Sucrose-modified nanoscale zero-valent iron（SM-NZVI） was prepared with liquid phase reducing method, and characterized by transmission electron microscopy（TEM） and X-ray diffraction（XRD） for the shape and struct...Sucrose-modified nanoscale zero-valent iron（SM-NZVI） was prepared with liquid phase reducing method, and characterized by transmission electron microscopy（TEM） and X-ray diffraction（XRD） for the shape and structure The size of SM-NZVI particles was about 100--150 nm and they displayed better dispersity. The degradation of ni- trobenzene（NB） in water by SM-NZVI was carried out in batch experiments. The results indicate that the efficiency of NB reduction via SM-NZVI increased by 44.24% compared with that via NZV, I, and coexistent Ca2＋, Mg2＋, HCO3- and other ions showed little effect on NB reduction but negative influence on aniline（AN） production. Furthermore, the kinetic researches indicate that NB reduction with SM-NZVI could be described by pseudo first-order kinetic model at different initial pH values and iron dosage. The oxidation products of iron were mainly Fe304 and Fe203 with irregular shape.展开更多
基金Supported by the National Natural Science Foundation of China（No.41272256） and the Special Research of Public Welfare Industry of State Environmental Protection of China（Nos.2013A073, 201009009）.
文摘Sucrose-modified nanoscale zero-valent iron（SM-NZVI） was prepared with liquid phase reducing method, and characterized by transmission electron microscopy（TEM） and X-ray diffraction（XRD） for the shape and structure The size of SM-NZVI particles was about 100--150 nm and they displayed better dispersity. The degradation of ni- trobenzene（NB） in water by SM-NZVI was carried out in batch experiments. The results indicate that the efficiency of NB reduction via SM-NZVI increased by 44.24% compared with that via NZV, I, and coexistent Ca2＋, Mg2＋, HCO3- and other ions showed little effect on NB reduction but negative influence on aniline（AN） production. Furthermore, the kinetic researches indicate that NB reduction with SM-NZVI could be described by pseudo first-order kinetic model at different initial pH values and iron dosage. The oxidation products of iron were mainly Fe304 and Fe203 with irregular shape.
