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采用液相Na BH4还原法,制备出淀粉负载纳米铁镍双金属(淀粉/ZVI-Ni)和淀粉负载纳米铁镍铜三金属复合材料(淀粉/ZVI-Ni-Cu),并采用XRD、SEM、BET、XRF等仪器对其性能进行表征;进而对比其与纳米零价铁(ZVI)、淀粉负载零价铁(淀粉/ZVI)对三氯乙烯和氯仿的降解效果及影响淀粉/ZVI-Ni-Cu降解氯代烃的因素.结果表明:通过双金属和三金属的掺杂,可有效提高复合材料对氯代烃的降解,其降解效能关系为:淀粉/ZVI-Ni-Cu>淀粉/ZVI-Ni/>淀粉/ZVI>ZVI.其中淀粉/ZVI-Ni-Cu三金属复合材料在48 h内可实现氯代烃的完全降解.由于淀粉载体的加入,使得纳米金属材料成功地负载在淀粉上,复合材料的抗氧化性增强了,降解效果也更稳定可靠.
The starch nano-Fe-Ni bimetallic (starch / ZVI-Ni) and starch-supported Nano Fe-Ni-Cu composite materials (starch / ZVI-Ni-Cu) were prepared by liquid Na BH4 reduction method. , BET, XRF and other instruments to characterize their performance; and then compared with its zero-valent iron (ZVI), starch-loaded zero-valent iron (starch / ZVI) on the degradation of trichlorethylene and chloroform and starch / ZVI-Ni -Cu to degrade chlorinated hydrocarbons.The results show that the degradation of chlorinated hydrocarbons can be effectively enhanced by the doping of bimetallic and trimetallics, the degradation efficiency of which is: starch / ZVI-Ni-Cu> starch / ZVI-Ni /> starch / ZVI> ZVI, in which the starch / ZVI-Ni-Cu trimetallic composites can completely degrade chlorinated hydrocarbons within 48 h. Due to the addition of starch carrier, the nano- Starch, the composite antioxidant increased, the degradation effect is more stable and reliable.