摘要
持久性有机污染物(POPs)在多沙河流中的迁移转化行为受到初始浓度、泥沙特性、水环境化学条件、水文特性、生物活动等多种因素影响,非常复杂.为减少数学模型的率定参数,本文基于去除率假设提出综合作用系数K,概化所有过程对POPs迁移转化的影响,并采用实验数据对其影响因素进行分析并拟合得到其函数曲线.研究结果显示:(1)K随着泥沙浓度、共存金属离子浓度增大而增大;(2)K随泥沙粒径、POPs初始浓度、温度增大而减小;(3)在近中性条件下,K值达到最大;(4)拟合得到的建立的函数关系能有效反映POPs与各因素间的量化关系,但受实验数据有限,实验条件不一等原因影响,K值仍存在一定误差.
In the river with high concentration sediments,the migration behavior of the Persistent Organic Pollutants(POPs) is complicated which could be affected by lots of factors such as the initial concentration of pollutant,sediment characteristics,chemistry condition and hydrological characteristics of the river,and also the biological activities in the river.In order to analyse the pollutant migration characteristics,a coefficient was suggested to estimate the impact of various factors on POPs,and relations between and the factors were respectively analysed on the bases of many experimental data.The results showed that(1) would increase when the sediment concentration and coexistent metal ion concentration increased;(2) with the increase of the sediment particle size,pollutant initial concentration and temperature,would decrease;(3) under the neutral condition of PH,would reach its max value;(4) the calibrated results showed that the simple model based of have a good accuracy to analyses the quantity relationship between POPs and its impact factors,however,this simple model should be further improved by a series of experimental data in different conditions.
出处
《应用基础与工程科学学报》
EI
CSCD
2009年第S1期125-135,共11页
Journal of Basic Science and Engineering
基金
水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2008-B-05)
教育部新世纪优秀人才支持计划(NCET-08-0597)资助
关键词
持久性有机污染物
多沙河流
迁移转化
综合作用系数
persistent organic pollutants(POPs)
river with high concentration sediments
impact factors
the comprehensive coefficient
