Waste minimization study in a solvent-based paint manufacturing plant

Solvent-based paint manufacturing plants produce significant quantities of hazardous waste, which must be properly treated before it can be disposed. Since the cost for treating this waste is high, reducing the quantity of waste has become a crucial issue in this industry

Effect of chloride concentration on the oxidation of EDTA in UV-FSR oxidative system

This study focused on the effect of chloride concentration and pH on the photochemical degradation of ethylenediaminetetraacetic acid-disodium salt (C10H14N2Na2O8 center dot 2H(2)O, EDTA) under advanced oxidation using UV/H2O2 system. The treatment of this chemical by UV/H2O2 oxidation using a laboratory scale UV-free surface reactor (UV-FSR) with (1000 and 10,000 mg/l Cl-) and without Cl- addition at different pH values (pH 3, 7 and 10) was compared. Results of this study indicated that Cl- concentration is more decisive than pH in the oxidation process. There was no AOX at the start of the experiments but as a result of oxidation a de novo synthesis of AOX was observed, and these AOX(de novo) compounds were destroyed during the treatment. Treatment was followed by TOC and AOX measurements. Approximately 95% TOC removal efficiency was obtained for the treatment of EDTA-containing synthetic water. Owing to kinetic studies, it was found that the TOC degradation in all experiments fitted to the first order reaction law. (C) 2007 Elsevier B.V. All rights reserved

Influence of chloride concentration on the formation of AOX in UV oxidative system

In this study, the effects of chloride ion concentration and pH on UV oxidation treatment were examined. Acetone and sodium dodecyl sulfate (ABS) were used as organic substances. The treatment efficiencies of these chemicals by UV/H2O2 oxidation using a laboratory scale UV-free surface reactor (UV-FSR) with or without Cl- addition at different pH values was compared. Results of this study indicated that Cl- concentration and the chemical structure of the substances are more decisive than pH in the oxidation process. There was no AOX at the start of the experiments but as a result of oxidation a de novo synthesis of AOX was observed, and these AOX(de novo) compounds were destroyed during the treatment. Treatment was followed by TOC and AOX measurements. Approximately 98% and 95% TOC removal efficiencies were obtained for the treatment of acetone and ABS containing wastewaters, respectively. (C) 2006 Elsevier B.V. All rights reserved

PROBABLE IMPACT OF PROPOSED IZMIR WASTEWATER TREATMENT PLANT EFFLUENTS ON IZMIR BAY WATER QUALITY.

Bogazici Univ, Inst of Environmental Sciences, Istanbul, Turk;Bogazici Univ, Technology & Systems Research Inst, Istanbul,Appropriate Waste Management for Developing Countries. Proceedings of the First International Symposium on Environmental Technology for Developing Countries. -- Istanbul, Turk -- 8309The probable impact of proposed Izmir wastewater treatment plant effluents on Izmir bay water quality is discussed. First the characteristics of Izmir bay water with respect to: physical quality, chemical quality, biological quality, and dispersion effects is discussed. Then various alternative disposal techniques are discussed and finally the impact of these on the water quality is considered

Picturing asthma in Turkey: results from the Turkish adult asthma registry

Introduction: National data on asthma characteristics and the factors associated with uncontrolled asthma seem to be necessary for every country. For this purpose, we developed the Turkish Adult Asthma Registry for patients with asthma aiming to take a snapshot of our patients, thereby assigning the unmet needs and niche areas of intervention. Methods: Case entries were performed between March 2018 and March 2022. A web-based application was used to record data. Study outcomes were demographic features, disease characteristics, asthma control levels, and phenotypes. Results: The registry included 2053 patients from 36 study centers in Turkey. Female subjects dominated the group (n = 1535, 74.8%). The majority of the patients had allergic (n = 1158, 65.3%) and eosinophilic (n = 1174, 57.2%) asthma. Six hundred nineteen (32.2%) of the patients had obese asthma. Severe asthma existed in 670 (32.6%) patients. Majority of cases were on step 3–5 treatment (n: 1525; 88.1%). Uncontrolled asthma was associated with low educational level, severe asthma attacks in the last year, low FEV1, existence of chronic rhinosinusitis and living in particular regions. Conclusion: The picture of this registry showed a dominancy of middle-aged obese women with moderate-to-severe asthma. We also determined particular strategic targets such as low educational level, severe asthma attacks, low FEV1, and chronic rhinosinusitis to decrease uncontrolled asthma in our country. Moreover, some regional strategies may also be needed as uncontrolled asthma is higher in certain regions. We believe that these data will guide authorities to reestablish national asthma programs to improve asthma service delivery