A. Ergin Duygu | Ankara University (original) (raw)

Papers by A. Ergin Duygu

Research paper thumbnail of Biyokütle Enerjisi İçin Yetiştiriciliğin Etkileri Konusunda Araştırmalar I. Bilgi Birikimi Işığında Türkiye’deki Eko-Ekolojik Etki Potansiyeli

Ankara Üniversitesi Çevrebilimleri Dergisi, 2010

... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fizikse... more ... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fiziksel ve kimyasal erozyon engellenebilecek; biyokütle hammadde hazırlama, biyokütle enerjisi üretim tesisleri, üretimde kullanılacak makina ve ekipmanların üretileceği diğer yan sanayi tesisleri ile ...

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

dergiler.ankara.edu.tr

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

dergiler.ankara.edu.tr

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

Communications, Faculty of Science, University of Ankara Series C Biology, Geological Engineering and Geophysical Engineering, 2010

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of Enhancement of microalgal biomass production and dissolved inorganic C fixation from actual coal flue gas by exogenous salicylic acid and 1-triacontanol growth promoters

Research paper thumbnail of İkli̇m Deği̇şi̇kli̇ği̇, Kuraklaşma Ve Çölleşme İle Savaşimin Önemi̇ Ve Bazi Örnekler

Research paper thumbnail of Biyokütle Enerjisi İçin Yetiştiriciliğin Etkileri Konusunda Araştırmalar I. Bilgi Birikimi Işığında Türkiye'deki Eko-Ekolojik Etki Potansiyeli

dergiler.ankara.edu.tr

... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fizikse... more ... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fiziksel ve kimyasal erozyon engellenebilecek; biyokütle hammadde hazırlama, biyokütle enerjisi üretim tesisleri, üretimde kullanılacak makina ve ekipmanların üretileceği diğer yan sanayi tesisleri ile ...

Research paper thumbnail of Türkiye’nin Avrupa Birliği ile Katılım Müzakereleri Sürecinde Natura 2000 Korunan Alanlar Ekolojik Ağı’nın Değerlendirilmesi

Ankara Üniversitesi Çevrebilimleri Dergisi, 2009

Research paper thumbnail of Biodegradation of phenol by Synechocystis sp. in media including triacontanol hormone

Water and Environment Journal, 2012

Research paper thumbnail of Utilization of LPG and gasoline engine exhaust emissions by microalgae

Journal of Hazardous Materials, 2013

The effect of engine exhaust emissions on air pollution is one of the greatest problems that the ... more The effect of engine exhaust emissions on air pollution is one of the greatest problems that the world is facing today. The study focused on the effects of realistic levels of engine exhaust emissions of liquid petroleum gas (LPG) and gasoline (GSN) on Phormidium sp. and Chlorella sp. Multi parameters including pH, different medial compositions, fuel types, flow rates and biomass concentrations were described in detail. Effects of some growth factors such as triacontanol (TRIA) and salicylic acid (SA) have also been tested. The maximum biomass concentration of Phormidium sp. reached after 15 days at 0.36 and 0.15 g/L initial biomass concentrations were found as 1.160 g/L for LPG emission treated cultures and 1.331 g/L for GSN emission treated cultures, respectively. The corresponding figures were 1.478 g/L for LPG emission treated cultures and 1.636 g/L for GSN emission treated cultures at 0.65 and 0.36 g/L initial Chlorella sp. biomass concentrations. This study highlights the significance of using Phormidium sp. and Chlorella sp. for utilization of LPG and GSN engine exhaust emissions by the help of growth factors.

Research paper thumbnail of SO2 and NO2 tolerance of microalgae with the help of some growth stimulators

Energy Conversion and Management, 2012

and sharing with colleagues.

Research paper thumbnail of Potential of Gonium spp. in Synthetic Reactive Dye Removal, Possible Role of Laccases and Stimulation by Triacontanol Hormone

Water Air and Soil Pollution

In this study, Gonium sp. was investigated for possible usage in dye-containing wastewater treatm... more In this study, Gonium sp. was investigated for possible usage in dye-containing wastewater treatment. Trials were performed in media including triacontanol hormone, Reactive Orange 14, Reactive Red 120, Reactive Black 5, Remazol Brilliant Blue R (RBBR), and also hormone against the controls. Algae could remove RBBR with the highest dye removal percentage (56%) among the tested dyes. The optimum pH was 9 in removing 50 mg L−1 RBBR at a dye removal percentage of 47.1%. The role of laccase activity of Gonium sp. was also investigated. This first attempt in the literature showed the involvement of the enzyme in the algal growth and bioremoval process. In the presence of the plant growth hormone in the culture, the activity showed a steady and significant increase up to nearly sixfold between 5th and 14th days of incubation.

Research paper thumbnail of Stimulation of reactive dye removal by cyanobacteria in media containing triacontanol hormone

Journal of Hazardous Materials, 2009

In this study, Reactive Red, Remazol Blue, and Reactive Black B removal capacities of Synechocyst... more In this study, Reactive Red, Remazol Blue, and Reactive Black B removal capacities of Synechocystis sp. and Phormidium sp. were investigated. The microorganisms were cultivated in 100 ml BG 11 medium and incubated at 30 • C under continuous illumination (12.5 w m −2 (2400 lx)) for 20 days in plant growth chamber. Trials were carried out at pH 9.5 for Reactive Red, pH 8.5 for Remazol Blue and Reactive Black B removal in media without and with triacontanol (TRIA). Removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA. So that, Synechocystis sp. and Phormidium sp. removed Reactive Red with 25.7% and 35.4%, Remazol Blue with 37.5% and 25.5%, and Reactive Black B with 29.2% and 28.3% yield at 25 mg l −1 dye concentrations, respectively. There is no report investigating dye removal by Synechocystis sp. and removal of pollutants in media including TRIA hormone. Our data indicated the cyanobacteria tested in this study were suitable for effective treatment processes of such wastewaters including reactive dyes, and their removal capacity could be increased by TRIA, through stimulation of the biomass production.

Research paper thumbnail of Triacontanol hormone stimulates population, growth and Brilliant Blue R dye removal by common duckweed from culture media

Journal of Hazardous Materials, 2010

This work is focussed on assessing the potentialities of Lemna minor (L.) for the treatment of re... more This work is focussed on assessing the potentialities of Lemna minor (L.) for the treatment of reactive dyes polluted wastewaters and investigating the possibility of bioremoval performance stimulation by adding triacontanol hormone to the cultures. In the vast literature describing removal of reactive dyes, considering the lack of reports using of common duckweed in wastewater treatment apparently due to the inadequate efficiency. In the present study, the experiments showed that 1 mg l −1 triacontanol stimulated duckweed growth. The effect of different dye types (Reactive Orange 14, Reactive Red 120, Reactive Black 5, Brilliant Blue R, and Reactive Brilliant Blue R) onto duckweed growth was tested. Plants grew at most in media with Brilliant Blue R. The highest biomass, in terms of frond number (87 ± 1.5) were accompanied with 59.6% maximum dye removal were found in samples containing 2.5 mg l −1 initial Brilliant Blue R and 1 mg l −1 triacontanol, indicating hormonal stimulation of both activities. The results presented here that L. minor (L.) could be used effectively to treat wastewaters containing dye.

Research paper thumbnail of Boron bioremoval by a newly isolated Chlorella sp. and its stimulation by growth stimulators

Water Research

Wastewater treatment a b s t r a c t It has been well documented that excess concentrations of bo... more Wastewater treatment a b s t r a c t It has been well documented that excess concentrations of boron (B) causes toxic effects on many of the environmental systems. Although Chlorella sp. has been studied to remove pollutants from water, its capacity to remove B has not been investigated yet. Boron removal levels of newly isolated Chlorella sp. were investigated in BG 11 media with stimulators as triacontanol (TRIA) and/or sodium bicarbonate (NaHCO 3 ) and without them, to test if they could increase the removal efficiency by increasing biomass. The assays were performed to determine the effect of different medial compositions, B concentrations, pH and biomass concentrations onto removal efficiency. Boron removal was investigated at 5e10 mg/L range at pH 8 in different medial compositions and maximum removal yield was found as 32.95% at 5.45 mg/L B in media with TRIA and NaHCO 3 . The effect of different pH values on the maximum removal yield was investigated at pH 5e9, and the optimum pH was found again 8. The interactive effect of biomass concentration and B removal yield was also investigated at 0.386e1.061 g wet weight/L biomass. The highest removal yield was found as 38.03% at the highest biomass range. This study highlights the importance of using new isolate Chlorella sp. as a new biomaterial for B removal process of waters containing B. ª journal home page: www.elsevier.com/loca te/watres w a t e r r e s e a r c h 4 6 ( 2 0 1 2 ) 1 6 7 e1 7 5 0043-1354/$ e see front matter ª

Research paper thumbnail of Türkiye'nin Avrupa Birliği ile Katõlõm Müzakereleri Sürecinde Natura 2000 Korunan Alanlar Ekolojik A ğõ'nõn De ğerlendirilmesi Assessment of Natura 2000 Protected Areas Ecological Network within the Context of Turkey's Accession Stage

Research paper thumbnail of KLİM DEĞİŞİKLİĞİ, KURAKLAŞMA VE ÇÖLLEŞME İLE SAVAŞIMIN ÖNEMİ VE BAZI ÖRNEKLER

Nüfus artışı ve sanayileşmeyle süreklilik kazanan, giderek hızlanan iklim değişikliğiyle artan ku... more Nüfus artışı ve sanayileşmeyle süreklilik kazanan, giderek hızlanan iklim değişikliğiyle artan kuraklaşma, erozyon, çoraklaşma, çölleşme, ormansızlaşma, sel ve taşkınlar ile kasırgalar, tayfunlar gibi afetlerin zararları yanında buzulların erimesi ve biyoçeşitlilik kaybı yüzyılın temel sorunlarıdır. Yaygınlaşan susuzluk, açlık, fakirleşme, ekolojik göç, aşırı üretim ve tüketim yanında fakirlik kaynaklı doğa tahribi kısırdöngüsü Akdeniz Havzası ve Türkiye'yi de etkilemektedir. Bu çerçevede çözümü giderek zorlaşan sorun ekolojik koşulların zorlayıcı etkileri artarken sürdürebilir kalkınmayı gerçekleştirebilmektir. Bunun için de çevresel kısırdöngüyü kırma konusundaki bilimsel çabaların özünü oluşturan bütünsel yaklaşımların temel prensiplerini, uygulamadaki başarıları ve yeterliliklerini, geleceğe dönük projeksiyonları irdeleyerek uzun erimli planlar yapmaktır.

Research paper thumbnail of ISO 14001 Çevre Yönetim Sistemi (ÇYS) Standardi : Türkiye'deki Bazi İşletmelerin Karşilaştiklari Problem ve Zorluklar Üzerine Bir Araştirma ISO 14001 Envionmental Management System (EMS) Standard: A Study on The Barriers and Problems Faced by Some Enterprises in Turkey

Özet: Bu çalışmada, işletmelerin ISO 14001 ÇYS'nin kurulum ve işletim aşamalarında yaşadıkları pr... more Özet: Bu çalışmada, işletmelerin ISO 14001 ÇYS'nin kurulum ve işletim aşamalarında yaşadıkları problem ve zorluklar ile etki derecelerinin ortaya konulması, ayrıca kurulumunu planlayan işletmelere rehber teşkil edebilecek bilgiler sunulması hedeflenmiştir. Bu amaçla Türkiye genelinde 62 işletmenin katıldığı bir anket çalışması yapılmıştır. Anket sorularının hazırlanmasında uluslararası literatürde yer alan genel sorun ve zorluklar yanında, Türkiye'de önceki yıllarda hazırlanan tez çalışmalarından yararlanılmıştır. Elde edilen sonuçlar 'Excel' ve SPSS paket programları ile analiz edilmiştir. Anket sonuçlarının literatürde belirlenenler ile paralellik gösterdiği, ancak hissedilme sıklık ve derecelerinde farklılıklar olduğu gözlemlenmiştir. Anket çalışması neticesinde görülen problem ve zorluklardan en baskın olanları; "çevre ile ilgili konulardaki alt yapı yetersizliği", "atık gideriminde lisanslı, uygun alanların bulunamaması", "devletin ve ilgili kurumların destek ve teşviklerinin yeterli olmaması" şeklinde belirlenmiştir. Bu sonuçlar literatürde verilenlerle karşılaştırılarak tartışılmıştır. Sonuç olarak başta bu sorunlar olmak üzere, belirlenen tüm problemlerin çözümü için, toplumun her düzeyinde işlevsel çevre bilincinin oluşturulması ve arttırılmasının, çevre yönetimi alt yapısının oluşturulması ve çevreci yaklaşımların yönetsel düzeyde desteklenmesinin çok önemli ve gerekli olduğu görülmüştür.

Research paper thumbnail of Biyokütle Enerjisi İçin Yetiştiriciliğin Etkileri Konusunda Araştırmalar I. Bilgi Birikimi Işığında Türkiye’deki Eko-Ekolojik Etki Potansiyeli

Ankara Üniversitesi Çevrebilimleri Dergisi, 2010

... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fizikse... more ... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fiziksel ve kimyasal erozyon engellenebilecek; biyokütle hammadde hazırlama, biyokütle enerjisi üretim tesisleri, üretimde kullanılacak makina ve ekipmanların üretileceği diğer yan sanayi tesisleri ile ...

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

dergiler.ankara.edu.tr

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

dergiler.ankara.edu.tr

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of The Effect of Salicylic Acid and Triacontanol on Biomass Production and Imidaclopirid Removal Capacity by Cyanobacteria

Communications, Faculty of Science, University of Ankara Series C Biology, Geological Engineering and Geophysical Engineering, 2010

Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 me... more Pesticide removal capacities of Synechocystis sp. and Phormidium sp. were investigated in BG11 media. Imidacloprid (IMI) is a widely used systemic insecticide to control plant pests following soil, seed or foliar applications, and is subject to cleaning. Bioremoval is one of the economical water treatment techniques in remediation. Trials were carried out at pH 7.5 for IMI at media with and without triacontanol (TRIA), a naturally occuring plant hormone and Salicylic acid (SA). The removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA and Salicylic acid. The removal efficiencies were measured at 150 mg L-1 concentrations of IMI. Synechocystis sp. and Phormidium sp. had the maximum values of removal of IMI in the media containing the hormone and Salicylic acid. The results showed that TRIA and Salicylic acid could be considered as a stimulant in pesticide removal by the isolated cyanobacteria cultures.

Research paper thumbnail of Enhancement of microalgal biomass production and dissolved inorganic C fixation from actual coal flue gas by exogenous salicylic acid and 1-triacontanol growth promoters

Research paper thumbnail of İkli̇m Deği̇şi̇kli̇ği̇, Kuraklaşma Ve Çölleşme İle Savaşimin Önemi̇ Ve Bazi Örnekler

Research paper thumbnail of Biyokütle Enerjisi İçin Yetiştiriciliğin Etkileri Konusunda Araştırmalar I. Bilgi Birikimi Işığında Türkiye'deki Eko-Ekolojik Etki Potansiyeli

dergiler.ankara.edu.tr

... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fizikse... more ... Örneğin Pimentel vd. ... baskı altında olan arazilerde yetiştiriciliğin yapılmasıyla, fiziksel ve kimyasal erozyon engellenebilecek; biyokütle hammadde hazırlama, biyokütle enerjisi üretim tesisleri, üretimde kullanılacak makina ve ekipmanların üretileceği diğer yan sanayi tesisleri ile ...

Research paper thumbnail of Türkiye’nin Avrupa Birliği ile Katılım Müzakereleri Sürecinde Natura 2000 Korunan Alanlar Ekolojik Ağı’nın Değerlendirilmesi

Ankara Üniversitesi Çevrebilimleri Dergisi, 2009

Research paper thumbnail of Biodegradation of phenol by Synechocystis sp. in media including triacontanol hormone

Water and Environment Journal, 2012

Research paper thumbnail of Utilization of LPG and gasoline engine exhaust emissions by microalgae

Journal of Hazardous Materials, 2013

The effect of engine exhaust emissions on air pollution is one of the greatest problems that the ... more The effect of engine exhaust emissions on air pollution is one of the greatest problems that the world is facing today. The study focused on the effects of realistic levels of engine exhaust emissions of liquid petroleum gas (LPG) and gasoline (GSN) on Phormidium sp. and Chlorella sp. Multi parameters including pH, different medial compositions, fuel types, flow rates and biomass concentrations were described in detail. Effects of some growth factors such as triacontanol (TRIA) and salicylic acid (SA) have also been tested. The maximum biomass concentration of Phormidium sp. reached after 15 days at 0.36 and 0.15 g/L initial biomass concentrations were found as 1.160 g/L for LPG emission treated cultures and 1.331 g/L for GSN emission treated cultures, respectively. The corresponding figures were 1.478 g/L for LPG emission treated cultures and 1.636 g/L for GSN emission treated cultures at 0.65 and 0.36 g/L initial Chlorella sp. biomass concentrations. This study highlights the significance of using Phormidium sp. and Chlorella sp. for utilization of LPG and GSN engine exhaust emissions by the help of growth factors.

Research paper thumbnail of SO2 and NO2 tolerance of microalgae with the help of some growth stimulators

Energy Conversion and Management, 2012

and sharing with colleagues.

Research paper thumbnail of Potential of Gonium spp. in Synthetic Reactive Dye Removal, Possible Role of Laccases and Stimulation by Triacontanol Hormone

Water Air and Soil Pollution

In this study, Gonium sp. was investigated for possible usage in dye-containing wastewater treatm... more In this study, Gonium sp. was investigated for possible usage in dye-containing wastewater treatment. Trials were performed in media including triacontanol hormone, Reactive Orange 14, Reactive Red 120, Reactive Black 5, Remazol Brilliant Blue R (RBBR), and also hormone against the controls. Algae could remove RBBR with the highest dye removal percentage (56%) among the tested dyes. The optimum pH was 9 in removing 50 mg L−1 RBBR at a dye removal percentage of 47.1%. The role of laccase activity of Gonium sp. was also investigated. This first attempt in the literature showed the involvement of the enzyme in the algal growth and bioremoval process. In the presence of the plant growth hormone in the culture, the activity showed a steady and significant increase up to nearly sixfold between 5th and 14th days of incubation.

Research paper thumbnail of Stimulation of reactive dye removal by cyanobacteria in media containing triacontanol hormone

Journal of Hazardous Materials, 2009

In this study, Reactive Red, Remazol Blue, and Reactive Black B removal capacities of Synechocyst... more In this study, Reactive Red, Remazol Blue, and Reactive Black B removal capacities of Synechocystis sp. and Phormidium sp. were investigated. The microorganisms were cultivated in 100 ml BG 11 medium and incubated at 30 • C under continuous illumination (12.5 w m −2 (2400 lx)) for 20 days in plant growth chamber. Trials were carried out at pH 9.5 for Reactive Red, pH 8.5 for Remazol Blue and Reactive Black B removal in media without and with triacontanol (TRIA). Removal capacities of Synechocystis sp. and Phormidium sp. were found higher in media containing TRIA. So that, Synechocystis sp. and Phormidium sp. removed Reactive Red with 25.7% and 35.4%, Remazol Blue with 37.5% and 25.5%, and Reactive Black B with 29.2% and 28.3% yield at 25 mg l −1 dye concentrations, respectively. There is no report investigating dye removal by Synechocystis sp. and removal of pollutants in media including TRIA hormone. Our data indicated the cyanobacteria tested in this study were suitable for effective treatment processes of such wastewaters including reactive dyes, and their removal capacity could be increased by TRIA, through stimulation of the biomass production.

Research paper thumbnail of Triacontanol hormone stimulates population, growth and Brilliant Blue R dye removal by common duckweed from culture media

Journal of Hazardous Materials, 2010

This work is focussed on assessing the potentialities of Lemna minor (L.) for the treatment of re... more This work is focussed on assessing the potentialities of Lemna minor (L.) for the treatment of reactive dyes polluted wastewaters and investigating the possibility of bioremoval performance stimulation by adding triacontanol hormone to the cultures. In the vast literature describing removal of reactive dyes, considering the lack of reports using of common duckweed in wastewater treatment apparently due to the inadequate efficiency. In the present study, the experiments showed that 1 mg l −1 triacontanol stimulated duckweed growth. The effect of different dye types (Reactive Orange 14, Reactive Red 120, Reactive Black 5, Brilliant Blue R, and Reactive Brilliant Blue R) onto duckweed growth was tested. Plants grew at most in media with Brilliant Blue R. The highest biomass, in terms of frond number (87 ± 1.5) were accompanied with 59.6% maximum dye removal were found in samples containing 2.5 mg l −1 initial Brilliant Blue R and 1 mg l −1 triacontanol, indicating hormonal stimulation of both activities. The results presented here that L. minor (L.) could be used effectively to treat wastewaters containing dye.

Research paper thumbnail of Boron bioremoval by a newly isolated Chlorella sp. and its stimulation by growth stimulators

Water Research

Wastewater treatment a b s t r a c t It has been well documented that excess concentrations of bo... more Wastewater treatment a b s t r a c t It has been well documented that excess concentrations of boron (B) causes toxic effects on many of the environmental systems. Although Chlorella sp. has been studied to remove pollutants from water, its capacity to remove B has not been investigated yet. Boron removal levels of newly isolated Chlorella sp. were investigated in BG 11 media with stimulators as triacontanol (TRIA) and/or sodium bicarbonate (NaHCO 3 ) and without them, to test if they could increase the removal efficiency by increasing biomass. The assays were performed to determine the effect of different medial compositions, B concentrations, pH and biomass concentrations onto removal efficiency. Boron removal was investigated at 5e10 mg/L range at pH 8 in different medial compositions and maximum removal yield was found as 32.95% at 5.45 mg/L B in media with TRIA and NaHCO 3 . The effect of different pH values on the maximum removal yield was investigated at pH 5e9, and the optimum pH was found again 8. The interactive effect of biomass concentration and B removal yield was also investigated at 0.386e1.061 g wet weight/L biomass. The highest removal yield was found as 38.03% at the highest biomass range. This study highlights the importance of using new isolate Chlorella sp. as a new biomaterial for B removal process of waters containing B. ª journal home page: www.elsevier.com/loca te/watres w a t e r r e s e a r c h 4 6 ( 2 0 1 2 ) 1 6 7 e1 7 5 0043-1354/$ e see front matter ª

Research paper thumbnail of Türkiye'nin Avrupa Birliği ile Katõlõm Müzakereleri Sürecinde Natura 2000 Korunan Alanlar Ekolojik A ğõ'nõn De ğerlendirilmesi Assessment of Natura 2000 Protected Areas Ecological Network within the Context of Turkey's Accession Stage

Research paper thumbnail of KLİM DEĞİŞİKLİĞİ, KURAKLAŞMA VE ÇÖLLEŞME İLE SAVAŞIMIN ÖNEMİ VE BAZI ÖRNEKLER

Nüfus artışı ve sanayileşmeyle süreklilik kazanan, giderek hızlanan iklim değişikliğiyle artan ku... more Nüfus artışı ve sanayileşmeyle süreklilik kazanan, giderek hızlanan iklim değişikliğiyle artan kuraklaşma, erozyon, çoraklaşma, çölleşme, ormansızlaşma, sel ve taşkınlar ile kasırgalar, tayfunlar gibi afetlerin zararları yanında buzulların erimesi ve biyoçeşitlilik kaybı yüzyılın temel sorunlarıdır. Yaygınlaşan susuzluk, açlık, fakirleşme, ekolojik göç, aşırı üretim ve tüketim yanında fakirlik kaynaklı doğa tahribi kısırdöngüsü Akdeniz Havzası ve Türkiye'yi de etkilemektedir. Bu çerçevede çözümü giderek zorlaşan sorun ekolojik koşulların zorlayıcı etkileri artarken sürdürebilir kalkınmayı gerçekleştirebilmektir. Bunun için de çevresel kısırdöngüyü kırma konusundaki bilimsel çabaların özünü oluşturan bütünsel yaklaşımların temel prensiplerini, uygulamadaki başarıları ve yeterliliklerini, geleceğe dönük projeksiyonları irdeleyerek uzun erimli planlar yapmaktır.

Research paper thumbnail of ISO 14001 Çevre Yönetim Sistemi (ÇYS) Standardi : Türkiye'deki Bazi İşletmelerin Karşilaştiklari Problem ve Zorluklar Üzerine Bir Araştirma ISO 14001 Envionmental Management System (EMS) Standard: A Study on The Barriers and Problems Faced by Some Enterprises in Turkey

Özet: Bu çalışmada, işletmelerin ISO 14001 ÇYS'nin kurulum ve işletim aşamalarında yaşadıkları pr... more Özet: Bu çalışmada, işletmelerin ISO 14001 ÇYS'nin kurulum ve işletim aşamalarında yaşadıkları problem ve zorluklar ile etki derecelerinin ortaya konulması, ayrıca kurulumunu planlayan işletmelere rehber teşkil edebilecek bilgiler sunulması hedeflenmiştir. Bu amaçla Türkiye genelinde 62 işletmenin katıldığı bir anket çalışması yapılmıştır. Anket sorularının hazırlanmasında uluslararası literatürde yer alan genel sorun ve zorluklar yanında, Türkiye'de önceki yıllarda hazırlanan tez çalışmalarından yararlanılmıştır. Elde edilen sonuçlar 'Excel' ve SPSS paket programları ile analiz edilmiştir. Anket sonuçlarının literatürde belirlenenler ile paralellik gösterdiği, ancak hissedilme sıklık ve derecelerinde farklılıklar olduğu gözlemlenmiştir. Anket çalışması neticesinde görülen problem ve zorluklardan en baskın olanları; "çevre ile ilgili konulardaki alt yapı yetersizliği", "atık gideriminde lisanslı, uygun alanların bulunamaması", "devletin ve ilgili kurumların destek ve teşviklerinin yeterli olmaması" şeklinde belirlenmiştir. Bu sonuçlar literatürde verilenlerle karşılaştırılarak tartışılmıştır. Sonuç olarak başta bu sorunlar olmak üzere, belirlenen tüm problemlerin çözümü için, toplumun her düzeyinde işlevsel çevre bilincinin oluşturulması ve arttırılmasının, çevre yönetimi alt yapısının oluşturulması ve çevreci yaklaşımların yönetsel düzeyde desteklenmesinin çok önemli ve gerekli olduğu görülmüştür.