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The present study is aimed to define how the COVID-19 pandemic was perceived amongst the primary school children by the pictures they did. The study group, in which the qualitative research method was used, included 241 first grade students in a primary school in the Antalya Kepez region, which was selected by the convenient sampling method. While collecting data in the research, students were asked "what do you understand when the COVID-19 is mentioned?" and to draw a picture of their feelings. The data were evaluated as a percentage (%) and frequency with the SPSS program. In the conclusion of the study, it was observed that most of the students in the study group perceived the COVID-19 as "an insect", and less of the students perceived it as "a disease". COVID-19 pandemic is drawn by the children generally as a free time activity at home.

Bu çalışmada bir non-iyonik yüzey aktif madde olan NP-10 (Tergitol) ile çalışılmış ve 100 mg/L olarak hazırlanan çözelti sistem optimizasyonu için UV-C/H2O2 prosesi gereğince seçilen farklı konsantrasyonlarda H2O2'ye bağlı olarak (10, 20 ve 100 mg/L) 80 dakikalık bir reaksiyona maruz bırakılmıştır. 10, 20 ve 100 mg/L H2O2 eklenmesine bağlı olarak reaksiyon sonu elde edilen giderim yüzdeleri deiyonize su için sırası ile 88,21; 96,99 ve 97,96 iken kentsel atıksu tesisinden temin edilen atıksu içinse 84,23; 98,46 ve 99,16 olarak bulunmuştur. H2O2 giderim verimleri hesaplanmıştır ve akabinde reaksiyon sonucu maksimum konsantrasyon olan 100 mg/L H2O2 için giderim verimi % 60,66 olarak bulunmuştur. Aynı deneysel koşullar UV-A lambası kullanılarak tekrarlanmış ve UV-A lambanın mineralizasyona ulaşmada yetersiz kaldığı görülmüştür. Radikal tutucu olarak NaCl, Na2SO4, Na2CO3, KH2PO4 ve fitalat çözeltileri ile UV-C/100 mg/L H2O2 prosesi tekrarlanmış ve sadece fitalatın sürükleme/radikal tutma etkisi gösterdiği görülmüştür. Ekotoksikoloji testleri ise Daphnia Magna (Crostacium), Vibrio Fischieri( Bakteri) ve Raphidocelis (Alg) üzerinde yapılmış ve sonuç olarak en hassas türün Daphnia Magna olduğu tespit edilmiştir. In this study, a nonionic surfactant which is called NP-10 (Tergitol) has been studied and 100 mg/L solution was prepared; for system optimization UV-C/H2O2 process was applied during 80 minutes with different concentrations of H2O2 (10, 20 and 100 mg/L). Depending on the addition of 10, 20 and 100 mg/L H2O2, the removal of NP-10 with deionized water is obtained as 88,21; 96,99 and 97,96 percent respectively. Instead, same experimental conditions were applied on urban wastewater and removal results were arrived %84,23; %98,46 and % 99,16. According to experimental analysis, it is resulted that UV-A lamp is not enough for mineralization. Hydroxyl scavengers study was carried out with NaCl, Na2SO4, Na2CO3, KH2PO4 and phatalate. Between these chemicals, just phatalat showed radical scavengers effect. Ecotoxicology tests were conducted on Daphnia Magna (Crostacium), Vibrio Fischieri (Bacteria) Raphidocelis (Alga). As result of these experiments Daphnia Magna was found the most sensitive species for the toxic effect. 89

Nonylphenol ethoxylated (NPEOs) nonionic surfactants have been increasingly used in different industrial, commercial and domestic applications. Unfortunately, they are classified as endocrine disrupting chemicals (and also considered as contaminants of emerging concern) having adverse effects on animal and human reproduction. The treatment of nonylphenol-decaethoxylated (NP-10) via H2O2/UV-C process at different reaction times (5, 10, 20, 40, 80 min) and H2O2 concentrations was investigated. After 80 min treatment the removal rates of NP-10 solution (initial concentration 100 mg/L) in deionized water were 88%, 97% and 98% for 10, 20 and 100 mg/L of H2O2 respectively. The same experimental conditions were applied to real wastewater spiked with 100 mg/L of NP-10 showing the following removal rates: 84%, 98% and 99%, respectively. The possible contribution of different radicals to NP-10 degradation by H2O2/UV-C treatment was investigated by evaluating the effect of different radical scavengers (namely NO3−, NaCl, Na2SO4, Na2CO3, KH2PO4 and phatalate). Toxicity data (Aliivibrio fischeri, Raphidocelis subcapitata and Daphnia magna) on treated solutions and wastewater highlighted the presence of residual toxicity in all samples evidencing that no complete mineralization occurred.