反应条件对钢渣除磷的影响

Effects of Reaction Conditions on Phosphorus Removal by Steel Slag

为了更好地利用钢渣具有较大的比表面积、孔隙率和密度,易于固液分离且不易形成二次污染等特点来处理废水,确定反应条件对钢渣除磷效果的影响,对污水中磷的初始浓度、钢渣用量、钢渣粒径、温度、p H值等因素进行了研究.研究结果表明,磷的初始浓度越大,反应平衡得越快,对除磷总量影响比较显著;随着钢渣用量增加、钢渣粒径减小,磷去除量显著增大;钢渣对磷的去除适宜在偏酸性条件下进行,p H=4时去除率最高;20~35℃条件下温度对钢渣处理效果的影响较小.

Steel slag has already been used to deal with all kinds of wastewater due to its larger specific surface area,porosity and density,its easy solid-liquid separation and not easy to form secondary pollution. In order to ensure the influence of reaction conditions on the steel slag phosphorus removal effect,many factors such as phosphorus in sewage initial concentration,dosage of steel slag,steel slag particle size,temperature,p H value were investigated. The results showed that reaction equilibrium is faster when the initial concentration of phosphorus is higher,and the effects on total phosphorus removal is greater. With the increase of dosage of steel slag,the decrease of steel slag particle size,the quantity of phosphorus removal has a significant increase. Steel slag for phosphorus removal is appropriate in the acidic conditions,the rate of removal is highest when p H = 4. Steel slag has a little effect on treatment effect under the condition of temperature of 20 ~ 35 ℃.