Physico-chemical properties of sediment collected from the marine stream of Bayan Lepas, Penang, Malaysia.

Parameter	Untreated sediment
Color	Dark brown
Temperature (°C)	26–28
pH	6.0–8.0
Sand (%, w/w)	17.9 ± 3.2
Silt (%, w/w)	85.4 ± 4.0
Clay (%, w/w)	4.5 ± 2.7
Carbon content (%, w/w)	3.0 ± 1.6
Water content (%, w/w)	50.5 ± 2.7
Electrical conductivity (μS cm−1)	498 ± 6.11
Cr(vi) ions (mg kg−1)	390.3 ± 3.2
Cu(ii) ions (mg kg−1)	480.1 ± 3.3
Ni(ii) ions (mg kg−1)	180.5 ± 2.5