城市河流底泥污染负荷研究  

Study on Sediment Pollution Load of Urban Rivers

作　　者：刘方照 陈捷 李君菲 LIU Fangzhao;CHEN Jie;LI Junfei(Guangzhou Pujing Ecological Protection Technology Co.,Ltd.,Guangzhou 510535,China)

机构地区：[1]广州市璞境生态保护技术有限公司,广州510535

出　　处：《中国资源综合利用》2023年第10期171-174,共4页China Resources Comprehensive Utilization

摘　　要：在城市河流污染治理中,河道底泥是不可忽视的污染源。本研究采集受生活污染源影响的城市河流底泥,通过室内试验,分析静置及扰动条件下底泥中污染物释放量及释放速率,为城市河流污染源整治提供数据参考。试验结果显示,在底泥上覆水体静置或者扰动状态下,底泥都将持续向上覆水体释放污染物。静置条件下,以底泥质量、接触面积和底泥体积计,氨氮7 d平均污染负荷分别为10.52 mg/(kg·d)、304.08 mg/(m^(2)·d)、13 227.34 mg/(m^(3)·d),总磷7 d平均污染负荷分别为0.05 mg/(kg·d)、1.42 mg/(m^(2)·d)、61.57 mg/(m^(3)·d);扰动条件下,污染物释放量增大,以底泥质量、接触面积和底泥体积计,氨氮7 d平均污染负荷分别为17.25 mg/(kg·d)、504.41 mg/(m^(2)·d)、21 941.78 mg/(m^(3)·d),总磷7 d平均污染负荷分别为1.33 mg/(kg·d)、39.01 mg/(m^(2)·d)、1 696.77 mg/(m^(3)·d)。研究表明,内源污染不可忽视,是影响城市河流水质的重要因素。In urban river pollution control,river sediment is a significant source of pollution that cannot be ignored.This study collects sediment from urban rivers affected by domestic pollution sources,and conducts indoor experiments to analyze the release amount and rate of pollutants in sediment under static and disturbed conditions,thus providing data reference for the remediation of urban river pollution sources.The experimental results show that under the static or disturbed state of the overlying water body of the sediment,the sediment will continue to release pollutants into the overlying water body.Under static conditions,calculated by the sediment quality,contact area,and sediment volume,the average pollution loads of ammonia nitrogen for 7 d are 10.52 mg/(kg·d),304.08 mg/(m^(2)·d),13227.34 mg/(m^(3)·d),and the average pollution loads of total phosphorus for 7 d are 0.05 mg/(kg·d),1.42 mg/(m^(2)·d),and 61.57 mg/(m^(3)·d),respectively;under disturbance conditions,the release of pollutants increases,calculated by the sediment quality,contact area,and sediment volume,the average pollution loads of ammonia nitrogen for 7 d are 17.25 mg/(kg·d),504.41 mg/(m^(2)·d),and 21941.78 mg/(m^(3)·d),respectively,and the average pollution loads of total phosphorus for 7 d are 1.33 mg/(kg·d),39.01 mg/(m^(2)·d),and 1696.77 mg/(m^(3)·d),respectively.Research has shown that endogenous pollution cannot be ignored and is an important factor affecting the water quality of urban rivers.

关 键 词：底泥 内源污染 污染负荷 城市河流 黑臭水体 

分 类 号：X524[环境科学与工程—环境工程]