双硫腙/凹凸棒土复合固相萃取填料的制备及其对重金属离子吸附性能的研究

通过对凹凸棒土进行盐酸预处理、苯基三甲氧基硅烷表面改性和复合双硫腙,制备了复合固相萃取填料(DZ@ATP).采用扫描电子显微镜(SEM)、X射线能谱仪(EDS)、傅里叶变换红外光谱仪(FI-IR)、X射线光电子能谱仪(XPS)对其进行表征,确定了最佳固相萃取条件.考察了DZ@ATP对水中Cd2+,Co2+,Cu2+,Cr3+,Pb2+,Sb3+,Sn2+,Tl+,Zn2+,Tb3+,Ag+,Hg2+的吸附性能.吸附容量分别达到15.99,13.45,14.72,12.97,15.77,13.15,14.93,13.81,14.09,13.11,15.82,14.98 mg/g.通过固相萃取与电感耦合等离子体质谱仪(ICP-MS)联用测定了水样中重金属离子的含量,检出限分别为0.041,0.027,0.033,0.047,0.063,0.017,0.052,0.084,0.019,0.018,0.056,0.040μg/L.