研究报告
张杰儒,朱兴华,王浩权,崔岱宗.nZVI@SiO2-NH2对合成染料脱色效果及其对大肠杆菌生物毒性研究[J].环境科学学报,2019,39(2):336-342
nZVI@SiO2-NH2对合成染料脱色效果及其对大肠杆菌生物毒性研究
- Decolorization of synthetic dyes by nZVI@SiO2-NH2 and its toxicity to E.coli.
- 基金项目：中央高校基本科研业务费专项资金项目（No.2572018BD04）
- 作者
- 单位
- 张杰儒
- 东北林业大学生命科学学院, 哈尔滨 150000
- 朱兴华
- 东北林业大学生命科学学院, 哈尔滨 150000
- 王浩权
- 东北林业大学生命科学学院, 哈尔滨 150000
- 崔岱宗
- 东北林业大学生命科学学院, 哈尔滨 150000
- 摘要：采用液相还原法并使用氨基修饰的二氧化硅合成包覆型的纳米零价铁（nZVI@SiO2-NH2），同时，采用XRD、FT-IR及TEM等多种方法对所制备的材料进行表征.TEM表征结果表明，nZVI@SiO2-NH2粒径分布在10~50 nm之间，壳层厚度为15 nm.XRD和FTIR分析表明，复合颗粒具有Fe0晶型结构的内核，表面SiO2壳层存在氨基化修饰.使用nZVI@SiO2-NH2和nZVI对各类染料进行脱色处理，结果表明，nZVI@SiO2-NH2对上述染料的脱色效果都优于nZVI，且nZVI@SiO2-NH2具有对染料进行连续脱色的能力.大肠杆菌的存活情况和细胞内酶LDH和SOD的活性变化表明，nZVI@SiO2-NH2对生物的毒性更小.
- Abstract：In this study, the novel core-shell amino-functionalized silica coated nanoscale zerovalent iron(nZVI@SiO2-NH2) particles were prepared by using the liquid phase reduction method. The synthesized materials were characterized with different methods such as TEM, FT-IR and XRD. The TEM image showed that the average grain diameter of nZVI@SiO2-NH2 was about 10 to 50 nm, and the thickness of the silica shell was approximately 15 nm. The XRD and the FTIR results revealed that the core of the synthesized materials was mainly composed of Fe0. Moreover, the silicon shell was modified by amino successfully. Both nZVI and nZVI@SiO2-NH2 nanoparticles(NPs) were used in dye decolorizion tests. The results showed that dye decolorization rate was significantly higher with the use of the nZVI@SiO2-NH2 NPs compared to that with the use of nZVI. Moreover, the nZVI@SiO2-NH2 NPs had the ability to decolorize repeated additions of dye. The survival rate of E. coli and the changes of the activities of LDH and SOD indicated that, compared with nZVI, nZVI@SiO2-NH2 NPs was less toxic to organisms.
摘要点击次数： 827 全文下载次数： 1074
