Title: Research on model for heavy metal ions adsorption by bio-film and its affecting factors
Abstract:Heavy metals are contaminations which damage to the entironment greatly. Bio-film method is an effective purify process for the removal of heavy metals from wastewater. In order to find the optimal op...Heavy metals are contaminations which damage to the entironment greatly. Bio-film method is an effective purify process for the removal of heavy metals from wastewater. In order to find the optimal operation condition for heavy metal ions removal by bio-film, the effects of some affecting factors included: pH value, temperature, adsorption time, quantity of bio-film, co-existed ions on the adsorption were investigated. It can be known from the results of the test that: the optimal operation condition for the adsorption of Cu2+ is: pH value is 6, temperature is about 30 ℃, adsorption time is 15 min, quantity of bio-film is 12 g, the adsorption rate can reach 65%;while, the optimal operation condition for the adsorption of Cr3+ is: pH value is 3 - 7, temperature is about 25 ℃, adsorption time is 5 min, quantity of bio-film is 10 g, the adsorption rate reachs 87%. The competitive adsorption between co-existed ions may give a great influence to Cu2+ of which the adsorption capacity is weak. There is no evidence shows that Cr3+ be affected by inhibitive action or accelerative action, thus, adsorption systems which adsorb Cu2+ only or adsorb Cr3+ only can be fitted by the classical adsorption model.Read More
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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