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Wplyw garbarni na środowisko wód gruntowych miasta Dhaka
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ISBN10: 6207819667
ISBN13: 9786207819669
Publisher: Wydawnictwo Nasza Wiedza
Published: May 27 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Polish
ISBN13: 9786207819669
Publisher: Wydawnictwo Nasza Wiedza
Published: May 27 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Polish
Dhaka jest jednym z najgęściej zaludnionych miast na świecie. Wzrost liczby mieszkańców miasta w polączeniu z nieplanowaną urbanizacją i industrializacją już wplynąl na środowisko naturalne obszaru miejskiego. Hazaribagh jest tak zaludnioną dzielnicą mieszkalną i przemyslową miasta, gdzie dziala okolo 185 garbarni przetwarzających codziennie 220 ton skór i zużywających od 40 do 50 litrów plynów na każdy kilogram skóry. Ścieki przemyslowe z Hazaribagh są odprowadzane na nisko polożone tereny i do kanalów, gdzie występują wysokie stężenia Na, Mg, Ca, NH4, Cl, SO4 oraz metali ciężkich, zwlaszcza Cr, Fe, S, Mn i Zn, związanych z dużą ilością substancji organicznych. Nadmierne stężenie Cr wykryto w wierzchniej warstwie gleby, a poniżej 3,0 m znacznie spada, natomiast Al, Fe, Mn, Zn, Ni i Cu występują w wysokich stężeniach do badanej glębokości 6 m. Chociaż nie stwierdzono zanieczyszczenia glębokich wód gruntowych, a rząd podjąl decyzję o przeniesieniu garbarni poza miasto, konieczna jest rekultywacja już zanieczyszczonej wierzchniej warstwy gleby i zanieczyszczonej wody rzeki oraz wdrożenie ustawy o ochronie środowiska i przepisów wykonawczych w celu zmniejszenia podatności na zanieczyszczenie wody.
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