新型物化凝聚剂控制河道底泥营养盐释放的研究
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摘要：通过实验室模拟试验，考察了一种新型物化凝聚剂在不同投加量和反应时间条件下控制污染河道底泥营养盐释放的效率。结果表明，在污染河道底泥中注入新型物化凝聚剂48 h内，底泥表层结构呈现多孔性的渐变过程，微生物生存环境得到一定的改善；对上覆水体中营养物质的测定发现，新型物化凝聚剂注入底泥中能有效抑制底泥中总氮（TN）、氨氮和总磷（TP）的释放，同时也抑制了上覆水体中氧化还原电位（ORP）和化学需氧量（COD）浓度的上升；新型物化凝聚剂投加量越大，控制底泥营养盐释放的效果越好。上述结果表明，采用新型物化凝聚剂对污染河道底泥进行原位改良，可成为底泥就地处理和控制河道底泥营养盐释放的一种技术方法和发展方向。
关键词：新型物化凝聚剂；底泥；营养盐释放
中图分类号：X522 文献标识码：A 文章编号：0439-8114（2016）17-4390-04
DOI：10.14088/j.cnki.issn0439-8114.2016.17.009
Abstract： Using a lab experiment， the efficiency of a new chemical flocculant on control of nutrient salt release from sediments in polluted river was examined under the condition of the different dosage and reaction time. The results showed that， after the new chemical flocculant was injected into the sediments of polluted river， the surface structure of sediment changed gradually into the state of the porosity， and the microbial survival environment was certainly to be some improvements in about 48 hours. The nutrient salt in the overlying water was measured， which showed the new chemical flocculant could effectively control the release of total nitrogen， ammonia-nitrogen and total phosphorus， and could control the increase of ORP and COD. The more dosing of the new chemical flocculant was used， and the better effect on control of nutrient salt release from sediments wa...
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