Survey of the Concentration of Some Heavy Metals in Waste Waters from Ramnicu Valcea Chemical Plant at the Biological Purification Plant Their Impact Over the Natural Water Source, River Govora

摘要

Heavy metals are natural components of Earth's crust. They cannot be degraded or destroyed. The impurification of water surfaces with heavy metals usually has disastrous effects on the environment. That's why the determination of heavy metals concentrations at levels of ppm or ppb is strictly necessary. Industrial, economical and demographic development generaies huge amounts of wastes which have different chemical composition and variable content in toxic heavy metals. A defective management of these wastes leads to environment pollution and then to its degradation. This paper presents a method of determining these heavy metals and their levels in the waste waters from Rm.Valcea Chemical Platform at the "Biological Purification Plant". The following toxic heavy metals were determined: Cr, Zn, Fe,.Cu. The concentration of these metals was determined by atomic absorption spectrometry method (AAS) using an analyzer type A ANALYST 700. The final part of this paper presents the impact of these heavy metals on the natural water source the River Govora that is used as the recipient of the waste waters from the "Biological Purification Plant" administered by S. C. Oltchim Rm. Valcea.