Study On Equilibrium Adsorption Of Phenol And Cd²⁺ By CTMAB Modified Be Ntonite

Industrial and agricultural production of sewage,waste gas,solid waste,pe sticides and other substances discharged into the soil,water,organic,heavy me tal pollutants have become more and more complex forms of environmental po llution.Organic modified soil.Study on heavy metals for activity to reduce the pollutant in the soil environment,avoid entering the food chain,and protect t he ecological environment and human health has very important significance an d application prospect.In this paper,CTMAB and BS-12 were used as homogenization materials to treat phenol and Cd²⁺,and CTMAB organic modified soil was used to stud y the adsorption of phenol and Cd²⁺.By using the method of batch processing on different homogenization ratio,temperature,pH and ionic strength conditio ns,phenol and heavy metal ions Cd²⁺ adsorption law of original bentonite,org anic bentonite and modified 50%CTMAB 150%CTMAB organic modified bento nite,and discussed the adsorption mechanism,the purpose is to provide theoret ical basis for the application of enhanced organic modified soils on the adsorpt ion of pollutants.The conclusions of this paper are as follows:Five kinds of uniform Cd²⁺treatment,CTMAB and BS-12 showed obviou s improvement,SDS effect is not obvious and 150 CT showed inhibitory effect,adsorption of EDTA and EGTA on Cd²⁺ adsorption in different substrates sho wed a significant inhibitory effect.Five kinds of uniform phenol treatment,CT MAB and BS-12 showed obvious improvement,SDS showed no obvious effect,EDTA and EGTA have improved effect on the adsorption of CK,but the ads orption of phenol on 50 CT and 150 CT on the promotion effect is not obvious.Finally,cationic surfactant CTMAB and amphoteric surfactant BS-12 were sel ected as the best homogenization materials.CTMAB and BS-12 homogenization is conducive to the promotion of phe nol adsorption on modified soils,using CK and 50 CT as adsorbent,the adsorpt ion of phenol increases with addition of homogeneous material proportion,butthe CTMAB is inhibited by homogenization of adsorption of phenol on 150 CT soil,while BS-12 homogenization no obvious effect on the adsorption of 150 CT on soil phenol.The isotherms of CK,50 CT and 150 CT for the homogeniz ation of phenol are suitable for the Henry model.CK,50 CT and 150 CT have a negative effect on the adsorption of phenol on homogenization,and the phys ical adsorption is dominant.pH is not conducive to phenol adsorption.Ionic st rength in the range of 0.05mol/L 0.1mol/L,adsorption of phenol on the adso rption of the substrate to promote the role,but in the range of 0.1mol/L 0.5mol/L has inhibitory effect.The presence of Cd²⁺ can inhibit the adsorption of phenol on the adsorption matrix.CTMAB homogenization method is conducive to promoting the adsorption of Cd²⁺,CK,50 CT and 150 CT as the adsorption matrix,the adsorption capac ity of Cd²⁺ increased with the increase of the proportion of homogenization ma terial.BS-12 uniform way conducive to promote the adsorption Cd²⁺,using CK and 50 CT as adsorbent,the adsorption amount of Cd²⁺ increased with the inc rease of added material proportion homogenization,homogenization method but BS-12 has an inhibitory effect on the adsorption of 150 CT on soil Cd²⁺.CK,50 CT,150CT adsorption isotherms for homogeneous Cd²⁺ are suitable for the Freundlich model.CK,50 CT and 150 CT have a positive effect on the temper ature of homogenization of Cd²⁺adsorption.pH increase is favorable for Cd²⁺adsorption.Ionic strength in the range of 0.05mol/L to 0.1mol/L,with the incr ease of ionic strength on the adsorption of the adsorption of the substrate to t he homogenization of Cd²⁺inhibition.The presence of phenol can promote the adsorption of Cd²⁺ on the adsorption of CTMAB,but inhibit the adsorption o f Cd²⁺ on BS-12.