九龙江北溪饮用水源地铁、锰浓度调查分析

The Investigation and Analysis of Iron and Manganese Contents in Drinking Water Sources of Beixi Stream of Jiulong River

通过对2013年饮用水源地铁．锰监测结果分析，发现：九龙江北溪饮用水源地铁、锰浓度高于全省平均水平，5个水源地铁．锰浓度虽均能达标，但最大达临界值，存在超标风险；溶解氧对铁影响不大．对锰影响较大；九龙江北溪水源地铁、锰主要源自上游地区。矿山开采是其主要的人为污染源，适宜条件下沉积物释放也是来源之一。

The monitoring data of the year 2013 show that the concentrations of iron and manganese in drinking water sources of Beixi Stream of Jiulong River were higher than the province-wide averages though those in five water sources could be in compliance, however, their maximum values reached critical levels with a risk of exceeding standard limits. Dissolved oxygen exerted a little effect on iron but greater impact to manganese contents. It was found that iron and manganese in drinking water sources of Beixi Stream of Jiulong River was mainly originated from the upstream areas where mining activities were the major anthropogenic sources of pollution, and release from sediment under appropriate conditions was another source, as well.