Metals Water Sediment   p-value Significant difference at level p= 0.05 p-value Significant difference at level p= 0.05 Ni(II)- sample 0.001600 Yes 0.022628 Yes Ni(II)- control 0.000155 Yes 0.002491 Yes Cr(III)- sample 0.000000232 Yes 0.002889 Yes Cr(III)- control 0.000583 Yes 0.195824 No Mn(II)- sample 0.00000976 Yes 0.135646 No Mn(II)- control 0.003188 Yes 0.006223 Yes Pb(II)- sample 0.00000281 Yes 0.001602 Yes Pb(II)- control 0.016249 Yes 0.274458 No Co(II)- sample 0.000000014 Yes 0.015519 Yes Co(II)- control - No 0.047616 No

Table 5: Statistical analysis for the comparison of treatment technique without and with co-precipitation procedure for heavy metals determination from water and sediment samples.