Person: ERKEN, ESRA
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ERKEN
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ESRA
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Publication Metadata only Assessment of green tea-enabled iron/calcined bentonite nanocomposites for phosphate removal and recovery(2022-10-01) ERKEN, ESRA; Hür C., ERKEN E.© 2022 Elsevier Ltd.We suggest using green tea enabled iron nanoparticles supported on calcined bentonite (G-nZVI/B) to remove and recover phosphate from synthetic wastewater. The nanocomposites are proposed as an eco-innovative adsorbent material for wastewater treatment plants. Adsorption columns packed with this novel nanocomposite would help overcome the footprint obstacle of wastewater treatment plants in a cost-effective way. We assessed the effect of various iron (Fe) /calcined bentonite (Cal-B) mass ratios (2 g Cal-B/2 g Fe, 2 g Fe, 2 g Cal-B/0.56 g Fe) and Fe/Green tea extract (GT) volumetric ratios (1/1, 1/0.5, 1/0.1) in 9 different nanocomposites (G-nZVI/B). The nanocomposites were characterized using BET, SEM, TEM, FT-IR, XRD, and XPS. The recipe for the optimized nanocomposite composition was found as follows: NC2 (Fe: 2 g, Calcined bentonite: 2 g, Fe/Green tea extract: (1/0.5) (V/V)). TEM analysis demonstrated that size of the iron nanoparticles (INPs) was within the range of 8-30 nm for NC2. Adsorption isotherms and kinetic models were carried out with the optimized nanocomposite under the following conditions: Room temperature; adsorbent dosage = 5 g/L; initial phosphate concentration: 10-900 mg/L, and contact time = 5-1500 min. The results revealed that the maximum adsorption capacity was 58.60 mg/g using Sips model (R2 = 0.959), and the adsorption rate constant was 23.017 mg/(g.min) using Elovich model (R2 = 0.971). Chemisorption was suggested to be the major mechanism of phosphate removal from an aqueous solution. The adsorption and recovery efficiencies were determined to be 98.60% and 53.48% using 1 g of NC2 with 50 mg/L initial phosphate concentration.Publication Metadata only Atıksu bazlı epidemiyoloji çalışmaları ile covid-19 yayılımının incelenmesi(Tarım ve Orman Bakanlığı Türkiye Su Enstitüsü, 2022-02-01) KOCAMEMİ, BİLGE; ERKEN, ESRA; Kocamemi B., Erken E.Bu yayın, atıksu bazlı epidemiyoloji kavramını tanıtmak ve bu kapsamda SUEN koordinasyonunda ülkemiz genelinde yürütülen "Covid-19 yayılımının atıksularda SARS-CoV-2 analizleri ile takibi" çalışmalarının metodolojisi ve çalışmalar kapsamında edinilen bilgi ve tecrübeyi yerli ve yabancı uzmanlarla paylaşmak üzere hazırlanmıştır.Publication Metadata only Nationwide tracking of covid-19 spread by wastewater based epidemiology (WBE)(Ministry of Agriculture and Forestry of Republic of Turkiye -Turkish Water Institute, 2022-02-01) KOCAMEMİ, BİLGE; ERKEN, ESRA; Kocamemi B., Erken E.Publication Metadata only Atıksular ve atıksu çamurları ile covid 19 takibi: Türkiye örneği(2021-01-01) KOCAMEMİ, BİLGE; ERKEN, ESRA; Kocamemi B., Kurt H., Erken E., Saatci A. M.