摘要
了解垃圾堆放场堆存生活垃圾的污染物含量及浸泡条件下污染物的溶出规律,有助于正确评价垃圾堆放场所带来的环境影响,从而为政府部门的决策提供依据。文章以三峡库区为例,通过测定三峡库区主要垃圾堆放场堆存生活垃圾总磷的含量,分析它们的分布特征,并且进行生活垃圾浸泡条件下总磷的溶出实验,分析它们的溶出规律,为三峡库区的环境保护提供帮助。结果表明,(1)三峡库区生活垃圾总磷的含量位于50～3290mg/kg之间,总磷分布集中于100～1600mg/kg之间,且区域差异较大;(2)生活垃圾淹没条件下总磷的释放规律为开始较慢,逐渐增大,达到最大值以后减少,最后趋于稳定;(3)生活垃圾淹没条件下总磷的单位溶出量与时间的关系满足逻辑斯特模型w=α/[1+βexp(-kt)],且垃圾单位可溶出量α随质量增加而减少,利用本模型可以预测垃圾进入水体后总磷溶出的初期行为。
It is of great importance to investigate the pollutant content of refuse in dumping sites and to understand its leaching rules when the refuse is submerged under water. These results can help decision-makers to accurately evaluate environment impact of refuse dumping sites and to make sound decisions. This paper, taking the Three Gorges region as an example, analyzes the distribu- tion characteristic of total phosphorus by way of determining its content in main dumping sites in the Three Gorges region and inves- tigates the leaching rule of total phosphorus through leaching experiments on the condition that refuse was submerged under water. The results show that (1) In the Three Gorges region, the content of total phosphorus is between 50 and 3 290 mg/kg with a great dependence on location. (2) When refuse is submerged under water, the leaching speed rate of total phosphorus is keep increasing, with a slow on at the beginning, until arriving at its maximum, and then the leaching speed rate decreases, until becoming stable. (3) The relationship between leached total phosphorus of submerged refuse and time satisfies Logistic equation w=α/[1+ βexp(-kt)]. And total phosphorus per unit which can be leached from submerged refuse increases with increasing of refuse’s quantity. This model can forecast initial leaching behavior of total phosphorus in refuse when this refuse is submerged under water.
出处
《生态环境》
CSCD
2004年第4期581-584,共4页
Ecology and Environmnet
基金
国务院三峡工程建设委员会项目(SX[2000]-001)
关键词
三峡库区
生活垃圾
总磷
溶出规律
分布特征
Three Gorges region
refuse
total phosphorus
leaching rule
distribution characteristics
