【作者】 刘秉钺； 李淋； 邢效功；

【Author】 Li Lin Liu Bingyue Xing xiaogong (Dept of Chem. Dalian Inst of Light Ind., Dalian, 116034)

【机构】 大连轻工业学院；

【摘要】 本实验利用氧化反应将稻草亚铵蒸煮废液进行改性以制缓释放氮肥。讨论了氧气压力、反应温度、反应时间、以及黑液固形物浓度对改性产物含氮量、pH、羧基和碳氮比(C／o-N)的影响。结果表明,在实验的范围内增大氧气压力、提高反应温度、延长反应时间有利于氧化反应的进行,废液的固形物浓度则不宜过高。经过改性后的产物中有机态氮含量占总氮含量的34．82％,羧基9．18mmol／g,pH5．2, C／o-N降低至5．03,可用作缓释放氮肥施于农田。更多还原

【Abstract】 In this experiment, the black liquor of ammonium sulfite of rice straw was oxidation by using oxygen. The effects of oxygen pressure, reaction time and temperature and concentration of black liquor on the contents of nitrogen 、carboxyl group and value of pH and C/o-N were discussed. It could be inferred from the results that the properly improved oxygen pressure and reaction temperature and prolonged reaction time could contribute to the oxidation. But the concentration of black liquor should not be too high. After oxidation under the optimum condition, of the modified product, 34.82% of total nitrogen was organic nitrogen. The content of carboxyl group was 9.18mmol/g and the value of pH is 5.2. C/o-N had decreased to 5.03,which absolutely conformed to the standard of slow-released nitrogen fertilizer.更多还原