温州市黑臭河道河岸土对磷的吸附特征  

Phosphorus Adsorption Characteristics of the Black-and-Stink Riverbank Soils in Wenzhou City

作　　者：韩景超[1] 毕春娟[1] 陈振楼[1] 王骏[1] 

机构地区：[1]华东师范大学 地理信息科学教育部重点实验室

出　　处：《上海环境科学》2013年第1期1-6,共6页Shanghai Environmental Sciences

基　　金：国家科技重大水专项(编号:2009ZX07317-006);国家自然科学基金项目(编号:40971259);上海市优秀学科带头人计划(编号:10XD1401600)

摘　　要：为科学的对城市黑臭河道河岸带进行改造，选取温州市典型黑臭河道河岸土作为试验土壤，研究了河岸带土壤对磷的吸附能力，并分别采用Langmuir、Freundlich等温吸附模型进行拟合，计算出土壤样品的Xm、K值和七、6值等，分析了pH，粘粒，有机质、有效磷等对磷吸附作用的影响，探讨了河岸带土壤对地表径流磷的截留阻控能力，提出了若干改造城市河岸带的建议。结果表明，供试土壤的磷吸附状况能很好地拟合Langmuir模型和Freundlich模型，运用模型推算出了供试土壤对磷的最大吸附量在226．8～390．6mg／kg；pH值与最大缓冲容量（MBC）．吸附强度因子Ⅳ呈显著性负相关（P〈0．05），因此提高pH值，并不能增加土壤对磷的贮存能力；物理粘粒含量跟最大缓冲容量（MBC）、吸附强度因子彤呈显著性正相关（P〈0．05），而最大吸附量托与土壤样品的物理性质相关性并不好，具体原因还需进一步研究。The typical black-and-stink riverbank soils in Wenzhou City were selected to study the phosphorus adsorption capacity and to explore the adsorption mechanism as well as its influencing factors in order to provide a scientific basis for the management of black-and-stink rivers and the reconstruction of city riverbank. The results showed that phosphorus adsorption of the tested soils could be well fitted with the simple Langmuir and Freundlich models. The maximum phosphorus adsorption capacity of the soils calculated by the Langmuir model ranged from 226.8 mg/kg to 390.6 mg/kg. The pH values were negatively correlated with the maximum buffer capacity （MBC） and adsorption intensity factor （K） whilst the Pearson value was below 0.05. Hence, increasing the pH values could not enhance the phosphorus storage capacity of the soils. Physical clay content was positively correlated with both of MBC and K whilst the Pearson value was also below 0.05. In contrast, the maximum phosphorus adsorption Xm did not show well correlations with physical natures of the soils, so that further research would be needed to find out its specific reasons.

关 键 词：黑臭河道 河岸土 磷吸附 最大吸附量 影响因素 

分 类 号：X522[环境科学与工程—环境工程]