This study examines the role of tree canopies in processing atmospheric nitrogen (Ndep ) for four forests in the United Kingdom subjected to different Ndep : Scots pine and beech stands under high Ndep (HN, 13-19 kg N ha(-1)  yr(-1) ), compared to Scots pine and beech stands under low Ndep (LN, 9 kg N ha(-1)  yr(-1) ). Changes of NO3 -N and NH4 -N concentrations in rainfall (RF) and throughfall...

Soil cation-exchange capacity (CEC) is often determined by NH4 saturation, using a 1M solution of NH4C2H3O2 at pH 7. A study was conducted to ascertain whether this determination can be performed by employing a simple diffusion technique previously developed for direct inorganic-N analysis of soils. Values obtained for 10 diverse Illinois surface soils following overnight NH4 saturation were co...

A six months study was carried out in an alternative shrimp paddy cultivation plot situated Khulna District, Bangladesh. In soil, the mean values of sodium (Na) 13.33 mg l-1, calcium (Ca) 42.12 potassium (K) 472.50 iron (Fe) 1.01 phosphorus (P) 7.05 sulfur (S) 46.67 ammonium-nitrogen (NH4+-N) 247.68 nitrate-nitrogen (NO3--N) 114.78 pH 8.09, Electric conductivity (EC) 4.45 ms m-1, redox potentia...

Rainbow trout (Oncorhynchus mykiss) is one of the most-widely cultivated cold fresh water fish in the world. Gamasyab River, with a length of about 200 Km, is one of the longest rivers of Iran. The aim of this research is to determine the effects of trout farm effluents on this river water.  From a total of 24 trout farms in the area,  four farms were randomly selected and three sampling statio...

The century-old trickling filters at the Daspoort Wastewater Treatment Works in Pretoria (Gauteng, South Africa) are known for their remarkable removal of nitrogen from municipal wastewater. Our study was conducted to identify the microbiological processes responsible for this phenomenon and to establish whether anammox bacteria may be involved. An aerobic and anaerobic bench top reactor, both ...

In this study, a microbial fuel cell (MFC) that can achieve simultaneous anode anaerobic ammonium oxidation (anammox) and electricity generation (anode anammox MFC) by high-effective bacteria fed with purely inorganic nitrogen media was constructed. As the influent concentrations of (NH4+-N) nitrite (NO2−-N) gradually increased from 25 to 250 mg/L 33–330 mg/L, removal efficiencies NH4+-N, NO2−-...

Anaerobic Membrane Bioreactor technology has great advantages for treating wastewater, including energy recovery from organic matter. However, when the legislation requires that effluent standards be met in sensitive areas, this treatment cannot remove nutrients, thus permeate generated needs post-treatment. Apart biological processes, ion exchange is an alternative stream since it can nutrient...

In situ measurements of atmospheric NO3 and NH4 þ at Sandy Hook on the northern New Jersey (USA) coast and at Tuckerton on the southern New Jersey coast reveal significant temporal and spatial variations of these inorganic N constituents. The mean concentration of NO3 in precipitation was higher at Sandy Hook (44.6 lmol/L) than at Tuckerton (29.1 lmol/L). The mean concentration of NH4 þ in prec...