Abstract

EVALUATION OF HEAVY METALS WITH SOME PHYSIOCHEMICAL AND BIOLOGICAL PARAMETERS FOR GROUND WATER IN SOUTH OF NAJAF CITY, IRAQ

Ahmed J. Mohammed*

ABSTRACT

A study has been carried out on the quality of Groundwater (GW) in south of Najaf city were evaluated by determining Heavy metals (HMs),physiochemical and biological parameters of twenty different public GW on February 2015.This paper present an assessment of the levels of Heavy metals ; Co, Cr, Zn, Cd, Pb, Mn, Fe and Cu by using Atomic Absorption Spectrophotometry (AAS) , some physiochemical properties; hydrogen ion concentration (pH), Electrical conductivity (EC), Total dissolved solids (TDS), chemical oxygen demand (COD), Turbidity (Tur.), Salinity (Sal.), Cations ( Na+, K+), and biological parameters for ten different public GW of them; total choliform (T.C), total plate counts (T.P.C) and pseudomonas. This study shows great variations among the analyzed samples with respect to their physical, chemical and biological parameters. However, some values were higher the maximum permissible levels recommended by world health organization (WHO) drinking water standards. The harvests of metallic contents except Mn, Fe, Cu , Cr and Zn were higher then maximum permissible levels recommended by WHO drinking water standards. The investigations shows that the GW in the study area cannot using as drink water according to the result of HMs , physiochemical and biological properties and the water in the studied wells can be used for irrigational only.

Keywords: Heavy metals (HMs), Physiochemical and biological parameters , WHO, Groundwater ,Total plate count ,Total coliform, South of Najaf city.