论文部分内容阅读
漂白粉是Ca(OCl)_2、CaCl_2及Ca(OH)_2的混合物,其中有效成份为Ca(OCl)_2。当漂白粉与水接触后,其中Ca(OCl)_2即和水生成不稳定的HClO,后者分解成为具有杀菌作用的自由氯和氧,其反应式如下: Ca(OCl)_2+2H_2O=Ca(OH)_2+2HClO 2HClO→H_2O+Cl_2+O_2。所谓有效氯也就是指漂白粉中这种能产生杀菌作用的有效成份而言。因此,漂白粉含有效氯量多的就好,少的就不好,若低于15—20%就不宜用来消毒饮水。一般刚出厂的新鲜漂白粉其有效氯含量为28—35%,倘保存不妥,极易受阳光、湿气、高温及大气中二氧化碳的影晌而损失
Bleaching powder is a mixture of Ca (OCl) _2, CaCl_2 and Ca (OH) _2, the active ingredient is Ca (OCl) _2. When the bleaching powder is in contact with water, Ca (OCl) 2 is unstable with water and forms HClO, which decomposes into free chlorine and oxygen with bactericidal effect. The reaction formula is as follows: Ca (OCl) 2 + 2H2O = Ca OH) _2 + 2HClO 2HClO → H_2O + Cl_2 + O_2. The so-called effective chlorine refers to bleach in this bactericidal effect of active ingredients. Therefore, the bleaching powder contains more effective chlorine like, less is not good, if less than 15-20% should not be used to disinfect drinking water. The general factory fresh bleach its effective chlorine content of 28-35%, if not properly stored, highly vulnerable to sunlight, moisture, heat and the loss of carbon dioxide in the atmosphere loss