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Release of phosphorus from calcium phosphate by fulvic acid extracted from lake sediments

Journal of Japan Society on Water Environment Volume 17 Issue 9 Page 596-599
published_at 1994
2007020042.pdf
[fulltext] 1.34 MB
Title
湖沼堆積物から抽出したフルボ酸によるリン酸カルシウムからのリンの溶出
Release of phosphorus from calcium phosphate by fulvic acid extracted from lake sediments
Creators Usui Keiji
Creators Shindo Haruo
Creators Marumoto Takuya
Creators Kishino Takuo
Creator Keywords
release of phosphorus fulvic acid molecular weight lake sediments
A release of phosphorus from calcium phosphate, iron(III) phosphate, and aluminum phosphate owing to the complex formation of their metals with fulvic acid was examined. Fulvic acid was extracted from lake sediments and treated with Amberlite XAD-8 resin. The non-adsorbed fraction of fulvic acid on the resin, which has highly Cu2+-complexing capacity, was used in this study, because the adsorbed fraction has only little Cu2+-complexing capacity as reported in our previous paper. The non-adsorbed fraction was able to release phosphorus from calcium phosphate, but not from iron(III) phosphate, and aluminum phosphate. The application of X-ray analysis to the calcium phosphate indicated that the major component is hydroxyapatite. The stability constant of the Cu2+-fractionated fulvic acid was determined to be 2×10(5) (log K=5.3) and the average molecular weight of the fulvic acid was 1,026.
Subjects
農学 ( Other)
Languages jpn
Resource Type journal article
Publishers 日本水環境学会
Date Issued 1994
Rights
この論文は「水環境学会誌」に掲載されたものであり、著作権は(社)日本水環境学会に帰属します。()
File Version Version of Record
Access Rights open access
Relations
[ISSN]0916-8958
[NCID]AN10372439
Schools 農学部