You are signed in as:
  • IFPRI
  • Signed in via:
  • IP Address

  • Choose a colour
  • Effects of temperature and activation on biochar chemical properties and their impact on ammonium, nitrate, and phosphate sorption.

    Author(s) : Zhang, H.Voroney, R. P.Price, G. W.

    Author Affiliation : School of Environmental Sciences, Univ. of Guelph, Guelph, ON, N1G 2W1, Canada.

    Author Email : hongjie.zhang@agr.gc.ca

    Journal article : Journal of Environmental Quality 2017 Vol.46 No.4 pp.889-896

    Abstract : There have been limited studies of how pyrolysispyrolysisSubject Category: Techniques, Methodologies and Equipment
    see more details
    temperaturetemperatureSubject Category: Properties
    see more details
    and activation processes alter the chemical propertieschemical propertiesSubject Category: Properties
    see more details
    of biochar and how these changes influence ammonium (NH4+), nitrate (NO3-), and phosphatephosphateSubject Category: Chemicals and Chemical Groups
    see more details
    (PO43-) sorptionsorptionSubject Category: Natural Processes
    see more details
    . This study compared the chemical properties of biochars and activated biochars (ActBC with steamsteamSubject Category: Miscellaneous
    see more details
    and CO2 activation) produced by slow pyrolysis at 200 (BC200), 400 (BC400), 600 (BC600), 800 (ActBC200, ActBC400, ActBC600), and 850°C (sulfachar-S enriched biochar with steam activation). Quantitative solid-state 13C nuclear magnetic resonance spectroscopynuclear magnetic resonance spectroscopySubject Category: Techniques, Methodologies and Equipment
    see more details
    and elemental analysisanalysisSubject Category: Techniques, Methodologies and Equipment
    see more details
    were used to study temperature and activation on biochar chemical properties. The sorption capacity of biochars for NH4+, NO3-, and PO43- were measured by batch sorption experiments. Nuclear magnetic resonance spectroscopy data showed that BC200 contained mainly aliphatic C compounds (86% of O-alkyl) belonging to cellulosecelluloseSubject Category: Chemicals and Chemical Groups
    see more details
    and hemicellulose, whereas BC400 and BC600 compositioncompositionSubject Category: Properties
    see more details
    was dominated by fused aromatic C structuresstructuresSubject Category: Infrastructure
    see more details
    , containing 81 and 97% aromatic C, respectively. Increasing pyrolysis temperatures decreased biochar total C but increased its cation exchange capacitycation exchange capacitySubject Category: Properties
    see more details
    , pH, and contents of total N and P, calciumcalciumSubject Category: Chemicals and Chemical Groups
    see more details
    , potassiumpotassiumSubject Category: Chemicals and Chemical Groups
    see more details
    , and magnesiummagnesiumSubject Category: Chemicals and Chemical Groups
    see more details
    . The BC200 released NO3- and PO43-, whereas sulfachar and ActBC200 sorbed significantly higher amounts NO3- and PO43- than BC600 by 83 and 96%, respectively, across aqueous solutions. Sulfachar and BC400 sorbed significantly greater amounts NH4+ than did the other biochars. This study shows that production temperature significantly affects biochar chemical properties and that activation increases NO3- and PO43- sorption. These results suggest that activated biochar could be useful for sorbing soil N and P, thereby reducing leachingleachingSubject Category: Miscellaneous
    see more details
    losseslossesSubject Category: Properties
    see more details
    .

    ISSN : 0047-2425

    DOI : 10.2134/jeq2017.02.0043

    Record Number : 20173323969

    Publisher : American Society of Agronomy

    Location of publication : Madison

    Country of publication : USA

    Language of text : English

    Indexing terms for this abstract:

    Descriptor(s) : ammonium nitrateammonium nitrateSubject Category: Chemicals and Chemical Groups
    see more details
    , analysisanalysisSubject Category: Techniques, Methodologies and Equipment
    see more details
    , calciumcalciumSubject Category: Chemicals and Chemical Groups
    see more details
    , capacitycapacitySubject Category: Properties
    see more details
    , carboncarbonSubject Category: Chemicals and Chemical Groups
    see more details
    , cation exchangecation exchangeSubject Category: Natural Processes
    see more details
    , cation exchange capacitycation exchange capacitySubject Category: Properties
    see more details
    , cellulosecelluloseSubject Category: Chemicals and Chemical Groups
    see more details
    , charcoalcharcoalSubject Category: Commodities and Products
    see more details
    , chemical propertieschemical propertiesSubject Category: Properties
    see more details
    , compositioncompositionSubject Category: Properties
    see more details
    , environmentenvironmentSubject Category: Miscellaneous
    see more details
    , environmental assessmentenvironmental assessmentSubject Category: Techniques, Methodologies and Equipment
    see more details
    , hemicelluloseshemicellulosesSubject Category: Chemicals and Chemical Groups
    see more details
    , leachingleachingSubject Category: Miscellaneous
    see more details
    , losseslossesSubject Category: Properties
    see more details
    , magnesiummagnesiumSubject Category: Chemicals and Chemical Groups
    see more details
    , nitratenitrateSubject Category: Chemicals and Chemical Groups
    see more details
    , nitrogennitrogenSubject Category: Chemicals and Chemical Groups
    see more details
    , nuclear magnetic resonancenuclear magnetic resonanceSubject Category: Miscellaneous
    see more details
    , nuclear magnetic resonance spectroscopynuclear magnetic resonance spectroscopySubject Category: Techniques, Methodologies and Equipment
    see more details
    , phosphatephosphateSubject Category: Chemicals and Chemical Groups
    see more details
    , phosphorusphosphorusSubject Category: Chemicals and Chemical Groups
    see more details
    , potassiumpotassiumSubject Category: Chemicals and Chemical Groups
    see more details
    , propertiespropertiesSubject Category: Properties
    see more details
    , pyrolysispyrolysisSubject Category: Techniques, Methodologies and Equipment
    see more details
    , sorptionsorptionSubject Category: Natural Processes
    see more details
    , spectroscopyspectroscopySubject Category: Techniques, Methodologies and Equipment
    see more details
    , steamsteamSubject Category: Miscellaneous
    see more details
    , structuresstructuresSubject Category: Infrastructure
    see more details
    , temperaturetemperatureSubject Category: Properties
    see more details