混凝剂特性对建筑景观水水质维护效果的影响  

EFFECT OF COAGULATN CHARACTERISTICS ON WATER QUALITY MAINTENANCE OF ARCHITECTURAL LANDSCAPE WATER

作　　者：许美玲[1] 李星[1] 赵锂[2] 陈永[2] 杨艳玲[1] 苏兆阳[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]中国建筑设计研究院有限公司,北京100044

出　　处：《环境工程》2016年第2期47-50,73,共5页Environmental Engineering

基　　金：国家科技支撑计划"建筑室外水系维护与节水关键技术研究"(2013BAJ02B02)

摘　　要：建筑景观水体的水质会直接影响居民身体健康和生活环境,采用简单、高效的水质维护技术具有较大实用价值。采用混凝-沉淀法对比研究了硫酸铝（Al2（SO4）3）、聚合氯化铝（PAC）、三氯化铁（Fe Cl3）和聚合硫酸铁（PFS）4种常用混凝剂对建筑景观水体中主要污染物的去除效果,对混凝剂的电性中和特性与絮体特性进行初步分析。结果表明：在投药量为10~30 mg/L条件下PAC、PFS和Fe Cl3的混凝除污染效果均明显好于Al2（SO4）3;在投药量达到35 mg/L时,4种混凝剂的混凝效果趋于相近,均可达到较好的除污效果。由Zeta电位和絮体特性的分析可知：PAC电荷密度最高,PAC和PFS形成的絮体粒径和密度最佳。The health and living environment of residents are affected directly by water quality of architectural landscape water. It has great practical application value to apply simple and efficient water quality maintenance technique. The removal efficiencies of main pollutants by four commonly used coagulants（ aluminum sulfate（ Al_2（ SO_4）_3）,poly aluminum chloride（ PAC）,ferric chloride（ FeCl_3） and poly ferric sulfate（ PFS）） were comparatively studied in the coagulation-sedimentation experiments. The charge neutrality capability of coagulants and characteristic of floc were characterized. The results showed that the pollutant removal efficiencies of PAC,PFS and FeCl_3 were significantly better than that of Al_2（ SO_4）_3 when the dosages ranged from 10 to 30 mg / L. Coagulation effects of the four coagulants tended close,all of them could reach better removal efficiency when the dosage was 35 mg / L. The analysis of zeta potential and floc characteristic showed that PAC has the highest charge density,the particle size and density of the flocs formated by PAC and PFS was better than others.

关 键 词：建筑景观水 水质维护 混凝剂 絮体特性 除污效能 

分 类 号：X52[环境科学与工程—环境工程]