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1

Transformation of pollutants in the stormwater treatment process

100%
Walega A., Cupak A., Pawelek J., Michalec B.
Polish Journal of Environmental Studies
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2014
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tom 23
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nr 3
Our paper evaluates the effectiveness of pollutant removal from stormwater in a semi-natural treatment plant and develops stochastic models of their transformations in a soil bed. The examined wastewater treatment facilities consisted of reduction chambers and a retention-infiltration reservoir. The following indicators of pollution were subjected to analysis: BOD₅, COD, total suspended solids, and chlorides. It was shown that COD, total suspended solids, and chlorides are the indicators that have the greatest impact on stormwater quality. However, the possibility of removal of the analyzed pollutants from stormwater is affected by the sedimentation process occurring in the reduction chambers and in the retention-infiltration reservoir, as well as by the process of infiltration through the soil bed. The developed models of pollutant transformation during wastewater infiltration through the bed were presented as the regression equations, where the selected pollution indicators in the filtrate were the dependent variable, while the analyzed pollution indicators in water from the retention-infiltration reservoir, coefficients of constant reaction kinetics determined for each variable, and the time of infiltration of wastewater through the soil bed were adopted as independent variables.
2
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Assessment of the effect of rainfall dynamics on the storm overflow performance

100%
Szelag B.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
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2016
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tom 48
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nr 2
3

Base-treated juniper fiber media for removing heavy metals in stormwater runoff

67%
Min S. H., Eberhardt T. L., Jang M.
Polish Journal of Environmental Studies
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2007
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tom 16
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nr 5
731-738
The viability of base-treated juniper fiber (BTJF) media for removing toxic heavy metals (Cd2+, Cu2+, Pb2+, Zn2+) in stormwater runoff was investigated. The sorption ability of the BTJF for all metals was much higher than that of untreated juniper. The affinity sequence of both materials, BTJF and untreated juniper, was Pb > Cu > Zn > Cd. This order is explained by the hydrolysis constants for each metal. A metal desorp­tion and column regeneration test using 0.1 M nitric acid showed that the metal sorption capacity declined slightly from 136.3 to 119.2 ^mole/g in the first two cycles and then more significantly at the third and fourth regeneration, 72.3 and 83.1 ^mole/g, respectively. Based on the hydraulic conductivity test of BTJF of different size classes, it can be deduced that there is no major headloss-related disadvantage in using BTJF instead of sand as stormwater filter media if the particle size of the BTJF is similar to that for sand.
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