Browsing Environmental Science by Author "ETAL."
Now showing items 1-20 of 31
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3D printed feed spacers based on triply periodic minimal surfaces for flux enhancement and biofouling mitigation in RO and UF
Sreedhar, Nurshaun; Thomas, Navya; Ketan, Oraib Al; Rowshan, Reza; ETAL. (Elsevier, 2018-01)In this proof of concept study, 3D printed feed spacers with complex geometries based on triply periodic minimal surfaces (TPMS) were designed and tested in reverse osmosis (RO) and ultrafiltration (UF) processes. The ... -
3D printed photocatalytic feed spacers functionalized with β-FeOOH nanorods inducing pollutant degradation and membrane cleaning capabilities in water treatment
Sreedhar, Nurshaun; Kumar, Mahendra; Jitan, Samar Al; Thomas, Navya; ETAL. (Elsevier, 2022-01)A novel 3D printed photocatalytic feed spacer was developed for use in membrane-based water and wastewater filtration systems. The spacer fulfilled two new functions; degradation of membrane-permeating pollutants in the ... -
3D printed spacers based on TPMS architectures for scaling control in membrane distillation
Thomas, Navya; Sreedhar, Nurshaun; Ketan, Oraib Al-; Rowshan, Reza; ETAL. (Elsevier, 2019-07)In this study, the performance of novel 3D printed spacers was investigated for scaling control in direct contact membrane distillation (DCMD). The spacers, designed as triply periodic minimal surfaces (TPMS), were tested ... -
3D printed spacers for organic fouling mitigation in membrane distillation
Castillo, Erik Hugo Cabrera; Thomas, Navya; Ketan, Oraib Al; Rowshan, Reza; Al-Rub, Rashid K Abu; ETAL. (Elsevier, 2019-08)3D printing offers the flexibility to achieve favorable spacer geometrical modification. The role of 3D printed spacers for organic fouling mitigation in direct contact membrane distillation (DCMD) is evaluated. Compared ... -
3D printed triply periodic minimal surfaces as spacers for enhanced heat and mass transfer in membrane distillation
Thomas, Navya; Sreedhar, Nurshaun; Ketan, Oraib Al; Rowshan, Reza; ETAL. (Elsevier, 2018-10)3D printing is utilized to create different feed channel spacer designs aimed at enhancing the spacer performance specifically for membrane distillation (MD) application. The novelty is the use of mathematically developed ... -
An analysis of atmospheric pollutants concentration in urban area in Greece
Triantafyllou, AG; Patra, A; Zuburtikudis, Ioannis; ETAL. (2001-07)In this study continuous concentration measurements of atmospheric pollutants for a 3 year period are analyzed. These measurements have been carried out in the central area of Kozani (down town Kozani), the largest city ... -
Brine management in desalination industry: From waste to resources generation
Mavukkandy, Musthafa O; Chabib, Chahd M; Mustafa, Ibrahim; Ghaferi, Amal Al; ETAL. (Elsevier, 2019-12)Desalination brine has high salinity and contains various chemical contaminants and its disposal causes a major concern for desalination around the world. Environmentally friendly and economically feasible methods are ... -
CO2 absorption into aqueous ammonia using membrane contactors: Role of solvent chemistry and pore size on solids formation for low energy solvent regeneration
Bavarella, S; Luqmani, Ben; Thomas, Navya; Brookes, Adam; ETAL. (Elsevier, 2022-06)Solids formation can substanitally reduce the energy penalty for ammonia solvent regeneration in carbon capture and storage (CCS), but has been demonstrated in the literature to be difficult to control. This study examines ... -
Comparative antimicrobial activities of wild and cultivated varieties of Olea European different leaves extracts in Pakistan
Ahmad, Waqar; Khan, Hamayun; Siddique, Muhammad; ETAL. (Academy for Environment and Life Sciences, India, 2020)This research aims to find out the antimicrobial activities of the extracts of wild and cultivated varieties of Olive plants were screened for their antimicrobial activities against nine bacterial strains (six gram-positive, ... -
Comparative assessment of the effects of 3D printed feed spacers on process performance in MD systems
Thomas, Navya; Swaminathan, Jaichander; Zaragoza, Guillermo; Rub, Rashid K Abu Al; ETAL. (Elsevier, 2021-05)In this study, process enhancements achieved by the use of 3D printed feed spacers based on triply periodic minimal surfaces (TPMS) were comparatively assessed using the two most common membrane distillation (MD) configurations: ... -
Covalent surface entanglement of polyvinylidene fluoride membranes with carbon nanotubes
Gharabli, Samer Al; Kujawa, Joanna; Mavukkandy, Musthafa O; Agbaje, Taofeeqah A; ETAL. (Pergamon, 2018-03)Polyvinylidene fluoride (PVDF) membranes play a key role in several industrial applications. Tuning the properties of these membranes enables a sharp selectivity for the target application. The goal of this work is to ... -
Exploiting the interplay between liquid-liquid demixing and crystallization of the PVDF membrane for membrane distillation
Nawi, NIM; Bilad, MR; Nordin, NAHM; Mavukkandy, Musthafa O; Putra, ZA; ETAL. (Hindawi, 2018)Membrane distillation (MD) purifies water by transporting its vapor through a hydrophobic membrane. An ideal MD membrane poses high water flux and high fouling, scaling, and wetting resistances. In this study, we develop ... -
Fabrication of blend polyvinylidene fluoride/chitosan membranes for enhanced flux and fouling resistance
Baeza Elizalde, Cynthia Noemi; Gharabl, Samer Al; Kujawa, Joanna; Mavukkandy, Musthafa O; ETAL. (Elsevier, 2018-01)The fabrication of polyvinylidene fluoride (PVDF) membranes was studied using chitosan as a hydrophilic additive for flux enhancement and stability. Chitosan (CS) was blended with PVDF at 0.5, 1.0, 1.5, 2.0 and 2.5% (w/w) ... -
Feedstock Availability, Composition, New Potential Resources for Biohydrogen, Biomethane, and Biobutanol Production via Biotechnological Routes
Thomas, Navya; Mavukkandy, Musthafa O; Farrell, Eanna; Arafat, Hassan A; ETAL. (Springer International Publishing, 2017-03)Booming population, higher standard of living, and growing industrialization continue to exert a demand for energy. The continuous and unlimited use of fossil fuels to meet the growing energy demand would deplete the finite ... -
Fouling mechanisms in ultrafiltration under constant flux: Effect of feed spacer design
Sreedhar, Nurshaun; Mavukkandy, Musthafa O; Aminabhavi, Tejraj M; Hong, Seungkwan; ETAL. (Elsevier, 2020-09)The impact of feed spacer design on membrane fouling mechanism in ultrafiltration (UF) process under constant flux mode was systematically investigated. Thecombined intermediate pore blocking and cake filtration model was ... -
Hybrid NF and UF membranes tailored using quaternized polydopamine for enhanced removal of salts and organic pollutants from water
Ismail, Roqaya A; Kumar, Mahendra; Khanzada, Noman K; Thomas, Navya; ETAL. (Elsevier, 2022-10)In this work, a quaternized polydopamine (QSiPD) nanohybrid was synthesized via condensation reaction between the silicon hydroxyl moieties of the hydrolyzed QSiP and hydroxyl moieties of polydopamine (PDA) and applied for ... -
Impacts of feed spacer design on UF membrane cleaning efficiency
Sreedhar, Nurshaun; Ketan, Oraib Al; Rowshan, Reza; Rub, Rashid K Abu Al; Hong, Seungkwan; ETAL. (Elsevier, 2020-12)In this study, the impacts of three feed spacer design parameters; thickness, porosity and architecture, on the cleaning efficiency of ultrafiltration (UF) membranes were studied, both in backwash and relaxation cleaning ... -
Leaching of PVP from PVDF/PVP blend membranes: Impacts on membrane structure and fouling in membrane bioreactors
Mavukkandy, Musthafa O; Bilad, Muhammad R; Giwa, Adewale; Hasan, Shadi W; ETAL. (Springer US, 2016-05)Polyvinylidene fluoride (PVDF) membranes are widely used in membrane industry, especially for membrane bioreactors (MBRs). Many PVDF membranes contain residual polyvinyl pyrrolidone (PVP) that acts as a pore-forming additive. ... -
Mass transfer analysis of ultrafiltration using spacers based on triply periodic minimal surfaces: Effects of spacer design, directionality and voidage
Sreedhar, Nurshaun; Thomas, Navya; Ketan, Oraib Al; Rowshan, Reza; ETAL. (Elsevier, 2018-09)An ideal feed spacer balances high flux and low pressure drop while minimizing fouling. In this work, several feed spacer with complex triply periodic minimal surface (TPMS) geometries were designed and fabricated using ... -
Nanoporous hollow fiber polyethersulfone membranes for the removal of residual contaminants from treated wastewater effluent: Functional and molecular implications
Giwa, Adewale; Chakraborty, Sudip; Mavukkandy, Musthafa O; Arafat, Hassan A; ETAL. (Elsevier, 2017-12)Hollow fiber membranes consisting of polyethersulfone (PES) reformed with high proportions of single bondOH, aryl-N and alkyl-F groups in nonsolvent additives were compared for the removal of residual Cr (VI), COD, and ...