从扇贝壳制取活性氧化钙及其抑菌效果初探

Peparation of Activie CaO from Seashell and Its Bacterium Inhibition Experiment

将扇贝壳粉碎、过筛,经高温(1100℃)二次灼烧,制作出活性氧化钙。用钙指示剂测定其纯度平均为97%,所制得的活性氧化钙白色度(>92%)高于普通生石灰,而且活性氧化钙遇湿发热温度(40℃)明显小于普通生石灰(60℃)。以NaClO及普通生石灰作对照,用活性氧化钙对黄瓜、单环刺缢做抑菌试验,48h后,0.5%活性氧化钙悬液对鲜黄瓜的抑菌率为94.4%、对新鲜的单环刺缢的抑菌率为97.5%,明显高于0.5%生石灰悬液(91.7%、81.5%)的抑菌效果。结果表明,活性氧化钙比普通氧化钙有更好的稳定性及更为明显的抑菌效果。

The active calcium oxide was made from seashell by crushing, sieving and two times＇ high temperature incinerating（ 1100℃ ） and so on. Using calcium - indicator, the average purity of the active calcium oxide was meansurated with the results reached to 97%, and its white ehroma was 92% which was more than the white - ehroma of eormmon calcium oxide. Furtherraore, its heat temperature in water was only 40℃ which is less than the heat temperature of common calcium oxide（60℃ ）. Comparing by NaC10 and common calcium oxide, the inhibiting bacterium experiments have been done with cucumber and urechis unicinctus. After 48 hours, the bacterium inhibiting rate of 0.5% active calcium oxide could reach 94.4% for cucumber and about 97.5 % for urechis unleinctus while the 0.5 % common calcium oxide inhibiting rate is about 91. 7% for cucumber and 81.5% for urechis unieinctus. The result of the experiment showed the active calcium oxide has evident function in bacterium inhibition.