CAJ | 학술논문

对CO2法脱除海水中钙离子和镁离子进行研究,控制海水的pH值恒为8,考察温度、盐度对脱钙率和脱镁率的影响。结果表明,盐度35‰的海水,30～50℃时脱钙率由90%增长至95%,与此同时脱镁率由0增长至42%;脱钙率、脱镁率随温度升高而升高。在温度为30℃时,盐度35‰～105‰的海水脱钙率可由90%增长到97%,与此同时脱镁率由0增长到67%;脱钙率、脱镁率随盐度升高而升高。将得到的固体进行XRD检测可知,产物固相组成随温度、盐度的变化而变化。由此可知,海水盐度为35‰、pH值为8、温度为30℃是CO2法高效脱钙的最佳工艺条件。
대CO2법탈제해수중개리자화미리자진행연구,공제해수적pH치항위8,고찰온도、염도대탈개솔화탈미솔적영향。결과표명,염도35‰적해수,30～50℃시탈개솔유90%증장지95%,여차동시탈미솔유0증장지42%;탈개솔、탈미솔수온도승고이승고。재온도위30℃시,염도35‰～105‰적해수탈개솔가유90%증장도97%,여차동시탈미솔유0증장도67%;탈개솔、탈미솔수염도승고이승고。장득도적고체진행XRD검측가지,산물고상조성수온도、염도적변화이변화。유차가지,해수염도위35‰、pH치위8、온도위30℃시CO2법고효탈개적최가공예조건。
Precipitation of calcium and magnesium from seawater using CO2,the seawater of pH value in 8,the effects of the temperature and salinity were investigated in this research.When the salinity of seawater was 35‰,the removal rate of calcium increased from 90% to 95% when the temperature from 30 ℃ to 50 ℃.Meanwhile,the removal rate of magnesium was increased from 0 to 42%;the removal rate of calcium and magnesium also increased with the increasing temperature.When the temperature of seawater was 30 ℃,removal rate of calcium increased from 90% to 97% when salinity increased from 35‰ to 105‰.The removal rate of magnesium increased from 0 to 67%,the removal rate of calcium and magnesium increased with the increasing salinity as well.Solids precipitation was characterized using X-ray diffraction(XRD) analysis.The composition of precipitated solids varied with the changes in temperature and salinity.The optimum conditions of calcium removal from seawater under the experimental conditions in this paper were:temperature 30 ℃ and salinity 35‰.