赤泥强化型岸边缓冲带模拟系统对再生水中磷净化机理初探

为了探讨赤泥对再生水中磷的净化机理,利用烧结法得到了比表面积大、孔隙众多且均匀,钙、铁金属元素含量高,对磷具有较好的吸附作用的赤泥,并通过室内模拟河岸缓冲带系统研究了不同赤泥施入比例对再生水中磷的净化效果及机理.结果表明,赤泥投加量控制在2.5%～5.0%之间时,不仅对再生水中磷的去除效果最好,而且可促使系统基质中铁铝...

Mechanisms of phosphorus removal from reclaimed water in a simulated wetland buffer zone enhanced with red mud

Sintered red mud, with large specific surface area and many holes, is rich of Ca, Al and Fe oxides, which result in well adsorption capacity of phosphorus. Performance and mechanisms of the phosphorus removal of the reclaimed water was investigated by a lab-scale simulated buffer zone adding with different proportions of red mud. The results indicated that the optimum of phosphorus removal was reached at the adding range of 2.5%-5% of red mud, which the state of Al & Fe -P in substrate was transferred in the more stable state of Ca-P. However, the pH value of substrate rose with the increase of red mud adding,. At the 7.5% of adding red mud, the results of SEM/ESD showed that there were many particle materials found on the surface of the substrate, which may lead to the lower removal of phosphorus and whose composition is needed to be further studied.