A Comparative Study for the Collection Efficiency of Different Nanofiber Membrane made of Different Polymer towards Several Metal Elements in Air
In this paper,six kinds of polymer membrane were developed,including polystyrene(PS),polyphenylene sulfide(PPS),acetic acid hormone(AC),acrylic(AR),polyacrylonitrile(PAN),Polyamide 6(PA6).The results of XRD showed that their crystalline types were different;the contact angle measurement results showed that PA6 and PAN were hydrophilic materials;PS,PPS,AC and AR were hydrophobic materials.After enriching the particulates containing heavy metals from air,the target metal ions were eluted by oscillation.Afterwards,nine kinds of heavy metal ions were detected by ICP-MS,which were chromium(Cr),manganese(Mn),Nickel(Ni),copper(Cu),cadmium(Cd),tin(Sn),lead(Pb),arsenic(As)and selenium(Se).The experiment results indicated that nanofiber membranes have trapping selectivity for heavy metal ions.The enrichment efficiency of PS and PA6 for Cr was higher than other elements,AR was better for Sn,comparing with other metals.The enrichment efficiency of PAN towards Cr and Sn ions was significantly higher than other metals.The trapping efficiency of PPS towards Pb was much higher than other ions.AC have superior adsorption effect for Pb,Cr,Ni,and the same effect for As and Se.The results showed that using nanofibers to trap heavy metals in air provided a new sampling method for the analysis of trace heavy metal,which is simple,rapid,sensitive and accurate.
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