Soil contamination represents an environmental issue which has become extremely important in the last decades due to the diffusion of industrial activities. Accidents during transport of dangerous materials and fuels may cause severe pollution. The present paper describes the criteria of the actions which were operated to remediate the potential risk and observed negative effects on groundwater...

A stationary bubble-swarm has been used to aerate a mammalian cell culture bioreactor with an extremely low gas flow rate. Prolonging the residence time of the gas bubbles within the medium improved the efficiency of the gas transfer into the liquid phase and suppressed foam formation. An appropriate field of speed gradients prevented the bubbles from rising to the surface. This aeration method...

Rationale The dual isotope ratio analysis, carbon (?13C value) and hydrogen (?2H value), of methane (CH4) is a valuable tracer tool within range areas scientific investigation, not least wetland ecology, microbiology, CH4 source identification the tracing geological leakages thermogenic in groundwater. Traditional methods collecting, purification, separating analysing for ?13C ?2H determination...