乳状液膜法治理氧化铁氨氮废水的研究

研究了采用液膜分离技术从氧化铁行业生产氨氮废水中处理氨氮的工艺,并通过实际工业废水进行了验证。主要考察了表面活性剂的用量、外水相pH值、内相试剂的选择、油内比、乳水比等因素对氨氮去除率的影响。通过实验结果表明:以3%EA表面活性剂(质量分数),10%内水相硫酸浓度,油内比为2∶1的乳状液膜体系,处理初始浓度为1057mg/L氧化铁行业氨氮废水,在pH值为11.8,乳水比Rew为1∶8的传质条件下,氨氮去除率可达94%以上。

STUDY ON EXTRACTING OF AMMONIA NITROGEN WASTEWATER IN LIQUID MEMBRANE SYSTEM

The optimum membrane composition and technique on extracting of ammonia nitrogen wastewater were studied.The experimental results show that when kerosene containing 3% EA,surfactant(mass fration) was used as oil phase,10%H2SO4(mass fration) as internal aqueous phase;pH of external aqueous phase was 11.8;Roi=2∶1;Rew=1∶5,the extraction rate of ammonia nitrogen waste water with an initial concentration of 1057 mg/L was up to 97.9%.