To inform cost-effective monitoring of offshore geological storage carbon dioxide (CO2), a unique field experiment, designed to simulate leakage CO2 from sub-seafloor reservoir, was carried out in the central North Sea. A total 675 kg were released into shallow sediments (?3 m below seafloor) for 11 days at flow rates between 6 and 143 d-1. set natural, inherent tracers (13C, 18O) injected adde...

Geochemical evaluation of the sources and movement of saline groundwater in coastal aquifers can aid in the initial mapping of the subsurface when geological information is unavailable. Chloride concentrations of groundwater in a coastal aquifer near San Diego, California, range from about 57 to 39,400 mg/L. On the basis of relative proportions of major-ions, the chemical composition is classif...

Soil alkalinisation generally constitutes a major threat to irrigated agriculture in the semiarid regions of West Africa. The improvement of sodic soils is generally difficult and expensive. However, a recent study in the Niger valley in NIGER, reveals that a natural dealkalinisation is possible under natural conditions in a semi-arid climate. Transformation of non-saline sodic soil into brown ...

The effective geological storage of liquid CO2 in porous subsurface rock will require the ability to track, and identify the origin of, any CO2 seepage measured at the near-surface. In a study relevant to postemplacement seepage, we examine natural CO2 springs around Green River, on the Colorado Plateau USA, in an attempt to determine the CO2 origins. We use a combination of natural geochemical...

Abstract. Tracing the origin of sediment is needed to improve our knowledge hydro-sedimentary dynamics at catchment scale. Several fingerprinting approaches have been developed provide this crucial information. In particular, spectroscopy provides a rapid, inexpensive and non-destructive alternative technique conventional analysis geochemical properties. Here, we investigated performance four m...

The accuracy of the fluorescent (FM) and radioactive microsphere (RM) techniques is similar in acute experiments but has not been established in chronic experiments. In the present study various combinations (at least pairs) of FM and/or RM labels were injected simultaneously between 2 mo and 5 min before each animal was killed. Blood flow was determined in many organs. Intramethod mean differe...

sediment fingerprinting is a method for identifying sediment sources and determining the rate of contribution of each source. in this method, the natural tracer technology is used, that combined from samples collection, laboratory analyzing and statistical modeling. the natural tracers are measured in both the sources and suspended sediment to determine the rate of contribution each sources. th...

Oil sands operations in Alberta, Canada generate large volumes (> 840×10m) of oil sands process-affected water (OSPW) that contains contaminants that are toxic to aquatic life. OSPW is stored in open tailings ponds and leakage from the ponds presents a potential long-term environmental risk. However, the presence of naturally occurring saline water in the oil sands region in Alberta presents a ...