Retention of pharmaceutical residues and microorganisms at the Altendorf retention soil filter

2014 ◽  
Vol 70 (9) ◽  
pp. 1503-1509 ◽  
Author(s):  
E. Christoffels ◽  
F. M. Mertens ◽  
T. Kistemann ◽  
C. Schreiber
Keyword(s):  
Escherichia Coli ◽  
Heavy Metals ◽  
Giardia Lamblia ◽  
Microbial Contamination ◽  
Advanced Treatment ◽  
Organic Micropollutants ◽  
Combined Sewer Overflows ◽  
Efficient Removal ◽  
Pharmaceutical Residues ◽  
Combined Sewer

A study has been conducted on a retention soil filter (RSF) to test its effectiveness in removing pharmaceutical residues and microorganisms from combined sewer overflows (CSOs). Efficient removal of solids, nutrients and heavy metals has already been proven. The possibility that organic micropollutants and microorganisms are also retained by the use of RSFs has been identified, but data are lacking. Results obtained in this study, in which testing for removal by a RSF of numerous micropollutant substances was performed, are most promising. The pharmaceuticals diclofenac and ibuprofen are presented in detail as examples of such micropollutants. Both showed a reduction in positive samples of more than 55% as well as a significant reduction in median and maximum concentrations. For microorganisms such as Escherichia coli, coliphages and Giardia lamblia (cysts), an average reduction in concentrations by three logarithmic steps (99.9%) was achieved. These results add to the evidence that using a RSF in the advanced treatment of wastewater from CSOs reduces the exposure of watercourses to pharmaceutical residues and microbial contamination.

Effect of urban drainage on bioavailability of heavy metals in recipient

2007 ◽  
Vol 56 (9) ◽  
pp. 43-50 ◽  
Author(s):  
D. Kominkova ◽  
J. Nabelkova
Keyword(s):  
Heavy Metals ◽  
Fine Particles ◽  
Drainage System ◽  
Human Consumption ◽  
Urban Drainage ◽  
Combined Sewer Overflows ◽  
Potential Health ◽  
Potential Health Risk ◽  
Combined Sewer ◽  
Heavy Metals Bioavailability

Heavy metals comprise one of the most hazardous groups of pollutants entering the aquatic environment. Their behaviour and ecotoxicological effects are not well understood especially if they are occur as a mix of metals. Drawing on data from three Prague creeks, the paper illustrates changes in heavy metals bioavailability resulting from different environmental conditions and related differences in urban drainage types. Heavy metals in sediment from creeks impacted by stormwater drain discharges are more bioavailable and accumulate in organisms to higher concentrations than in organisms from creeks affected by combined sewer overflows. The results also show that bioassay levels of lead in fish from the creeks exceed acceptable concentrations for human consumption (EC 466/2001) and therefore represent a potential health risk for humans. The results demonstrate the importance of providing improved interception efficiency in the drainage system structures. In particular, a higher level of interception of fine particles is critical, because of their higher metal adsorption capacity than for coarser particles.

Distribution and Fate of Escherichia coli in Lake Michigan Following Contamination with Urban Stormwater and Combined Sewer Overflows

2007 ◽  
Vol 33 (3) ◽  
pp. 566 ◽  
Author(s):  
Sandra L. McLellan ◽  
Erika J. Hollis ◽  
Morgan M. Depas ◽  
Meredith Van Dyke ◽  
Josh Harris ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Lake Michigan ◽  
Combined Sewer Overflows ◽  
Urban Stormwater ◽  
Combined Sewer ◽  
Sewer Overflows

Settleable Solids in a Combined Sewer System – Measurement, Quantity, Characteristics

1992 ◽  
Vol 25 (8) ◽  
pp. 181-188 ◽  
Author(s):  
S. Michelbach ◽  
C. Wöhrle
Keyword(s):  
Heavy Metals ◽  
Settling Velocity ◽  
Organic Pollution ◽  
Stormwater Treatment ◽  
Organic Micropollutants ◽  
Sewer System ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Combined Sewer System ◽  
The Relationship

Sediment and transportation of mineral and organic pollution in combined sewer systems are not completely understood. For better understanding, samples of sediment, slime and urban runoff were taken from the combined sewer system of Bad Mergentheim. The sedimentation velocity of settleable solids was measured with a settling apparatus. Typical settling curves for sediment, slime and wastewater were compiled. Some of the samples were analysed for heavy metals and organic micropollutants. By this the relationship between settling velocity and the load of heavy metals can be shown. The gained data are of interest to size clarifier tanks for stormwater treatment.

Characterizing heavy metals in combined sewer overflows and its influence on microbial diversity

2018 ◽  
Vol 625 ◽  
pp. 1272-1282 ◽  
Author(s):  
Zuxin Xu ◽  
Jun Wu ◽  
Huaizheng Li ◽  
Yanbo Chen ◽  
Jin Xu ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Microbial Diversity ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Sewer Overflows

scholarly journals Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflows

2011 ◽  
Vol 59 (2) ◽  
pp. 85-94 ◽  
Author(s):  
Petra Hnaťuková
Keyword(s):  
Heavy Metals ◽  
Anthropogenic Pollution ◽  
Urban Streams ◽  
Residual Fraction ◽  
Combined Sewer Overflows ◽  
Metal Contents ◽  
Combined Sewer ◽  
Extraction Scheme ◽  
Sewer Overflows ◽  
The Impact

Geochemical distribution and mobility of heavy metals in sediments of urban streams affected by combined sewer overflowsThis study was undertaken to assess the impact of combined sewer overflows (CSOs) on distribution and potential mobility of heavy metals in sediments of urban streams in Prague, Czech Republic. Contents of total and extractable heavy metals (Cu, Zn, Pb, Cd, Cr and Ni), mineralogical phases and other sediment properties were measured in 44 surficial sediment samples. Total metal concentrations were obtained after microwave-assisted digestion whilst extractable metal contents were obtained following a sequential extraction scheme (acid soluble, reducible, oxidisable and residual fraction). The multivariate statistics of cluster analysis was used to identify specific areas of contamination and to evaluate the impact of CSOs. The observed mobility order of metals was Cd > Zn > Ni > Cu > Pb > Cr. There was a considerable increase in Zn mobility and increase of Cu associated with the oxidisable fraction in the sediments below CSO discharges. Cd was revealed as the most mobile heavy metal with percentages of extraction of approximately 40-60% in acid soluble fraction. Pb was mainly found in reducible fraction associated with Fe/Mn (oxi)hydroxides, which is indicative of anthropogenic pollution. In terms of environmental significance, Cd and Zn can be particularly mobile and bioavailable under acidic conditions, because they are predominantly bound in labile fractions. However, potential changes of redox state and pH may remobilize the metals bound to carbonates, reducible, and/or organic matter.

Distribution of Sedimentation Rates of Suspended Solids and Heavy Metals in Combined Sewer Overflows

1990 ◽  
Vol 22 (10-11) ◽  
pp. 61-68 ◽  
Author(s):  
Alfred P. Benoist ◽  
Lambertus Lijklema
Keyword(s):  
Heavy Metals ◽  
Suspended Solids ◽  
Discharge Rate ◽  
Fine Fraction ◽  
Sedimentation Rates ◽  
Combined Sewer Overflows ◽  
Quality Model ◽  
Combined Sewer ◽  
Sewer Overflows ◽  
Settling Rates

Measured absolute concentrations and the distributions of sedimentation rates (DSR's) of suspended solids (SS) and heavy metals in Combined Sewer Overflows (CSO's) show a strong variation between events. These variations can be explained partly by a relationship between the maximum discharge rate during an overflow and a) the concentrations of SS and the heavy metals Pb and Zn and b) the fraction of the DSR with high settling rates and the associated Pb concentrations. However, no unambiguous relationship between the DSR for the SS concentrations and the associated heavy metal concentrations has been detected. In contrast to the general experience a specific association of heavy metals with the fine fraction (low settling rates) in the SS of CSO's has not been found. The measured DSR's of SS and heavy metals have been used as input to a receiving water quality model. The simulated response is satisfactory, with regard to SS concentrations but not for heavy metals.

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