The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.
Environ Sci Pollut Res Int. 2013 Dec;20(12):8900-8. doi: 10.1007/s11356-013-1865-9. Epub 2013 Jun 8.
Drinking water treatment residuals (WTRs), nonhazardous by-products generated in a drinking water treatment plant, can be reused to immobilize phosphorus (P) to control the internal P loading from lake sediments for eutrophication control. Reasonably, before practical application, it is essential to determine the P immobilization capability of WTRs in lake sediments under various conditions. In this work, laboratory scale experiments were conducted to investigate the effects of light, microbial activity, and sediment resuspension on the P immobilization capability of WTRs. The results suggested that absence of light, low microbial activity, and sediment resuspension can increase the internal P loading from lake sediments. WTRs can, however, reduce the internal P loading significantly. Further analysis demonstrated that WTRs can stabilize P, decreasing the P bioavailability in the sediments under varied conditions. WTRs also presented little undesirable effects on the dissolved oxygen levels and pH of overlying water. Therefore, light, microbial activity, and sediment resuspension have little effect on the P immobilization capability of WTRs in lake sediments.
饮用水处理厂产生的非危险副产品——饮用水处理残余物（WTRs），可重复用于固定磷（P），以控制湖泊沉积物的内部磷负荷，从而达到控制富营养化的目的。合理地说，在实际应用之前，必须确定 WTRs 在各种条件下对湖泊沉积物中磷的固定能力。在这项工作中，进行了实验室规模的实验，以研究光、微生物活性和沉积物再悬浮对 WTRs 磷固定能力的影响。结果表明，缺乏光照、微生物活性低和沉积物再悬浮会增加湖泊沉积物的内部磷负荷。然而，WTRs 可以显著减少内部磷负荷。进一步的分析表明，WTRs 可以稳定 P，降低沉积物中 P 的生物可利用性，在不同条件下。WTRs 对上层水中的溶解氧水平和 pH 值也几乎没有不良影响。因此，光照、微生物活性和沉积物再悬浮对 WTRs 在湖泊沉积物中的磷固定能力几乎没有影响。
