Adsoroption Of Alkyl Glycosides On Soils And Its Application

Surfactant Enhanced Remediation(SER),soil organic pollution remediation technology,is currently the most promising organic contaminated soil remediation technology.Nowadays,the mostly used surfactants are Tween 80,SDS,OP-10,et al in SER,which are difficult to degrade in nature and may have soil formation of secondary pollution.APG as an environment-friendly green surfactant,a natural zero pollution,a readily biodegradable compound,is no secondary pollution of soil after the repair efficiency.That has excellent prospects in organic soil bioremediation APG has advantages will be green.In this paper,using artificial methods we study the elution effect of APG on Acetamiprid and further analysis of ionic strength,pH on elution effect.That provides a theoretical reference in application of organic contaminated soil remediation technology for APG.The study is that surfactant SDS,Tween 80,OP-10,APG in the adsorption of the soil used equilibration experimental,comparing the effect of different types of surfactant adsorption kinetics and features,and pH,ionic strength on the adsorption of the surfactant.Because soil structure is complex and the solid phase consists of organic matter and minerals,the study about surfactant adsorption on the mineral can well reveal the adsorption principle on the soil.Using batch equilibration experiments to study the APG adsorbed on Si02,Al2O3,Fe2O3,kaolinite,illite,montmorillonite and the soil,and fit the adsorption isotherm linear.The result show that SiO2 and Al2O3 adsorbed for APG meet the linear,Fe2O3,kaolinite,illite,montmorillonite and the soil adsorbed for APG meet Langmuir equation.The adsorption of APG is increased with Si:Al by comparing the data with the fitting element content.When the concentration of the solution to a certain extent,APG and OP-10 can penetrate into the interior of the soil,this effect can enhance its soil elution efficiency.The surfactant is adsorbed on the soil equilibrium with varies of time,anionic surfactant SDS(30-40min)and the three non-ionic surfactant Tween 80,OP-10,APG are required to reach adsorption equilibrium for 12 hours.High pH reduces the amount of adsorption on soils for anionic and non-ionic surfactants.High ionic strength is good for adsorption on soils for anionic and non-ionic surfactants.In terms of organic pollutants elution,the single largest elution rates of APG on Acetamiprid is 80%.The increasing of the organic matter content makes the washout rate of APG on the pesticides decline.The elution rate of APG on the pesticides were increased with increasing pH and decreased with the increasing ionic strength.