城市再生水中大肠杆菌在浮选过程中迁移规律  

Transport of E. coli of reclaimed water in flotation system

作　　者：窦培谦[1,2] 寇珏[1] 孙春宝[1] 李明颖[1] DOU Pei-qian KOU Jue SUN Chun-bao LI Ming-ying(School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China Department of Safety Engineering, China University of Labor Relations, Beijing 100048, China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]中国劳动关系学院安全工程系,北京100048

出　　处：《工程科学学报》2017年第5期669-675,共7页Chinese Journal of Engineering

摘　　要：通过再生水模拟浮选试验和吸附、解吸附试验分析研究了城市再生水中大肠杆菌在浮选过程中的迁移规律.研究结果表明:再生水中大肠杆菌能够快速被矿物颗粒吸附,尾矿废水继续回用于浮选流程是安全的,但精矿、中矿、尾矿中吸附了大量的大肠杆菌,在特定暴露水平下会对从业人员构成健康风险;矿物颗粒对大肠杆菌的吸附是影响再生水中大肠杆菌在浮选过程迁移的主要因素;随着大肠杆菌浓度的升高,大肠杆菌衰减率、吸附速率随之下降;矿物颗粒对大肠杆菌的吸附对pH变化敏感,随着pH升高,矿物颗粒对大肠杆菌的吸附呈下降趋势,捕收剂煤油、Pj053和调整剂CaO的加入会明显提高矿物颗粒对大肠杆菌的吸附.The transport of E. coli in reclaimed water in floatation system was investigated through simulate flotation, adsorption experiment and desorption experiments. The results show that E. coli in reclaimed water is rapidly adsorbed by ore particles, while tailing waste water can be reused to floatation safely. However, concentrates, middlings and tailings can pose health risks under certain exposure conditions. The transport of E. coli in flotation processes is dominated by the attachment of E. coli onto ore particles. Removal and adsorption rates decrease as the concentrations of E. coli increase. Meanwhile, E. coli adsorption on ore particles is sensitive to the changes of solution pH, and decreases as the solution pH increases. The attachment of E. coli onto mineral particles increases significantly at the presence of collector kerosene, PJ053, and the pH-adjusting agents CaO.

关 键 词：再生水 大肠杆菌 浮选 迁移 吸附 

分 类 号：TD782[矿业工程—矿井通风与安全]