【摘要】 在镧离子质量浓度0.5%,pH为10下浸渍16 h以上,于110℃干燥陈化24 h后,再于450~500℃焙烧1 h,冷却后过筛取筛下粒径120目以上为最佳稀土吸附剂,用于静态同步脱氮除磷试验。结果表明,对正磷和氨氮的进水最佳pH为4,此时最大静态吸附分别达到25 mg/g和50 mg/g;当进水pH为4~8,氨氮浓度为10 mg/L,正磷浓度5 mg/L时,出水pH在6~9之间,对二者的去除效率分别达到80%和99%,吸附剂再生7次后对氮磷的去除率仍然保持在80%以上,动力学符合Freundlich吸附模型,相关系数在0.99以上。为处理微污染的氮磷提供了一条新的途径。更多还原

【Abstract】 Adsorbent was firstly immersed in solution of La³⁺ with concentration of 0.5% and pH of 10 for more than 16 h; secondly it was dried up and stabilized at temperature of 110 ℃ for 24 h; then it was roasted at temperature between 400～（500 ℃） for 1 h; finally that with radius more than 120 mesh was chosen to remove ammonia nitrogen and phosphate synchronously in static experiment. According to this experiment, optimal pH was 4 and the largest static adsorbing capacities for NH⁺₄-N and H₂PO^-₄ were 25 mg/g and （50 mg/g） respectively. In influence of NH⁺₄-N and H₂PO^-₄ with concentrations of 10 mg/L and （5 mg/L） respectively, following results can be identified: removal efficiencies can reach 80% and 90% respectively; Removal efficiencies were still more than 80% after being regenerated for 7 times; Dynamics for this process was in accordance with Freundlich adsorption model with a correlation efficient of more than 0.99. This experiment provided a new way for treatment of NH⁺₄-N and H₂PO^-₄ in slightly polluted water.更多还原