نتایج جستجو برای: natural water samples

تعداد نتایج: 1361350  

Journal: :international journal of aquatic biology 0
amir hossein hamidian mansoureh hassanzadeh

eutrophication is known as the most common problem in water bodies, caused by high concentrations of different nutrients leading to unbalanced growth of aquatic plants, among other symptoms. hence, the possibility of eutrophication prediction can be beneficial to the sustainable management of these natural resources and create an opportunity to control their trophic conditions over time. a soft...

Journal: :Applied sciences 2021

In this study, the preservation of As(III) in model solutions and natural groundwater samples from four locations Croatia was conducted. Model laboratory were spiked with As(V), different complexing agents. Solutions analysed intervals 24, 48 h during ten days after preparation. containing citric acid, sodium citrate, oxalate potassium tartrate combination acetic As(III)and showed good species ...

Journal: :Ground water 2008
P B McMahon F H Chapelle

Reduction/oxidation (redox) conditions in 15 principal aquifer (PA) systems of the United States, and their impact on several water quality issues, were assessed from a large data base collected by the National Water-Quality Assessment Program of the USGS. The logic of these assessments was based on the observed ecological succession of electron acceptors such as dissolved oxygen, nitrate, and ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشکده علوم زمین سازمان زمین شناسی و اکتشافات مع 1390

the neogene intrusion masses in the noudeh-enghelab area located to the north of sabzevar ophiolite have cut the late cretaceous ophiolitic rocks, sedimentary- volcanic and eocene volcanic rocks and have been covered by pliocene and quaternary deposits. the margin is of lava with basalt, phyric andesite-basalt and andesite and the central parts (dome shaped) composed of phyric andesite-trachyan...

Journal: :Journal of chromatography. A 2013
Meng Qiao Weixiao Qi Huijuan Liu Jiuhui Qu

Polycyclic aromatic hydrocarbons (PAHs) are likely to transform to more mutagenic and carcinogenic substituted polycyclic aromatic hydrocarbons (SPAHs) in the environment. To date, no literature has reported on an analytical method for SPAHs in the natural water environment (encompassing water, suspended particulate and sediment matrix). A robust and routine analytical method was developed for ...

Journal: :Ciência e Tecnologia de Alimentos 2004

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