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当前位置: 首页 > 文章 > 湿地填料的磷吸附特性及潜流人工湿地除磷效果研究 农业环境科学学报 2005,24 (02) 353-356
Position: Home > Articles > Characterization of Adsorption on Phosphorus in Stuffings and Its Removal in Substratum in Wetland Journal of Agro-Environment Science 2005,24 (02) 353-356

湿地填料的磷吸附特性及潜流人工湿地除磷效果研究

作  者：
谭洪新;周琪
单  位：
同济大学环境科学与工程学院
关键词：
钢渣;页岩;湿地;磷吸附
摘  要：
采用现场采样及室内试验方法,研究了钢渣、页岩、砾石和棕色土壤等湿地填料对磷的等温吸附特性及由页岩和钢渣构建的潜流湿地对磷的去除效果。结果表明,用Langm uir方程能很好地描述钢渣、页岩、棕色土壤和砾石对磷的等温吸附过程。钢渣、页岩、棕色土壤和砾石的磷最大吸附量分别为2500.00、666.67、2.55和0.54m g·kg-1,按吸附量大小依次为钢渣>页岩>棕色土壤>砾石。钢渣在0～20、0～50、0～100、0～150、0～300m g·L-1起始磷浓度系列内的吸附常数(a)和最大吸附量(b)差异较大,钢渣的最大磷吸附量提高了6.5倍(从384.62m g·kg-1到2500m g·kg-1),同时吸附常数减小了32.5倍(从2.6到0.08)。当潜流湿地水力停留时间(H RT)为0.95d运行时,湿地平均进水总磷浓度为2.774m g·kg-1,平均出水总磷浓度为0.211m g·kg-1,平均磷去除率为91.52%。
译  名：
Characterization of Adsorption on Phosphorus in Stuffings and Its Removal in Substratum in Wetland
作  者：
TAN Hong-xin 1,2 ,ZHOU Qi 1 (1.School of Environmental Science and Engineering,Tongji University,Shanghai200092,China;2.Institute of Aquacultural Engineering,Shanghai Fisheries University,Shanghai200090,China)
关键词：
steel slag;shale;wetland;phosphorus adsorption
摘  要：
Steel slag,shale,brown soil and gravel were utilized to study adsorption of phosphorus in stuffing in a constructed wetland.The experiment results showed that:P adsorption in the wetland substratum with the materials mentioned above could be simulated well by Langmuir equation.The maximum P adsorption capacity for steel slag,shale,brown soil and gravel were found to be:2500.00mg·kg -1 ,666.67mg·kg -1 ,2.55mg·kg -1,0.54mg·kg-1 respectively.According to the size of the maximum P adsorption capacity of these substratum,there was an order in rank:steel slag>shale>brown soil>gravel.Maximum adsorption amount b and adsorption constant a of P adsorption were determined at initial P concentrations with0～20mg·L -1 ,0～50mg·L-1,0～100mg·L-1 ,0～150mg·L -1,0～300mg·L-1 and revealed that there was a large difference between them.Depending on the range of concentrations applied,the maximum P adsorption capacity of steel slag increased by6.5times,from384.62mg·kg-1 to 2500.00mg·kg -1 ,while the bonding capacity decreased by32.5times,from2.6to0.08mg·kg-1 in magnitude,respectively.TP concentrations of both influent and effluent of the wetland were2.774mg·L -1 and0.211mg·L-1 ,respectively,at HRT=0.95d,indicating that TP removal efficiency was91.52%.

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