Pollution Characteristics And Adsorption Of PAEs In Water And Sediments

Environmental hormones also called endocrine disruptors(EDCs),are a kind of chemicals present in the environment,which have become the world's major pollutants in the 21 st century.Phthalates(PAES)are a class of environmental hormones,mainly as plasticizers.In recent years,with the development of the plastics industry,PAEs are common in soil,surface water,atmospheric,industrial and domestic wastewater and solid wastes,and have been detected in drinking water,human body fluids and foods.At present,PAEs has become one of the world's major environmental organic pollutants,has aroused widespread concern around the world.In this paper,the content of dimethyl phthalate(DMP),diethyl phthalate(DEP),butyl benzyl phthalate(BBP),o-phenylene(DBP)in the Zaohe River and Bahe River water and sediment is analyzed.and analyze the Zaohe River,Bahe river sediment adsorption of DMP on adsorption kinetics,adsorption isothermsthe adsorption kinetics,and the effects of various factors on adsorption were analyzed.The results are as follows:(1)Analysis of Pollution Characteristics of PAEs in Rivers.(1)The concentration of ?PAEs in the zaohe water is 0.48-10.24 ug/L,and the concentration range of DBP is 0.004-1.83 ug/L.Based on the analysis of the percentage of various substances in water,DMP was the main pollutant.Compared with other parts of the river,the concentration of PAEs in the zaohe River in the middle level,the concentration of PAEs in water is relatively low.(2)The concentration of ?PAEs in the sediments of the Zao river is 6.7-14.6 ug/g.Bahe River Sediments in the concentration range of sigma 4PAEs is 3.8-14.3ug/g,the percentage of various substances through the analysis of the sediment,with DMP as the main pollutants.Compared with other parts of the river,the pollution concentration of PAEs zaohe River and Bahe river sediments is relatively high.(2)the kinetics of sediment on DMP.Three kinds of zaohe River and Bahe river sediment adsorption process under the initial concentration of DMP showed the characteristics of fast adsorption,slow balance,balance after 15 h.The adsorption behavior of DMP in the soap River and Bahe River Sediments of four kinds of quasi two stage dynamic equations in.(3)adsorption isotherms of sediments on DMP.The isothermal adsorption process of DMP soap River and Bahe river sediments were increased with the increase of equilibrium concentration of DMP,the adsorption capacity of the growth rate from fast to slow,finally reached the balance.Three Langmui isothermal adsorption equation with the adsorption behavior of the soap River and Bahe River Sediments on DMP.(4)analysis of influencing factors of adsorption.Set different values of p H,the equilibrium adsorption of soap River and Bahe river sediment adsorption of DMP decreases with the increase of p H value,the equilibrium amount of p H on the Bahe river sediment sorption DMP have little effect.The equilibrium adsorption capacity of two kinds of sediments on DMP increased with the initial concentration,but when the initial concentration of DMP increased to a certain value,the adsorption capacity would not change.