High-resolution time series of physical and bio-optical data were obtained using moored and bottom-mounted instruments on the southern New England continental shelf during the Coastal Mixing and Optics experiment (CMO) from July 1996 through June 1997. The most prominent physical and bio-optical signals observed during the experiment were associated with the seasonal variability. However, sever...

Riverbank filtration (RBF) is an important part of the surface water–groundwater cycle, and it intercepts retains many pollutants in rivers. However, RBF affects biogeochemical process which enables aquifer sediments to release iron (Fe) manganese (Mn). In this study, column experiments were performed investigate effects ammonium ions organic matter on Fe Mn from anaerobic sediments. addition, ...

A recent macroscopic theory of biphasic flow in porous media [R. Hilfer, Phys. Rev. E 73, 016307 (2006)] has proposed to treat microscopically percolating fluid regions differently from microscopically nonpercolating regions. Even in one dimension the theory reduces to an analytically intractable set of ten coupled nonlinear partial differential equations. This paper reports numerical solutions...

Mercury, with its reactive forms being the most deleterious for the trophic chains, has been identified as a major pollutant in a few confined bodies of the coastal zone. Due to feeding, burrowing, and bioirrigation activities, infauna are known to play a crucial role in the biogeochemical processes of contaminants. The main goal of the present study is to evaluate the effects of Hediste divers...

Citric acid (CA) was evaluated in terms of its efficiency as a biodegradable chelating agent, in removing zinc (Zn) from heavily contaminated soil, using a soil washing process. To determine preliminary ranges of variables in the washing process, single factor experiments were carried out with different CA concentrations, pH levels and washing times. Optimization of batch washing conditions fol...

The total column ozone data from SCIAMACHY were monitored in the ozone data assimilation system at NASA’s Data Assimilation office (DAO). The ozone data from NOAA−16 Solar Backscatter UltraViolet/2 (SBUV/2) instrument are assimilated in the DAO’s system. The monitoring consists of computing the differences between SCIAMACHY observations and the ozone system forecast, i.e. observed−minus−forecas...

In this study the main physical-chemical characteristics of red ferralitic soil to use as substrate in subsurface wetlands was determined. The P-removal was evaluated in a short-term isotherm batch experiment and in a column percolation experiment. The acid characteristic and high content of iron minerals in the red ferralitic soil facilitated the phosphorus removal. Also the sorption isotherms...

Building on previous research on the origin and homochirality of life, this study focuses on analyses profiling important building blocks of life: the natural amino acids. The spark discharge variation of the iconic Miller experiment was performed with a reducing gas mixture of ammonia, methane, water and hydrogen. Amino acid analysis using liquid chromatography coupled with tandem mass spectro...

Injection of organic carbon into the subsurface as an electron donor for bioremediation of redox-sensitive contaminants like uranium often leads to mineral transformation and biomass accumulation, both of which can alter the flow field and potentially bioremediation efficacy. This work combines reactive transport modeling with a column experiment and field measurements to understand the biogeoc...