Combined adsorbent best (chemical and natural) coagulation process for removing some heavy metals from wastewater

Increasing industrialization and extensive use of chemicals by the wide range of human sources of heavy metals contribute to increased impact on environment and human health. The excess concentration of heavy metals causes problems of toxicity and growth inhibition of living things. This research has two parts: first, the optimum dose of chemical coagulants (Fe 2 So 4 , Fe 2 So 3 , Al 2 So 3 and natural coagulant ( Moringa Oleifera seed)) was investigated, also study adsorption with / without coagulant. The natural coagulant ( Moringa Oleifera seed) and mixture with carbonized Moringa Oleifera and chemical adsorbent (lead + cadmium) were used in batch reactor in different operation conditions. As shown from the result, this method is successful for removing lead more than cadmium due to the characteristics of metals, and also the adsorption with coagulant has the best results than without coagulant. When using Moringa Oleifera as adsorbent and coagulant for lead removal, the adsorbent dose for the best operation condition is 0.45 mg, pH 7, lead concentration 0.5 mg at normal temperature. But when using Moringa Oleifera as adsorbent only, adsorbent dose for the operation conditions is 1 mg, pH 7, lead concentration 0.25 mg at normal temperature.