Studies On The Removal Of Environmental Estrogen-Thiabendazole And Bisphenol AF By MWCNT

With Environmental hormones were more and more widely used in human life,Residues of environmental hormone caused serious harmfull to the environment.At the same time,they damage and dysfunction the human body of endocrine reproductive system,so they pose a threat to human health.This paper make carbon nanotubes as adsorbent to remove Thiabendazole(TBZ)/Bisphenol AF(BPAF)in environmental water,determine the best adsorption conditions,systematically studied the adsorption behavior and mechanism of adsorption.Research results is important for preventing the pollution TBZ/BPAF,and can control its safe use in human production and living.The results show that:1.We compared the carbon nanotubes on the adsorption effect of TBZ/BPAF.The results indicate that MWCNT-OH/MWCNT respectively has best effect on adsorption TBZ/BPAF.At room temperature,we used only 4 min,the removal rate achieved 99.58%and 99.58%respectively.Experiment is carried out the MWCNT-OH/MWCNT recycling,the results can reach more than 5 times,remain high adsorption rate.And we use ethano asl elution,elution rate can reach 84.6%/96.7%,it achieved good effect.2.The adsorption dynamics behavior of TBZ/BPAF on MWCNT-OH/MWCNT is researched.Experiment results indicate that dynamic data of TBZ/BPAF on MWCNT-OH/MWCNT has good fitting with the secondary reaction kinetics model,the dynamic data again fitted diffusion model.Results show that:the adsorption process of TBZ/BPAF is more complex,the adsorption process is controlled by membrane diffusion and ion diffusion.3.The adsorption of TBZ/BPAF on MWCNT-OH/MWCNT meeted the Langmuir adsorption isotherm.According to the adsorption thermodynamics parameters,the adsorption process is spontaneous exothermic reaction.Their average adsorption were 1.462 kJ-mol-1 and 0.130 kJ-mol-1,respectively.The data indicated that the process is physical adsorption.4.When pH is between 4-9,ionic strength and pH have no effect on the adsorption,added Pb2+,PO43-to adsorbed BPAF,it has no interference,and other ions adsorbed also has no interference.The mechanism of adsorption is likely to ?-? conjugate or hydrogen bonding interaction,it is not the effect of surface charge.This method is applied to the practical wastewater treatment,it has satisfactory results in removing two substances.The study showed that the carbon nanotubes has potential application value,and can be used for removing TBZ and BPAF in water.