Nuray Işık Kabdaşlı

Nuray Işık Kabdaşlı
Istanbul Technical University · Department of Environmental Engineering

PhD on Environmental Engineering

About

128
Publications
25,544
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2,743
Citations
Additional affiliations
September 1988 - present
Istanbul Technical University
Position
  • Professor (Full)

Publications

Publications (128)
Article
Full-text available
Nitrate is a widespread water contaminant that can pose environmental and health risks. Various conventional techniques can be applied for the removal of nitrate from water and wastewater, such as biological denitrification, ion exchange, nanofiltration, and reverse osmosis. Compared to traditional methods, the chemical denitrification through zero...
Article
Full-text available
The impact of nutrients on the environment, particularly on water bodies, has led to extensive studies for nutrient control. Within this context, studies have been focused on source separation of human urine from domestic wastewater to recover nutrients. Potassium is one of the most important components of human urine. However, data on potassium re...
Article
Full-text available
The study explored the merit of chemically enhanced biodegradation of high organic matter as a sustainable treatment scheme for industrial wastewaters. For this purpose, an integrated, chemically enhanced activated sludge configuration was tested for confectionary effluents with a COD level of around 10.000 mg L-1. In this configuration, chemical s...
Preprint
The impact of nutrients on the environment, particularly on water bodies, has led to extensive studies for nutrient control. Within this context, studies have been focused on source separation of human urine from domestic wastewater to recover nutrients. Potassium is one of the most important components of human urine. However, data on potassium re...
Article
Full-text available
Wastewater-based epidemiology (WBE) has a long history of identifying a variety of viruses from poliovirus to coronaviruses, including novel Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). The presence and detection of SARS-CoV-2 in human feces and its passage into the water bodies are significant public health challenges. Hence, the...
Article
The present study focused on the usability of scallop shell coated Fe2O3 nanoparticles as an eco-friendly new absorbent in the treatment of tetracycline (TC). The process performance in terms of TC removal was investigated at different operating conditions i.e. at solution pH of 7-11, Fe2O3-scallop dosage of 0.1- 0.6 g L⁻¹, initial TC content of 20...
Article
Upon the outbreak of COVID-19 pandemic, detection and quantification of SARS-CoV-2 genetic material in domestic wastewater have led to an increase in the efforts to define and implement the wastewater-based epidemiology (WBE). This application provides valuable information to define local contamination monitoring, emergence of COVID-19 and its vari...
Article
In the present study, the treatment of carpet cleaning wastewater was optimized for electrocoagulation-flotation (ECF) followed sedimentation. In the experimental study, an ECF reactor equipped with four monopolar, parallel-connected aluminum electrodes was utilized. For the optimization, the process variables were selected as methylene blue active...
Article
Full-text available
Fluoride ions present in drinking water are beneficial to human health when at proper concentration levels (0.5-1.5 mg L −1), but an excess intake of fluoride (>1.5 mg L −1) may pose several health problems. In this context, reducing high fluoride concentrations in water is a major worldwide challenge. The World Health Organization has recommended...
Article
In this study, sulfate radical-based oxidation of an alcohol ethoxylate (AE) was explored by persulfate (PS)/UV-C process. Poly(oxyethylene)(4)laurylether, commercially known as Brij30®, was used as a model AE. (PS)/UV-C oxidation of aqueous Brij30® (8–20 mg/L) was performed at initial PS concentrations varying between 0.50 and 6.50 mM and at initi...
Conference Paper
Full-text available
In this paper, experimental studies were conducted for the removal of fluoride by electrocoagulation process using aluminium electrodes and with synthetic samples. The purpose of the study was to investigate the removal potential of fluoride on the electrodes rather than onto the sludge. Fluoride removal via accumulation on the electrode is carried...
Article
Several physico-chemical treatment methods such as membrane processes, air stripping, ion exchange , and electrochemical oxidation are addressed for the recovery of nutrients from source separated human urine, among them, chemical precipitation is a promising one since the nutrients are effectively transformed into solid phase which can directly be...
Article
In this study characterization and biological treat-ability of tablet production wastewaters of a pharmaceutical industry were assessed. Source-based wastewater characterization of tablet, pastille, effervescent tablets and chewing tablet productions indicated variable strength of wastewaters with COD values between 1030 and 6700 mg/L. Biological t...
Article
Full-text available
Heavy metals are among the most important pollutants due to their effects on living organisms. While hydroxide precipitation is the most common, efficient and practical method for the control of heavy metals, its performance is not adequate for a few heavy metals. Lead is among these exceptions. While a broad literature is available for hydroxide p...
Article
Wastewaters originating from alkyd resin production are typical examples of strong organic effluents containing toxic compounds. In this study, characterization and pretreatment of alkyd resin production wastewaters were experimentally assessed. The study aimed to remove toxics, reduce the strength of wastewaters to provide safe storage and their a...
Article
Full-text available
The control of nutrients is a priority issue to protect drinking water resources as well as other water bodies. Although this control can be ensured through well designed joint treatment systems in cities, its application in rural areas is not as technically feasible. Therefore, the concept of decentralized treatment and source separation of domest...
Article
Full-text available
In the present study, defluoridation of drinking water by electrocoagulation using stainless steel electrodes was experimentally investigated. In order to determine the effect of electrocoagulation operation parameters such as the applied current density (0.75-15.16 mA/cm 2), initial pH (3.0-6.0), initial fluoride concentration (2-5 mg/L) and type...
Article
Full-text available
Struvite precipitation has been applied to several types of wastewater for removal and recovery of nutrients. Engineering criteria for these applications, particularly crystallization, have yet to be developed. In the present study, effects of solution composition on the induction period and crystallization rate of struvite were experimentally inve...
Article
In the present study, the reaction conditions required for the oxidation of dimethyl phthalate (DMP), being selected as a model endocrine disrupting compound, with the H2O2/UV-C treatment process were optimized using central composite design and response surface methodology (CCD–RSM). Initial DMP (DMPo = 20–100 mg/L) concentration, initial H2O2 dos...
Article
In the present study aqueous solutions of Brij30, an alcohol ethoxylate surfactant, were photocatalytically and photochemically treated by employing the TiO2/UV-A, H2O2/UV-C and persulfate (PS)/UV-C processes. During TiO2/UV-A treatment, even in short reaction periods (10 minutes), high rates of Brij30 removals were achieved; however, longer experi...
Article
Full-text available
In the present study, ettringite precipitation was theoretically and experimentally evaluated as a means of sulphate removal. The results showed that ettringite precipitation is an effective and reliable method for sulphate removal. Synthetically prepared samples which were simulated to total wastewaters originating from textile industry (sulphate...
Article
Full-text available
Phthalic acid esters, commonly called as phthalates, are of a common use in the industrial activities and are known with their hazardous impact on the environment and on humans such as endocrine disrupting agents, carcinogenic and toxic effects. These adverse effects have led to increasing interest and research on the treatment and control of phtha...
Article
Full-text available
In the present study, the treatability of indigo dyeing effluents by the electrocoagulation (EC) process using stainless steel electrodes was experimentally investigated. The samples used were concentrated with main pollutant parameters of chemical oxygen demand (COD) (1000–1100 mg/L), reduced sulphur species (over 2000 mg , and colour (0.12–0.13 1...
Article
Full-text available
In the present study, ettringite precipitation as an alternative treatment option for sulphate removal from indigo dyeing wastewaters was investigated. The conversion of reduced sulphur species, present in indigo dyeing wastewaters was experimentally evaluated by hydrogen peroxide (H2O2) oxidation and catalytic-air oxidation. Calcium sulphate preci...
Article
Full-text available
In the present study, visible and UV-A light induced photocatalysis of aqueous solutions of formic and oxalic acid with S-doped, Fe-loaded TiO2 (SFT) was investigated. The effect of formic and oxalic acid concentrations (50 and 100 mg/L), initial pH (3 and 7) and catalyst concentrations (5 and 10 g/L) under visible or UV-A light on degradation rate...
Article
In the present study, a three-factor central composite design (CCD) was implemented to evaluate the major factors (treatment time, initial H2O2 dose and initial diethyl phthalate (DEP) concentration) influencing the H2O2/UV-C treatment of aqueous DEP solution. Significant regression models for total organic carbon (TOC) removal and residual H2O2 co...
Article
Full-text available
Cost-effective methods are required to treat a wide range of wastewater pollutants in a diverse range of conditions. As compared with traditional treatment methods, electrocoagulation provides a relatively compact and robust treatment alternative in which sacrificial metal anodes initiate electrochemical reactions that provide active metal cations...
Article
Full-text available
Colour removal from industrial effluents, particularly from the textile industry, has become an important requirement as the adverse effects ofdyestuffs, such as toxicity, on the environment have been proven. Adsorption is a commonly used treatment method for colour removal. Although activated carbon is very effective for this purpose, a number of...
Article
Full-text available
This study makes a comparison between Fenton and photo-Fenton processes to study the mineralization of aqueous dimethyl phthalate (DMP) solutions, which was chosen as the model phthalate ester. At [Fe2+] 0:[H2O2]o ratio of 1:5 with initial Fe 2+ and H2O2 concentrations of 10 mM and 50 mM provided the best operation condition for the Fenton treatmen...
Article
Full-text available
In the present study, the treatability of an aluminium surface treatment effluent bearing high amount of fluoride (3360-6440 mg/L) and aluminium (2695-4690 mg/L) together with organic matter (340-370 mg COD/L) by electrocoagulation using aluminium electrodes was studied. The effect of varying operating parameters such as the applied current density...
Article
Full-text available
In the present study, the treatability of wastewaters originating from water-based paint production with latex binders was investigated. The results of characterization study indicated that the wastewaters can exhibit variable characters during the production depending on washing period, and their COD contents varied between 2800 and 15,990 mg/L. C...
Article
Full-text available
This study investigated the effect of stream segregation on the biodegradation characteristics of wastewaters generated by fur-suede processing. It was conducted on a plant located in an organized industrial district in Turkey. A detailed in-plant analysis of the process profile and the resulting pollution profile in terms of significant parameters...
Article
In this study, the degradation of dimethyl phthalate (DMP), taken as model compound for phthalate esters, by the photo-assisted peroxymonosulfate (PMS) process was investigated. The high oxidation potential of hydroxyl and sulfate radicals generated by the activation of PMS under UV-C light irradiation was used to completely oxidize aqueous DMP sol...
Article
Full-text available
Oxidation of a spent reactive dye bath containing a mixture of Remazol brand dyes as well as two main inorganic additives was carried out using ozone and decolorization was obtained in a relatively short time (10–30 min) and ozone utilizations were between 329 and 1609 mg. The spent dye bath oxidation could not be represented by any simple kinetics...
Article
In the present study, the treatability of aqueous DEP solution employing H2O2/UV-C oxidation and the changes in acute and/or chronic toxicity of untreated and H2O2/UV-C treated DEP solutions was investigated. For DEP removal and its ultimate oxidation (mineralization), an optimum initial H2O2 concentration of 40 mM was required. The HO• bimolecular...
Article
Full-text available
In the present study, the treatment of metal plating wastewater containing complexed metals originating from the nickel and zinc plating process by electrocoagulation (EC) using stainless steel electrodes was explored. In order to improve the organic matter removal efficiency, the effect of H(2)O(2) addition to the electrocoagulation (the combined...
Article
Full-text available
In the present study, the treatment of aqueous dimethyl phthalate (DMP) by the combined electrocoagulation/Fenton (EC/Fenton) process was investigated. Compared with plain electrocoagulation, the combined EC/Fenton process proved to be a more effective treatment alternative both considering complete DMP degradation and organic matter removal in ter...
Article
In this paper, characterization and treatability of water-based paint manufacture wastewaters were assessed. The aim of the study was to comparatively evaluate the effect of replacement of the conventional binder PVA with latex. Binder is an important component of paint production and one of the determining elements of wastewater characteristics. W...
Conference Paper
Full-text available
H2O2/UV-C and photo-Fenton oxidation processes were applied to treat a toxic cationic textile surfactant (a quaternary ammonium ethoxylate) frequently used in the textile preparation stage. The effect of pH, effluent COD, H2O2 concentration and photochemical treatment time were investigated. Experimental results have indicated that the cationic sur...
Article
Full-text available
In this study, struvite precipitation coupled with an activated sludge process was applied to slaughterhouse wastewaters. Biological treatability characteristics of the wastewater were evaluated in a wide organic loading range of 0.06-0.42 g COD (g MLVSS)(-1)d(-1) to assess COD removal as well as the extent of nitrification. Results of biological t...
Article
In this study, treatment of phthalates by electrocoagulation employing stainless steel electrodes was investigated using dimethyl phthalate (DMP) as a model compound. DMP was completely destructed within 30 min up to the high initial concentration of 100mg/L while total mineralization was also obtained within a couple of hours. The applied current...
Article
This paper discusses the feasibility of the ultraviolet radiation-hydrogen peroxide (H(2)O(2)/UV-C) process as an advanced oxidation process (AOP) in the treatment of endocrine disrupting compounds (EDC). Dimethyl phthalate (DMP) was chosen as the model compound owing to its classification as an EDC. Experiments have been conducted at various pH va...
Article
In this paper, application of electrocoagulation using common electrode materials (aluminum and stainless steel) to a simulated reactive dyebath effluent was investigated. A mixture of dyes and auxiliary chemicals rather than a single dyestuff was employed to reflect actual reactive dyeing conditions. The experimental study focused on the effect of...
Article
In this paper, the results of a comprehensive study on Istanbul's industrial pretreatment sludges are presented. 1042 industrial plants were applying pretreatment in Istanbul. The information gathered from several sources and site visits. Evaluation of the data, together with theoretical predictions indicated that total amount of pretreatment sludg...
Article
Full-text available
In this study, struvite precipitation of human urine was experimentally studied on both synthetic and actual urine samples. One of the main conclusions of the study was that removal of the ions constituting struvite from the solution was not in proportion with the stoichiometry of the solid and excess magnesium and phosphate removals varied from 2....
Article
Full-text available
In the present study, the treatability of a metal plating wastewater containing complexed metals originating from the nickel and zinc plating process by electrocoagulation using stainless steel electrodes was experimentally investigated. The study focused on the effect of important operation parameters on electrocoagulation process performance in t...
Article
Full-text available
This study attempts to evaluate the applicability of chemical oxidation processes to polish biologically treated effluent of a plant manufacturing hardboard from waste paper to comply with the discharge limit of 120 mg l(-1) chemical oxygen demand (COD). In the first step, a chemically assisted settling was applied. The optimum results were obtaine...
Article
Reactive dyebath effluents are ideal candidates for electrocoagulation due to their intensive color, medium strength, recalcitrant COD and high electrolyte (NaCl) content. The present study focused on the treatability of simulated reactive dyebath effluent (COD(o)=300 mg/L; color in terms of absorbance values A(o,436)=0.532 cm(-1), A(o,525)=0.693 c...
Article
Pharmaceuticals formulation plants have a variety of wastewater sources. A significant part of these wastewaters can be directly conducted to central biological treatment. Among the wastewater groups that need a pretreatment, antibiotic wastewaters require a special attention due to their toxicity to biological treatment and low biodegradability. I...
Article
In this study, landfill leachate treatment technologies alternative to anaerobic treatment were experimentally investigated. The emphasis was placed upon nitrogen removal through the use of struvite precipitation. Treatment technologies studied included struvite precipitation, low pH (acidic) air stripping, and activated sludge. Dilution of landfil...
Article
Treatment of real reactive dyebath effluent comprising of an exhausted reactive dyebath and its sequential rinses with electrocoagulation (EC) using aluminum (Al) and stainless steel (SS) electrodes was investigated. The experimental study focused on the effect of applied current density (22-87 mA/cm(2); at an initial, optimum pH of 5.5) on decolor...
Article
Coagulation and electrocoagulation (EC) using aluminum (Al) and stainless steel (SS) electrodes were investigated for color and COD removal from a simulated spent disperse dyebath analogue (COD0 = 3300 mg/L; apparent color in absorbance (A) units at the wavelengths 436, 525 and 620 nm: A 436 = 0.992 cm-1, A525 = 0.910 cm-1; A620 = 0.616 cm-1, respe...
Article
Full-text available
In the present study, the treatability of a commercial naphthalene sulphonic acid formulation frequently used as a dyebath auxiliary in the textile dyeing operation by electrocoagulation with stainless steel electrodes was studied and its organic matter removal performance was compared with that of plain coagulation process using iron salts and alu...
Conference Paper
Yeni gemi inşaası taleplerinin karşılanabilmesi amacıyla, ülkemizdeki gemi inşa tesisi sayısının artırılması yönündeki çalışmalar Denizcilik Müsteşarlığı’nca sürdürülmektedir. Özellikle İstanbul ve yakın çevresinde yoğunlaşan tersane işletmelerinin ülkemizin diğer bölgelerinde de yaygınlaşması ve bu bölgelerdeki ihtiyacı karşılaması amacıyla söz ko...
Conference Paper
Geçmişte ve günümüzde Türkiye sahil şeridi dünya deniz taşımacılığının ve turizmin önemli noktalarından biri olmuştur. Türkiye Turizm Stratejisi çerçevesinde sahil şeritlerimizde yeni yat limanlarının kurulması ve işletilmeye alınması özendirilmekte ve bu yönde destekler sağlanmaktadır. Bununla birlikte kirlenmenin ve özellikle deniz kirliliğinin ö...
Article
Pretreatment of an acid dyebath effluent bearing a new generation chromium complex azo dyestuff (C0 = 350 mg/L) with Fenton's reagent was investigated. Preliminary optimisation (baseline) experiments were conducted to determine the Fe2+, H2O2 concentrations and pH required to the highest possible COD and colour removals. Kinetic studies were carrie...
Article
Full-text available
In this paper, experimental studies were performed on a simulated reactive dyebath effluent to compare coagulation-flocculation and Fenton's oxidation with electrocoagulation using stainless steel (SS 304) and aluminium electrodes in terms of colour and COD removals as well as AOX formation potential and improvement of biological treatability. Resu...
Article
In this study, the effects of the phosphonic acid based sequestering agent EDTMPA used in the textile dye baths on colour and organic matter removal by ozone oxidation was experimentally investigated. Procion Navy HEXL dyestuff that has been commonly used for the reactive dyeing of cellulose fibers was selected as the model component. The organic m...
Article
Full-text available
Struvite precipitation from wastewaters has gained importance as a means of nitrogen and phosphorus treatment and recovery. While the aspects of process modeling and application have been widely studied, little attention was paid to process kinetics. This study attempted to evaluate the induction time of struvite precipitation for low ammonia conce...