Biochar-Ion Interactions: An Investigation of Biochar charge and its effect on ion retention

David Waters, Jason Condon, Lukas Van Zwieten, Juan Moroni

Research output: Book chapter/Published conference paperConference paperpeer-review


The method of measuring exchangeable cations as an approximation for cation exchange capacity was examined using a cow manure and green waste biochar. Both biochars were pre-treated by shaking with water over a range of times. Leachates were analysed, and the pre-treated biochars were then treated with two solutions (0.1M BaCl2 or 0.1M CsCl) to measure ion adsorption. Pre-treatment shaking had a significant effect on ion adsorption for both biochars. Ion adsorption for the green waste biochar was significantly increased with pre-treatment shaking, whereas it decreased for the cow manure biochar. Compulsive exchange of cations to determine the ability of a substrate to retain positively charged ions on its surface may not be an appropriate method for biochar.
Original languageEnglish
Title of host publication19th proceedings
Subtitle of host publicationSoil Solutions for a Changing World
EditorsRobert Gilkes
Place of PublicationCrawley
PublisherInternational Union of Soil Sciences
Number of pages4
ISBN (Electronic)9780646537832
Publication statusPublished - 2010
EventWorld Congress of Soil Science - Brisbane, Australia, Australia
Duration: 01 Aug 201006 Aug 2010


ConferenceWorld Congress of Soil Science

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