赤泥去除工业废水中铵态氮的研究

通过静态振荡试验研究了赤泥对废水中氨氮的去除效果,并与活性炭的脱氮性能进行比较。试验结果表明:赤泥对氨氮的去除量随着水中NH_4~+-N浓度的升高而增加。在固液比为1:10,作用时间为6 h时,赤泥对氨氮的饱和去除量为1.345mg/g,此时废水中的氨氮浓度为700mg/L。对于实际氨氮工业废水,根据其去除量变化曲线拟合的关系方程式得出赤泥反应24 h时,对废水中NH_4~+-N去除量最大。对于配制的氨氮废水和实际氨氮工业废水,赤泥的去除效果均强于活性炭。

Removal Effect of Red Mud on Ammonia Nitrogen in Industrial Wastewater

Static oscillation tests were carried out to investigate the ammonia nitrogen in wastewater removal performance of red mud, and compared with activated carbon. The results of experiments showed that removal amount of red mud was raising with the increasing of the concentration of NH4^＋ - N. When the ratio of solid - liquid was 1 ： 10 and the time of action was 6 h, the maximum removal amount of red mud was 1. 345mg/g with 700mg/L ammonia nitrogen. According to equation which was from removal amount curve, removal amount of red mud was the highest in the 24 h for the ammonia - nitrogen from industrial wastewater. The removal effect of red mud was larger than that of activated carbon for the preparation of ammonia - nitrogen wastewater and the industrial wastewater.