c) 2023 - 131 Documents
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Item A COMPREHENSIVE REVIEW ON TAILORING FACTORS OF POROUS BISMUTH OXYHALIDE PHOTOCATALYSTS FOR WASTEWATER TREATMENT APPLICATION(Elsevier, 2023-11-25) Prasenjit, Kar; Govindasamy, Sathiyan; Vivekanandan, K E; Geetha, Venkatesan; Govindasamy, Siva; Ramesh, Subramani; Sabariswaran, KandasamyPhotocatalysis is a green, environmentally friendly approach for converting organic contaminants into harmless byproducts. Especially, Bismuth oxyhalides (BiOX, where X = Cl, Br and I) have emerged as promising photocatalysts for wastewater treatment due to their layered-by-layered structure, strong chemical stability and nontoxicity in compare to other metal oxides, which makes the photocatalyst advantageous for photocatalytic application.Item INVESTIGATING SIX TYPES OF BAMBOO CHARCOAL FOR ECO-FRIENDLY RENEWABLE ENERGY GENERATION(Springer Link, 2023-12-15) Thanpisit, Phuangchik; Paramasivam, Shanmugam; Sabariswaran, Kandasamy; Sirin, Bunnag; Supakorn, BoonyuenThe aim of this study was to investigate the physical and chemical properties of six types of bamboos: Kim sung (Bambusa beecheyana), Sang nuan (Dendrocalamus membranaceus Munro), Sang mon (D. sericeus Munro), Poe mae tawo (D. copelandii1), Man moo (D. copelandii2), and Ruak (Thyrsostachys siamensis) aged 1 year, 2 years, and 3 years, at culm. A torrefaction process was used to bring samples to a temperature of 340 °C. The residue was then ground into a fine powder, and the mass yield, energy yield, and physical and chemical composition were determined. The obtained mass yield and energy yield were 40.90–54.28% and 54.91–70.70%, respectively. The maximum heat value was at 1 year of culm age. D. membranaceus yielded the highest heat value at 24.36 Mj/kg and also had the lowest ash content of 4.97%. D. copelandii1 had the lowest moisture content of 1.72%. D. copelandii2 had the lowest volatile matter at 50.00%, and T. siamensis had the highest fixed carbon at 41.04%. At 2 years of culm age, D. membranaceus had the highest heat value of 23.80 Mj/kg, lowest ash content of 4.63%, and lowest moisture content of 1.12%. D. copelandii1 had the lowest volatile matter at 48.83%. T. siamensis had the highest fixed carbon, of 45.40%, at 3 years of culm age. T. siamensis had the highest heat value of 23.64 Mj/kg, the highest fixed carbon at 44.66%, and the lowest ash content at 5.86%. D. copelandii2 had the lowest moisture at 2.54% and also the lowest volatile matter at 42.03%. Our results suggest that D. membranaceus and T. siamensis are leading candidates as torrefied fuel sources.Item ANTIBIOFILM ACTIVITY OF BIOSURFACTANT PRODUCED BY A SPONGE-ASSOCIATED MARINE COBETIA SP. JCG-23(Springer Link, 2023-09-22) Govindarajan, Ganesan; Chandrasekar, Balu; Suganthi, Ganesan; Samuel Raj, Babu Arulmani; Sabariswaran, KandasamyMarine symbiotically associated microbes play a vital role and are an excellent source of natural compounds that exert wide biological activities. In this study, we have reported on the identification, characterization, phylogenetic relationship, and anti-biofilm surface-active compound-producing abilities of marine invertebrate sponge-associated Cobetia sp. JCG-23. Among 24 isolates, a total of five strains (JCG2, JCG19, JCG20, JCG22, and JCG23) have active surface molecule producing potential on the emulsification index assay. Interestingly, the potential candidate JCG-23, produces biosurfactants with low surface tension (22 Nm-1) that exert anti-biofilm activity against Pseudomonas aeruginosa PAO1. The isolate was identified as genus Cobetia sp. JCG-23 with 99.1% sequence similarity to Cobetia crustatorum (EU909460) based on 16S rRNA gene sequence analysis. The large-scale production, purification, stability, and characterization of biosurfactant were carried out and its surface activity was determined using the oil drop method. Subsequent spectral analysis such as UV, FT-IR, and GC-MS analysis indicated that the purified biosurfactant was a hydroxyl fatty acid, namely octadecanoic acid (C18H36O2) with a molecular weight of 284 m/z. Furthermore, the effect of antibiofilm activity on the viability of Pseudomonas aeruginosa PAO1 by static ring tube and light and confocal laser scanning microscopy analysis revealed that the octadecanoic acid from Cobetia sp. JCG-23 has strong biofilm dismantle ability against Pseudomonas aeruginosa PAO1. Further characterization of the biosurfactant from the isolate Cobetia sp. JCG-23 can pave the way for developing novel bioactive agents targeting biofilm-forming pathogens on topical and medical devices.Item ASSESSING POLLUTANT SORPTION EFFICIENCY OF MODIFIED AND UNMODIFIED BIOCHAR WITH BACILLUS CEREUS ON CONTAMINATED LAKE WATER: IMPLICATIONS FOR ORYZA SATIVA SEEDLING AND ARTEMIA FRANCISCANA LARVAE VIABILITY(Springer Link, 2023-10-02) Mathiyazhagan, Narayanan; Ramesh, Subramani; Sabariswaran, KandasamyThis study evaluated the efficacy of biochar in removing pollutants from a polluted lake. Biochar, both with and without Bacillus cereus, was assessed for its sorption potential. The treated water samples were analyzed for toxicity using Oryza sativa and Artemia franciscana larvae. The lake water exceeded permissible limits for pH, turbidity, dissolved oxygen (DO), chemical oxygen demand (COD), biological oxygen demand (BOD), and various metals. The 10-day biosorption study with different treatment groups (MB, UMB, MBB, UMBB, and BC) revealed that the MBB group exhibited remarkable pollutant sorption potential. It achieved pollutant removal percentages of 33.35% for Cd, 15.73% for As, 26.21% for Cr, 32.72% for Pb, 32.81% for Zn, 23.58% for Cu, 5.44% for Cl, 22.01% for Ni, 28.2% for Hg, and 4.19% for SO42−. MBB-treated lake water showed no toxicity, confirming pollutant removal by metal-tolerant Bacillus cereus in modified biochar.Item Β-CHITIN AND CHITOSAN FROM WASTE SHELLS OF EDIBLE MOLLUSKS AS A FUNCTIONAL INGREDIENT(Food Frontiers, 2023-10-21) Durairaj Karthick, Rajan; Kannan, Mohan; Jayakumar, Rajarajeswaran; Dharmaraj, Divya; Ragavendhar, Kumar; Sabariswaran, Kandasamy; Shubing, Zhang; Abirami Ramu, GanesanThe marine food-processing industries were producing large quantities of shell wastes as a discard. Currently, this waste material was underutilized and leads to the landfill as a significant environmental issue. The outer shells or exoskeletons of mollusks serve as the best source of chitin. Three different allomorphs of chitin (γ, β, and γ) were extracted from different species of crustaceans, mollusks, and fungi. β-Allomorphs predominantly exist in the shells of mollusks. β-Chitin and its deacetylated product chitosan has been utilized for its special characteristic features, including biocompatibility, environmental friendly, and nontoxic properties. The extraction of β-chitin and chitosan from the mollusk shell waste were evaluated in this work. Hence, this review aims to explore edible mollusk shell waste sources and its suitable extraction techniques, characterizations, and functional properties of mollusk-based β-chitin and chitosan. Further, the genetic pathway of synthesizing mollusk chitin was discussed. The entire life cycle assessment with techno-economic aspects were extrapolated to study the bottlenecks and tangible solution for the industrial upscaling of obtaining β-chitin and chitosan from the edible mollusk shell waste have been reviewed herein.Item TANNERY WASTEWATER REMEDIATION COMPETENCE OF METAL TOLERANT BACTERIA AND FUNGI UNDER THE INFLUENCE OF CHEMICALLY MODIFIED WATER HYACINTH BIOCHAR: AN IN VITRO EVALUATION(Springer Link, 2023-11-22) Kandasamy, Gajendiran; Ying, Ma; Sabariswaran, Kandasamy; Amal Abdullah A, Sabour; Maha, Alshiekheid; Arivalagan, Pugazhendhi; Mathiyazhagan, NarayananThis study was trying to find a sustainable approach to remediate the tannery wastewater by various treatments sets (set-I to set-VIII: consists of KOH modified biochar, Bacillus cereus, and Aspergillus flavus biomass), and treatment successfulness was determined by phytotoxicity and cytotoxicity studies on potential Vigna unguiculata seedlings and Artemia franciscana larvae, respectively. Three tannery wastewater samples were collected from 3 sites (I, II, and III); among them, the physicochemical properties of site I were beyond the permissible limits containing more volume of harmful heavy metals such as Cr, Cd, Pb, As, Co, Cu, Fe, Zn, and Mn than other sample. The test B. cereus and A. flavus showed remarkable metal tolerance to heavy metals such as Cr, Cd, Pb, As, Co, Cu, Fe, Zn, and Mn at 800 µg mL−1. The bioremediation study results stated that the KOH modified pre-synthesized and characterized water hyacinth biochar with the blend of B. cereus and A. flavus (treatment set-VII) biomass substantially reduced/removed (Cr, Cd, Pd, As, Co, Cu, Fe, Zn, and Mn as 54.75%, 49.52%, 30.49%, 17.53%, 29.07%, 14.75%, 5%, 27.27%, and 9.2%, respectively) the heavy metals from the tannery wastewater. The treatment effectiveness was determined by phytotoxicity and cytotoxicity studies on V. unguiculata seedlings and A. franciscana larvae, respectively. Among various treatment sets, the set-VII demonstrated absence of phytotoxicity and cytotoxicity on V. unguiculata seedlings and A. franciscana larvae, respectively. This clearly shows that the KOH modified biochar with B. cereus and A. flavus biomass can be used to manage and treat tannery wastewater in a sustainable manner.Item MICROBIAL DEGRADATION AND TRANSFORMATION OF PPCPS IN AQUATIC ENVIRONMENT: A REVIEW(Elsevier Ltd, 2023-08) Mathiyazhagan, Narayanan; Sabariswaran, Kandasamy; Jintae, Lee; Selvaraj, BarathiThe Pharmaceuticals and Personal Care Products (PPCPs) presence at harmful levels has been identified in aquatic ecosystems all over the world. Currently, PPCPs are more common in aquatic regions and have been discovered to be extremely harmful to aquatic creatures. Waste-water treatment facilities are the primary cause of PPCPs pollution in aquatic systems due to their limited treatment as well as the following the release of PPCPs. The degree of PPCPs elimination is primarily determined by the method applied for the remediation. It must be addressed in an eco-friendly manner in order to significantly improve the environmental quality or, at the very least, to prevent the spread as well as effects of toxic pollutants. However, when compared to other methods, environmentally friendly strategies (biological methods) are less expensive and require less energy. Most biological methods under aerobic conditions have been shown to degrade PPCPs effectively. Furthermore, the scientific literature indicates that with the exception of a few extremely hydrophobic substances, biological degradation by microbes is the primary process for the majority of PPCPs compounds. Hence, this review discusses about the optimistic role of microbe concerned in the degradation or transformation of PPCPs into non/less toxic form in the polluted environment. Accordingly, more number of microbial strains has been implicated in the biodegradation/transformation of harmful PPCPs through a process termed as bioremediation and their limitations.Item RECENT TRENDS IN POLYCYCLIC AROMATIC HYDROCARBONS POLLUTION DISTRIBUTION AND COUNTERACTING BIO-REMEDIATION STRATEGIES(Elsevier, 2023-10) Selvaraj, Barathi; Gitanjali, J; Gandhimathi, Rathinasamy; Nadana, Sabapathi; Aruljothi, K N; Jintae, Lee; Sabariswaran, KandasamyPolycyclic aromatic hydrocarbons (PAHs) are distributed worldwide due to long-term anthropogenic pollution sources. PAHs are recalcitrant and highly persistent in the environment due to their inherent properties, such as heterocyclic aromatic ring structures, thermostability, and hydrophobicity. They are highly toxic, carcinogenic, immunotoxic, teratogenic, and mutagenic to various life systems. This review focuses on the unique data of PAH sources, exposure routes, detection techniques, and harmful effects on the environment and human health. This review provides a comprehensive and systematic compilation of eco-friendly biological treatment solutions for PAH remediation, such as microbial remediation approaches utilizing microbial cultures. In situ and Ex situ bioremediation of PAH methods, including composting land farming, biopiles, bioreactors bioaugmentation, and phytoremediation processes, are discussed in detail, as is a summary of the factors affecting and limiting PAH bioremediation. This review provides an overview of emerging technologies that use multi-process combinatorial treatment approaches and answers to generating value-added by-products during PAH remediation.Item MARINE BIORESOURCES ARE A BOON FOR BIOPLASTIC PRODUCTION AS AN ALTERNATIVE TO CONVENTIONAL PLASTICS—A REVIEW(Springer Link, 2023-08-30) Mathiyazhagan, Narayanan; Jintae, Lee; Selvaraj, Barathi; Sabariswaran, KandasamyThe constant rise in global demand for plastic products has led to an uninterrupted increase in the production and utilization of petroleum-based conventional plastics. This has resulted in significant contamination of plastic waste due to its non-biodegradable nature, particularly within aquatic ecosystems, while the availability of petroleum resources is decreasing. Additionally, although bioplastics have been introduced as alternatives to traditional plastics, their primary production from plant sources has raised concerns regarding their harmful effects on ecosystems and human well-being. In response to these challenges, marine-based bioplastics have emerged as a promising and economically feasible solution to meet the growing demand for plastic products. Marine bioresource–based bioplastics possess favorable physicochemical properties and exhibit ease of degradation, making them attractive compounds for various applications. However, implementing marine bioplastics on a large scale requires further investigation. Therefore, the main objectives of this review are to emphasize the existing scientific gaps within the specific research area and clearly state the review’s objective view. Hence, this review provides a comprehensive summary of micro and microorganisms derived from marine resources for bioplastic production and explores potential applications in promoting human welfare without causing harm to the ecosystem.Item THE CURRENT STATE OF ALGAE IN WASTEWATER TREATMENT AND ENERGY CONVERSION: A CRITICAL REVIEW(Elsevier, 2023-06) Sabariswaran, Kandasamy; Mathiyazhagan, Narayanan; Rathinam, Raja; Kesavan, Devarayan; Kavitha, RDue to the rapid expansion of the global economy and population, there aren't enough water resources accessible for direct human consumption. Therefore, water remediation will unavoidably take center stage on a worldwide platform. The development of microalgae can be supported by several types of wastewater (WW). They might be able to clean up pollutants from industry and urban effluents. Due to its low energy requirements, microalgae's capacity to survive in various environmental circumstances, and the potential to convert WW nutrients into high-value chemicals, microalgae-based wastewater treatment (WWT) has already received attention. Recent studies have reported using microalgae to remove pharmaceutical compounds and pesticides from wastewater produced by industrial and agricultural processes and removing nutrients from wastewater from WWTs. As a result, utilizing microalgae for both wastewater treatment and biofuel production could be a cost-effective solution to these challenges. This review emphasizes recent developments in the production of microalgae for WW cleanup. Additionally, it highlights the current problems and opportunities in the emerging algae-based sector.