海带漂烫水中碘的空气吹出法提取工艺研究

采用空气吹出法研究了海带漂烫水中碘的提取工艺，并通过3因素4水平正交实验对体系的pH、温 度、空气通量等工艺条件做了优化，同时探讨了不同氧化剂（NaNO2-H2O2、NaClO和NaNO2）对碘吹出效果的影响。实验得到空气吹出法提取海带漂烫水中碘的最佳工艺条件：pH=2、温度为70 ℃、空气进量为2 L/min，此时碘的最终吹出率可达96.2%。在最佳工艺条件下，分别采用NaNO2-H2O2、NaClO和NaNO2作为氧化剂时，碘的吹出率均可达到90%，表明氧化剂种类对该工艺条件无显著影响。

Research of iodine extraction process by air blow-out method from kelp blanching waste water

The air blow-out method was utilized to exact iodine from kelp blanching waste water and the experimental condi- tions，such as pH，temperature，and air flow，were optimized with 3 factors and 4 levels orthogonal tests to improve the iodine exaction rate.In addition，the effects of different oxidizers（NaNO2-H2O2，NaClO，and NaNO2） under the optimized conditions were investigated.Results showed that the optimum reaction conditions were pH of 2.0，temperature of 70 ℃，and air blow-in of 2 L/min.Under the optimized conditions，the exaction rate was up to 96.2%.There is no significant difference on the oxidizing effect among three oxidizers，and the exaction rate all could be up to 90%.Therefore，oxidizing agent′s kind had no obvious effect on the reaction.