改性松木锯末吸附富营养化水体中磷的研究

采用改性松木锯末作为吸附剂,对富营养化水体的模拟水样中的磷进行吸附去除研究。实验结果表明,改性松木锯末对磷的吸附作用主要发生在15 min内,吸附时间超过15 min吸附量趋于平衡状态;p H值由4.0上升到6.0,改性松木锯末对磷的去除率增长较快,由6.0上升到9.0,去除率基本处于稳定状态;磷浓度在0.5~5 mg/L的低浓度范围内,改性松木锯末对磷的去除率均可达到95%以上;改性松木锯末的最佳投加量为0.4 g/L。用Freundlich吸附等温线方程能准确地描述改性松木锯末对磷吸附的特征,吸附等温线方程为q=5.11 C~(1/0.523)。

The Adsorption Research of Phosphorus in Eutrophication Water by Using the Modified Pine Sawdust

The modified pine sawdust is used as adsorbent ,the adsorption removal of phosphorus in the simulated eutrophi-cation water is researched .Experiments show that the adsorption of the modified pine sawdust on phosphorus mainly occurs within 15mins and the adsorption capacity tends to equilibrium state over 15mins .The phosphorus removal rate of the modi-fied pine sawdust increases rapidly with the increase of pH from 4 .0 to 6 .0 ,but the removal rate is basically in a stable state with the increase of pH from 6 .0 to 9 .0 .The removal rate all can reach above 95% when the phosphorus concentration is in low concentration range of 0 .5~5 mg/L .The best dosage of the modified pine sawdust is 0 .4 g/L .The characteristics of modified pine sawdust on phosphorus adsorption can be accurately described by Freundlich adsorption isotherm equation and the adsorption isotherm equation is q=5 .11 C1/0 .523 .