Static study on pretreatment of phenol wastewater with spongy iron
Shen Lina~1,Wanyan Hua~1,Tuo Huibin~2,Yang Minxue~1 (1. School of Environmental Science and Municipal Engineering, Lanzhou Jiaotong University,Lanzhou730070,China; 2. Lanzhou Engineering Researching Institute of Nonferrous Metallurgy,Lanzhou730000,China)
The treatment behavior of spongy iron which are prepared with refined mineral and iron is made oxide phosphor is studied on phenol wastewater.The experimental study of affected factors in treatment phenol wastewater with spongy iron is made in order to find the best treatment condition;The suitable pH, particle size, phenol concentration, reaction time, temperature and quantity on phenol wastewater treatment are researched by static test. Experimental results show that when the pH value is 5～6 ,the particle size of spongy iron is 0.5～1.2 mm, temperature is 10～25℃,dose is 50～150 g/L and reaction time is 50 min,the removal rate of phenol wastewater may reach 40% for phenol concentration below 4 mg/L.The reaction mechanism,which is based on the combined actions of electrochemistry, oxidationreduction, physical adsorption and flocculation,is studied by a test.The results show that spongy iron may utilize to wipe off lowdensity phenol wastewater as pretreatment material,but it doesn't fit to remove highdensity phenol wastewater.The sponge iron has the features of less cost,simple operation and better removal efficiency, so it has a wide application prospect as a new type material of wastewater treatment.
【CateGory Index】： X703.1