摘要
在黑臭水体综合治理中,清淤是消除内源污染的有效方法。合理确定疏浚深度,是消除内源污染的首要问题。通过视觉分层法、含量分析法及释放试验法,对沙河底泥污染物含量及释放量进行分析,最终确定将底泥中重金属污染物超标或TN含量1 500 mg/kg或TP含量500 mg/kg作为底泥清淤控制指标的限值。按此标准确定清淤厚度为0.3~4.4 m,清除底泥约37.17万m^3,可清除TN 1 848.75 t、TP 825.62 t,有效清除了内源污染,为沙河后期水体的生态修复提供较好的内在条件。
In the comprehensive treatment of black and odorous water, dredging is an effective method to eliminate endogenous pollution. Reasonable determination of dredging depth is the first question to eliminate endogenous pollution. Through the visual stratification method, the content analysis method and the release experiment method,we analyze the pollutant content and release amount of Shahe River sediment.Finally,determine the excessive heavy metal pollution or TN content is 1, 500 mg/kg or TP content is 500 mg/kg as the limit of sediment dredging control indicators.According to this standard, we determine that the thickness of the dredging is from 0. 3 to 4. 4 m.The total dredging of the sediment is about 371,700 m^3,which can remove TN 1,848. 75 t and TP 825. 62 t, and effectively remove the endogenous pollution. It will provide better internal conditions for the ecological restoration of water body in the late Shahe River.
作者
宋成涛
吴立志
SONG Cheng-tao;WU Li-zhi(CCCC Second Harbor Consultants Co.Ltd.Wuhan 430060 Chin)
出处
《水运工程》
北大核心
2018年第8期200-204,213,共6页
Port & Waterway Engineering
关键词
黑臭水体
污染底泥
内源污染
总氮量
总磷量
重金属污染
black and odorous water
contaminated sediment
endogenous pollution
TN
TP
heavy metal pollution
