【摘要】 研究了哈尔滨何家沟淤泥中Cu、Pb、Zn、Cd释放的动力学过程及其影响因素,并用二级反应动力学等方程对其进行描述。结果表明,二级反应动力学方程拟合效果最好(r>0.9,n=17,p=0.001),释放速率为Cd>Zn>Cu>Pb,最大释放量为Zn>Cu>Cd>Pb,释放程度为Cu>Zn>Cd>Pb。影响因素实验结果显示,pH值对重金属的释放影响最大,而温度、盐度、泥水比的影响相对较小,且随着温度、盐度、泥水比的升高,淤泥中重金属的释放量呈增加趋势。更多还原

【Abstract】 The releasing kinetics of heavy metals and factors affecting the releasing of heavy metals were studed. The timedependent data of heavy metal releasing from sludge could be fitted best by the secondorder equation among six equations selected, and the correlation coefficient for the linear form of the secondorder equation is significant at the confidence level of p=0.001. The releasing rates and the maximum release of heavy metals from the sludge follow the order: Cd>Zn>Cu>Pb and Zn>Cu>Cd>Pb, respectively. Factors affecting the release of heavy metals indicate that there is an increase in releasing content with the increasing temperature, salinity, ratio of soils and water used, and releasing content will increase under the value of pH=2.更多还原