染料预负载树脂对Cu(Ⅱ)的吸附作用特性  

ADSORPTION OF Cu(Ⅱ) ON DYE-PRELOADED RESIN

作　　者：凌晨[1] 刘福强[1] 陈泰鹏[1] 龙超[1] 吴秋原[1] 李爱民[1] 

机构地区：[1]污染控制与资源化国家重点实验室,南京大学环境学院,南京210046

出　　处：《离子交换与吸附》2013年第1期1-8,共8页Ion Exchange and Adsorption

基　　金：国家自然科学基金(No.51078178)

摘　　要：通过预负载实验,研究了染料预负载超高交联吸附树脂NDA-150对Cu(Ⅱ)的作用特性。研究结果表明,NDA-150负载酸性蓝29的能力很强,但对Cu(Ⅱ)吸附极弱。预负载酸性蓝29显著提高了NDA-150对Cu(Ⅱ)的吸附能力,而且随染料负载量的增加,Cu(Ⅱ)的吸附量呈阶段性的线性增长,单位增长倍率先增后降呈现两个阶段。FT-IR和XPS的表征结果显示,固相上染料分子中磺酸基、氨基及羟基参与了对Cu(Ⅱ)的吸附,这为染料预负载增强了树脂对Cu(Ⅱ)的吸附亲和力提供了直接证据。通过Ca(Ⅱ)屏蔽位点实验,表明固相中染料分子主要为Cu(Ⅱ)的吸附提供离子交换位点,此外还提供部分螯合位点。由此可见,超高交联吸附树脂NDA-150有可能同时去除废水中染料及共存重金属离子。The influence of dye preloaded on the adsorption of Cu（II） with hypercrosslinked polymeric resin NDA-150 was studied. Acid Blue 29 preloaded markedly enhanced the adsorption capacity of Cu（II） on the resin. With the increase of preloading concentration, the adsorption capacity of Cu（II） presented a periodically linear growth, while the enhancement amount contributed by per mole AB （ER） increased first and decreased afterwards. Based on the experimental results of FT-IR and XPS, the adsorption of Cu（II） was improved by the interaction of Cu（II） with -SO3Na, -NH2, and -OH group in the adsorbed dye molecules. The inside enhancement mechanisms were also examined by performing sites pre-shielding experiment and the results demonstrated that interactions between Cu（II） and AB were composed of both ion exchange and coordination. NDA-15 resin can simultaneously remove dye and heavy metal ions from wastewater.

关 键 词：吸附 染料 预负载 Cu(Ⅱ) 超高交联吸附树脂 

分 类 号：O647.3[理学—物理化学]