摘要
化学需氧量是我国实施排放总量控制的指标之一,它反映了水中受还原性物质污染的程度,水中还原性物质包括有机物、亚硝酸盐、亚铁盐、硫化物等;化学需氧量的定量方法因氧化剂的浓度、氧化酸度、反应温度、时间及催化剂的有无等条件的不同而出现不同的结果。
Chemical oxygen demand is one of the indicators of the total emission control in China. It reflects the ex- tent to which the water is contaminated by reducing substances. The water reducing substances including organics, nitrite, ferrous salt, sulfide etc. The quantitative method of chemical oxygen demand shows different results accord- ing to the concentration of oxidant, the oxidation acidity, the reaction temperature, the oxidation time and the pres- ence or absence of catalyst.
作者
梁丽霞
侯平
苗伟
王艳红
LIANG Li-xia;HOU Ping;MIAO Wei;WANG Yan-hong(Research Institute of PetroChina Urumqi Petrochemical Co, Urumqi 830019, China)
出处
《聚酯工业》
CAS
2018年第2期25-27,共3页
Polyester Industry
关键词
重铬酸钾法
化学需氧量
准确度
potassium dichromate method
chemical oxygen demand
accuracy
