太浦河与京杭大运河交汇处污水处理厂尾水中锑的迁移与富集

【作者】 田丰彦； 李飞鹏；

【机构】 上海理工大学环境与建筑学院；

【摘要】 文中对太浦河与京杭运河水流交汇区范围内的水体、沉积物Sb的迁移与富集进行了研究。结果发现:水流交汇区溶解态Sb浓度为2.77μg/L,主要在南部聚集;京杭运河溶解态Sb要高于太浦河,二者有显著性差异;悬浮颗粒态Sb浓度为0.36μg/L,主要在东部聚集,SJC区域与其他区域有显著性差异;沉积物Sb含量为1.48 mg/kg,BHC区域Sb含量最高;草荡和莺脰湖属河湖中转位置,水动力复杂,它们既是污水厂尾水主要的"汇"又是太浦河的"源";太浦河经过水流交汇区前后,Sb含量由0.93mg/kg变为1.53mg/kg。研究结果表明:污水厂尾水中溶解态Sb一部分随支流扩散,造成水流交汇区南侧溶解态Sb浓度明显高于北部;一部分随澜溪塘进入莺脰湖,与SPM结合,形成悬浮颗粒态Sb,造成SJC高浓度的悬浮颗粒态Sb;水流交汇区的"源汇"作用会使污染物聚集。合理提高污水处理厂排水重金属标准,可以极大的降低尾水中污染物指标,对恢复和改善区域水环境具有重要意义。更多还原

【Abstract】 The migration and enrichment of water and sediment Sb within the confluence area of the Taipu River and the Beijing Hangzhou Canal were studied in the article.The results showed that the dissolved Sb concentration in the confluence area of the water flow was 2.77 μg/L,mainly concentrated in the south.The dissolved Sb in the Beijing Hangzhou Canal was higher than that in the Taipu River,and there was a significant difference between these two regions.The concentration of suspended particulate Sb was 0.36 μg/L,mainly concentrated in the east.There was a significant difference between SJC region and other regions.The sediment Sb was 1.48 mg/kg,with the highest Sb in the BHC area.CD and YDH were transitional locations between rivers and lakes,with complex hydrodynamic forces.They were both the main "sink" of the tail water of the sewage plant and the "source" of the Taipu River.Before and after passing through the confluence area of the Taipu River,the Sb content increased from 0.93 mg/kg to 1.53mg/kg.The research results indicated that a portion of dissolved Sb in the tail water of the sewage plant diffused with the tributaries,resulting in a significantly higher concentration of dissolved Sb on the south side of the water flow intersection area than on the north side.Part of it entered YDH along with Lanxi Pond and combined with SPM to form suspended particulate Sb,resulting in high concentration of suspended particulate Sb in SJC.The "source and sink" effect of the water flow convergence zone could cause pollutants to accumulate.Reasonably improving the heavy metal standards for wastewater treatment plant drainage can greatly reduce the pollutant indicators in the tail water.It is of great significance for restoring and improving the regional water environment.更多还原