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锑（Ⅲ）在合成性δ态-MnO₂表面的氧化机理

The oxidation mechanism of Sb(Ⅲ) on the surface of synthetic birnessite

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【Author】 HE Mengchang 1, JI Haibing 2, ZHAO Chengyi 2 \ (1.State Key Joint Laboratory of Environmental Simulation and Pollution Control, Institute of Environmental Sciences; 2.Analytical and Testing Center, Beijing Normal University, Beijing 100875)

【机构】北京师范大学环境科学研究所/环境模拟与污染控制国家重点联合实验室；北京师范大学分析测试中心；北京师范大学分析测试中心北京100875；北京100875；

【摘要】研究了锑 (Ⅲ )在合成性δ态二氧化锰表面之间发生的氧化反应动力学过程 ,当pH =5 .4时 ,锑 (Ⅲ )的吸附和氧化速率很快 .氧化产物锑 (Ⅴ )释放速度也很快 ,但还原产物Mn(Ⅱ )速度较慢 .pH对氧化作用影响很大 ,低pH值和离子强度有利于反应的进行更多还原

【Abstract】 The oxidation Kinetics antimony (Ⅲ) on the surface of synthetic birnessite was studied. The depletion of antimony (Ⅲ) from the solution at pH 5.4 was very rapid. Antimony (V) as the oxidation product was released quickly, while the release of manganese (Ⅱ) reduction product was slow. The pH was the main factor affecting the oxidation. Low pH and ion strength favored the oxidation reaction.更多还原