浅析环境因子对城市缓流水体底泥磷释放的影响

Analysis of the Influence of Environmental Factors on the Release of Phosphorus from Sediment of Urban Lagging Water

水体富营养是当今世界面临的一个严重环境问题。造成富营养化的限制因子主要是氮和磷,尤其是磷。对于大多数外源磷得到控制的水体来说,底泥磷的释放对长期维持藻类生长,促进水体富营养化的发展具有举足轻重的作用。但是,底泥对磷的释放与吸收是有条件的,它受到多种因素的影响。在此采用实验模拟的方法,考察温度、pH值、扰动、溶解氧、不同深度、覆盖等环境因子对底泥磷释放的影响,进行初步为城市缓流水体富营养化的防治及治理积累基础资料和信息。

Water eutrophication is a serious environmental problem today. The main limited factors leading to eutrophication are N and P, in particular P. For the majority of water that the external source phosphorus is controlled, phosphorus release from sediment plays an important role in the promotion of long-term growth of algae and in the development of water eutrophication. However, the release and absorption Of sediment to phosphorus is conditional, which is subject to a variety of factors. In this paper, the experimental and simulative method is adopted. The influence of many environmental factors such as temperature, pH values, disturbance, dissolved oxygen, different depth, and coverage etc, on the release of phosphorus from sediment is reviewed, aiming preliminarily to accumulate data and information for the prevention and treatment of eutrophication of urban lagging water.