Distribution coefficients of nitrogen pollutants between water and sediment and their environmental risks in Lingang hybrid constructed wetland fed by industrial tailwater, Tianjin, China

2021 ◽  
Author(s):  
Quanli Man ◽  
Hongrui Li ◽  
Xiaodong Ma ◽  
Peng Gao ◽  
Gengbo Ren ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Distribution Coefficients ◽  
Environmental Risks ◽  
Water And Sediment ◽  
Nitrogen Pollutants

scholarly journals Distribution Coefficients of Nitrogen Pollutants Between Water-Sediment And Their Environmental Risks In Lingang Hybrid Constructed Wetland Fed By Industrial Tailwater, Tianjin, China

2021 ◽  
Author(s):  
Quanli Man ◽  
Hongrui Li ◽  
Xiaodong Ma ◽  
Peng Gao ◽  
Gengbo Ren ◽  
...  
Keyword(s):  
Pollution Index ◽  
Distribution Coefficients ◽  
Environmental Risks ◽  
Pollutant Removal ◽  
Control Measures ◽  
Polluted Water ◽  
Temporal Perspective ◽  
Fate Of Nitrogen ◽  
Risks Assessment ◽  
Nitrogen Pollutants

Abstract Exploring the fate of nitrogen pollutants in constructed wetlands (CWs) fed by industrial tailwater is significant to strengthen its pollution control and promoting the development of CWs in the field of micro-polluted water treatment. In this study, the distribution coefficients and the environmental risks of nitrogen pollutants between water-sediment of the hybrid CW in Tianjin were systematically investigated. From a spatial perspective, the nitrogen pollutants could be removed in this hybrid CW, and subsurface flow wetland played a key role in nitrogen pollutant removal. From a temporal perspective, the consistence of nitrogen pollutants was largely affected by the dissolved oxygen (DO) and temperature. The distribution coefficient of nitrogen pollutants between water-sediment was further clarified, suggesting that NH4+-N was more likely to be enriched in sediments due to microbial process. The overall level of pollution in hybrid CW was moderate according to the nutritional pollution index (NPI) analysis. The risks assessment indicated that timely dredging control measures should be considered to maintain the performance of hybrid CW.

scholarly journals Preliminary Monitoring of Praziquantel in Water and Sediments at a Japanese Amberjack (Seriola quinqueradiata) Aquaculture Site

Fishes ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 24
Author(s):  
Atsushi Ido ◽  
Motohisa Kanemaru ◽  
Yoshiharu Tanioka
Keyword(s):  
Active Compound ◽  
Environmental Effect ◽  
Environmental Risks ◽  
Post Treatment ◽  
Sediment Samples ◽  
Detectable Limit ◽  
Water And Sediment ◽  
Aquaculture Industry ◽  
Seriola Quinqueradiata ◽  
Preliminary Study

Praziquantel (PZQ), an active compound against Platyhelminthes, is an essential anthelmintic for the aquaculture industry. However, there are few reports of the environmental risks of PZQ use in aquaculture. In this study, we monitored PZQ in water and sediment at an aquaculture site of Japanese amberjack, also called yellowtail (Seriola quinqueradiata). Although PZQ was detected in water during treatment and 3 days post-treatment, PZQ levels were below the detectable limit in water 60 m from the net pen during the treatment, and in all sediment samples. In this preliminary study, we could not detect residue of PZQ from sediments in the aquaculture site, and no evidence about environmental effect of PZQ administration was obtained.

scholarly journals Distribution and accumulation of heavy metals in the water and sediments of the River Sava

2011 ◽  
Vol 76 (5) ◽  
pp. 795-803 ◽  
Author(s):  
Zivorad Vukovic ◽  
Mirjana Radenkovic ◽  
Srboljub Stankovic ◽  
Dubravka Vukovic
Keyword(s):  
Heavy Metals ◽  
River Water ◽  
Equilibrium Distribution ◽  
Distribution Coefficients ◽  
Water And Sediment ◽  
Liquid Phases ◽  
Urban Settlements ◽  
Accumulation And Enrichment

The distribution and accumulation of assorted heavy metals and a long-lived radionuclide (Cu, Zn, Pb, Cd, U, Th and 137Cs) in the water and sediment of the River Sava (in Serbia) were investigated at three locations in the vicinity of industrial and urban settlements (Sabac, Obrenovac, Belgrade). The concentrations of heavy metals in the sediment were found to be in the ranges: 29.6-145.1 mg kg-1 for Cu, 53.2-253.6 mg kg-1 for Zn, 14.2- 78.6 mg kg-1 for Pb, 0.3-24.6 mg kg-1 for Cd and 4.0-12.5 Bq l-1 for 137Cs. These values correlate to the concentrations in the river water if expressed by equilibrium distribution coefficients Kd (dm3 g-1) between the solid and liquid phases. The degrees of accumulation and enrichment of tracer metals were determined.

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