EFFECTS OF CALCIUM-BINDING POLYSACCHARIDES FROM CALCAREOUS ALGAE ON CALCIUM-CARBONATE POLYMORPHS UNDER CONDITIONS OF DOUBLE DIFFUSION

被引：70

作者：

WADA, N ^{[1
]}

OKAZAKI, M ^{[1
]}

TACHIKAWA, S ^{[1
]}

机构：

[1] TOKYO GAKUGEI UNIV,DEPT BIOL,KOGANEI,TOKYO 184,JAPAN

来源：

JOURNAL OF CRYSTAL GROWTH | 1993年 / 132卷 / 1-2期

关键词：

D O I：

10.1016/0022-0248(93)90253-S

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The effects of calcium-binding acid polysaccharides from magnesian-calcite-depositing algae, and a potent scale inhibitor, hydroxyethylidene 1,1-diphosphonic acid (HEDP), on CaCO3 Polymorphs were studied by a double diffusion technique. Magnesian calcite was formed with aragonite by adding the acid polysaccharides or HEDP to the agar-gel even in the presence of Mg2+ in Ca2+ solution (Ca2+ concentration, 0.1M; Ca2+/Mg2+ = 2.0), and the ratio of magnesian calcite to aragonite increased with increasing amounts of the additives. These results suggest that magnesian calcite was formed by transformation of aragonite nuclei into calcite ones with the inhibition of aragonite growth by acid polysaccharides or HEDP. The effects of the acid polysaccharides explain the occurrence of magnesian calcite in these algae.

引用

页码：115 / 121

页数：7

共 18 条

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