载钯螯合树脂的制备、表征及其降解多溴联苯醚的初步研究

Preparation and characterization of palladium-loaded chelating resins and their property on PBDEs debromination

以聚丙烯醛-异烟酰腙螯合树脂为高分子载体,利用其活性基团对钯的选择性富集分离性能,将金属元素钯键合到高分子载体上,制备一种含钯树脂材料(树脂1),并进一步原位还原得到还原态的载钯树脂(树脂2)。利用红外光谱、扫描电镜和X射线衍射等对以上2种含钯树脂材料进行了分析表征,并考察了它们对持久性有机污染物(POPs)多溴联苯醚(PBDEs)的脱溴降解性能。结果表明,2种树脂对BDE209均有降解活性,其中树脂1的降解性能比树脂2的降解性能要高,树脂中钯的氧化形态可能对BDE209的催化降解起主要作用。

With polyacrolein-isonicotinic acid hydrazone resin as functional polymer support, a chelating resin catalyst containing palladium （Resin Ⅰ） has been prepared by selective chemical bonding of its functional groups with noble metals. The resin is then further transformed to its reductive form （ Resin Ⅱ） through the in-situ reduction reaction of KBH4 on the polymer. The two palladium-loaded resins are characterized by SEM, IR spectra, X-ray diffraction and TG/DTG analysis. Their degradation properties for the debromination of polybrominated diphenyl ethers （PBDEs） are then investigated.