Article
Engineering, Environmental
Muhammad Zaheer Afzal, Peng Zu, Chun-Miao Zhang, Jing Guan, Chao Song, Xue-Fei Sun, Shu-Guang Wang
Summary: A novel hydrogel beads with dual roles of adsorbent and sonocatalyst were prepared and found to be effective for the removal of antibiotics from water. The hydrogel beads exhibited higher degradation efficiency in acidic media and could maintain high efficiency through regeneration process.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Qun Liu, Kun Xu, Guangxu Hu, Fanming Zeng, Xiao Li, Chun Li, Yu Zhang
Summary: In this study, a composite aerogel with large surface area, MIL-101(Cr)/PAM/CSA, was successfully synthesized and showed excellent adsorption performance and recycling capability. The introduction of MIL-101(Cr) significantly increased the specific surface area of the composite aerogel, which exhibits underwater superelastic properties.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Applied
Yuru Yang, Lei Zeng, Zongkun Lin, Huabin Jiang, Aiping Zhang
Summary: A chitosan-based bead was synthesized by crosslinking and sulfhydryl modification reaction, with good removal ability for heavy metal ions Pb2+, Cu2+, and Cd2+. The adsorption process of the beads fits the Langmuir isotherm model and pseudo second-order kinetics model.
CARBOHYDRATE POLYMERS
(2021)
Article
Biochemistry & Molecular Biology
Beenish Sadaqat, Chong Sha, Mudasir Ahmad Dar, Maruti J. Dhanavade, Kailas D. Sonawane, Hassan Mohamed, Weilan Shao, Yuanda Song
Summary: In this study, beta-mannanase from Thermotoga maritima was immobilized on chitosan beads. The immobilization was confirmed through FTIR and XRD analysis. The immobilized enzyme exhibited higher thermostability and retained good operational stability.
Article
Engineering, Chemical
Gunho Song, Sanghwa Oh
Summary: Adsorption kinetics of As and Pb onto composite beads synthesized with stone powder, chitosan, and maghemite were investigated. Multiple kinetic models were utilized to analyze the kinetics, and the modified two compartment first order kinetic model (MTCFOKM) predicted the most accurately. The SCM beads showed high affinity for Pb adsorption compared to As adsorption, and the column study confirmed their effectiveness in Pb removal from contaminated groundwater.
Article
Engineering, Chemical
Jingju Cai, Minghua Zhou, Xuedong Du, Xin Xu
Summary: The electrochemical activation of PS using Blue-TNT as anode proved to be effective in degrading 2,4-D with low energy consumption and significantly higher rate constants. Blue-TNT mainly relies on (OH)· radicals for 2,4-D degradation, showing clear advantages over traditional methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Chonnakarn Panawong, Kunlarat Phonlakan, Supinya Nijpanich, Soraya Pornsuwan, Surangkhana Budsombat
Summary: In this study, a biodegradable cobalt-based peroxymonosulfate (PMS) activator consisting of crosslinked chitosan (CS) and zeolitic imidazolate framework-67 (ZIF-67) beads was prepared. The composite beads showed high catalytic performance for rhodamine B (RhB) degradation, with a maximum degradation rate of 98% achieved with CS/7.5%ZIF-67 and a PMS concentration of 0.15 g/L. The composite beads effectively facilitated the degradation of various dyes, making it a simple and cost-effective method for dye degradation with easy separation and recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Zhiping Zhou, Tingting Liu, Shengjie Zhu, Fei Song, Wenwen Zhang, Wenming Yang, Wanzhen Xu
Summary: In this study, a sensitive electrochemical sensor based on chitosan modified aminoated hierarchical porous silica-supported gold and molecularly imprinted polymers film was developed for detection of 2, 4-dichlorophenoxyacetic acid. The sensor showed good selectivity and low detection limit. The porous structure of the hierarchical porous silica-supported gold provided more imprinting recognition sites, while chitosan enhanced the mechanical strength of the film.
MICROCHEMICAL JOURNAL
(2022)
Article
Public, Environmental & Occupational Health
Wei Wang, Yucheng Ma, Jiawei Chen, Liao Peng, Xiaoshuai Gao, Lede Lin, Fuxun Zhang, Yang Xiong, Feng Qin, Jiuhong Yuan
Summary: In this study using NHANES data, no significant association was found between 2,4-D exposure and erectile dysfunction in American men. The results suggest that 2,4-D may not have adverse effects on erectile function.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Xiaojing Long, Tianning Wang, Mengchang He
Summary: In this study, efficient adsorption material nano-titania-crosslinked chitosan beads were synthesized for simultaneous removal of antimony (Sb) and arsenic (As) from aqueous solution. The material exhibited high removal performance for Sb and As under weakly acidic and neutral conditions but was significantly inhibited under alkaline pH values. The adsorption kinetics followed the pseudo-second-order model and the adsorption isotherms followed the Langmuir model.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Perumal Karthikeyan, Sankaran Meenakshi
Summary: A novel and environmentally-friendly chitosan encapsulated magnetic kaolin beads were fabricated and applied for the adsorption of phosphate and nitrate ions from water in this study. The synthesized beads showed promising potential as selective and effective adsorbents for the removal of phosphate and nitrate ions from aqueous solutions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
K. Kayalvizhi, N. M. Alhaji, D. Saravanakkumar, S. Beer Mohamed, K. Kaviyarasu, A. Ayeshamariam, Amal M. Al-Mohaimeed, Mohamed Ragab AbdelGawwad, Mohamed S. Elshikh
Summary: This study investigated the adsorption behavior of biomaterial activated Sawdust-Chitosan nanocomposite beads on Ni (II) and Cu (II) ions removal from aqueous solutions. The structural analysis and surface morphology were evaluated using PXRD, TEM, and EDAX techniques, while the functional groups behavior was discussed using FTIR technique. The adsorption properties were determined using isotherm models and the maximum adsorption capacity was inferred.
ENVIRONMENTAL RESEARCH
(2022)
Article
Polymer Science
Faisal Kholiya, Ankit Singh, Amit Gosai, Ramavatar Meena
Summary: Agaraldehyde and chitosan functional beads were prepared as dye adsorbent for removing seven dyes from aqueous solutions, with a focus on amido black dye. The bio-beads showed encouraging adsorption efficiency and followed both Langmuir and Freundlich isotherms, while adhering to pseudo-second-order kinetics for dye removal. This study highlighted the potential of R-A(ald)-CHI as an effective adsorbent for dye removal from wastewater.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Di Pang, Yue Liu, Haiou Song, Duozhe Chen, Weiqing Zhu, Rumeng Liu, Hu Yang, Aimin Li, Shupeng Zhang
Summary: In this study, a Ti3+- and N-codoped TiO2 nanotube array (TiON) anode was fabricated by electrochemical reduction, which showed significantly improved electrochemical performance in the electrocatalytic oxidation of tetracycline and metronidazole. The achieved TiON anode demonstrated high removal efficiency for both antibiotics, indicating its potential practical application in water treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Reda M. Abdelhameed, Mahmoud El-Shahat, Hassan Abdel-Gawad, Bahira Hegazi
Summary: The current paper describes the application of newly formulated beads from copper-benzenetricarboxylate (Cu-BTC), polyacrylonitrile (PAN), and chitosan (C), Cu-BTC@C-PAN, C-PAN, and PAN, for the removal of phenolic chemicals from water. The adsorption optimization of 4-chlorophenol (4-CP) and 4-nitrophenol (4-NP) using beads was studied, including the effects of various experimental factors. The Langmuir model and pseudo-second-order kinetic equation were found to be suitable for explaining the adsorption isotherms and kinetics of the system. Cu-BTC@C-PAN beads showed higher adsorption capacities compared to PAN for both 4-CP and 4-NP.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Environmental Sciences
Akash Balakrishnan, Mahendra Chinthala
Summary: The research on graphitic carbon nitride (g-C3N4) for energy and environmental remediation has attracted significant attention due to its excellent electronic structure and properties. However, challenges such as high recombination rate and mass loss during recovery operations have been identified. Various strategies and preparation methods for overcoming these difficulties and improving the photocatalytic applications of g-C3N4 based materials have been discussed in this review.
Review
Chemistry, Multidisciplinary
Akash Balakrishnan, Sowmya Appunni, Mahendra Chinthala, Dai-Viet N. Vo
Summary: TiO2 photocatalysts have the potential to address water pollution issues, but there are certain limitations. Recent studies have shown that using biopolymer-supported photocatalysts can overcome these limitations and improve the stability, reusability, and adsorptive capacity of the catalysts.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Environmental Sciences
Adithya Sridhar, Akash Balakrishnan, Meenu Mariam Jacob, Mika Sillanpaa, Nanditha Dayanandan
Summary: The COVID-19 pandemic has had a significant impact on the global agro-food system and economy, particularly in terms of food production, demand, price hikes, security, and supply chain. In order to achieve sustainable development goals, sustainable agricultural practices should be adopted and the use of digital tools in the agro-food sector should be explored.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Engineering, Chemical
M. Helen Kalavathy, G. Keerthiga
Summary: This review summarizes the preparation, characterization, and applications of graphene using fruit waste as a precursor. Different methods of preparation can synthesize graphene with properties suitable for mechanical and thermal applications. Comparing the choice of preparation methods and their performance can guide the commercialization of graphene for various applications.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Akash Balakrishnan, Mika Sillanpaa, Meenu Mariam Jacob, Dai-Viet N. Vo
Summary: Metformin is a versatile drug used for anti-hypoglycemia and cancer suppression. Its widespread usage results in accumulation in waste water and aquatic environments, posing health risks to living beings. Different strategies are needed to eliminate metformin from wastewater.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Akash Balakrishnan, Ghanghor Jayant Gaware, Mahendra Chinthala
Summary: This review summarizes the recent progress on heterojunction photocatalysts for eliminating nitrophenols, highlighting the mechanisms of electron-hole pair separation and evaluating the performance of the photocatalysts. The results show that Z-scheme heterojunction exhibits the highest removal efficiency, and further research is needed to improve the reusability of the heterojunction photocatalyst.
Article
Environmental Sciences
Akash Balakrishnan, Mahendra Chinthala, Rajesh Kumar Polagani, Dai-Viet N. Vo
Summary: Tetracycline is one of the most widely used antibiotics in human therapy, veterinary applications, and agricultural activities. Its consumption is expected to increase by over 30% by 2030. This review focuses on the recent advancements in photocatalytic degradation of tetracycline using graphitic carbon nitride-based photocatalysts, which offer higher visible light activity, low cost, and non-toxicity. The properties, worldwide consumption, occurrence, and environmental impacts of tetracycline are comprehensively discussed. The occurrence of tetracycline in various water matrices has been confirmed, with a maximum concentration of 54 μg/L. Among different graphitic carbon nitride-based materials, heterojunctions have shown the highest photocatalytic degradation efficiency of 100% with reusability for up to 5 cycles. Photocatalytic membranes are found to be feasible due to ease of recovery and better reusability. The limitations and efficient solutions for graphitic carbon nitride-based wastewater treatment technology are also emphasized in detail.
ENVIRONMENTAL RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Akash Balakrishnan, Sowmya Appunni, Mahendra Chinthala, Meenu Mariam Jacob, Dai-Viet N. Vo, Soreddy Sainath Reddy, Emmanuel Sebastian Kunnel
Summary: Water contamination is a growing global issue, and current methods for water and wastewater treatment are limited, especially in terms of difficult regeneration of fossil-fuel derived nano-adsorbents. Advanced methods using sustainable materials like chitosan are needed. Chitosan, a biopolymer extracted from shellfish, is non-toxic, abundant, and chemically stable. It can be shaped into various forms for wastewater treatment. In this review, we focus on chitosan-based beads and their applications in wastewater treatment, including adsorption mechanisms, pollutant removal, functionalization, and regeneration. Notably, chitosan/Fe-hydroxyapatite beads have high adsorption capacity for lead removal, while imprinted magnetic chitosan beads show good reusability for nickel removal.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Review
Engineering, Chemical
Keerthiga Gopalram, Ashish Kapoor, Anagha Sunil, Gayathri Rangasamy, P. Senthil Kumar
Summary: The disposal of various contaminants in water resources is a serious threat to the environment and health. MXenes and MXene-derived materials have shown great potential as novel techniques for water purification and sensing due to their unique characteristics. This review provides an overview of recent advances in MXenes and MXene-based composites for the remediation and detection of water contaminants. The progress in their application in water treatment techniques such as membrane separations, photocatalysis, and adsorption, as well as the developments in MXene-based sensors for water pollutant detection, are discussed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Review
Environmental Sciences
A. Balakrishnan, M. M. Jacob, P. Senthil Kumar, A. Kapoor, M. Ponnuchamy, P. Sivaraman, M. Sillanpaa
Summary: Management of hospital wastewater, especially during the COVID-19 pandemic, is challenging due to the presence of various contaminants, including SARS-CoV-2, pharmaceuticals, and human excreta. It is crucial to identify effective treatment strategies to ensure human and environmental safety. Non-contact methods like ultraviolet irradiation and preventive approaches such as antimicrobial surface coating show promise in reducing disease transmission.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Akash Balakrishnan, Emmanuel Sebastian Kunnel, Roshini Sasidharan, Mahendra Chinthala, Arvind Kumar
Summary: In this study, a sustainable visible light active g-C3N4 hydrogel was successfully synthesized and demonstrated its potential for water reclamation and H2O2 production. The chemically functionalized BCN hydrogel showed excellent photocatalytic efficiency and reusability. This research provides insights into systematically modifying g-C3N4 for sustainable energy and environmental applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Akash Balakrishnan, Mahendra Chinthala
Summary: In this study, oxalic acid-induced chemically functionalized graphitic carbon nitride (OCN) was prepared using a one-pot calcination method. The OCN exhibited a highly porous structure with enhanced surface area and abundant amino groups, resulting in a maximum tetracycline removal of 92% within 90 min of visible light illumination. The increased presence of amino groups and enhanced visible light absorption were attributed to the exceptional photocatalytic efficacy of the functionalized OCN.
ENVIRONMENTAL POLLUTION
(2023)
Article
Electrochemistry
Abinaya Stalinraja, Keerthiga Gopalram
Summary: This research investigates the electrocatalytic reduction of CO2 to produce value-added substances using sustainable energy. The results demonstrate that using CTAB as a capping agent and molecular promotor improves the reduction efficiency, and the Cu/Cu-WC electrode exhibits a higher Faradaic efficiency during electrolysis.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Engineering, Chemical
Gopalram Keerthiga, Akash Balakrishnan, Kiruthika Sathiasivan
Summary: This study optimized the degradation of 2,4-dichlorophenoxyacetic acid using a modified TiO2 catalyst in a glass fabricated photocatalytic reactor through response surface methodology. By optimizing critical parameters, a high removal efficiency of the pollutant was achieved.
DESALINATION AND WATER TREATMENT
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
M. Saranya Devi, S. Abinaya, T. Maiyalagan, G. Keerthiga
Summary: In this study, monoclinic bismuth oxide (a-Bi2O3) was synthesized with and without surfactant, and its performance in the photocatalytic degradation of methylene blue was compared. The presence of surfactant created nanorods of a-Bi2O3/P123, which showed higher photocatalytic degradation efficiency than a-Bi2O3 and P25.
MATERIALS TODAY-PROCEEDINGS
(2022)
