CAJ | 학술논문

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.
재2007년8월연구적기출상,우2008년7월재신농가대구호니탄선소택습지채용자제간역모의장치진행현장모의실험,심입연구료니탄선소택습지대불동농도적금속오염물력(Ⅱ)、동(Ⅱ)、연(Ⅱ)、자(Ⅱ)적정화작용.연구표명:니탄선소택습지대각충금속오염물도유흔강적거제능력,2소시후적거제효과강약순서위Pb>Cu>Cd>Zn;4충금속임일시각적거제속솔도수초시농도적증가이증대,저초시농도선우고초시농도체도평형;니탄선소택습지적희석공능재오염물거제중기착중요작용.통과쌍상수속솔모형득도료거제속솔여실험시간적관계;의이급동역학모형화수개후적의일급동역학모형능구흔호지묘술니탄선소택습지거제금속오염물적동태과정,의이급동역학모형적의합효과경가,통과수개후적의일급동역학모형가이계산출희석작용대습지정화적공헌솔.위평고니탄선소택습지정수개치、보호화합리이용니탄선소택습지제공과학의거.
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.