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Nilüfer Çayı Bursa için önem arz eden bir su kütlesidir. Ancak birçok sanayi bölgesi tarafından kirletilmektedir. Bu çalışmada Nilüfer Çayı’nın bir kolu olan Ayvalı deresinin kirlilik yükünün ağır metal, anyon-katyon analizleri ve izorganik parametrelerce değerlendirilmesi amaçlanmıştır. Ayvalı deresinde belirlenen dört istasyondan su numuneleri polietilen kaplarla alınmıştır. Analiz sonuçları, Yerüstü Su Kalitesi Yönetmeliğinin (YSKY) sınıf değerlerine ve İnsani Tüketim Amaçlı Sular Hakkında Yönetmeliği (TS-266) limit değerlerine göre değerlendirilmiştir. Ayvalı deresinin YSKY’e göre III. ve IV. sınıf su kalitesinde olduğu görülmüştür. Nilüfer Çayı’nı etkileyen bu kirliliğin önlenebilmesi için bölgedeki sanayi atıklarının düzenli takip edilmesi ve periyodik olarak ölçümlerinin yapılması gerekmektedir.

This study was conducted from 2002 through 2007 with no studies in 2004, to evaluate 8 metal contaminants (As(total), Cd, Cr (total), Cu, Mn, Ni, Pb and Zn) of the Nilufer Stream, where intensive industrialization, urbanization, and agricultural activities take place. The results were then compared with national and international water quality guidelines. The effect of the wastewater treatment facilities that were established during the measurement period on water quality was also taken into account. It was determined that the Nilufer Stream water quality along the basin has declined rapidly year to year. Intensive wastewater discharge causes a waste dominating flow in the stream and has caused the water quality to steadily decline over time. The total chromium (Cr) and lead (Pb) levels in the basin outlet of the Nilufer Stream water were evaluated as "high polluted water" according to the national standards in the classification of the quality of the surface water. The mean metal concentrations in the Nilufer stream water are generally higher than the international guidelines. As a result, metal contaminant pollution of the Nilufer Stream was found to be connected to human activities in its catchments. Belediyeler - Bursa Su ve Kanalizasyon İdaresi

In this study, nine metals (Al, Cd, Cr. Cu, Fe, Mn, Ni, Pb, and Zn) found in urban wastewater treatment plants (WTPs) in Bursa (Turkey) were monitored for 23 months in 2002 and 2007. Metal influent and effluent concentrations of wastewater stabilization ponds (WSPs) and the activated sludge process (ASP) measured via 24-h composite samples were used to determine removal efficiencies. Average influent concentrations ranged between 2 mu g/L (Cd) and 1975 mu g/L (Fe). In the stabilization ponds, the removal efficiency was 58% for Cr, while for Cd. Mn, and Pb, it was less than 20%. The activated sludge process yielded high removal efficiencies, ranging from 47% for Ni to 95% for Cr. The use of treated wastewaters for agricultural purposes was investigated, and it was determined that all metal concentrations met application limits, with the exception of Cr in wastewater stabilization pond effluent. Results showed that wastewater stabilization pond effluent reduced the receiving water quality with respect to Cr, Cu, Ni. and Pb. In addition, it was shown that effluent from the activated sludge process temporarily improved the receiving water quality with regard to the Cd, Cu, Mn, and Zn parameters. However, considering the periodic variations of the metals in both processes, water quality, and agricultural practices, it was determined that they should be monitored continuously. (C) 2009 Elsevier B.V. All rights reserved. BUSKİ

Nilufer stream (Bursa, Turkey) receives domestic and industrial discharges containing heavy metals as well as organic pollutants. The speciation profiles of discharge waters were built up for chromium(Ill) and chromium(VI) ions in samples those were collected on a monthly basis from two stations in September 1996-August 1998 period. They indicate that chromium(III) contents of samples from station I that was in leather tanneries region were higher than of samples from station 11 that was in automotive and textile industries region. In order to remove Cr(III) ion from discharge waters by complexometry, the removing tendencies of some ligands such as salicylic acid and salicylic acid derivatives were ordered by means of the speciation diagrams of Cr(III):ligand systems, the working pH values and reduced concentrations of Cr(III).

In this study, heavy metal content (Cr, Cu, Mn, Ni, Zn) was determined in sediments and different organs of Rumex obtusifolius L. and Polygonum lapathifolium L. (Polygonaceae), Urtica dioica L. (Urticaceae) and Xanthium strumarium L. (Asteraceae) species. These species grow ubiquitously and vigorously on the periodic flooding areas of Nilufer stream which have been polluted by different local industrial activities. Below and above-ground parts of plant samples and their sediments were analyzed by ICP-MS for their elemental contents. In general, the variations in the heavy metal content in sediments are reflected in heavy metal status of plant organs. However, this variation depends on plant species and heavy metals. R. obtusifolius, U. dioica and X. strumarium species have elevated levels of Cr, Cu, Ni, and Zn whereas Mn was observed only in P. lapathifolium. The contribution of different organs to the accumulation capacity of the total phytomass is specific to species.