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试验采用了3种人工合成的氧化铁为材料,研究了氧化铁对磷的吸附以及柠檬酸对氧化铁磷吸附特性的影响。结果表明:3种人工合成的氧化铁对磷的吸附特性及柠檬酸对氧化铁吸附磷的影响都可用Langumir方程来描述,都达到了极显著水平。从磷的最大吸附量(Sm)、吸附反应常数(K)和最大缓冲容量(MBC)来看,未加入柠檬酸时,水铁矿对磷的吸附在容量和强度方面均为最高;而在加入柠檬酸时,3种人工合成的氧化铁对磷的吸附能力的顺序并无差别,水铁矿和针铁矿的磷Sm和MBC要比赤铁矿大很多。
Three kinds of synthetic iron oxide were used as materials to study the effect of iron oxide on phosphorus adsorption and citric acid on the adsorption characteristics of iron oxide phosphorus. The results showed that the three kinds of synthetic ferric oxide adsorption characteristics of phosphorus and citric acid on iron oxide adsorption of phosphorus can be described by Langumir equation, have reached a significant level. From the maximum adsorption capacity of phosphorus (Sm), adsorption reaction constant (K) and maximum buffer capacity (MBC) point of view, without the addition of citric acid, iron phosphate adsorption of phosphorus in both capacity and strength are the highest; When citric acid was added, there was no difference in the order of adsorption capacity of the three kinds of synthetic iron oxides to phosphorus. The contents of Sm and MBC in water iron ore and goethite were much larger than those in hematite.