摘要
游鱼河为贵州省阿哈湖水库典型煤矿酸性废水汇人支流,通过对游鱼河6月和8月分别连续24 h的现场物理化学参数测试和样品实测分析,从水库水质安全方面探讨游鱼河铁、锰的变化特征及对水库水体铁、锰的贡献率。结果显示,游鱼河流域煤矿酸性废水通过投加石灰处理,pH值提高,符合排放要求,HCO_3^-碱度也有所增加,使水体具备一定缓冲性能。而SO_4^(2-)质量浓度高于国家地表水环境质量标准,除6月铁符合标准,锰的超标率达到91.7%,8月铁、锰超标率分别为87.5%和100%。游鱼河入库水体中铁、锰按平均质量浓度分别为0.65 mg/L和0.98 mg/L,每年进入阿哈湖水库中溶解态铁、锰分别为23.57 t和35.54 t,铁、锰来源与外来补水中铁、锰浓度及河流底泥中铁、锰释放有很大关系。
The given article is inclined to introduce our investigation of the contributory rate of iron and manganese ingredients in typical tributaries of the Aha Reservoir, Guizhou, which is badly polluted with acid coal-mine drainage. The present faet is that the Fe and Mn concentrations in the water of Aha Reservoir were found severely ex- ceeding the State-stipulated Surface Water Quality Standard （GB 3838--2002）, that is, 0.3 mg/L for Fe and 0.1 mg/L ~or Mn in 1985 and 1990. As a matter of faet, sinee 1995, two sewage-treating plants have been built overthere to purify the inlet water of Aha Reservoir by using lime neutralization and aeration oxidation, Though measures were taken to purify the inlet water, the Fe and Mn eoneen- trations in it remain much higher than the needed levels for the fresh water. In this study, we have done all-weather long on-spot eontinu- ous testing and analysis of the samples for their physical and chemical parameters measurement, in June and August （2010）, respectively, from the point of view of monitoring and seeming the reservoir water quality. And, then, further discussion was made to follow the various characteristics and contributory rates of iron and manganese to the water of Youyu River. Our research findings ean be shown as follows： the coalmine acid-drainage treated by added lime helps to increase the pH value of the water to meet the emission requirements, and the alkalinity of HCO3- has also been increased. In addition, it was found that according to the State Standard for the Surface Water Envi- ronment Quality （GB 3838--2002）, manganese content was over the stipulated limit from 91.7% in June and in August, while those of iron and manganese over 87.5% and 100%. The results indicated that there will be more than 23.57 t and 35.54 t of dissolved iron and manganese flowing into Aha Reservoir with the average concentration of iron and manganese being 0.65 mg/L and 0.98 mg/L. It has been proved that the iron and manganese eontents are elosely related not only with the sediment release of iron and manganese in the reservoir, but also the concentration of water flowing into and sediment released in the river.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2011年第5期98-102,共5页
Journal of Safety and Environment
基金
贵州省优秀青年科技人才项目(黔科通[2009]19号)
贵州省科技计划项目(黔科合SY字[2009]3059)
贵州大学研究生创新基金项目(校研理工:2010053)
关键词
环境工程学
阿哈湖
煤矿酸性废水
铁
锰
贡献率
environmental engineering
Aha Reservoir
acid coal mine drainage
iron
manganese
eontribution rate
