针铁矿对低浓度造纸废水COD的吸附试验研究

Study on Treatment Low-consistence Wastewater of Straw Papering by Goethite

主要探讨了针铁矿对草浆造纸厂经过二级生化处理的中段水出水进行处理的研究。当pH=6，针铁矿用量为35g／L废水，常温搅拌吸附60min后，其对COD的吸附效率可以达到68.89％，吸附容量为7.76mg COD／g。在310℃下对吸附后的针铁矿进行解吸，一次解吸后的针铁矿吸附容量为原针铁矿吸附容量的95％以上。

This paper focuses in the treatment for the low-consistence wastewater in mid-section of straw papering by goethite. When 35g goethite was used for 1 liter organic-containing solution with 400mg/L of cod, pH=6.0,t= 60 min the absorption amount was 7.76mg COD/g, the absorption rate was 68.89%, and the desorption rate is more than 95% after once desorption in 310℃.