Geri Dön

Mercury isotopes in plants

Başlık çevirisi mevcut değil.

PDF İndir

  1. Tez No: 402628
  2. Yazar: AYÇA DOĞRUL
  3. Danışmanlar: DR. LEROY ODOM
  4. Tez Türü: Yüksek Lisans
  5. Konular: Ziraat, Agriculture
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2010
  8. Dil: İngilizce
  9. Üniversite: Florida State University
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 54

Özet

Özet yok.

Özet (Çeviri)

As a global pollutant and a metal toxic to living organisms, mercury is one of the most environmentally studied elements. The mercury cycle is a complex phenomenon due to transfonnations in various media and exchange between them. Thus, there is an incomplete und erstanding of the mercury cycle in the environment. The recent fınding of Mass Independent Fractionation (MIF) of mercury isotopes (Bergquist and Blum, 2007; Ghosh et al., 2008) portend a new understanding of mercury isotopes and the mercury cycle in the environment. Different mercury isotopic features of different materials potentially indicate possible different transfonnations of mercury. This study attempts to define mercury isotopic features of plants and relate these with different photosynthetic pathways which are obtained by examining carbon isotopic signatures of plants. Plants were sub-sampled into leaves, stems and roots, with the understanding that if fractionation of mercury isotopes occurred in vivo, plants might be isotopically heterogeneous. Soil samples were also analyzed in this study to examine possible differences between plants and soils and also possible transfonnations inside the plants. Both C3 and C4 plants exhibit mass dependent and mass independent mercury isotope effects. Both C3 and C4 plants are enriched in light isotopes, but the degree of mass :fractionation is approximately three times greater in C3 plants, than in C4 plants ( -0.29%o/amu compared to - 0.09%o/amu). Mercury in both C3 and C4 plants exhibit a MIF isotope effect as well; that being a depletion (generally less than 0.5%o) of the odd mass isotopes 199Hg and 201Hg. The one CAM plant studied contained mercury that is slightly heavy isotope enriched and with no clearly discemable MIF effect. These findings suggest a connection between the isotopic composition of mercury and the photosynthetic pathway of the plants. Leaves are slightly more :fractionated than the roots are. The mass dependent effect is a light isotope enrichment of up to 1.54 %o. Mass independent fractionation is a relative depletion of the odd mass isotopes with L1199Hg ranging from -0.12 to -0.6 %o. A difference in the MIF effect of root-leaf pairs seems to require different sources. Soils also showed similar isotopic feature with the plants samples.

Benzer Tezler

  1. Tez No

    66520

    Radyoaktif izleme tekniği ile çevresel metal kirliliğinin pelargonium peltatum bitkisi üzerine etkisinin incelenmesi

    Investigation of environmental metalic pollution effects of pelargonium pentatum by using radiotracer technique

    IŞIK KAÇMAZ

    Yüksek Lisans

    Türkçe

    Türkçe

    1997

    Nükleer Mühendislikİstanbul Teknik Üniversitesi

    Fizik Ana Bilim Dalı

  2. Tez No

    66878

    Hastane atıklarının atık azaltımı yöntemi ile değerlendirilmesi

    Başlık çevirisi yok

    FİLİZ GÜRSOY

    Yüksek Lisans

    Türkçe

    Türkçe

    1997

    Çevre Mühendisliğiİstanbul Teknik Üniversitesi

    Çevre Mühendisliği Ana Bilim Dalı

    PROF. DR. İLHAN TALINLI

  3. Tez No

    525528

    Çan termik santrali çevresinde ağır metal ve sülfürün coğrafi dağılışı ve çevresel etkileri

    Geographic distribution and environmental effects of heavy metal and sulfur around çan thermal power plant

    FİKRİYE GÜL

    Yüksek Lisans

    Türkçe

    Türkçe

    2018

    CoğrafyaÇanakkale Onsekiz Mart Üniversitesi

    Coğrafya Ana Bilim Dalı

    PROF. DR. CENGİZ AKBULAK

  4. Tez No

    796923

    Denizli Havzası'nın Doğu'sundaki traverten litofasiyeslerin sedimantolojisi, diyajenezi ve petrofiziksel özellikleri (GB, Türkiye)

    Sedimentological, diagenetical and petrophysical characterization of travertine lithofacies in the east of Denizli basin (SW Turkey)

    CİHAN ARATMAN

    Doktora

    İngilizce

    İngilizce

    2023

    Petrol ve Doğal Gaz MühendisliğiPamukkale Üniversitesi

    Jeoloji Mühendisliği Ana Bilim Dalı

    PROF. DR. MEHMET ÖZKUL

  5. Tez No

    772039

    Investigation of catalytic effects of Al(III), Sc(III), Y(III) on generation of cadmium vapor in the presence of potassiumcyanide

    Al(III), Sc(III), Y(III) elementlerinin potasyum siyanür varlığında kadmiyum buharı üretimine katalitik etkilerinin incelenmesi

    AHMET ÇELİK

    Yüksek Lisans

    İngilizce

    İngilizce

    2015

    KimyaJackson State University

    Analitik Kimya Ana Bilim Dalı

    PROF. DR. ZİKRİ ARSLAN

Geri Dön