改性膨胀珍珠岩去除废水中磷酸盐的研究

Research onRemoval of Phosphorus from Wastewater by ModifiedExpanded Perlite

采用膨胀珍珠岩经过镧系稀土金属元素改性后处理了舍磷废水。结果表明：改性后的膨胀珍珠岩对废水中的磷酸盐有明显的去除效果，当废水pH值为6～9，磷浓度为〈25mg／L，按改性膨胀珍珠岩与磷质量比为50：1来处理含磷废水，反应时间在4h之内，剩余磷酸盐的浓度小于0．5mg／L，磷酸盐的去除率达97％以上。

The treatment of phosphorous--containing wastewater with lanthanide thulium modified expanded perlitewas experimentally investigated. The results show that the rate of phosphorous removal is more than 97%,when pH is 6-9 and phosphorous concentration is in the range of 0-25mg/L,and reaction time is more than 4 hour. The treated effluent meets the national wastewater discharge standard.