Geochemical cycling of heavy metals in a marine coastal area: benthic flux determination from pore water profiles and in situ measurements using benthic chambers

Hydrobiologia ◽  
1992 ◽  
Vol 235-236 (1) ◽  
pp. 501-517 ◽  
Author(s):  
G. Ciceri ◽  
Ciceri Maran ◽  
W. Martinotti ◽  
G. Queirazza
Keyword(s):  
Heavy Metals ◽  
Pore Water ◽  
Coastal Area ◽  
In Situ Measurements ◽  
Benthic Flux ◽  
Geochemical Cycling ◽  
Benthic Chambers ◽  
Flux Determination

scholarly journals Oxygen consumption and nutrient fluxes in coastal marine sediments off the Mejerda River delta (Gulf of Tunis)

2015 ◽  
Vol 16 (3) ◽  
pp. 636 ◽  
Author(s):  
M. A. HELALI ◽  
N. ZAABOUB ◽  
W. OUESLATI ◽  
A. ADDED ◽  
L. ALEYA
Keyword(s):  
Oxygen Consumption ◽  
General Scheme ◽  
Benthic Flux ◽  
River Delta ◽  
Diffusive Flux ◽  
Water Interface ◽  
Gulf Of Tunis ◽  
Coastal Marine ◽  
Benthic Chambers

The authors studied benthic flux of oxygen, alkalinity, and nutrients in situ at three points in the Mejerda River Delta at depths of 10m, 20m and 40m in March and August 2012. Three sedimentary cores were simultaneously drilled at the same locations to determine the diffusive flux of NO2-, NO3-, NH4+ and PO43- and to estimate diagenetic mechanisms occurring below the sediment-water interface. Photosynthesis was not sufficiently high during the day, and the oxygen consumption at sediment-water interface was about 1.7 to 10mmol/m²/day, essentially controlled by the degradation of organic matter and oxidation of reduced elements. Nitrate contents are relatively high in the sediment (above 140μM for NO3-)and their production is not always in conformity with the general scheme of early diagenesis, moreover, benthic flux between water and sediment are not clearly established. The diffusive flux of NH4+ and PO43- are always directed to the water column, at averages of 1.27μmol/m²/day for PO43- and 96.5μmol/m²/day for NH4+, complying with those measured by benthic chambers, but representing less than 30% of benthic fluxes for NH4+ and less than 5% for PO43-.

In-Situ Measurements of Pore Water Pressures in Landfilled Waste in Response to Liquids Addition

2008 ◽  
Author(s):  
Timothy G. Townsend ◽  
Ravi Kadambala ◽  
Sendhil Kumar ◽  
Pradeep Jain
Keyword(s):  
Pore Water ◽  
In Situ Measurements ◽  
Pore Water Pressures

Voltammetric in situ measurements of heavy metals in soil using a portable electrochemical instrument

Measurement ◽  
2007 ◽  
Vol 40 (9-10) ◽  
pp. 960-967 ◽  
Author(s):  
K. Christidis ◽  
P. Robertson ◽  
K. Gow ◽  
P. Pollard
Keyword(s):  
Heavy Metals ◽  
In Situ Measurements

Full Automatic Monitor for In-Situ Measurements of Trace Heavy Metals in Aqueous Environment

2011 ◽  
Vol 9 (1) ◽  
pp. 137-142 ◽  
Author(s):  
Wei Cai ◽  
Yi Li ◽  
Xiao-Ming Gao ◽  
Ping Wang
Keyword(s):  
Heavy Metals ◽  
In Situ Measurements ◽  
Aqueous Environment ◽  
Trace Heavy Metals
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