الفهرس | Only 14 pages are availabe for public view |
Abstract The present study covers the area of water pollution with phenols which its presence in drinking water causes a carcinogenic effects and impair the drinking water an objectionable taste and odorous. Phenols may present in raw water due to the discharge of wastewater from coke distillation plants, paper factories, the. petrochemical industries and many other industries. Therefor the removal of phenol is very important to protect the human public health from these problems. Conventional water treatment processes have no appreciable effect on the removal of phenols. On the other hand, activated carbon adsorption process is found to be the most promising line of treatment for removal of phenols. The activated carbon has the ability of phenols removal to a certain limits which comply with the specifications of Ministry Of Health issued on 26-02-1995. The activated carbon was used in this study in both granular and powdered form. The obtained results showed that, the efficiency of removal of phenols on powdered activated carbon is improved by increasing the contact time, dose of carbon and mixing speed. IBut In case of granular activated carbon it was found that, adsorption of phenols (adsorbate) on granular activated carbon (adsorbent) is affected by various factors such as depth of carbon in colurrm, rate of filtration through colurrm and flow technique. • Maximum utilization of the capacity of granular activated carbon is achieved by increasing the depth of granular carbon at constant rate of filtration (the contact time). The study of the effect of flow techniques showed that, fixed column is more efficient than the fluidized column in removal of phenols, at. different carbon depths and rates of filtration. But, the double filtration technique is more efficient than single column techniques (fixed and fluidized). |