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中文摘要：
文章采用Langmuir等温吸附方程研究了人工湿地基质对磷的吸附能力和基质在人工湿地中的使用寿命，结果显示不同基质对磷的吸附能力差异比较大，其中赤泥对磷的吸附能力最大，铝矿土次之，陶粒和砂子比较低，而以陶粒对磷的吸附能力最低。不同的基质在人工湿地中的使用寿命不同，赤泥可以使用大约3010个月，而陶粒则〈6个月。人工湿地基质大致可分为工业副产品、土壤和沙石三类，其中以工业副产品对磷的吸附能力比较高，土壤其次，而沙石则相对较低。Langmuir等温吸附方程可比较不同基质的吸附能力大小并估算其使用寿命，因此，可将它作为一种快速筛选人工湿地基质的方法。
英文摘要：
P sorption capacity and lifetime of substrates in constructed wetland system were studied by Langmuir isotherm equation. Results showed that P sorption capacity of different substrates widely varied. Red mud had great P-sorption capacity, followed was aluminate, and that of sand and granular ceramsite was relatively low, especially granular ceramsite was the lowest. Lifetime of various substrates for P sorption estimated by Langmuir P sor＇ption was different, with lifetime of red mud up to 3010 months in full scale system, while that of granular ceramsite only 6 months. Substrates used in constructed wetland were classified into three types, in which industrial byproduct had strong capacity to absorb phosphorus, followed by soil,that of sand had relatively low absorption capacity. Langmuir isotherm equation could be used to compare capacity to absorb phosphorus and estimate lifetime of substrates in constructed wetland, which could be used to quickly screen substrates for use in constructed wetlands.
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