【摘要】：供水管網(wǎng)的鐵釋放問題近年來日益受到關(guān)注.影響供水管網(wǎng)鐵釋放的因素眾多,本研究選取了pH、溶解氧(DO)、堿度(Alk)、硬度、氯離子(Cl~-)、硫酸根(SO_4~(2-))、溫度(T)和水力停留時(shí)間(HRT)這8個(gè)影響因素,利用逐步回歸和偏相關(guān)分析,建立了鐵釋放的非線性冪指數(shù)模型,并用標(biāo)準(zhǔn)化回歸系數(shù)和偏相關(guān)系數(shù)比較了這些因素的相對重要性.結(jié)果表明,鐵釋放模型擬合效果良好;用標(biāo)準(zhǔn)化回歸系數(shù)衡量影響因素相對重要性時(shí),SO_4~(2-)、HRT、Cl~-和T是相對重要的因素,相對重要性排序?yàn)镾O_4~(2-)≈HRTCl~-T;用偏相關(guān)系數(shù)衡量時(shí),HRT、SO_4~(2-)、Alk、Cl~-和T是相對重要的因素,排序?yàn)镠RTSO_4~(2-)AlkCl~-T.綜合兩種系數(shù)的分析結(jié)果,HRT、SO_4~(2-)和Cl~-是本研究條件下相對重要的因素,T和Alk的相對重要性視實(shí)際情況變動(dòng).
[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，

本文編號：2208330