Minimal liquid discharge (MLD) in greenhouses minimizes the volume of discharged wastewater, thereby increasing effluent that may be reused. Sodium accumulation wastewater is often considered main bottleneck to achieving 100% reuse. Consequently, have begun adopting reverse osmosis (RO), most commonly used desalination technology for treatment. RO removes ions from indiscriminately, including m...

objective: very recent studies have reported positive effects of dietary nitrate on the oxygen consumption during exercise. this research aimed to study the effect of moderate dose of high-nitrate vegetables, watercress (nasturtium officinale) and red radish (raphanus sativus) compared with a control group on the incremental treadmill exercise test following a standard bruce protocol controlled...

Abstract Deep tropical soils with net anion exchange capacity can adsorb nitrate and might delay the eutrophication of surface waters that is often associated many temperate croplands. We investigated soil pools in deep Southern Brazilian Amazon, where conversion forest Cerrado to intensive fertilized soybean soybean-maize cropping expanded rapidly 2000s. found mean top 8 m increased from 143 k...

Background: Surface water and groundwater pollution with various forms of nitrogen such as ammonium and nitrate ions is one of the main environmental risks. The major objectives of this study were to evaluate the capacity of natural zeolite (clinoptilolite) to remove NO3- and NH4+ from polluted water under both batch and column conditions. Methods: The laboratory batch and column experiments we...

The removal of nitrogen from wastewaters is great importance due to the harmful effects in environment. In this study, nitrate two underground mine waters was investigated by strong anion exchange resins (Lewatit MonoPlus SR 7 (referred as SR7, macroporous), Purolite A520E (A520E, A300E (A300E, gel)) continuous-flow columns. Both had similar concentrations (NO3-N: Mine A 32 mg/l and B 37 mg/l) ...

A passive sampler device for the kinetic accumulation of nitrate (NO3(-)) and phosphate (HPO4(2-)) in water was developed and calibrated. The sampler incorporates an ion-exchange disk as the receiving phase and selectively collects nitrate and phosphate at sampling rates of 197 ± 43 and 75 ± 12 mL per day, respectively. Minimum exposure times under nutrient rich and nutrient poor conditions wer...

A highly sensitive, fast, and stable conductometric enzyme biosensor for the determination of nitrate in water is described and validated in natural water samples. The nitrate biosensor is based on a methyl viologen mediator mixed with nitrate reductase (NR) from Aspergillus niger and Nafion® cation-exchange polymer dissolved in a plasticized PVC membrane deposited on the sensitive surface of i...

Electrode potential measurements have been applied to study electrical characteristics like transport numbers, permselectivity & fixed charged density of zirconium phosphoborate ion exchange membranes. The potential measurements were made across the cation exchange membrane maintained at 27±0.1 °C, using halide and nitrate salts of alkali and alkaline earth metals as electrolytes. The membrane ...