nitrate concentration Articles

  • Supercooled Liquid Water is Hazardous to our Health!

    What is Supercooled Liquid Water? Supercooled Liquid Water (SLW) refers to water droplets in a cloud that can stay in a liquid state at below freezing temperatures. If an airplane flies into these SLW droplets, icing on the wings and airframe can occur. ...

  • Micro Pulse Lidar: Perfect Tool for Atmospheric Research

    Micro pulse style lidars are active remote sensing tools proven to be highly useful in atmospheric research. This style of backscatter lidar has been around for decades; however, incremental improvements in photon counting, sensitivity, polarization, optical filters, coatings, and precision machining of each element support increasingly accurate analysis. Each iteration of the ...

  • Top 5 Differences between Micro Pulse LiDAR and Ceilometer Technology

    If you are evaluating backscatter LiDAR sensors for measuring aerosols, cloud vertical structure, and planetary boundary layer (PBL) heights, what factors should you consider in your comparison? It really comes down to a choice between the traditional analog technology used in ceilometers and the more recent advanced technology found in Micro Pulse LiDAR (MPL) sensors. ...

  • Nitrate Analysis of Water Samples Using a Benchtop UV-Vis Spectrophotometer

    Nitrogen is naturally found in groundwater and surface water in the form of nitrate, nitrite, or ammonium. The EPA has established a maximum contaminant level of nitrate-nitrogen in potable water of 10ppm. This application presents results of UV-Vis analysis of nitrate concentrations in drinking water, ground water, and industrial wastewater, showing that the manual colorimetric method is ...

  • Algae Problems

    Almost everywhere where water is being stored, algae problems may occur. When water is stagnant, has a high temperature or a high concentration of Nitrates and Phosphates, an algae bloom might occur, which can cause several problems. Blue-green algae growth can cause a foul odour to the water, a layer of scum on the surface and even pose a health risk. Green algae may colour the water green, look ...


    By LG Sonic

  • Pollution of surface runoff from the territory of Brest, Belarus

    The assessment of the influence of urban surface runoff on the quality of river water in the city of Brest was made. Surface runoff was studied in two phases (winter and summer) for the following parameters: pH, total suspended solids (TSS), concentration of chloride, nitrate, phosphate and ammonium ions, total oils. The results show that urban surface runoff is an important source of pollution ...


    By IWA Publishing

  • The denitration pathway of p-nitrophenol in the hydrogen peroxide catalytic oxidation with an FeIII-resin catalyst

    The liquid-phase hydrogen peroxide catalytic oxidation of p-nitrophenol was performed with an FeIII-resin catalyst. The conversion and mineralization of p-nitrophenol was effectively achieved at mild reaction conditions with the FeIII-resin catalyst. It was found that the oxidant concentration, pH, and temperature dominated the degradation rate of p-nitrophenol. ...


    By IWA Publishing

  • CL-Out In Situ Bioremediation of Perchlorate

    CL-Out is a consortium of facultative aerobic organisms that are well know for their ability to utilize nitrates.  CL-Out is generally used for the aerobic cometabolism of PCE and other chlorinated solvents.  As the half-reaction for perchlorate is close to that of nitrate, CL-Out cometabolism of perchlorate was successfully tested in the laboratory.  In addition to laboratory ...


    By CL Solutions, LLC

  • Manufacturer of Electrical Appliances - Case Study

    Denitrification of wastewater with electrodialysis A manufacturer of electrical appliances uses sodium nitrate solution for an electrochemical etching process. The sodium nitrate created concentrations of nitrate in the wastewater that were too high discharging in the sewage system. Options for treatment were biological denitrification or electrodialysis. After comparing both solutions, ...


    By Paques Technology B.V.

  • Analysis of polycyclic aromatic hydrocarbons by sensitized room temperature phosphorescence

    Abstract Direct and selective simultaneous determination of several polycyclic aromatic hydrocarbons by sensitized room temperature phosphorescence in sodium dodecylsulphate micellar solutions was studied. This approach improved, for example, the selectivity factor in determining pyrene in the presence of fluoranthene by a factor of 350, and determined benz[a]anthracene and anthracene in the ...


    By Springer

  • Degradation of tetracycline in water by ultrasonic irradiation

    The objective of this work is to investigate the effectiveness of ultrasonic radiation for the degradation of tetracycline. We analyzed the influence of several operational parameters, including the solution pH, ultrasonic power, initial concentration of tetracycline, H2O2 addition, and the most common anions in surface waters such as bicarbonate, nitrate and sulfate. The results showed ...


    By IWA Publishing

  • Distribution and characterisation of nitrogen-utilising bacteria in a eutrophic shallow lake in eastern China

    To elucidate the roles of microorganisms in the nitrogen geo-chemical cycle, the distributions of nitrogen-utilising bacteria were studied in a small eutrophic lake. Ammonifiers, nitrogen fixers and nitrate reducers were more concentrated at the severely polluted Xili sub-area than at the Centre of Outer (CO), whereas the contrary was true for autolithotrophic nitrifiers. Molecular identification ...


    By Inderscience Publishers

  • Selective nitrogen determination methods related to Kjeldahl

    KjelMaster System K-375 / K-376, KjelDigester K-449, Scrubber K-415 85 % of the world’s nitrogen demand for fertilizer is primarily derived from ammonia in the form of urea, ammonium nitrate, phosphate and sulfate. Ammoniacal components can also be found in soil, sludge and bio waste. In those sample matrices, a mixture of several nitrogen containing compounds as urea, nitrogen from ...


    By BÜCHI Labortechnik AG

  • Treatment of slaughterhouse plant wastewater by using a membrane bioreactor

    The use of a membrane bioreactor (MBR) for removal of organic substances and nutrients from slaughterhouse plant wastewater was investigated. The chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations of slaughterhouse wastewater were found to be approximately 571 mg O2/L, 102.5 mg/L, and 16.25 mg PO4-P/L, respectively. A submerged type membrane was used in ...


    By IWA Publishing

  • Quaternised biomass as anion exchanger for the removal of fluoride from water

    Dried Chinese Reed, a fast growing plant, was used as a model biomass for the development of anion exchangers using a quaternisation agent, N-(3-chloro-2-hydroxypropyl) trimethylammonium chloride (CHMAC), for the removal of fluoride from water. Parameters investigated in the adsorption studies include F− concentration, agitation time, adsorbent dose and pH. Equilibrium adsorption data followed ...


    By Inderscience Publishers

  • Modelling changes of aerosol compositions over Belgium and Europe

    Seasonal changes in aerosol compositions over Belgium and Europe are simulated with an extended version of the EUROS model. EUROS is capable of modelling mass and chemical composition of aerosols in two size fractions (PM2.5 and PM10-2.5). The chemical composition is expressed in terms of seven components: ammonium, nitrate, sulphate, primary inorganic compounds, elementary carbon, primary ...


    By Inderscience Publishers

  • Monitoring of phytoplankton biomass and nutrients in a polluted stream

    The spatial and temporal variations in the concentrations of nutrients (NH4+, NO2−, PO43−, SiO4−) and chlorophyll a were monitored simultaneously in a slow-flowing watercourse (Saricay Stream, Turkey), which runs in a ruralurban gradient. Chlorophyll a concentrations ranged between 0.044 g l-1 and 206.15 g l-1 and, in general, the higher concentrations of chlorophyll a and ammonium were measured ...


    By Inderscience Publishers

  • Improvement of two-photon induced photoreduction by using a metal ion solution with a high concentration of silver ions

    Fabrication of three-dimensional metallic microstructures is an important issue for various applications in electronics and nanophotonics. Precise metallic micropatterns were fabricated by the two-photon induced photoreduction (TPPR) process. The process employs the photoreduction of silver ions in a metal ion solution composed of silver nitrate (AgNO3) and water-soluble polymer ...


    By Inderscience Publishers

  • Drinking Water Resource Protection, Germany

    Reference Project: Drinking Water Resource Protection, Germany In the catchment area of a major drinking water supplier in western Germany increasing nitrate concentrations were noticed within a deep water-bearing layer. Although high nitrate concentrations, resulting from regional intensive application of fertilizers, were known from shallow layers in the area, they were new to the deep ...

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