神农架大九湖泥炭藓沼泽湿地对镉(Ⅱ)、铜(Ⅱ)、铅(Ⅱ)、锌(Ⅱ)的净化模拟  

ON THE PURIFICATION EFFECTS OF THE SPHAGNUM WETLAND ON Cd(Ⅱ),Cu(Ⅱ),Pb(Ⅱ),Zn(Ⅱ) IN DAJIUHU BASIN OF SHENNONGJIA MOUNTAINS

作　　者：胡鸿兴[1] 张岩岩[1] 何伟[1] 田蓉[1] 钟鑫[1] 韩世松[1] 李思思[1] 王俊杰[1] 陈文方[1] 杨阳[1] 陈侈[1] 邓晗[1] 文英[1] 崔雅婷[1] 李茜[1] 王璇[1] 彭菁菁[1] 高鑫[1] 唐义[1] 

机构地区：[1]武汉大学神农架及长江流域生态考察队,湖北武汉430072

出　　处：《长江流域资源与环境》2009年第11期1050-1057,共8页Resources and Environment in the Yangtze Basin

基　　金：全球环境基金/联合国环境署资助项目(2004-2008)

摘　　要：在2007年8月研究的基础上,于2008年7月在神农架大九湖泥炭藓沼泽湿地采用自制简易模拟装置进行现场模拟实验,深入研究了泥炭藓沼泽湿地对不同浓度的金属污染物镉(Ⅱ)、铜(Ⅱ)、铅(Ⅱ)、锌(Ⅱ)的净化作用。研究表明:泥炭藓沼泽湿地对各种金属污染物都有很强的去除能力,2小时后的去除效果强弱顺序为Pb>Cu>Cd>Zn;4种金属任一时刻的去除速率都随初始浓度的增加而增大,低初始浓度先于高初始浓度达到平衡;泥炭藓沼泽湿地的稀释功能在污染物去除中起着重要作用。通过双常数速率模型得到了去除速率与实验时间的关系;拟二级动力学模型和修改后的拟一级动力学模型能够很好地描述泥炭藓沼泽湿地去除金属污染物的动态过程,拟二级动力学模型的拟合效果更佳,通过修改后的拟一级动力学模型可以计算出稀释作用对湿地净化的贡献率。为评估泥炭藓沼泽湿地净水价值、保护和合理利用泥炭藓沼泽湿地提供科学依据。In the July of the year 2008,the purification effects of the sphagnum wetland in Dajiuhu basin of Shennongjia mountains on metal ions Cd（ Ⅱ ） ,Cu（ Ⅱ ） ,Pb（ Ⅱ ）,Zn（ Ⅱ ） were studied using simulated wetland on the basis of the research in August, 2007. The results indicate that the removal capacity of the sphagnum wetland was obvious for all the contaminant. In two hours, the removal effect decreased in the order-Pb〉Cu〉Cd〉Zn. The removal rate at any time point increased with the augment of the initial concentration for all the metals. It takes longer time to reach equilibrium for the polluted solution with higher initial concentration. The dilution effect of the sphagnum wetland played an important role in the purification process. The relationship between removal rate and experiment time can be obtained by the two-constant rate model. Both of the modified pseudo-first kinetic model and the pseudo-second kinetic model fitted the experimental data well, but the latter has a better fitness. The contribution ratio of dilution to the removal effect can be calculated using the modified pseudo-first kinetic model. The article provided scientific basis for evaluating the purification value of the sphagnum wetland, and for protecting and using it reasonably in the future.

关 键 词：神农架大九湖 泥炭藓沼泽湿地 模拟实验 净化 动力学模型 

分 类 号：X173[环境科学与工程—环境科学] P532[天文地球—古生物学与地层学]