Evaluation of Si availability in slag fertilizers by an extraction method using a cation exchange resin

Autor:	Naoto Kato, Naoto Owa
Rok vydání:	1997
Předmět:	Chemistry Extraction (chemistry) Inorganic chemistry Soil Science Slag Soil chemistry Mineralogy Plant Science Buffer solution Industrial waste chemistry.chemical_compound visual_art visual_art.visual_art_medium Solubility Ion-exchange resin Dissolution
Zdroj:	Soil Science and Plant Nutrition. 43:351-359
ISSN:	1747-0765 0038-0768
DOI:	10.1080/00380768.1997.10414759
Popis:	A new extraction method for the evaluation of Si availability in slag fertilizers was developed based on findings on the dissolution process of the slags in paddy fields. In the method, the slags were dissolved in water with the addition of a weakly acidic cation exchange resin (H form). The effects of the slag/water ratio, the amount of resin, and temperature on the Si dissolution from the slags were examined in order to determine adequate extraction conditions. The Si dissolution from the slags was enhanced by the addition of the resin. The pH of the extractant was well controlled between 6 and 7 during the extraction. The percentage of the amount of Si extracted by traditional evaluation methods using 0.5 м HCl or an acetate buffer solution to the total amount of Si in the slags was much higher than the Si recovery rate by rice plant (Oryza sativa L. var. Nihonbare) which was measured in our previous study. Moreover, there was no correlation between these values. On the other hand, the percent...
Databáze:	OpenAIRE
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