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以新型赤泥基多孔陶瓷滤球(porous ceramic filter material,PCFM)颗粒为吸附剂,采用动态和静态吸附实验相结合的实验方法研究了PCFM颗粒对沉积物磷的吸附性能。动态吸附实验结果表明,影响PCFM颗粒除磷效果的主要因素有投加量、反应时间、上覆水体pH值和环境温度,最佳吸附反应条件为PCFM投加量8 g,反应时间12 h,上覆水体pH=12,环境温度为50℃。静态吸附实验结果表明,随着反应时间的延长,PCFM对沉积物五种形态磷吸附在12 d左右接近或达到了吸附平衡,此时TP、OP、IP、Fe/Al-P和Ca-P的去除量分别为245.89、69.86、155.25、195.22和-49.01 mg·kg-1。可见PCFM对沉积物磷的吸附性能较好,可进一步应用于富营养化湖泊沉积物磷控制。
A new type of porous ceramic filter material (PCFM) particles was used as adsorbent to study the adsorption behavior of PCFM particles on sediment phosphorus by a combination of dynamic and static adsorption experiments. The results of dynamic adsorption experiments showed that the main factors influencing the phosphorus removal efficiency of PCFM particles were dosage, reaction time, pH of overlying water and ambient temperature. The optimum adsorption conditions were PCFM dosage 8 g, reaction time 12 h, Overlying water pH = 12, the ambient temperature is 50 ℃. The results of static adsorption experiment showed that with the extension of the reaction time, PCFM approached or reached equilibrium adsorption on the five forms of phosphorus in sediments at about 12 days. At this time, TP, OP, IP, Fe / Al-P and Ca-P The removal rates were 245.89, 69.86, 155.25, 195.22 and -49.01 mg · kg -1, respectively. It can be seen that PCFM has better adsorption properties on sediment phosphorus and can be further applied to phosphorus control of eutrophic lake sediments.