供水管网铁释放的影响因素相对重要性分析
发布时间：2018-08-27 20:13
【摘要】：供水管网的铁释放问题近年来日益受到关注.影响供水管网铁释放的因素众多,本研究选取了pH、溶解氧(DO)、碱度(Alk)、硬度、氯离子(Cl~-)、硫酸根(SO_4~(2-))、温度(T)和水力停留时间(HRT)这8个影响因素,利用逐步回归和偏相关分析,建立了铁释放的非线性幂指数模型,并用标准化回归系数和偏相关系数比较了这些因素的相对重要性.结果表明,铁释放模型拟合效果良好;用标准化回归系数衡量影响因素相对重要性时,SO_4~(2-)、HRT、Cl~-和T是相对重要的因素,相对重要性排序为SO_4~(2-)≈HRTCl~-T;用偏相关系数衡量时,HRT、SO_4~(2-)、Alk、Cl~-和T是相对重要的因素,排序为HRTSO_4~(2-)AlkCl~-T.综合两种系数的分析结果,HRT、SO_4~(2-)和Cl~-是本研究条件下相对重要的因素,T和Alk的相对重要性视实际情况变动.
[Abstract]:Iron release from water supply networks has attracted more and more attention in recent years. There are many factors influencing iron release in water supply network. In this study, eight factors, (Alk), hardness of pH, dissolved oxygen (DO), chloride ion (Cl~-), SO_4~ (2-), temperature (T) and HRT (HRT), were selected and analyzed by stepwise regression and partial correlation analysis. The nonlinear exponential model of iron release is established, and the relative importance of these factors is compared with the normalized regression coefficient and partial correlation coefficient. The results show that the iron release model fits well and that the relative importance of the influencing factors is measured by the standardized regression coefficient, so _ 4- ~ (2-) HRTCl ~ (-) and T are relatively important factors. The order of relative importance is SO_4~ (2-) 鈮，
本文编号：2208330
[Abstract]:Iron release from water supply networks has attracted more and more attention in recent years. There are many factors influencing iron release in water supply network. In this study, eight factors, (Alk), hardness of pH, dissolved oxygen (DO), chloride ion (Cl~-), SO_4~ (2-), temperature (T) and HRT (HRT), were selected and analyzed by stepwise regression and partial correlation analysis. The nonlinear exponential model of iron release is established, and the relative importance of these factors is compared with the normalized regression coefficient and partial correlation coefficient. The results show that the iron release model fits well and that the relative importance of the influencing factors is measured by the standardized regression coefficient, so _ 4- ~ (2-) HRTCl ~ (-) and T are relatively important factors. The order of relative importance is SO_4~ (2-) 鈮，
本文编号：2208330
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