Seth A, Bachmann R, Boxall J, Saul A, Edyvean R
Department of Chemical and Process Engineering, University of Sheffield, Newcastle Street, Sheffield S1 3JD, UK.
Water Sci Technol. 2004;49(2):27-32.
Discoloured water is one of the main causes of customer complaints received by UK water suppliers. Flushing is recognised as a means of preventing red water events by mobilising material with the potential to cause discolouration. The understanding of the mechanisms and materials causing discolouration is limited. It is therefore necessary to characterise the materials mobilised by flushing, which are responsible for discolouration. The University of Sheffield and two UK water companies embarked on an in-depth programme of monitoring mains flushing. The programme involves collecting discrete samples during flushing of pipes of differing materials, diameters, age, source water and hydraulic regime. The results show iron to be the dominant material mobilised irrespective of pipe material. All samples indicate a direct correlation between turbidity, iron and manganese, and to a lesser extent with metals lead, copper, aluminium and zinc. Concentration of metals mobilised is independent of pipe material, diameter or age.
水变色是英国供水公司收到客户投诉的主要原因之一。冲洗被认为是通过调动可能导致变色的物质来预防红水事件的一种手段。对导致变色的机制和物质的了解有限。因此，有必要对冲洗调动的导致变色的物质进行表征。谢菲尔德大学和两家英国自来水公司开展了一项深入的监测主管道冲洗的计划。该计划包括在冲洗不同材料、直径、使用年限、水源水和水力状况的管道时采集离散样本。结果表明，无论管道材料如何，铁都是被调动的主要物质。所有样本都表明浊度、铁和锰之间存在直接关联，在较小程度上与金属铅、铜、铝和锌也存在关联。被调动的金属浓度与管道材料、直径或使用年限无关。
