Sunday, July 26, 2009
P63
Using immobilized cells on sawdust for removing lead from wastewater
Minoo Tabatabaei, Jamshid Fooladi, and Gholamhossein Ebrahimipour. Biology, Alzahra university, Faculty of Biological Science, Sheikh Bahaei, Tehran, Iran
Industrial operation of the various industries result in creating wastes which contaminate the environment directly and indirectly in the form of toxic and polluting materials, by increasing the level of pollution in various ecosystems. The removal of heavy metals ions from wastewater has received a great attention in recent decade years for global awareness of the underlying detriment of heavy metals in the environment. One of these polluting elements is lead which contaminates the environment as a result of various industrial activities, causing severe poisoning in human beings and other living creatures. Application traditional treatment techniques need enormous cost and continuous input of chemicals, witch become uneconomical and cause further environment damage. There is a tendency to use biological method to purify lead waste pollutants since they are more economical than chemical methods.
In this research a lead-absorbing strain, Delftia sp., isolated from wastewater, was immobilized onto sawdust and investigated as potential biosorbent for the removal lead from aqueous solution. The metal removing capacity of sawdust immobilized biomass was tested in the continuous flow fixed-bed column and was found to be highly effective in removing lead from wastewater. Immobilization has enhanced the biosorption of lead as compared to free biomass.
The aim of this study is to develop a new and cheap technology for the removal lead pollutions from wastewater.
Key words: biosorption, immobilization, lead.
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