Atomic Absorption Spectrophotometry for determination of Heavy Metals concentration in the Hornwort and water hyacinth plants growing in Tigris River
Keywords:heavy metals, Hornwort (Ceratophyllum demersum) , water hyacinth (Eichhornia crassipes).
The paper shows our findings on the acumulation of the 6 heavy metals (arsenic, cadmium, lead, chromium, cobalt and nickel) which absorped at two aquatic plants water Hyacinth (Eichhornia cruassipes) and Hornwort(Ceratophyllum demersum) , growing in the River Tigris, in Southeast Baghdad, Iraq. Laboratory testing has found that heavy metal hyper-accumulators are some aquatic plants. In assessing the scope of this on-site phenomena, an assessment of heavy metals (Cd, Pb, As, Ni, Cr and Co) content from water hyacinth (Eichhornia crassipes) and Hornwort (Ceratophyllum demersum) freely growing in around river Tigris, was done using atomic absorption spectrophotometry (AAS). The over mean concentration of heavy metals in E. crassipes samples was calculated as follows: As, 24.6±11.9, Cd, 6.70±2.55 , Pb, 47.9±14.8, Cr, 25.7±9.90, Ni, 26.8±12.8 and Co, 5.76±2.46 mg/kg. In C. demersum samples was, As, 70.3±16.2, Cd, 9.37±5.52, Pb, 44.9±13.4, Cr, 27.4±5.39Ni, 33.0±14.4 and Co, 14.2±7.32. The load of heavy metals adsorption in water hyacinth plants samples as the adsorpt surface increased in the order Co<Cd<As<Cr<Ni<Pb, and in Hornwort plants samples increased as follows Cd<Co<Cr<Ni<Pb<As. The concentrations of As, Cd, Pb, Cr, Ni and Co were upper permissible. The study closes with the monitoring of violations of Assay of Heavy Metals in of Hornwort (Ceratophyllum demersum) and water hyacinth (Eichhornia crassipes) Growing in Tigris River; all of the objectives of environmental sustainable development and river management.