新型物化凝聚剂控制河道底泥营养盐释放的研究  

Research of New Chemical Flocculant on Control of Nutrient Salt Release from Sediments in River Channel

作　　者：卜勇[1] 崔康平[1] 慈曾福 王斌[2] 王郑[1] 孟蓉[1] 颜琨[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]合肥市排水管理办公室,合肥230001

出　　处：《湖北农业科学》2016年第17期4390-4393,共4页Hubei Agricultural Sciences

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07303-002)

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。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 was obvious. The above results demonstrated that according to the experiment, the new chemical flocculant could still work effectively and would become the main measures adopted in the areas in the future.

关 键 词：新型物化凝聚剂 底泥 营养盐释放 

分 类 号：X522[环境科学与工程—环境工程]