Source Journal of CSCD
Source Journal for Chinese Scientific and Technical Papers
Core Journal of RCCSE
Included in JST China
Volume 41 Issue 12
Dec.  2023
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XUE Chonghua, ZHAO Yimeng, SUN Jiarong, LUO Cheng, Li Wenhui, WANG Qing, LI Junqi, HUANG Xin. EFFECTS OF WATER ENVIRONMENTAL FACTORS ON NITROGEN AND PHOSPHORUS RELEASE FROM PIPELINE SEDIMENTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 89-98. doi: 10.13205/j.hjgc.202312011
Citation: XUE Chonghua, ZHAO Yimeng, SUN Jiarong, LUO Cheng, Li Wenhui, WANG Qing, LI Junqi, HUANG Xin. EFFECTS OF WATER ENVIRONMENTAL FACTORS ON NITROGEN AND PHOSPHORUS RELEASE FROM PIPELINE SEDIMENTS[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(12): 89-98. doi: 10.13205/j.hjgc.202312011

EFFECTS OF WATER ENVIRONMENTAL FACTORS ON NITROGEN AND PHOSPHORUS RELEASE FROM PIPELINE SEDIMENTS

doi: 10.13205/j.hjgc.202312011
  • Received Date: 2023-10-22
    Available Online: 2024-03-08
  • The release of nitrogen and phosphorus from pipe sediments during stormwater runoff is the main cause of eutrophication in receiving waters. However, different receiving waters have different effects on the transport and transformation of nitrogen and phosphorus in pipeline sediments due to different water quality factors such as pH, temperature, and initial concentration of nitrogen and phosphorus. Therefore, in this study, we collected pipeline sediments, reclaimed water and natural river water, analyzed the pollution characteristics of the sediments and water samples, and then simulated the process of pipeline sediments entering into different receiving waters by mixing the sediments with different water bodies, explored the characteristics and mechanism of nitrogen and phosphorus release, and analyzed the effects of typical water environment factors on the release of nitrogen and phosphorus from pipeline sediments. The results showed that both river water and reclaimed water had a promoting effect on the release of nitrogen (including total nitrogen TN and ammonia nitrogen NH4+-N) in pipeline sediments, while inhibiting the release of total phosphorus (TP), in which the reclaimed water had a stronger promoting effect on the release of total nitrogen and ammonia nitrogen (NH4+-N) but a stronger inhibiting effect on the release of total phosphorus; the releases of TP, NH4+-N and TN from the pipeline sediments were reduced with the increase of pH The release fluxes of the three substances in different environments were in the following order: acidic>neutral>alkaline, which might be related to ion exchange and physical adsorption in the aqueous environment; the release intensity of TP, NH4+-N and TN in pipeline sediments was enhanced with increasing temperature; the release of TP and NH4+-N from pipeline sediments was inhibited with the increase of the concentrations of TP and NH4+-N in the aqueous environment When the initial TP and NH4+-N concentrations were 0.232 mg/L and 0.240 mg/L, respectively, their corresponding equilibrium concentrations of nitrogen and phosphorus release were reached. This study helps to understand the mechanism of nitrogen and phosphorus release from pipeline sediments into different receiving water bodies, with a view to providing a scientific basis for the regulation of eutrophication pollution in urban landscape water bodies caused by stormwater runoff pollution.
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