Results of chemical analyses of soils taken from playgrounds in Temirtau
Martin BystrianskĂ˝ Institute of chemical technology Prague
Focus of the study
• Monitoring of influence of metalurgic plant ArcelorMittal on quality of the environment in Temirtau • Assumption: transmission of contamination through air – dust containing heavy metals and PCDD/F and dioxine-like PCBs • Soil samples of 6 playgrounds in Temirtau
Target contaminants • Heavy (toxic) metals: Hg, Pb, Cd, Cu, Cr, Zn, As Released to environment from metalurgic industry Toxic for human health, animals and plants • Polychlorinated dibenzodioxines, dibenzofuranes and dioxine-like polychlorinated biphenyles Emitted during fossil fuels (coal) burning Carcinogenic, bioaccumulative
Heavy metals toxicity • Mercury (Hg) – coal burning, chemical industry – high toxicity, affects nervous system, accumulates in biological matter and in sediments – Minamata (Japan) – 1950´s serious poisoning due to disposal of wastewater containing Hg, • Lead (Pb) – leaded petrol, high toxicity, affects blood cells and nervous system, Children are very sensitive on lead exposition
Heavy metals toxicity II • Cadmium (Cd): fertilizers, wastewaters, cigarettes – Very toxic, bioacumulative, carcinogenic, damages kidneys and bones – Itai-Itai: Japan, 1969, Cd poisoning • Arsenic (As): metalurgic plants, fossil fuels burning, carcinogenic, nervous poison (state AsIII+) • Chromium (Cr): metalurgic plants wastewater, toxic in state CrVI+ • Zinc (Zn): esential element for plants and animals, toxic for fish
Map of playgrounds
Pollution limits • Concentration of pollutants in samples were compared with RSL (Regional Screening Levels) – further exploration or removal of contamination shoul be carried out if RSL are exceeded. • Derived using exposure parameters and factors representing the maximum justifiable chronical exposure – based on the direct contact with target compounds. • RSL are derived from US EPA recommendation (2013)
Levels of pollution limits for playgrounds According to decree of the Czech Ministry of the environment Compound
CAS number
Playground [mg/kg]
Hg
7439-97-6
0,3
Pb
7439-92-1
50
Cd
7440-43-9
0,3
Cu
7440-50-8
45
Cr
18540-29-9
85
As
7440-66-6
10
Zn
7440-38-2
90
PCDD/F, dl-PCB
20 * Recommended value
Chemical analyses results Látka [mg/kg]
PG 1
PG 2
PG 3
PG 4
PG 5
PG 6
Hg
0,09
0,05
0,14
0,06
0,07
0,03
Pb
20,9
2410
77,9
19,0
27,2
13,9
Cd
0,4
0,3
0,5
0,2
0,2
0
Cu
19,1
17,9
22,2
16,4
17,6
13,9
Cr – total
24,5
19,2
31,2
19,6
21,0
21,0
As
0
0
0
0
0
0
Zn
112,3
129,3
156,8
72,3
95,4
60,2
PCDD/F, dl-PCB TEQ [ng/kg]
40
2,6
3,7
7,8
6,8
6,4
Conclusions • In some samples higher concentrations of heavy metals (lead and zinc) and PCDD/F were determined • These compounds are adsorbed on particulate matter (dust) • Recommendations: 1) not to ventilate on dusty season 2) water town streets 3) exhaust gas treatment • Continue with monitoring
• Thank you for your attention Martin Bystrianský, ICT Prague martin.bystriansky@vscht.cz
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