نتایج جستجو برای: petrogenic and pyrolitic source

تعداد نتایج: 16867566  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...

Journal: :Biology 2021

Pollution associated with petrogenic hydrocarbons is increasing in Antarctica due to a combination of human activity and the continent’s unforgiving environmental conditions. The current study focuses on ability cold-adapted crude microbial consortium (BS24), isolated from soil north-west Antarctic Peninsula, metabolise diesel fuel as sole carbon source shake-flask setting. Factors expected inf...

Journal: :Biogeosciences 2022

Abstract. Studies engaging in tracking headwater carbon signatures downstream remain sparse, despite their importance for constraining transfer and transformation pathways of organic (OC) developing regional-scale perspectives on mechanisms influencing the balance between remineralization export. Based a 40-month time series, we investigate dependence hydrology seasonality discharge sediment OC...

2013
Rajesh Kumar Ranjan Joyanto Routh A. L. Ramanathan J. Val Klump Val Klump

The sources and historical deposition of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated in dated sediment cores from the Pichavaram mangrove-estuarine complex. The ΣPAH flux in mangrove and estuarine sediments are 0.064 ± 0.031 μg/cm 2 /yr and 0.043 ± 0.020 μg/cm 2 /yr, respectively. The PAH flux in sediments increases up-core coinciding with rapid urbanization since the 1970s. Th...

Journal: :Environmental pollution 2006
Adi Oren Zeev Aizenshtat Benny Chefetz

The Kishon River, the second largest coastal river in Israel, has been severely polluted for several decades. Sediments from upstream and downstream sites of the river were analyzed, lipid-extracted and evaluated for phenanthrene uptake. Total polycyclic aromatic hydrocarbon (PAH) concentration in downstream sediments was 299 microg kg(-1), consisting mostly of petrogenic-derived PAHs. Downstre...

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