This paper presents a biological method for controlling odor problems caused by H2S originating from sewer networks under anaerobic conditions. The proposed method is based on the continuous addition of nitrate which oxidizes dissolved sulphide according to an autotrophic biological procedure and inhibits further sulphide production by sulphate reducing bacteria, until complete denitrification....

During an investigation of the effects of nutrients on formic hydrogenlyase activity in Escherichia coli, it was noted that the harvested cells possessed no measurable formic hydrogenlyase activity when grown in a basal medium composed of inorganic salts and glucose and containing NH4NOs as the sole source of nitrogen. This was in agreement with the data reported in a previous communication (Bi...

Mass, major ionic components (MICs) of PM2.5, and related gaseous pollutants (SO2, NO(x), NH3, HNO2, and HNO3) were monitored over six locations of different anthropogenic influence (industrial, urban, suburban, and rural) in Belgium. SO4(2-), NO3-, NH4+, and Na+ were the primary ions of PM2.5 with averages diurnal concentrations ranging from 0.4-4.5, 0.3-7.6, 0.9-4.9, and 0.4-1.2 microg m(-3),...

Here, we demonstrate whole-plant metabolic profiling by stable isotope labeling and combustion isotope-ratio mass spectrometry for precise quantification of assimilation, translocation, and molecular reallocation of (13)CO2 and (15)NH4NO3 The technology was applied to rice (Oryza sativa) plants at different growth stages. For adult plants, (13)CO2 labeling revealed enhanced carbon assimilation ...

Measurements of aerosol properties were made in aged polluted and clean background air masses encountered at the North Norfolk (UK) coastline as part of the TORCH2 field campaign in May 2004. Hygroscopic growth factors (GF) at 90% relative humidity (RH) for D0=27–217 nm particles and size-resolved chemical composition were simultaneously measured using a Hygroscopicity Tandem Differential Mobil...

Biological soil crusts (BSCs) cover >35% of the Earth's land area and contribute to important ecological functions in arid and semiarid ecosystems, including erosion reduction, hydrological cycling, and nutrient cycling. Artificial rapid cultivation of BSCs can provide a novel alternative to traditional biological methods for controlling soil and water loss such as the planting of trees, shrubs...

Many soil amendments are used to remediate paddy soils polluted with heavy metals, including arsenic (As) and lead (Pb). This study was conducted assess the efficacy of three inorganic amendments, such as calcium carbonate (CaCO3), sulfate (CaSO4), ferrous (FeSO4), on As Pb co-contaminated soils. The were applied alone and/or in combinations compare theirs for stabilization rice growth. In addi...

Our objective was to understand how mineral N availability alters accumulation of N reserves (nitrate, amino acids, soluble proteins and vegetative storage proteins known as VSP) in alfalfa (Medicago sativa L. cv Lodi) taproots. The effects of variation in NH4NO3 availability were followed by studying non-nodulated plants grown under hydroponic conditions during 21 days with (i) different N sup...