Abstract

This study focuses on the estimation of heavy metal concentrations in the protected environment of Al-Hoswah, Yemen, Aden. The heavy metals were of great importance in this study, such as cadmium (Cd), cobalt (Co), copper (Cu), iron (Fe), manganese (Mg), lead (Pb)and zinc(Zn). For this study, the samples of water reaching to Al-Hoswah protected environment and some other samples of soil, plants, such as grass, Sorghum bicolor (L.) moench , Azadirachta indica (L.) A.juss, Pithecellobium dulce (Roxb.) Benth, weed and grass were analyzed by the Atomic Spectrometer (AS), for the estimation of the heavy metals concentration in samples. The findings of the study revealed that the concentration of zinc, cobalt and lead in the treated wastewater which reached to Al-Hoswah protected environment are less than the allowed limit for irrigating the plants. Besides, the concentration of cadmium was in its maximum allowed limits, while the concentration of manganese slightly exceeded the allowed limit. Iron also exceeded the allowed concentration for irrigating the plants. It has been appeared that the soil content of the simple easy iron and zinc elements in depth of 25-50cm were greater than the critical limit of the element in the soil of agriculture, while the concentration of manganese element in depth was found at its lowest critical limit. But, the concentration of zinc, lead, cadmium and manganese in the studied plants was at the allowed limit. Furthermore, the concentration of cobalt in the samples of weed, grass, Neem tree and the Deiman tree was a little raising of the natural level. The concentration of iron was high in all the samples and less concentration was found in sorghum.