Ateş Üzülmez, Havva
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Ateş, H. Ates, Havva Ateş, Havva Ates Uzulmez, Havva A. Uzulmez, Havva A. Üzülmez, Havva Ateş Ü., Havva Ates Ü., Havva Ates Uzulmez, H. Ateş Üzülmez, H. Ates Üzülmez, Havva Ateş Uzulmez, H. Ates Üzülmez, H.
Job Title
Doç. Dr.
Email Address
hates@ktun.edu.tr
Main Affiliation
02.06. Department of Environmental Engineering
Status
Current Staff
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Research Topics
Domains
Physical SciencesHealth Sciences
Fields
Environmental ScienceEngineeringMedicine
Subfields
PollutionBiomedical EngineeringWater Science and TechnologyBiochemistry
Specific Research Areas
Pharmaceutical and Antibiotic Environmental Impacts
Subcritical and Supercritical Water Processes
Advanced oxidation water treatment
Environmental remediation with nanomaterials
Phytochemicals and Antioxidant Activities
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
1
Research Products
3GOOD HEALTH AND WELL-BEING
3
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
15
Research Products
7AFFORDABLE AND CLEAN ENERGY
0
Research Products
8DECENT WORK AND ECONOMIC GROWTH
1
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
5
Research Products
10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
6
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
5
Research Products
13CLIMATE ACTION
0
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14LIFE BELOW WATER
1
Research Products
15LIFE ON LAND
1
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
0
Research Products
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Publication Collaboration
| Affiliation Name | Count |
|---|---|
| Konya Technical University | 21 |
| Selçuk University | 12 |
| Karamanoğlu Mehmetbey University | 4 |
| Bursa Technical University | 1 |
| Konya Food and Agriculture University | 1 |
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Data obtained from OpenAlex
Scholarly Output
22
Articles
19
Views / Downloads
77/65
Supervised MSc Theses
2
Supervised PhD Theses
1
WoS Citation Count
354
Scopus Citation Count
401
Patents
0
Projects
0
WoS Citations per Publication
16.09
Scopus Citations per Publication
18.23
Open Access Source
7
Supervised Theses
3
| Journal | Count |
|---|---|
| Science of the Total Environment | 2 |
| SCIENCE OF THE TOTAL ENVIRONMENT | 2 |
| Process Safety and Environmental Protection | 2 |
| Environmental Research and Technology | 1 |
| Journal of Cleaner Production | 1 |
Current Page: 1 / 4
Scopus Quartile Distribution
Competency Cloud
22 results
Scholarly Output Search Results
Now showing 1 - 10 of 22
Article Removal of Pharmaceutically Active Compounds From Hospital Wastewater by Ozonation Pretreatment(Yildiz Technical University, 2025-09-30) Mansimli, Mahammad; Ates, H.Hospital wastewater includes many pharmaceutically active compounds (PhACs). Since this resulted in both PhACs distribution to the environment and development of antibiotic resistance in microorganisms, on-site treatment of hospital wastewater has gained importance. In this study, the removal of 21 PhACs consisting of 12 parent compounds and 9 main metabolites from hospital wastewater by ozonation was investigated. In this context, commonly used analgesics (Paracetamol, Diclofenac, Ibuprofen, and Naproxen, 4'-Hydroxydiclofenac, 5-Hydroxydiclofenac, 1-Hydroxyibuprofen, 2-Hydroxyibuprofen, Carboxyibuprofen, (S)-O-Desmethyl naproxen) and antibiotics (Ciprofloxacin, Sulfamethoxazole, Trimethoprim, Erythromycin, Metronidazole, Clarithromycin, Azithromycin, Clindamycin, N-Acetyl-Sulfamethoxazole, Sulfamethoxazole-β-D-Glucuronide, Clindamycin sulfoxide) were selected. PhAC analyses were performed by HPLC/MS-MS. The ozonation dose was between 0.05-5.0 mg O₃/mg COD. In real hospital wastewater, many of the selected PhACs were detected and total analgesic and antibiotic were determined as 22.9 and 40.6 µg/L, respectively. The results showed that detected PhACs were completely removed at 1.5 mg O<inf>3</inf>/mg COD. Sulfamethoxazole was degraded at the lowest dose of ozone (0.05mg O<inf>3</inf>/mg COD), while Ciprofloxacin and 2-Hydroxy ibuprofen were relatively resistant to non-stoichiometric doses of ozone. The removal efficiencies of Ciprofloxacin and 2-Hydroxy ibuprofen were determined as 77% and 37%, respectively, at 0.5 mg O<inf>3</inf>/mg COD. Additionally, COD removal was 48% at 1.5 mg O<inf>3</inf>/mg COD. As a result, pre-oxidation of hospital wastewater can be an effective method for on-site pretreatment of PhACs. © This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).Article Citation - WoS: 50Citation - Scopus: 55Advanced Oxidation of Landfill Leachate: Removal of Micropollutants and Identification of By-Products(ELSEVIER, 2021-07-01) Ateş, Havva; Argun, Mehmet EminLandfill leachate contains several macropollutants and micropollutants that cannot be removed efficiently by conventional treatment processes. Therefore, an advanced oxidation process is a promising step in post or pre-treatment of leachate. In this study, the effects of Fenton and ozone oxidation on the removal of 16 emerging micropollutants including polycyclic aromatic hydrocarbons (PAHs), phthalates, alkylphenols and pesticides were investigated. The Fenton and ozone oxidation of the leachate were performed with four (reaction time: 20-90 min, Fe(II) dose: 0.51-2.55 g/L, H2O2 dose: 5.1-25.5 g/L and pH: 3-5) and two (ozonation time: 10-130 min and pH: 4-10) independent variables, respectively. Among these operating conditions, reaction time played more significant role (p-value < 0.05) in eliminating di-(2-Ethylhexyl) phthalate, 4-nonylphenol and 4-tert-octylphenol for both processes. The results showed that Fenton and ozone oxidation processes had a high degradation potential for micropollutants except for the PAHs including four and more rings. Removal efficiencies of micropollutants by ozone and Fenton oxidation were determined in the range of 5-100%. Although the removal efficiencies of chemical oxygen demand (COD) and some micropollutants such as phthalates were found much higher in the Fenton process than ozonation, the degradation products occurred during the Fenton oxidation were a higher molecular weight. Moreover, the oxidation intermediates for the both processes were found as mainly benzaldehyde, pentanoic acid and hydro cinnamic acid as well as derivatives of naphthalenone and naphthalenediol. Also, acid ester with higher molecular weight, naphthalene-based and phenolic compounds were detected in the Fenton oxidation.Article Citation - WoS: 11Citation - Scopus: 13Fate of Phthalate Esters in Landfill Leachate Under Subcritical and Supercritical Conditions and Determination of Transformation Products(Elsevier Ltd, 2023-01-01) Ateş, Havva; Argun, Mehmet EminThe hypothesis of this study is that the complex organic load of landfill leachate could be reduced by supercritical water oxidation (SCWO) in a single stage, but this operation could lead to the formation of some undesired by-products of phthalate esters (PAEs). In this context, the fate of selected PAEs, butyl benzyl phthalate (BBP), di-2-ethylhexyl phthalate (DEHP) and di-n-octyl phthalate (DNOP), was investigated during the oxidation of leachate under subcritical and supercritical conditions. Experiments were conducted at various temperatures (250–500 °C), pressures (10–35 MPa), residence times (2–18 min) and dimensionless oxidant doses (DOD: 0.2–2.3). The SCWO process decreased the leachate's chemical oxygen demand (COD) from 34,400 mg/L to 1,120 mg/L (97%). Removal efficiencies of DEHP and DNOP with longer chains were higher than BBP. The DEHP, DNOP and BBP compounds were removed in the range of −35 to 100%, −18 to 92%, and 28 to 36%, respectively, by the SCWO process. Many non-target PAEs were qualitatively detected in the raw leachate apart from the selected PAEs. Besides, 97% of total PAEs including both target and non-target PAEs was mineralized at 15 MPa, 300 °C and 5 min. Although PAEs were highly mineralized during SCWO of the leachate, aldehyde, ester, amide and amine-based phthalic substances were frequently detected as by-products. These by-products have transformed into higher molecular weight by-products with binding reactions as a result of complex SCWO process chemistry. It has also been determined that some non-target PAEs such as 1,2-benzenedicarboxylic acid bis(2-methylpropyl)ester and bis(2-ethylhexyl) isophthalate can transform to the DEHP. Therefore, the suggested pathway in this study for PAEs degradation during the SCWO of the leachate includes substitution and binding reactions as well as an oxidation reaction. © 2022 Elsevier LtdArticle Citation - WoS: 34Citation - Scopus: 41Investigation of Micropollutants Removal From Landfill Leachate in a Full-Scale Advanced Treatment Plant in Istanbul City, Turkey(ELSEVIER, 2020-12-01) Argun, Mehmet Emin; Akkuş, Mehmet; Ateş, HavvaAlthough the levels of micropollutants in landfill leachate and municipal wastewater are well-established, the individual removal mechanisms and the fate of micropollutants throughout a landfill leachate treatment plant (LTP) were seldom investigated. Therefore, the determination of the removal efficiencies and the fates of micropollutants in a full-scale leachate treatment plant located in the largest city of Turkey were aimed in this study. Some important processes, such as equalization pond, bioreactor, ultrafiltration (UF) and nanofiltration (NF), are being operated in the treatment plant. Landfill leachatewas characterized as an intense pollution source of macro and micropollutants compared to other water types. Chemical oxygen demand (COD), NH3, suspended solids (SS) and electrical conductivity (EC) values of the landfill leachate (and their removal efficiencies in the treatment plant) were determined as 18,656 +/- 12,098 mg/L (98%), 3090 +/- 845 mg/L (99%), 4175 +/- 1832 mg/L (95%) and 31 +/- 2 mS/cm (51%), respectively. Within the scope of the study, the most frequently and abundantly detected micropollutants in the treatment plant were found as heavy metals (8 +/- 1.7 mg/L), VOCs (38 +/- 2 mu g/L), alkylphenols (9 +/- 3 mu g/L) and phthalates (8 +/- 3 mu g/L) and the overall removal efficiencies of these micropollutants ranged from -11% to 100% in the treatment processes. The main removal mechanism of VOCs in the aerobic treatment process has been found as the volatilization due to Henry constants greater than 100 Pa.m(3)/mol. However, the molecular weight cut off restriction of UF membrane has caused to less or negative removal efficiencies for some VOCs. The biological treatment unit which consists of sequential anoxic and oxic units (A/O) was found effective on the removal of PAHs (62%) and alkylphenols (87%). It was inferred that both NO3 accumulation in anoxic reactor, high hydraulic retention time (HRT) and sludge retention time (SRT) in aerobic reactor provide higher biodegradation and volatilization efficiencies as compared to the literature. Membrane processes were more effective on the removal of alkylphenols (60-80%) and pesticides (59-74%) in terms of influent and effluent loads of each unit. Removal efficiencies for Cu, Ni and Cr, which were the dominant heavy metals, were determined as 92, 91 and 51%, respectively and the main removal mechanism for heavy metals has thought to be coprecipitation of suspended solids by microbial biopolymers in the bioreactor and the separation of colloids during membrane filtration. Total effluent loads of the LTP for VOCs, semi volatiles and heavymetalswere 1.0 g/day, 5.2 g/day and 1.5 kg/day, respectively. It has been concluded that the LTP was effectively removing both conventional pollutants and micropollutants with the specific operation costs of 0.27 $/(kg of removed COD), 0.13 $/(g of removed VOCs), 0.35 $/(g of removed SVOCs) and 2.6 $/(kg of removed metals). (C) 2020 Elsevier B.V. All rights reserved.Article Citation - WoS: 36Citation - Scopus: 42Removal of Pahs From Leachate Using a Combination of Chemical Precipitation and Fenton and Ozone Oxidation(IWA PUBLISHING, 2018-08-28) Ateş, Havva; Argun, Mehmet EminIn this study, six emerging pollutants, belonging to the polycyclic aromatic hydrocarbons (PAHs) group, found in landfill leachate were investigated for their removal by sequential treatment processes including chemical precipitation (CP), Fenton oxidation (FO) and ozone oxidation (OO). Each treatment process was run under different conditions using an experimental design program. Optimization of both CP and FO processes was designed based on the measured values of the residual chemical oxygen demand (COD) of the samples analyzed. The analysis of variance test was applied to the obtained results for determination of statistical significance of the model. Removal efficiencies of micropollutants were determined in the optimal conditions both for CP and FO processes. Samples obtained after these processes were treated with different pH and ozonation times for observing the performances of ozonation on micropollutant removal under different operating conditions. In this study, the removal of acenaphthylene, acenaphthene, fluorene, phenanthrene, fluoranthene and pyrene micropollutants was investigated. The values obtained for PAHs in leachate were determined to be above 10 ppb. In the CP process, the removal efficiencies for PAHs were ranged between 6% and 40% except for pyrene. Removal efficiencies of all micropollutants with FO were over 70% except for fluorene (55%). The removal efficiencies of the investigated micropollutants were 80-100% as a result of consecutive treatment processes including CP, FO and OO respectively.Article İleri Biyolojik Atıksu Arıtma Tesisi ve Membran Prosesler ile Fitalat Ester Grubu Mikrokirletici (bbp ve Dnop) Giderimi(2019) Nas, Bilgehan; Nas, Kaan Batuhan; Argun, Mehmet Emin; Yel, Esra; Koyuncu, Serdar; Ateş, Havva; Dolu, Taylan; Dinç, Saliha; Kara, MeryemMikrokirleticiler (MK) veya öncelikli kirleticiler organik veya inorganik, düşük konsantrasyonlarda çevreye ve insan sağlığına önemli etkileri olan kirleticilerdir. Toksik özellikleri, kanserojenik ve endokrin bozucu etkileri ve çevrede neden oldukları olumsuz etkiler göz önüne alınarak birçok ülkede, MK gruplarından fitalat esterlerin (FE) kullanımına sınırlamalar hatta yasaklamalar getirilmiştir. Su kütlelerindeki FE‟lerin önemli kaynaklarından biri de evsel/kentsel atıksulardır. Bu çalışmada, 200.000 m3 /gün kapasiteli ileri biyolojik atıksu arıtma tesisinde ve membran proseslerden oluşan pilot ölçekli tesiste FE‟lerden benzil bütil fitalat (BBP) ve di-n-oktil fitalat (DnOP)‟ın mevcudiyeti, seviyesi ve giderimi 1 yıl süre ile araştırılmıştır. Membran prosesler; ultrafiltrasyon (UF), nanofiltrasyon (NF) ve ters ozmoz (RO) ünitelerinden oluşmaktadır ve 90 m3 /gün kapasitelidir. BBP için biyolojik AAT ile %19,2 ve membran tesis ile RO çıkışında %71,6 giderim verimi elde edilirken, DnOP için biyolojik AAT‟de %44,2 membran tesiste %70,2 giderim verimi elde edilmiştir.Article Citation - WoS: 36Citation - Scopus: 43Comparison of Advanced Biological Treatment and Nature-Based Solutions for the Treatment of Pharmaceutically Active Compounds (phacs): a Comprehensive Study for Wastewater and Sewage Sludge(ELSEVIER, 2021-07-01) Nas, Bilgehan; Dolu, Taylan; Argun, Mehmet Emin; Yel, Esra; Ateş, Havva; Koyuncu, Serdar; Ate, HavvaPassing of pharmaceutical residues into environment in an uncontrolled manner as a result of continuous increase in drug consumption across the globe has become a threatening problem for the ecosystems and almost all living creatures. In this study, diclofenac (DCF), carbamazepine (CBZ), 17 beta-estradiol (17 beta-E2) and 17 alpha ethynylestradiol (EE2) belonging to different therapeutic classes were investigated simultaneously in advanced biological treatment and nature-based treatments during 12-months sampling campaign. In this context, behavior patterns of pharmaceutically active compounds (PhACs) throughout the both wastewater and sludge lines in advanced biological wastewater treatment plant (WWTP), wastewater stabilization pond (WSP) and constructed wetland (CW) were discussed in detail based on each treatment processes seasonally. Furthermore, statistically evaluated data obtained in full-scale WWTPs were compared with each other in order to determine the valid removal mechanisms of these pharmaceutical compounds. While DCF and CBZ were detected very intensively both in the wastewater and sludge lines of the investigated WWTPs, steroid hormones,17 beta-E2 and EE2, were determined below the LOQ value in general. Annual average removal efficiencies achieved in studied WWTPs for DCF ranged between & minus;23.3% (in CW) and 75.2% (in WSP), while annual average removal rates obtained for CBZ varied between & minus;20.7% (in advanced biological treatment) and 10.0% (in CW). It has been found that DCF was highly affected by different wastewater treatment processes applied in the WWTPs compared to CBZ which showed extraordinary resistance to all different treatment processes. Although calculated in different rates for each compounds, biodegradation/biotransformation and sorption onto sewage sludge were determined as the main removal mechanisms for PhACs in plants. Although showed a similar behavior in the sludge dewatering unit (decanter) present in the advanced biological WWTP, quite different behaviors ob-served in the anaerobic digester for DCF (up to 15% decrease) and CBZ (up to 95% increase). Sorption and desorp-tion behaviors of DCF and CBZ were also evaluated in the sludge treatment processes found in advanced biological WWTP. Percentages of originated extra annual average of pharmaceutical loads were calculated as 0.64% and 0.90% for DCF and CBZ, respectively in the advanced biological WWTP due to the sidestream caused by the sludge dewatering unit. (c) 2021 Elsevier B.V. All rights reserved.Article Citation - WoS: 18Citation - Scopus: 19A Holistic Approach To the Recovery of Valuable Substances From the Treatment Sludge Formed From Chemical Precipitation of Fruit Processing Industry Wastewater(Elsevier B.V., 2024-03-01) Güven, H.M.; Ateş, H.In this study, recovery of phenolic substances with Soxhlet extraction, (SE) ultrasound-assisted extraction (UAS), and supercritical CO2 (SC-CO2) extraction methods from chemical sludge obtained with chemical precipitation (FeCl3/PACS, Ca(OH)2/PACS, perlite/PACS, FeCl3/cationic polyelectrolyte) of lemon processing wastewater was investigated. The effect of used coagulants/flocculants and pH on COD and total phenolic substance content (TPC) removal was researched. Recovered phenolic substance profiles were also determined with HPLC-DAD. Additionally, response surface methodology was used to determine optimum treatment conditions. ANOVA analysis showed that pH is a more important variable than coagulant/flocculant doses for all chemical precipitation experimental sets. The highest removal efficiencies for COD and TPC was obtained in FeCl3/PACS (COD: 72.0 %, TPC: 93.7 %). Optimum dose values were determined as pH: 4, FeCl3: 3000 mg/L, PACS: 400 mg/L for FeCl3/PACS, pH: 6.5, Ca(OH)2: 1500 mg/L, PACS: 300 mg/L for Ca(OH)2/PACS, pH: 5.5, PACS: 7000 mg/L, perlite: 50 g/L for perlite/PACS, pH: 4.5, FeCl3: 500 mg/L, polyelectrolyte: 4 mg/L for FeCl3/polyelectrolyte. TPC removal efficiencies were determined as 55 %, 35 %, 57 % and 58 % in these conditions, respectively. Maximum TPC in extracts was determined as 39.03 mg GAE/g extract, 8.81 mg GAE/g extract, and 4.34 mg GAE/g extract for SE, UAS, and SC-CO2, respectively. TPC recovery efficiencies (RTPC) for all chemical sludge were SE > UAS > SC-CO2. Additionally, the TPC profile has shown a difference depending on the extraction method. According to the results of this study, it was concluded that the coagulation-flocculation process may be a suitable alternative for fruit juice processing industry wastewater in terms of both reducing environmental pollution and recovering polyphenolics from formed sludge. Consequently, this study presented a different perspective on the recovery from wastes with valuable substance recovery from chemical sludge. © 2024 Elsevier B.V.Article Citation - WoS: 39Citation - Scopus: 44Recovery of Valuable Compounds From Orange Processing Wastes Using Supercritical Carbon Dioxide Extraction(Elsevier Sci Ltd, 2022-11-01) Argun, Mehmet Emin; Argun, Mustafa Samil; Arslan, Fatma Nur; Nas, Bilgehan; Ateş, Havva; Tongur, Suheyla; Çakmakcı, ÖzgürCitrus processing industries produce high volumes of wastewater containing significant polluting loads for the environment, many of which are functional bioactive compounds. In this study, it was aimed to recover valuable bioactive components by supercritical CO2 extraction from orange processing wastes. For this purpose, an optimization study was carried out using the response surface methodology (RSM) in terms of pressure and temperature. The optimum experimental conditions were found to be 28.7 MPa and 60 degrees C for maximum extract yield, total phenolics content, total flavonoids content and antioxidant activity values. It was determined that some valuable phenolic compounds such as hesperetin, quercetin, apigenin, cyanidin, p-coumaric acid, ferulic acid, sinapic acid, isorhamnetin and their derivatives have been increased between 2 and 260 times in the ex-tracts by supercritical CO2 extraction. Another important finding of this study was that short and medium chain saturated fatty acids were detected in the wastewater extracts while longer chain fatty acids were detected in the orange peel extracts. This may be due to the fact that more soluble short-chain fatty acids are transferred from the fruit to the juice during fruit processing.Article Occurrence, Distribution, and Fate Evaluation of Endocrine Disrupting Compounds in Three Wastewater Treatment Plants With Different Treatment Technologies in Türkiye(Elsevier B.V., 2024-11-01) Nas, B.; Dolu, T.; Ateş, H.; Dinç, S.; Kara, M.; Argun, M.E.; Yel, E.Nowadays, two of the endocrine disrupting compounds (EDCs) in the group of alkylphenols (APs), nonylphenol (4-NP) and octylphenol (4-t-OP), have attracted great scientific and regulatory attention mainly due to concerns about their aquatic toxicity and endocrine disrupting activity. This paper investigated the occurrence, distribution behavior, fate, and removal of 4-NP and 4-t-OP in liquid and solid phases of three full-scale wastewater treatment plants (WWTPs) with different treatment technologies comparatively. In this context, (i) advanced biological WWTP, (ii) wastewater stabilization pond (WSP), and (iii) constructed wetland (CW) were utilized. In all three investigated WWTPs, the concentrations of 4-NP (219.9–19,354.4 ng/L) in raw wastewater were higher than those of 4-t-OP (13.9–2822.4 ng/L). Within the scope of annual average removal efficiencies, 4-NP was treated highly in advanced biological WWTP (93.5 %), while it was almost not treated in WSP (3.1 %) and treated with negative removal (<0 %) in CW. While 4-t-OP was treated at a similar removal rate (93.5 %) to 4-NP in advanced biological WWTP, it was treated moderately in WSP (52.5 %) and very poorly in CW (12.4 %). It has been determined that the most important removal mechanism of both 4-NP and 4-t-OP in WWTPs is biodegradation, followed by sorption onto sewage sludge. According to the mass balance performed in advanced biological WWTP, the biodegradation rates for 4-NP and 4-t-OP were found to be 70.4 % and 86.6 %, respectively, while the sorption onto sewage sludge were determined to be 23.3 % and 6.8 %. One of the critical findings obtained within the scope of the study is that while the concentrations of both metabolites, especially 4-NP, in wastewater and sewage sludge, decreased considerably under aerobic conditions, on the contrary, their concentrations increased significantly under anaerobic conditions. Both compounds were detected at higher concentrations in primary sludge compared to secondary sludge in advanced biological WWTP, while in WSP, they were determined at higher concentrations in anaerobic stabilization pond sludge compared to facultative stabilization pond sludge. Besides, it was also determined that the sorption behavior of these alkylphenols is much more dominant than desorption. © 2024 Elsevier B.V.
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