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Januarti Jaya Ekaputri


An experimentally observation was conducted to determine boron in fly ash with Inductively Coupled
Plasma Spectrometry (ICPS). Sample of solution from fly ash mixed with distilled water was analyzed for
pH, agitation time, boron concentration and temperature. It was revealed that fly ash released soluble boron
rapidly about 25%-30% from total boron content. Desorption of boron ions occurred afterwards. After
immersion in more than one day, sorption of boron by fly ash increased with increasing pH, up to 13. The
equilibrium state transpires after fly ash contact with water. Aluminum borates may release soluble boron to
the solution while alkalinity of fly ash is believed to lead particles on fly ash surface to capture boron ions.

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