Precipitation of Calcium from Seawater Using CO2

被引：2
|
作者：
Zhang, Jijun [1 ]
Yuan, Junsheng [1 ]
Li, Xia [1 ]
机构：
[1] Hebei Univ Technol, Beijing, Peoples R China
来源：
FUNDAMENTAL OF CHEMICAL ENGINEERING, PTS 1-3 | 2011年 / 233-235卷
关键词：
Carbon dioxide; Precipitation; seawater; calcium; DESALINATION; CARBONATE;
D O I：
10.4028/www.scientific.net/AMR.233-235.747
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Researches on precipitation of calcium from seawater have been carried out using CO2. The effect of pH value on calcium removals from seawater was investigated. It was found that it is easier to remove calcium from seawater at a higher pH value, and the removal rate of calcium can reach 60% to 90% when the pH value is from pH 8.0 to pH 9.0. The precipitated solids were characterized using X-ray diffraction (XRD) analysis. The results show that they consist of CaCO3 center dot H2O at pH 8.0 to pH 8.7, of CaCO3 center dot H2O and MgCO3 center dot 3H(2)O at more than pH 9.0.
引用
收藏
页码：747 / 752
页数：6
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