【摘要】 利用从沼泽土中提取的腐植酸 ,研究了经氧化镧改性后的腐植酸对磷的吸附性能 ,考察了各种条件对吸附的影响。实验证明 :未经改性的腐植酸对磷几乎没有吸附作用 ,而经过氧化镧改性后的腐植酸对磷有较好的吸附效果 ,它对磷的吸附符合Langmuir吸附等温线 ,且受时间、pH值等的影响 ,与温度的关系不大 ,可作为一种有发展前景的脱磷吸附剂。更多还原

【Abstract】 The adsorptive properties of phosphate on lanthanum modified humic acid extracted from swampy soil in Zhongdian Yunnan province were studied, and the adsorption perfermance under different conditions was examined also. The result shows that the humic acid has little adsorbent abitity for phosprours, but the modified humic acid by lanthanum oxide is effective to adsorb phosphorus. The adsorption isotherm is conformed to the Langmuir equation. The adsorptive properties for phosphorus from aqueous solutions are correlative with time and pH, but little with by temperature. It is a potential adsorbent in wastewater treatment. It has very important theoretic and practical significance in develop the resource of swampy soil of Yunnan, and in application in the field of sewage disposal.更多还原