application of carbon dots (CDs) in the detection of tetracyclines (TCs). The authors introduce the characteristics of TCs and CDs, classify the synthetic methods of CDs based on different technologies and doped species, and highlight the remaining defects and prospects. This review offers valuable guidance for the wide application of CDs and the detection of TCs.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Environmental Sciences
A. Suhaimi, E. Mahmoudi, K. S. Siow, A. W. Mohammad, M. F. Mohd Razip Wee
Summary: Surface modification of PES membrane using plasma polymerization with heptylamine as the precursor significantly improves permeate flux, rejection, and fouling properties, showing great potential compared to untreated commercial filtration membranes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Psychiatry
Ebrahim Mahmoudi, Joshua R. Atkins, Yann Quide, William R. Reay, Heath M. Cairns, Chantel Fitzsimmons, Vaughan J. Carr, Melissa J. Green, Murray J. Cairns
Summary: Studies have shown that the MIR137 4-repeat VNTR (VNTR4) variant is enriched in a cognitive deficit subtype of schizophrenia and is associated with altered brain morphology, potentially impacting the expression of more severe cognitive symptoms in patients.
SCHIZOPHRENIA BULLETIN
(2021)
Review
Energy & Fuels
Nor Naimah Rosyadah Ahmad, Choe Peng Leo, Abdul Wahab Mohammad, Norazuwana Shaari, Wei Lun Ang
Summary: This paper introduces the potential of ionic liquid in CO2 capture applications and its combination with membrane technology, focusing on the latest advances in ionic liquid-based mixed matrix membranes and their influencing factors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Genetics & Heredity
Ebrahim Mahmoudi, Melissa J. Green, Murray J. Cairns
Summary: This study identified 8762 high confidence circRNAs with systematic alternative splicing in human PBMCs. The dysregulation of circRNAs in schizophrenia and bipolar disorder was observed, with 55 circRNAs showing significant downregulation. These DE circRNAs were predicted to interact with miRNAs targeting genes enriched in psychiatric disorders, suggesting their potential as biomarkers in psychiatry.
JOURNAL OF MOLECULAR MEDICINE-JMM
(2021)
Article
Engineering, Environmental
Siti Nur Hatika Abu Bakar, Hassimi Abu Hasan, Abdul Wahab Mohammad, Siti Rozaimah Sheikh Abdullah, Mohd Hafizuddin Muhamad
Summary: The study investigated the interaction among operating parameters of an MBBR treating POME to determine the optimal conditions for COD and NH3-N removal. The optimal parameters were found to be 70 h HRT, 29% MFF, and Hexafilter as the biofilm carrier, achieving COD removal of 53.3% and NH3-N removal of 91.8%. These results suggest a viable alternative to conventional POME treatment.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Chemistry, Applied
Wei Lun Ang, Woei Jye Lau, Yi Hong Tan, Ebrahim Mahmoudi, Abdul Wahab Mohammad
Summary: Membrane technology has become a main filtration process in water/wastewater treatment, and the use of branched macromolecules in membrane research is gaining increasing attention. This review summarizes recent advances in polymeric membrane synthesis and modification using these macromolecules, and discusses their potential, challenges, and commercialization in membrane applications.
SEPARATION AND PURIFICATION REVIEWS
(2023)
Review
Engineering, Environmental
Nor Naimah Rosyadah Ahmad, Wei Lun Ang, Yeit Haan Teow, Abdul Wahab Mohammad, Nidal Hilal
Summary: This review discusses the current application of nanofiltration (NF) membrane in wastewater treatment, emphasizing its use in water recycling and product recovery. The performance optimization and future prospects of NF in industrial wastewater treatment are also discussed.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Akmal Suhaimi, Ebrahim Mahmoudi, Rhonira Latif, Kim S. Siow, M. Hazani M. Zaid, Abdul Wahab Mohammad, M. F. Mohd Razip Wee
Summary: Plasma-based surface modification using organosilicon precursor TEOS on PES membrane resulted in a superhydrophilic surface with improved water flux and anti-fouling properties, making it effective for trapping organic dyes.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Polymer Science
Asad Masood, Naeem Ahmed, M. F. Mohd Razip Wee, Anuttam Patra, Ebrahim Mahmoudi, Kim S. Siow
Summary: Antibacterial coatings are necessary to prevent bacterial colonization and infection in medical tools. This study presents a rapid and one-step atmospheric pressure plasma polymerization (APPP) method for producing nano-thin films with hydrophobic-like properties using D-limonene. The resulting films exhibit strong antibacterial activity and have the potential to be used for bacteria-resistant and biocompatible coatings on various substrates.
Article
Biochemistry & Molecular Biology
Dharshini Mohanadas, Puteri Mimie Isma Nordin, Rosiah Rohani, Nur Syafiqah Farhanah Dzulkharnien, Abdul Wahab Mohammad, Peer Mohamed Abdul, Suriani Abu Bakar
Summary: This study tested and compared the separation performance of different membranes for treating oily wastewater. The XT and MT membranes showed the best performance with high oil removal rate. However, wetting occurred in the membrane distillation method, causing flux reduction. Therefore, a membrane surface modification technique is required to improve the anti-fouling and anti-wetting properties of the membranes.
Review
Biochemistry & Molecular Biology
Nor Naimah Rosyadah Ahmad, Abdul Wahab Mohammad, Ebrahim Mahmoudi, Wei Lun Ang, Choe Peng Leo, Yeit Haan Teow
Summary: Due to the increasing demand for water resources, freshwater deficiency has become a significant issue affecting social and economic development in many countries. Nanofiltration (NF) is a promising technology for water reclamation, especially in desalination, water, and wastewater treatment fields. However, membrane fouling remains a major concern that hampers the performance of NF membranes and increases operating costs. This review summarizes recent progress in improving the resistance to fouling in NF membranes using three types of antifouling modifiers: nanoparticles, polymers, and composite polymer/nanoparticles. The review also discusses the correlation between antifouling performance and membrane properties such as hydrophilicity, surface chemistry, surface charge, and morphology.
Article
Biochemistry & Molecular Biology
S. N. S. A. Aziz, M. N. Abu Seman, S. M. Saufi, A. W. Mohammad, M. Khayet
Summary: UV irradiation was used to modify a commercial NF2 PES membrane for the preparation of a forward osmosis (FO) membrane. The modified membrane showed improved hydrophilicity and increased water permeate flux compared to the pristine NF2 PES membrane. The intrinsic characteristics of the membranes were determined through various techniques and the adopted non-pressurized test method proved to be more suitable for evaluating FO membrane properties.
Review
Engineering, Chemical
I. Ihsanullah, Muhammad Bilal, Muhammad Sajid, Abdul Wahab Mohammad, Muataz A. Atieh, Noreddine Ghaffour
Summary: This review critically summarizes the successful applications of MXene materials in the separation of oily emulsions. The unique characteristics of MXene materials position them as ideal candidates for oil/water separation applications. The paper evaluates the separation mechanisms, regeneration performance, stability, and durability of MXene-based materials and identifies current challenges and research gaps. Future prospects for advancing MXene-based oil/water separation technology are also presented.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Environmental
Francisco de Borja Ojembarrena, Elena Fuente, Angeles Blanco, Carlos Negro
Summary: Accumulation of Cr(VI) in industrial fiber cement process water can affect product quality and health, and it needs to be removed to avoid environmental risks. The study found that cationic cellulose nanocrystals (CCNCs) have higher adsorption efficiency and lower cost compared to conventional adsorbents.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Review
Engineering, Environmental
Shentan Liu, Yangchen Zhang, Xiaojuan Feng, Sang-Hyun Pyo
Summary: This paper summarizes the common problems of constructed wetlands (CWs) and proposes corresponding optimized solutions, including thermal insulation and additional aeration in cold climates, choosing suitable plant species and planting patterns to enhance phytoremediation in CWs, using various methods to monitor and evaluate CW clogging, implementing anti-clogging measures, controlling greenhouse gas emissions during CW treatment, constructing and utilizing CW databases, designing appropriate CW types, and implementing strict technical management and supervision.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Norzila Mohd, Nazlina Haiza Mohd Yasin, Wan Hasnidah Wan Osman, Mohd Sobri Takriff
Summary: This study demonstrates that Chlamydomonas sp. is effective in removing nutrients from palm oil mill effluent and shows particular efficiency in the removal of ammonium and phosphate.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Mingzhen Zhang, Guijian Liu, Ruijia Liu, Jinzhao Xu, Wen Si, Yong Wei
Summary: Tieguanyin tea stem was used to synthesize modified biochar for the adsorption of copper and zinc. Among the modified biochar, Fe-BCs had the highest adsorption capacity, with Fe-BC650 being the best adsorbent. It reached adsorption equilibrium in 1 minute and had a maximum adsorption capacity of 303.5996 mg/g for Cu (II) and 254.0711 mg/g for Zn (II) in single-metal solutions. However, there were antagonistic impacts between Cu2+ and Zn2+.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Lingling Zhao, Qiaoshu Zhou, Yun Yang, Yuan Zhang, Yewei Qiu, Yanjun Chen, Xian Jin, Xiangjun Yang, Shixiong Wang
Summary: This research presents a method for selectively recovering gold from e-waste water using metal sulfides microspheres prepared by hydrothermal technique. The results show that the assistance of visible light significantly improves the gold adsorption performance of metal sulfides. The metal sulfides exhibit excellent gold adsorption properties, high selectivity, ultra-high adsorption capacity, and good recyclability.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Organic-inorganic nanoblends, such as polysaccharide-blended-inorganic ones, have versatile applications and have gained significant research attention. In this study, a magnetic guar gum/graphene oxide nanocomposite blended with CuO was successfully prepared and investigated for its adsorption capacity for ciprofloxacin removal. The results showed that the nanocomposite exhibited excellent adsorption capacity and the adsorption process was spontaneous.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Umit Ecer, Sakir Yilmaz
Summary: A novel and effective catalyst Co@MIL-68(Fe)@Fe3O4@CM-BC was synthesized and used for the catalytic reduction of crystal violet in aqueous environments. The catalyst showed high efficiency in degrading crystal violet under specific conditions, and exhibited good regeneration performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Chi Zhang, Miao Zhang, Haohan Yang, Wei Cai, Jun Wu
Summary: Enhancing the bioaugmentation of common nitrifiers in the partial nitrification/anammox process can decrease the activity of nitrite oxidizing bacteria and increase the activity of anammox bacteria, leading to improved total nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Runzhang Zuo, Dajun Ren, Yangfan Deng, Canhui Song, Yubin Yu, Xiejuan Lu, Feixiang Zan, Xiaohui Wu
Summary: This study found that fine bubble aeration in membrane bioreactors (MBR) can better control membrane fouling and reduce energy consumption. However, compared to fine bubble aeration, coarse bubble aeration released more proteins and polysaccharides, resulting in a decrease in functional bacteria and enzymes involved in nitrogen and phosphorus pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ch Tahir Mehmood, Jiekai Dai, Hanjun Zhao, Ziyi Zhong
Summary: Wirelessly powered photocatalyst-coated spheres (WPS) have been developed and demonstrated for various applications, including photodegradation and fouling control. These WPS are cost-effective, easy to fabricate, and have excellent visible light sources, making them suitable as carriers for photocatalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Yifan Wang, Xiaoxuan Kang, Yuting Li, Ruyi Li, Chang Wu, Luyao Wang, Chongqing Wang, Tao Yang, Ming Ge, Zhangxing He
Summary: Cobalt/carbon nanofibers (Co/CNF) were prepared and exhibited excellent catalytic activity in the degradation of tetracycline by activating peroxodisulfate (PDS). The effects of process parameters on tetracycline removal were studied, and the reaction mechanism was confirmed through experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ting Wei, Yaqian Zhao, Jia Guo, Bin Ji, Alvaro Pun Garcia, Abraham Esteve Nunez
Summary: This study developed a novel lightweight substrate (Al-NLS) composed of aluminum sludge and polyurethane, and investigated its effectiveness in constructed wetlands (CWs). Results showed that Al-NLS had favorable adsorption capacities for phosphorus and removal efficiencies for pollutants in real domestic wastewater. It also positively influenced the microbial community. Therefore, Al-NLS can be considered as a new alternative substrate in CWs technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Dabojani Das, Achinta Bordoloi, Heyang Yuan, Daniel J. Caldwell, Rominder P. S. Suri
Summary: This study evaluates the degradation kinetics of antibiotic resistance genes and mobile genetic elements in water matrices by ozone treatment. The results show that extracellular antibiotic resistance genes can be effectively removed, while intracellular genes are more resistant to degradation. The impact of wastewater matrix on gene degradation is minimal.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)