Colloidal mercury (Hg) distribution in soil samples by sedimentation field-flow fractionation coupled to mercury cold vapour generation atomic absorption spectroscopy

2012 ◽  
Vol 14 (1) ◽  
pp. 138-145 ◽  
Author(s):  
A. Santoro ◽  
R. Terzano ◽  
L. Medici ◽  
M. Beciani ◽  
A. Pagnoni ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Soil Samples ◽  
Field Flow Fractionation ◽  
Cold Vapour ◽  
Flow Fractionation ◽  
Sedimentation Field Flow Fractionation ◽  
Vapour Generation

scholarly journals Lead behavior in soil treated with contaminated sewage sludge and cultivated with maize

2003 ◽  
Vol 46 (4) ◽  
pp. 499-505 ◽  
Author(s):  
Marcilene Ferrari Barriquelo ◽  
Marinês Aparecida Juliatti ◽  
Margarete Soares da Silva ◽  
Ervim Lenzi
Keyword(s):  
Sewage Sludge ◽  
Atomic Absorption ◽  
Metal Concentration ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Soil Samples ◽  
Treated Soil ◽  
Lead And Cadmium ◽  
No Absorption

Lead (Pb) behavior was studied in soil treated twice with sewage sludge contaminated with lead at interval of 18 months. Soil samples received five different treatments: three with lead [0 (reference); 2,500; 5,000 mug g-1] and two with a mixture of lead and cadmium (interferer) (2,500 + 2,500 and 5,000 + 5,000 mug g-1, respectively). Vases containing treated soil were cultivated with maize in a greenhouse for 75 days. Pb was extracted using nitric perchloric digestion and analyzed by atomic absorption spectroscopy. The soil, containing sewage sludge contaminated by lead presented a higher concentration of Pb. The metal concentration remained constant in all treatments at 20-60 cm depth. No absorption of Pb by the plants was detected.

Microwave acid dissolution of soil samples for elemental analysis

1990 ◽  
Vol 68 (2) ◽  
pp. 360-362 ◽  
Author(s):  
Byron Kratochvil ◽  
Sipho Mamba
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Soil Analysis ◽  
Soil Samples ◽  
Acid Dissolution ◽  
Flame Atomic Absorption ◽  
Trace Metal Determination ◽  
Microwave Dissolution

Closed vessel microwave acid dissolution is compared with conventional open vessel methods for the determination of trace zinc and copper in a series of soil samples collected from sugarcane fields in Swaziland. Analytical measurements by flame atomic absorption spectroscopy show that alt the zinc and copper in the samples is released within 7 min in a commercial microwave oven at 400 W. Up to seven 500-mg portions can be handled at a time. Attention must be paid to the amount of organic matter present in a soil so that excess pressure build up does not occur during dissolution. Keywords: microwave dissolution, soil analysis, trace metal determination, atomic absorption spectroscopy.

scholarly journals Determination Of The Mercury Content Of Lichens and Comparison To Atmospheric Mercury Levels In The South African Highveld Region

2012 ◽  
Vol 21 (1) ◽  
pp. 19-25 ◽  
Author(s):  
A. Trüe ◽  
N. Panichev ◽  
J. Okonkwo ◽  
P.B.C. Forbes
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Spectroscopic Method ◽  
Ambient Air ◽  
Sampling Interval ◽  
Atmospheric Mercury ◽  
Tree Bark ◽  
Mercury Vapour ◽  
Cold Vapour

The concentration of mercury vapour in ambient air is routinely determined using specialised instruments.As an economical alternative, actively pumped Hopcalite sorbent tubes can be used to trap atmosphericmercury, which is subsequently analysed by cold vapour atomic absorption spectroscopy. Plant materialsare also readily available in most regions and can be analysed to obtain information on time averagedatmospheric mercury levels.Lichen and tree bark samples were collected in the cities of Pretoria and Witbank, dried and acid digestedwith subsequent cold vapour atomic absorption spectroscopy. Average mercury concentrations rangingfrom 74 to 193 μg.kg-1 were found in lichens from three Pretoria suburbs, whilst average Hg levels of 228μg.kg-1 were determined in lichens collected in Witbank. The average mercury concentration in tree barkwas consistently lower than in lichens, with concentrations between 28 and 72 μg.kg-1 determined insamples from three Pretoria suburbs and 75 μg.kg-1 determined in samples taken in Witbank. This study isthe first in South Africa to determine mercury levels in lichens and tree bark.Average total gaseous mercury concentrations in ambient air at the three Pretoria suburban sites, asdetermined by a semi-continuous spectroscopic method using Hopcalite sampling, ranged between 1.6and 2.5 ng.m-3, while an average of 1.7 ng.m-3 was measured in Witbank over the sampling interval.

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