Title: Adsorption and its mechanism of anionic surfactant in wastewater by fly ash
Abstract: Fly ash can be used for the removal of anionic surfactant from wastewater.Adsorption of sodium dodecyl sulfate(SDS) in synthetic wastewater has been investigated.The effect of key factors including dosage of the fly ash,adsorption time and pH on SDS removal efficiencies were evaluated.The optimum conditions and the corresponding removal efficiency were determined.The adsorption mechanism was also furtherly studied.The results show that the SDS removal efficiency is increased firstly and steady subsequently with the increase of fly ash dosage,increased firstly and decreased subsquently with the increase of adsorption time,and decreased firstly and increased subsequently with the increase of pH value.The SDS removal efficiency can up to 83.3% when 70g fly ash added in 200mL wastewater containing SDS(50mg/L) when the pH value was adjusted to 13 at the adsorption time of 20 min.The adsorption of fly ash on SDS accords with Freundlich adsorption isotherm.This study can provide a scientific basis for anionic surfactant from wastewater by fly ash.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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