REVIEW PAPER
Change in Heavy Metals Concentrations
in Sediments Deposited in Retention Tanks
in a Stream after a Flood
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Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdańsk, Poland
Submission date: 2017-10-12
Final revision date: 2018-01-02
Acceptance date: 2018-01-02
Online publication date: 2018-08-01
Publication date: 2018-11-20
Corresponding author
Nicole Nawrot
Gdańsk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdańsk, Poland
Pol. J. Environ. Stud. 2019;28(1):9-14
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ABSTRACT
Our paper presents the results of heavy metal (HM) (Zn, Cu, Pb, Cd) content in bottom sediments
from retention tanks along Oliwa Stream in Gdańsk, Poland, before a flood (BF) and after a flood (AF)
14-15 July 2016. The flood had a huge impact on the quality of bottom sediments and their
displacement. The concentrations of HM differed significantly for research series conducted 3 months
BF and 8 months AF. The concentration of Cu increased from 3.5 mg/kg to 88.8 mg/kg BF and
from 12.1 mg/kg to 1,114.3 mg/kg AF, Zn from 27.4 mg/kg to 129.9 mg/kg BF; and 42.3 mg/kg to
244.8 mg/kg AF, Cd from 0.04 mg/kg to 0.47 mg/kg BF, and 0.08 mg/kg to 0.47 mg/kg AF. Also,
the migration of some metals, mostly Cu to retention tanks located downstream, was observed, resulting
from the washing away of sediments in the upper part of the stream. Since the stream inflows to the Gulf
of Gdansk, urban flooding created a risk of migration of contaminants to the Baltic Sea.