COPRECIPITATION OF PHOSPHATE WITH CALCIUM-CARBONATE IN LAKE VELUWE

被引：68

作者：

DANENLOUWERSE, HJ ^{[1
]}

LIJKLEMA, L ^{[1
]}

COENRAATS, M ^{[1
]}

机构：

[1] WAGENINGEN UNIV AGR,DEPT WATER QUAL MANAGEMENT & AQUAT ECOL,6700 DD WAGENINGEN,NETHERLANDS

来源：

WATER RESEARCH | 1995年 / 29卷 / 07期

关键词：

CALCITE; COPRECIPITATION; PHOSPHATE; PH;

D O I：

10.1016/0043-1354(94)00301-M

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Coprecipitation of dissolved phosphate with calcite (CaCO3) has been observed in many lakes. In 1979/1980 white flocks occurred in Lake Veluwe after the inlet of water with a high calcium content. A high oversaturation with respect to calcite occurred at that time, presently (1985-1987) the oversaturation is much smaller. The intense photosynthesis decreased and maximum summer pH values came down from 10.0 to about 8.5. In laboratory experiments the coprecipitation of phosphate with calcite occurred only when the crystalization was initiated by adding seeds of calcite. Literature and this research show that the incorporation efficiency of phosphate decreases at lower phosphate concentrations. Literature data for the incorporation of P in CaCO3 in mg P [g Ca](-1) are fitted as 10.9 x [P](0.5) with r(2)=0.50. The coprecipitation at the actual low phosphate concentration in Lake Veluwe (1993) is not as efficient as in the period 1985-1987.

引用

页码：1781 / 1785

页数：5

共 14 条

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