Liu Shu-Yuan, Zheng Chen, Yuan Qi, Wang Xian-Bing, Wang Zi-Yan
Huan Jing Ke Xue. 2014 Oct;35(10):3702-8.
Changtan Reservoir in Taizhou City Zhejiang Province and its inflow rivers were surveyed in January and from April to December in 2013. Based on those data and the water quality monitoring data in Changtan Reservoir collected in previous years, the change characteristics of iron and manganese concentrations in source water reservoir were investigated. Furthermore, the causes of water pollution by iron and manganese were discussed based on the variation of water temperature, dissolved oxygen (DO) in reservoir with water depth. The results showed that the seasonal variation characteristics of iron and the manganese concentrations in reservoir were much in evidence. Their concentrations were high from June to August and the highest values over the years at the outlet of Changtan Reservoir were 2.38 mg · L(-1) and 1.24 mg · L(-1), respectively. The iron and the manganese concentrations exceeded the Surface Water Environment Quality Standard (GB 383822002) of 0.3 mg · L(-1) and 0.1 mg · L(-1) from May to October. And in 2013, their highest values in the reservoir outlet exceeded the standard by 5. 6 times and 12. 4 times, respectively. The maxima of iron and manganese concentrations in the major rivers were 0.89 mg · L(-1) and 0.56 mg · L(-1), which were lower than those in the reservoir outlet. The comprehensive analysis result indicated that the exogenous pollution was not the major source of iron and manganese in the reservoir. The iron and manganese concentration at the bottom of the reservoir reached the maximum in July, 2.42 mg · L(-1) and 1.20 mg · L(-1), respectively. The typical vertical distribution of temperature, DO and iron and manganese concentrations in the reservoir in summer showed that seasonal anoxic environment caused by the thermal stratification led to the release of iron manganese from the deposits. The endogenous pollution caused by thermal stratification effect was the direct cause for the high iron and manganese concentrations in water. To control iron and manganese pollution in drinking water resource reservoir, efficient and direct in situ water quality improvement and repair technology should be developed.
2013年1月以及4月至12月，对浙江省台州市长潭水库及其入库河流进行了调查。基于这些数据以及往年收集的长潭水库水质监测数据，研究了水源地水库中铁、锰浓度的变化特征。此外，根据水温、水库中溶解氧（DO）随水深的变化情况，探讨了铁、锰水污染的成因。结果表明，水库中铁、锰浓度的季节变化特征十分明显。6月至8月其浓度较高，长潭水库出库口多年来的最高值分别为2.38mg·L⁻¹和1.24mg·L⁻¹。5月至10月，铁、锰浓度超过了《地表水环境质量标准》（GB 3838—2002）规定的0.3mg·L⁻¹和0.1mg·L⁻¹。2013年，水库出库口铁、锰的最高值分别超标5.6倍和12.4倍。主要河流中铁、锰浓度的最大值分别为0.89mg·L⁻¹和0.56mg·L⁻¹，低于水库出库口的浓度。综合分析结果表明，外源污染不是水库中铁、锰的主要来源。7月水库底部铁、锰浓度达到最大值，分别为2.42mg·L⁻¹和1.20mg·L⁻¹。夏季水库中温度、溶解氧以及铁、锰浓度典型的垂直分布表明，热分层导致的季节性缺氧环境致使铁、锰从沉积物中释放出来。热分层效应引起的内源污染是水体中铁、锰浓度高的直接原因。为控制饮用水源地水库的铁、锰污染，应研发高效、直接的原位水质改善与修复技术。
