Essays about: "NH4 ions"

Found 4 essays containing the words NH4 ions.

  1. 1. Atmospheric mercury deposition in alpine snow, northern British Columbia and southwestern Yukon, Canada

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Pia Karlsson; [2014]
    Keywords : ;

    Abstract : High mercury (Hg) levels have been measured in fish in Kusawa Lake (KL), a subalpine, partly glacier-fed lake situated in the southwestern Yukon, Canada, but it is presently unknown where this Hg comes from. One possible source may be atmospheric deposition of Hg in snow and subsequent release by melt into the lake. READ MORE

  3. 2. Ammonium and orthophosphate ions removal from source separated human urine using dual reactive filters: A small scale laboratory study in a batch mode.

    University essay from KTH/Mark- och vattenteknik

    Author : Prayash Khanal; [2013]
    Keywords : Reactive filters system; Urine; Nutrients removal; Polonite; Mordenite; Batch mode;

    Abstract : The nutrients available in urine make it a good resource as fertilizer. Limited availability of natural phosphorus (P) is compelling people to think about recovering and returning it back to the land from waste stream. READ MORE

  4. 3. Identifying possible sources of ammonium ions and arsenic in groundwater in the Nam Du area, Vietnam

    University essay from SLU/Dept. of Soil Sciences

    Author : Peter Harms-Ringdahl; [2007]
    Keywords : groundwater; contamination sources; ammonium ions; arsenic species; redox potential; stable isotopes; Hanoi; Vietnam;

    Abstract : Concentrations of arsenic and ammonium ions well above drinking water standards have been detected in aquifers which supply Hanoi, the capital of Vietnam, with fresh water. Chemical analyses showed arsenic and ammonium ion concentrations varying between 27 – 264 μg/l in freshwater and 1.8 – 34.7 mg/l in groundwater. READ MORE

  5. 4. Identification and determination of NH4+ ions in D-Ala-NH2∙HCl drug substance by Ion Chromatography (IC)

    University essay from Malmö högskola/Fakulteten för teknik och samhälle (TS)

    Author : Zenith Khan; Sara Salim; [2005]
    Keywords : Identification; determination; NH4 ions;

    Abstract : The quality control laboratory at PolyPeptide has been performing analysis based on ion chromatography (IC) of peptides. A method for separation of negative ions (acetate, chloride etc) is already in use. Lately there has been a need for developing a method to separate positive ions, like ammonium ions, in peptides. READ MORE