不同材料对磷和铁的吸附性能研究  

Studies on Adsorption Properties of Different Materials to Phosphorus and Iron

作　　者：李晨 徐云兰[1] 钟登杰[1] 廖新荣[1] 苏定江 吕波 LI Chen;XU Yunlan;ZHONG Dengjie;LIAO Xinrong;SU Dingjiang;LV Bo(School of Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing Municiplal Research Institute of Design,Chongqing 400020,China)

机构地区：[1]重庆理工大学化学化工学院,重庆400054 [2]重庆市市政设计研究院,重庆400020

出　　处：《环境保护科学》2019年第2期34-40,共7页Environmental Protection Science

基　　金：重庆悦来投资集团有限公司提供资金支持;海绵城市建设雨水资源化利用(2016Q151);海绵城市建设雨水污染削减率研究(2016Q150)资助

摘　　要：文章以P、Fe为处理对象,考察了活性炭、沸石、陶粒和石英砂4种材料的吸附特性。结果表明:当pH为7.0时,P的饱和吸附量依次为活性炭(0.14 mg/g)>沸石(0.09 mg/g)>陶粒(0.08 mg/g)>石英砂(0.06 mg/g),Fe的饱和吸附量依次为活性炭(0.79 mg/g)>陶粒(0.76 mg/g)>沸石(0.51 mg/g)>石英砂(0.26 mg/g);颗粒内扩散模型表明各材料对P、Fe的吸附分为表面扩散和内扩散2个阶段,且内扩散为速率控制步骤,吸附饱和时间为240 min;(3)P和Fe的有利吸附条件分别为酸性和碱性,结合实际水体的pH和实验结果,pH为7.0最为合适;随材料投加量增加,P和Fe的单位吸附量减少,但去除率增大;吸附材料的最佳投加量为100 g/L。The adsorption properties of four kinds of materials which include activated carbon,zeolite,ceramsite and quartz sand were investigated with iron and phosphorus as targeted pollutants.The results indicated that the comparision of saturated adsorption capacity for P was active carbon (0.14 mg/g)>zeolite (0.09 mg/g)>ceramsite (0.08mg/g)>quartz sand (0.06 mg/g) and the saturated adsorption capacity for Fe was actived carbon (0.79 mg/g)>ceramsite (0.76 mg/g)>zeolite (0.51 mg/g)>quartz sand (0.26 mg/g),respectively,when pH was 7.In addition,the particle diffusion model showed that the adsorption of phosphorus and iron was divided into two stages(the surface diffusion and the internal diffusion),which the internal diffusion was the rate control step with 240 min adsorption saturation time.Acidic and alkaline conditions were favorable to the adsorption of phosphorus and iron,respectively.The best pH was 7 based on actual water sample test and experimental results.It was also found that the unit adsorption quantity of iron and phosphorus decreased with the increase of the amount of materials,but the removal efficiency still increased.The optimum dosage of adsorption materials was 100 g/L.

关 键 词：磷 铁 吸附特性 投加量 

分 类 号：X52[环境科学与工程—环境工程]