补水条件改变对景观水体中沉积物氮磷释放的影响研究

发布时间：2018-01-10 18:11

本文关键词：补水条件改变对景观水体中沉积物氮磷释放的影响研究　出处：《西安建筑科技大学学报(自然科学版)》2017年05期 　论文类型：期刊论文

【摘要】：以再生水(TN、TP浓度较高)和河水(水质较好)补水的人工景观湖泊沉积物为研究对象,研究补水条件改变时沉积物中污染物的TN、TP吸附释放特性.结果表明:以再生水作为补水水源时,上覆水中TN、TP均表现为前期快速下降,而后逐渐达到平衡的过程;以自来水为补水水源时,表现为沉积物中污染物向水体的释放,以再生水补水的湖泊底泥释放大于以天然地表水为补水的湖泊底泥;以再生水补水的沉积物吸附-释放临界浓度高于以河流水补水沉积物,表明以再生水补水底泥的释放风险也越大;无论是何种补水形式和沉积物的类型,扰动均表现促进沉积物中污染物释放的趋势,且促进作用的强弱与沉积物中污染物的形态有关.
[Abstract]:With reclaimed water (TN, high TP concentration) and water (water well) replenishment of the artificial landscape lake sediments as the research object, TN pollutants in sediments to research the change of water conditions, adsorption and release characteristics of TP. The results show that with reclaimed water as make-up water for water and overlying water in TN, TP showed early the rapid decline, then gradually reached equilibrium process; using tap water as a water supply source, performance for pollutants into water release in the sediment, with reclaimed water replenishment of lake sediment release than that in natural surface water for the replenishment of lake sediment; sediment adsorption - regeneration water release critical concentration is higher than that of the river water sediment. That fill the bottom mud to release the risk of reclaimed water is greater; regardless of what type of water and sediment form, the disturbance showed wouldpromote sediment pollutant release trend, and promote the Strength and strength are related to the form of pollutants in the sediments.

【作者单位】：西安建筑科技大学环境与市政工程学院;西北水资源与环境生态教育部重点实验室;
【基金】：水体污染控制与治理科技重大专项(2012ZX07308-001-08、2013ZX07310-001)
【分类号】：X52
【正文快照】： 氮和磷是湖泊富营养化的重要影响因素,一方面氮和磷的过剩会导致水体的富营养化,另一方面氮、磷也是水体生态系统中必不可少的元素[1].水体中的氮、磷元素会随着水体中的一系列生物、物理、化学作用下聚积在沉积物中,同时在适当的情况下沉积物也会向水体中释放污染物,造成二次

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