S-ZVI Particles were prepared by zero-valent iron and Na2S under anaerobic conditions,and the influence factors on the treatment of methylene blue wastewater were studied.The results show that the surface of S-ZVI is rough with a sulfide film and has a shell core structure.The methylene blue removal rate of S-ZVI particles firstly increased and then decreased with the increase of S/Fe ratio.When the S/Fe ratio was 0.025,the methylene blue removal effect was the best,the removal rate was 98.02％,and the overall reaction reached the adsorption equilibrium in 150 min,and it follows pseudo second order ki-netic reaction.The optimal pH of S-ZVI for methylene blue wastewater removal is between 6 and 8.The removal rate of methylene blue under aerobic condition is 1.46 times that of anaerobic condition.The presence of oxygen helps to improve the removal effect of S-ZVI on methylene blue.
关键词
硫化/亚甲基蓝/伪二级动力学/有氧反应/硫铁比
Key words
sulfide/methylene blue/pseudo second order kinetic reaction/aerobic reaction/sulfur-iron ratio
维普
万方数据