山地城市排水管网特细颗粒物特性及变化规律  

Characteristics and Variation of Superfine Particles in a Drainage Pipe Network of a Mountainous City

作　　者：吉芳英[1] 晏鹏[1] 

机构地区：[1]重庆大学,三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《环境科学研究》2012年第3期322-327,共6页Research of Environmental Sciences

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07318-008-003);重庆市重大科技专项(CSTC,2008AB7133)

摘　　要：对山地城市排水管网中特细颗粒物的粒径分布特征及变化规律、Zeta电位分布特征及变化规律和ρ(SS)的变化规律进行研究,同时对相关水化学参数(如电导率、pH)的变化规律进行了分析.结果表明:特细颗粒物的平均粒径、Zeta电位、ρ(SS)和电导率分别为21.04～73.53μm、-20.83～-11.15 mV、106～492 mg/L和973～2 445μS/cm,其统计平均值分别为(43.74±14.12)μm、(-17.95±1.88)mV、(233±90)mg/L和(1 343±331)μS/cm;pH为7.25～7.63.工业废水的排入对排水管网特细颗粒物的粒径分布特征、Zeta电位分布特征以及电导率有显著的影响并呈现出一定的规律性;传统沉砂池对进水中特细颗粒物的去除能力相当有限,特细颗粒物会直接进入生物处理系统.The size distribution characteristics, Zeta potential and p（SS） of superfine particles in the drainage pipe network of a mountainous city were investigated. The chemical parameters of the wastewater, such as electric conductivity and pH, were also analyzed. The results showed that particle size, Zeta potential, p（SS） and conductivity ranged from 21.04-73.53 p^m, -20.83- - 11. 15 m V, 106- 492 rag/L, and 973-2445 p^S/cm, respectively. The average values of these parameters were （43.74 _＋ 14. 12） [~m, （ - 17.95 ＋ 1.88 ） mV, （233 -＋ 90） rag/L, and（ 1343 ＋ 331 ） fxS/cm, respectively. The pH ranged from 7.25 to 7.63. According to the results, industrial wastewater had a significant and regular impact on the size distribution and Zeta potential of superfine particles in the drainage pipe network. In addition, superfine particles could be directly carried into biological treatment systems because of the limited removal ability of the traditional grit chamber on superfine particles.

关 键 词：特细颗粒物 ZETA电位 粒径分布特征 山地城市排水管网 

分 类 号：X502[环境科学与工程—环境工程]