Page 1

3.5 3 2.5 2 1.5 Surface Flow

1 .5

septic tanks

0 .5 1 1.5

1.2m gravel

constructed wetland

layer of plastic foil

2

20-25cm

2.5 3

Cd, Cr, Cu, Ni, Pb

Fe, Zn, Cu, Hg

Typha Domingensis

Pb, Cu, Zn

Duckweed

Ca,P,Mg,K,Pb,Zn, Cu,Fe, Organic matter

Pensacula Bahia

4.5

Vetiveria Zizannoides

4

Myriophyllum Aquaticum

3.5

Zn, Cu, Pb, Ni, Cr, Cd irrigation

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3.5 2.5 1.5 1 0 1 2 3 4 3 2 .5 .5 Surface Flow 20-25cm constructed wetland 1.2m gravel layer of plastic foil septic tanks irrigation