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Jayakumar M, Emana AN, Subbaiya R, Ponraj M, Ashok Kumar KK, Muthusamy G, Kim W, Karmegam N. Detoxification of coir pith through refined vermicomposting engaging Eudrilus eugeniae. Chemosphere 2022; 291:132675. [PMID: 34710456 DOI: 10.1016/j.chemosphere.2021.132675] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 09/16/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Hazardous coir industrial waste, coir pith has been subjected to 50 days vermicomposting with Eudrilus eugeniae by amending nitrogenous legume plant, Gliricidia sepium together with cattle dung in different combinations, after 21 days precomposting using Pleurotus sajor-caju spawn. An increase in electrical conductivity, total NPK and calcium, and a decrease in organic matter, total organic carbon, C/N ratio, C/P ratio and total phenolic content in the final vermicompost were observed. Dehydrogenase, urease and cellulase activity peaked up to 30 days of vermicomposting and then declined. The phytotoxicity studies with Brassica juncea, C/N ratio and enzyme activities confirmed the stability and maturity of vermicompost. The results also demonstrated that the 2:3:1 ratio (coir pith + Gliricidia sepium + cow dung) is a suitable effective combination for nutrient-rich (N: 2.43%; P: 0.92%; K: 2.09%) vermicompost production. The total phenolic contents declined during the vermicomposting with a lower final content of 21.26 mg/g GAE in 2:3:1 combination of substrates from the initial level (105.56 mg/g GAE). Besides, the concentration of total phenol contents inversely related to the germination index of Brassica juncea (r = -0.761), indicating that the phenolic content could also play an important role in phytotoxicity. Growth and fecundity of Eudrilus eugeniae in 2:3:1 combination revealed the acceptability and rapid decomposition of coir pith substrate into vermifertilizer.
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Affiliation(s)
- Mani Jayakumar
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia
| | - Abdi Nemera Emana
- Department of Chemical Engineering, Haramaya Institute of Technology, Haramaya University, Haramaya, Dire Dawa, Ethiopia
| | - Ramasamy Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box: 21692, Kitwe, Zambia
| | - Mohanadoss Ponraj
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box: 21692, Kitwe, Zambia
| | - Krishna Kumar Ashok Kumar
- Department of Biotechnology, School of Life Sciences, Vels Institute of Science, Technology and Advanced Studies, Pallavaram, 600 117, Chennai, Tamil Nadu, India
| | - Govarthanan Muthusamy
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Natchimuthu Karmegam
- Department of Botany, Government Arts College (Autonomous), Salem, 636007, Tamil Nadu, India.
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Manikandan S, Subbaiya R, Saravanan M, Ponraj M, Selvam M, Pugazhendhi A. A critical review of advanced nanotechnology and hybrid membrane based water recycling, reuse, and wastewater treatment processes. Chemosphere 2022; 289:132867. [PMID: 34774910 DOI: 10.1016/j.chemosphere.2021.132867] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/20/2021] [Accepted: 11/08/2021] [Indexed: 05/28/2023]
Abstract
One of the modern challenges is to provide clean and affordable drinking water. Water scarcity is caused by the growing population in the world and pollutants contaminate all remaining water sources. Innovative water treatment solutions have been provided by nanotechnology. Microorganisms, organic suspensions, and inorganic heavy metal ions, among other things, are common water contaminants. Since antiquity, a wide range of water clean-up methods have been employed to address this issue. Breakthroughs in water purification procedures have occurred during the previous four decades, with the most significant one being the use of nanomaterials and nanomembranes. Nanoparticles and nanomembranes (polymeric membranes) have recently been used in engineered materials (TiO2, ZnO, CuO, Ag, CNT's and mixed oxide nanoparticles, for example). Engineered nanomembranes, nanocomposites and nanoparticles have been used in this review article's discussion of water purification technologies. The review also discusses the risk and solutions of using nanoparticles and nanocomposites in the future.
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Affiliation(s)
- Sivasubramanian Manikandan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - Ramasamy Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box, 21692, Kitwe, Zambia
| | - Muthupandian Saravanan
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, 60007, Chennai, India.
| | - Mohanadoss Ponraj
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box, 21692, Kitwe, Zambia
| | - Masilamani Selvam
- Department of Biotechnology, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Chennai, 600 095, Tamil Nadu, India
| | - Arivalagan Pugazhendhi
- School of Renewable Energy, Maejo University, Chiang Mai, Thailand; College of Medical and Health Science, Asia University, Taichung, Taiwan.
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S. Patankar R, P. Zambare V, Ponraj M. Physiological aspects of the halophilic and halotolerant fungi, and their potential applications. Novel Research in Microbiology Journal 2021. [DOI: 10.21608/nrmj.2021.199315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Bagiya MS, Sunil AS, Rolland L, Nayak S, Ponraj M, Thomas D, Ramesh DS. Mapping the Impact of Non-Tectonic Forcing mechanisms on GNSS measured Coseismic Ionospheric Perturbations. Sci Rep 2019; 9:18640. [PMID: 31819071 PMCID: PMC6901456 DOI: 10.1038/s41598-019-54354-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/30/2019] [Indexed: 11/29/2022] Open
Abstract
Global Navigation Satellite System (GNSS) measured Total Electron Content (TEC) is now widely used to study the near and far-field coseismic ionospheric perturbations (CIP). The generation of near field (~500–600 km surrounding an epicenter) CIP is mainly attributed to the coseismic crustal deformation. The azimuthal distribution of near field CIP may contain information on the seismic/tectonic source characteristics of rupture propagation direction and thrust orientations. However, numerous studies cautioned that before deriving the listed source characteristics based on coseismic TEC signatures, the contribution of non-tectonic forcing mechanisms needs to be examined. These mechanisms which are operative at ionospheric altitudes are classified as the i) orientation between the geomagnetic field and tectonically induced atmospheric wave perturbations ii) orientation between the GNSS satellite line of sight (LOS) geometry and coseismic atmospheric wave perturbations and iii) ambient electron density gradients. So far, the combined effects of these mechanisms have not been quantified. We propose a 3D geometrical model, based on acoustic ray tracing in space and time to estimate the combined effects of non-tectonic forcing mechanisms on the manifestations of GNSS measured near field CIP. Further, this model is tested on earthquakes occurring at different latitudes with a view to quickly quantify the collective effects of these mechanisms. We presume that this simple and direct 3D model would induce and enhance a proper perception among the researchers about the tectonic source characteristics derived based on the corresponding ionospheric manifestations.
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Affiliation(s)
- Mala S Bagiya
- Indian Institute of Geomagnetism (DST), Navi Mumbai, India.
| | - A S Sunil
- Indian Institute of Geomagnetism (DST), Navi Mumbai, India
| | - Lucie Rolland
- Université Côte d'Azur, OCA, CNRS, IRD, Géoazur, Sophia-Antipolis, Valbonne, France
| | - Srinivas Nayak
- Indian Institute of Geomagnetism (DST), Navi Mumbai, India
| | - M Ponraj
- Indian Institute of Geomagnetism (DST), Navi Mumbai, India
| | - Dhanya Thomas
- Indian Institute of Geomagnetism (DST), Navi Mumbai, India
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Ponraj M, Dubashi B, Harish BH, Kayal S, Cyriac SL, Pattnaik J, Ranjith K, Pillai US, Jadhav N, Matta KK, Singh J, Jaffa E, Prakash B. Cefepime vs. cefoperazone/sulbactam in combination with amikacin as empirical antibiotic therapy in febrile neutropenia. Support Care Cancer 2018; 26:3899-3908. [DOI: 10.1007/s00520-018-4260-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 05/06/2018] [Indexed: 01/06/2023]
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Jayasurya R, Srinivas BH, Ponraj M, Haridasan S, Parameswaran S, Priyamvada PS. Karyomegalic interstitial nephropathy following ifosfamide therapy. Indian J Nephrol 2016; 26:294-7. [PMID: 27512305 PMCID: PMC4964693 DOI: 10.4103/0971-4065.171233] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Ifosfamide (IFO), an alkylating agent used for the management of solid organ tumors, can cause reversible Fanconi's syndrome and acute kidney injury. Karyomegalic interstitial nephropathy (KIN) is a rare form of chronic tubulointerstitial nephritis, initially described as a familial nephropathy in adults. So far, four cases of KIN have been reported in pediatric and adolescent population following treatment with IFO. We report a 22-year-old man who developed renal dysfunction following IFO therapy for relapsed Hodgkin's lymphoma. Renal biopsy revealed chronic tubulointerstitial nephritis with atypical tubular epithelial cells showing nuclear enlargement and hyperchromasia, consistent with a diagnosis of KIN. The renal function improved following a short course of corticosteroids.
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Affiliation(s)
- R Jayasurya
- Department of Nephrology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - B H Srinivas
- Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - M Ponraj
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - S Haridasan
- Department of Nephrology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - S Parameswaran
- Department of Nephrology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - P S Priyamvada
- Department of Nephrology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
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Azimi M, Ponraj M, Bagherpourhamedani A, Md. Tahir M, Sk Abd. Razak SM, Peng Pheng O. SHEAR CAPACITY EVALUATION OF REINFORCED CONCRETE BEAMS: FINITE ELEMENT SIMULATION. Jurnal Teknologi 2015; 77. [DOI: 10.11113/jt.v77.6400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
The shear performance of reinforced concrete beams with rectangle cross-section and two different continuous rectangular spiral shear reinforcement under monotonous loading is numerically evaluated. Further, the behaviour of two continuous shear reinforcement systems named, “Single Square Spring Shear Resistance System” (SSSSRS) and “Double Square Spring Shear Resistance System” (DSSSRS) as transverse reinforcements are compared with conventional discontinuous system “Stirrups”. The finite element study includes three (3) beams. The results clearly show that the application of continuous shear reinforcement system delivered improved shear behaviour and enhanced bearing capacity in beams. Beams with Single Square Spring Shear Resistance System (SSSSRS) and Double Square Spring Shear Resistance System (DSSSRS) exhibited 14.4% and 19.8% increased shear performance in comparison with conventional control beam. It was concluded that under the same deflection higher forces was achieved for “Single Square Spring Shear Resistance System” (SSSSRS) and “Double Square Spring Shear Resistance System” (DSSSRS) compared to control specimens.
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Rezania S, Ponraj M, Talaiekhozani A, Mohamad SE, Md Din MF, Taib SM, Sabbagh F, Sairan FM. Perspectives of phytoremediation using water hyacinth for removal of heavy metals, organic and inorganic pollutants in wastewater. J Environ Manage 2015; 163:125-33. [PMID: 26311085 DOI: 10.1016/j.jenvman.2015.08.018] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 05/08/2023]
Abstract
The development of eco-friendly and efficient technologies for treating wastewater is one of the attractive research area. Phytoremediation is considered to be a possible method for the removal of pollutants present in wastewater and recognized as a better green remediation technology. Nowadays the focus is to look for a sustainable approach in developing wastewater treatment capability. Water hyacinth is one of the ancient technology that has been still used in the modern era. Although, many papers in relation to wastewater treatment using water hyacinth have been published, recently removal of organic, inorganic and heavy metal have not been reviewed extensively. The main objective of this paper is to review the possibility of using water hyacinth for the removal of pollutants present in different types of wastewater. Water hyacinth is although reported to be as one of the most problematic plants worldwide due to its uncontrollable growth in water bodies but its quest for nutrient absorption has provided way for its usage in phytoremediation, along with the combination of herbicidal control, integratated biological control and watershed management controlling nutrient supply to control its growth. Moreover as a part of solving wastewater treatment problems in urban or industrial areas using this plant, a large number of useful byproducts can be developed like animal and fish feed, power plant energy (briquette), ethanol, biogas, composting and fiber board making. In focus to the future aspects of phytoremediation, the utilization of invasive plants in pollution abatement phytotechnologies can certainly assist for their sustainable management in treating waste water.
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Affiliation(s)
- Shahabaldin Rezania
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia; Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor, Malaysia
| | - Mohanadoss Ponraj
- Construction Research Center (CRC), Institute for Smart Infrastructure and Innovation Construction (ISIIC), Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia.
| | - Amirreza Talaiekhozani
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia; Department of Civil Engineering, Jami Institute of Technology, Isfahan, Iran
| | - Shaza Eva Mohamad
- Malaysia Japan International Institute of Technology, UTM, Kuala Lumpur, Malaysia.
| | - Mohd Fadhil Md Din
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia; Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor, Malaysia
| | - Shazwin Mat Taib
- Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor, Malaysia
| | - Farzaneh Sabbagh
- Faculty of Chemical Engineering, Bioprocess Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia
| | - Fadzlin Md Sairan
- Centre for Environmental Sustainability and Water Security (IPASA), Research Institute for Sustainable Environment, Universiti Teknologi Malaysia (UTM), 81310 Johor Bahru, Malaysia; Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), 81310 Johor, Malaysia
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Majidnia Z, Idris A, Majid M, Zin R, Ponraj M. Efficiency of barium removal from radioactive waste water using the combination of maghemite and titania nanoparticles in PVA and alginate beads. Appl Radiat Isot 2015; 105:105-113. [PMID: 26275818 DOI: 10.1016/j.apradiso.2015.06.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 05/31/2015] [Accepted: 06/19/2015] [Indexed: 11/29/2022]
Abstract
In this paper, both maghemite (γ-Fe2O3) and titanium oxide (TiO2) nanoparticles were synthesized and mixed in various ratios and embedded in PVA and alginate beads. Batch sorption experiments were applied for removal of barium ions from aqueous solution under sunlight using the beads. The process has been investigated as a function of pH, contact time, temperature, initial barium ion concentration and TiO2:γ-Fe2O3 ratios (1:10, 1:60 and 1). The recycling attributes of these beads were also considered. Furthermore, the results revealed that 99% of the Ba(II) was eliminated in 150min at pH 8 under sunlight. Also, the maghemite and titania PVA-alginate beads can be readily isolated from the aqueous solution after the process and reused for at least 7 times without significant losses of their initial properties. The reduction of Ba(II) with maghemite and titania PVA-alginate beads fitted the pseudo first order and second order Langmuir-Hinshelwood (L-H) kinetic model.
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Affiliation(s)
- Zohreh Majidnia
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, UniversitiTeknologi Malaysia, UTM, Skudai, 81310 Johor Bahro, Malaysia
| | - Ani Idris
- Department of Bioprocess Engineering, Faculty of Chemical Engineering, UniversitiTeknologi Malaysia, UTM, Skudai, 81310 Johor Bahro, Malaysia.
| | - MuhdZaimiAbd Majid
- Construction Research Center (CRC), Institute for Smart Infrastructure and Innovation Construction (ISIIC), Faculty of Civil Engineering, UniversitiTeknologi Malaysia, UTM Skudai, 81310, Johor Bahru, Malaysia
| | - RosliMohamad Zin
- Construction Research Center (CRC), Institute for Smart Infrastructure and Innovation Construction (ISIIC), Faculty of Civil Engineering, UniversitiTeknologi Malaysia, UTM Skudai, 81310, Johor Bahru, Malaysia
| | - Mohanadoss Ponraj
- Construction Research Center (CRC), Institute for Smart Infrastructure and Innovation Construction (ISIIC), Faculty of Civil Engineering, UniversitiTeknologi Malaysia, UTM Skudai, 81310, Johor Bahru, Malaysia
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Ashokkumar V, Agila E, Salam Z, Ponraj M, Din MFM, Ani FN. A study on large scale cultivation of Microcystis aeruginosa under open raceway pond at semi-continuous mode for biodiesel production. Bioresour Technol 2014; 172:186-193. [PMID: 25262427 DOI: 10.1016/j.biortech.2014.08.100] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 08/22/2014] [Accepted: 08/24/2014] [Indexed: 05/09/2023]
Abstract
The study explores on upstream and downstream process in Microcystis aeruginosa for biodiesel production. The alga was isolated from temple tank, acclimatized and successfully mass cultivated in open raceway pond at semi-continuous mode. A two step combined process was designed and harvested 99.3% of biomass, the daily dry biomass productivity was recorded up to 28gm(-2)day(-1). The lipid extraction was optimized and achieved 21.3%; physicochemical properties were characterized and found 11.7% of FFA, iodine value 72% and 99.2% of ester content. The lipid was transesterified by a two step simultaneous process and produced 90.1% of biodiesel; the calorific value of the biodiesel was 38.8MJ/kg. Further, the physicochemical properties of biodiesel was characterized and found to be within the limits of American ASTM D6751. Based on the areal and volumetric biomass productivity estimation, M. aeruginosa can yield 84.1 tons of dry biomass ha(-1)year(-1).
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Affiliation(s)
- Veeramuthu Ashokkumar
- Energy Research Alliance, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia.
| | - Elango Agila
- Centre for Advanced Studies in Botany, University of Madras, Chennai 600 025, TamilNadu, India
| | - Zainal Salam
- Center of Electrical Energy Systems, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
| | - Mohanadoss Ponraj
- Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Malaysia
| | - Mohd Fadhil Md Din
- Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Malaysia
| | - Farid Nasir Ani
- Energy Research Alliance, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia.
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Talaiekhozani A, Jorfi S, Ali Fulazzaky M, Ponraj M, Abd Majid M, Hossin Navarchian A, Reza Talaie M, Zare S. Lab-scale optimization of propylene glycol removal from synthetic wastewater using activated sludge reactor**. Desalination and Water Treatment 2014; 52:(ix)-(ix). [DOI: 10.1080/19443994.2013.862399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Md Din MF, Lee YY, Ponraj M, Ossen DR, Iwao K, Chelliapan S. Thermal comfort of various building layouts with a proposed discomfort index range for tropical climate. J Therm Biol 2014; 41:6-15. [PMID: 24679966 DOI: 10.1016/j.jtherbio.2014.01.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 01/22/2014] [Accepted: 01/22/2014] [Indexed: 10/25/2022]
Abstract
Recent years have seen issues related to thermal comfort gaining more momentum in tropical countries. The thermal adaptation and thermal comfort index play a significant role in evaluating the outdoor thermal comfort. In this study, the aim is to capture the thermal sensation of respondents at outdoor environment through questionnaire survey and to determine the discomfort index (DI) to measure the thermal discomfort level. The results indicated that most respondents had thermally accepted the existing environment conditions although they felt slightly warm and hot. A strong correlation between thermal sensation and measured DI was also identified. As a result, a new discomfort index range had been proposed in association with local climate and thermal sensation of occupants to evaluate thermal comfort. The results had proved that the respondents can adapt to a wider range of thermal conditions.Validation of the questionnaire data at Putrajaya was done to prove that the thermal sensation in both Putrajaya and UTM was almost similar since they are located in the same tropical climate region. Hence, a quantitative field study on building layouts was done to facilitate the outdoor human discomfort level based on newly proposed discomfort index range. The results showed that slightly shaded building layouts of type- A and B exhibited higher temperature and discomfort index. The resultant adaptive thermal comfort theory was incorporated into the field studies as well. Finally, the study also showed that the DI values were highly dependent on ambient temperature and relative humidity but had fewer effects for solar radiation intensity.
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Affiliation(s)
- Mohd Fadhil Md Din
- Water Research Alliance, Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310, Malaysia.
| | - Yee Yong Lee
- Water Research Alliance, Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310, Malaysia.
| | - Mohanadoss Ponraj
- Water Research Alliance, Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310, Malaysia.
| | - Dilshan Remaz Ossen
- Department of Architecture, Faculty of Built Environment, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor, Malaysia.
| | - Kenzo Iwao
- Nagoya Institute of Technology, Incubation Cebter, Building 2, Room 622B, Gokiso-cho, Showa-ku, Nagoya-city, Aichi-Pref. 466-8555, Japan.
| | - Shreeshivadasan Chelliapan
- Water Research Alliance, Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310, Malaysia.
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Sathishkumar P, Mythili A, Hadibarata T, Jayakumar R, Kanthimathi MS, Palvannan T, Ponraj M, Salim MR, Mohd Yusoff AR. Laccase mediated diclofenac transformation and cytotoxicity assessment on mouse fibroblast 3T3-L1 preadipocytes. RSC Adv 2014. [DOI: 10.1039/c3ra46014b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Fulazzaky MA, Talaiekhozani A, Majid MZA, Ponraj M, Goli A. Evaluation of gas retention time effects on the bio-trickling filter reactor performance for treating air contaminated with formaldehyde. RSC Adv 2013; 3:17462. [DOI: 10.1039/c3ra41391h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
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