Browsing Environmental Science by Author "Sreedhar, Nurshaun"
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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 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 ... -
The evolution of feed spacer role in membrane applications for desalination and water treatment: A critical review and future perspective
Sreedhar, Nurshaun; Thomas, Navya; Ghaffour, Noreddine; Arafat, Hassan A (Elsevier, 2023-03)The membrane research community has witnessed a significant research growth on feed spacers since 2010, both in quantity and scope. Increasingly novel spacer geometries and spacer chemistries are being reported in literature ... -
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 ... -
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 ... -
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 ... -
Polydopamine-coated graphene oxide nanosheets embedded in sulfonated poly (ether sulfone) hybrid UF membranes with superior antifouling properties for water treatment
Kumar, Mahendra; Sreedhar, Nurshaun; Thomas, Navya; Mavukkandy, Musthafa O; ETAL. (Elsevier, 2022-04)A novel high-performance hybrid ultrafiltration (UF) membrane was fabricated by blending polydopamine-coated graphene oxide (PDGO) nanosheets with sulfonated poly(ether sulfone) (SPES) via phase inversion method and tested ... -
Polydopamine-coated graphene oxide nanosheets embedded in sulfonated poly(ether sulfone) hybrid UF membranes with superior antifouling properties for water treatment
Kumar, Mahendra; Sreedhar, Nurshaun; Thomas, Navya; Mavukkandy, Musthafa; ETAL. (Elsevier, 2022-04)A novel high-performance hybrid ultrafiltration (UF) membrane was fabricated by blending polydopamine-coated graphene oxide (PDGO) nanosheets with sulfonated poly(ether sulfone) (SPES) via phase inversion method and tested ...