The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
Chemosphere. 2013 May;91(9):1344-8. doi: 10.1016/j.chemosphere.2013.02.003. Epub 2013 Mar 1.
The use of drinking water treatment residuals (WTRs) to immobilize P in sediments is a novel approach for lake restoration. However, the lability of P in WTRs-amended sediments may vary with many factors, e.g., hydrogen sulfide content. Earlier works in our laboratory have demonstrated that WTRs are effective sorbents for hydrogen sulfide in water. Thus, we hypothesized that the lability of P in WTRs-amended sediments would not be increased by hydrogen sulfide. The results of this work suggested that this hypothesis was tenable. Compared to the raw sediments, the amended sediments had significantly lower P desorption potential in the presence of hydrogen sulfide at different times, pH and concentrations. Moreover, the amended sediments were also better able to adsorb hydrogen sulfide. In the amended sediments, the P, which was easily desorbed due to the effect of hydrogen sulfide, was transformed into the Fe/Al bound P.
利用饮用水处理厂污泥(WTR)固定沉积物中的磷是湖泊修复的一种新方法。然而，WTR 处理后的沉积物中磷的不稳定性可能受到许多因素的影响，例如硫化氢的含量。我们实验室的早期研究表明，WTR 是水中硫化氢的有效吸附剂。因此，我们假设硫化氢不会增加 WTR 处理后的沉积物中磷的不稳定性。这项工作的结果表明，这个假设是合理的。与原状沉积物相比，在不同时间、pH 值和浓度下，添加 WTR 后的沉积物在存在硫化氢时的磷解吸潜力明显较低。此外，添加 WTR 后的沉积物还能更好地吸附硫化氢。在添加 WTR 的沉积物中，由于硫化氢的影响而易于解吸的磷被转化为铁/铝结合磷。
