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黄磷污水中之元素磷对生物有极大的毒害,为此,控制排放污水中元素磷含量,避免周围环境的污染十分重要。我们对污水中痕量元素磷的测定方法进行了试验。电炉制磷污水中元素磷含量极低,经处理后的排放污水仅含0.05毫克/升以下。但污水组成极为复杂,干扰元素磷测定的物质又多,水溶性磷含量为元素磷之近千倍,因此要获得正确的分析结果,必需:1.将元素磷和水溶性磷分离。2.分离后的元素磷氧化成正磷酸。3.用灵敏度较高的测定方法进行测定。我们采用苯为溶剂萃取元素磷,使和
Phosphorus in phosphorus wastewater is extremely toxic to organisms. Therefore, it is very important to control the phosphorus content in the effluent and avoid the pollution of the surrounding environment. We tested the method of determination of trace element phosphorus in sewage. Phosphorus in EAF sewage contains very low content of elemental phosphorus, and the treated sewage discharge contains only 0.05 mg / L or less. However, the composition of sewage is extremely complicated, and many substances interfere with the determination of elemental phosphorus. The content of water-soluble phosphorus is nearly a thousand times that of elemental phosphorus. Therefore, to obtain the correct analysis results, it is necessary to: 1. Separate the elemental phosphorus and water-soluble phosphorus. 2. The separated element is oxidized to orthophosphoric acid. 3. Determination of sensitivity with higher measurement methods. We use benzene as solvent to extract elemental phosphorus and make it