摘要
在三江平原气候条件下,配制以NO3--N、NH4+-N和PO4--P为主要成分的模拟进水,通过间歇运行方式,考察潜流人工湿地模拟系统中氨氮反应与pH变化的关系。结果表明,湿地系统对高pH值进水具有缓冲作用。在运行期间,土壤-炉渣湿地上层pH小于下层pH值,土壤湿地上层pH大于下层pH值。随着停留时间(HRT)的增加和NH4+-N浓度的降低,湿地系统中的pH值呈现规律性变化,土壤-炉渣湿地的氧化还原电位(ORP)与pH值呈负相关。湿地系统中pH值变化曲线的拐点可作为NH4+-N反应结束的指示参数。
Under the climate conditions of Sanjiang Plain,relationship between ammonia nitrogen reaction and pH variation in the subsurface flow constructed wetland system with wastewater containing ammonia nitrogen（NH＋4-N）,nitrate nitrogen（NO-3-N） and phosphate phosphorus（PO-4-P） as the main component was investigated by intermittent operation.Results demonstrated that all wetland system imparts excellent buffering action to the high pH wastewater.pH value in the upper layer of soil constructed wetland was lower than that of the deep layer.pH value in the wetland system changed regularly with the HRT and concentration of NH＋4-N.A negative correlation was found between pH value and redox potential（ORP） in the soil-slag constructed wetland.The break-point of pH curve indicate the termination of NH＋4-N reaction in constructed wetland.
出处
《水土保持学报》
CSCD
北大核心
2010年第3期243-246,共4页
Journal of Soil and Water Conservation
基金
中国科学院知识创新项目(KZCX2-YW-Q06-03)
国家自然科学基金项目(40901128)
