摘要
讨论了敌敌畏光催化降解后显色时间与其浓度的关系。用磷钼蓝法测定了敌敌畏浓度相同而钼酸铵浓度不同对显色时间及吸光度的影响 .还测定了当钼酸铵过量时 ,其吸光度的变化趋势。结果表明 ,一定浓度的敌敌畏溶液 ,只有达到一定时间所测定的光催化效率是准确的。例如1.0 μg/mL的敌敌畏溶液 ,照射 6h或更长时间 ,其显色稳定时间均为 9min.低于 6h照射 。
In order to find the appropriate measuring condition, we analysis the relation between (CH 3O) 2POOCHCCl 2 concentration and color displaying time, after photocatalytic decomposition. Using molybdenum blue irradiating method, we measure the influences for steady color displaying time and absorbency with the same (CH 3O) 2POOCHCCl 2 concentration but different (NH 4) 2MoO 4 concentration. The changing tendency of the absorbency is also determined with excessive (NH 4) 2MoO 4 added. Experimental results demonstrate that the efficiency of photocatalytic decomposition is accurate for certain concentration of DDTP solution, after a specific time period of irradiating only. For example, for 1.0?μg/mL DDTP solution, the steady color displaying time is 9 minutes, after 6 hours or more time of irradiation. The steady color displaying time will be shorter, less than 6 hours'exposure.
出处
《大连轻工业学院学报》
2002年第2期86-88,共3页
Journal of Dalian Institute of Light Industry
