Decoloration of Direct Fast Black G in aqueous solution using supported nanoscale zero-valent iron p

• 作 者: Zheng-xian Chen Xiao-ying Jin Xin-wen Liu Zu-liang Chen
• 机 构: School of Chemistry and Material Sciences, Fujian Normal University, Fuzhou 350007, Fujian Province,
• 出 处: 第七届全国环境催化与环境材料学术会议
• 发表日期: 2011年4期
• 关键词: nanoscale zero-valent iron calcinated Kaolin supported Direct Fast Black G decol

　　In this issue, the calcinated Kaolin supported nanoscale zero-valent iron particles (K-nZVI) were synthesized and were used to decolorate the tetrad azo-groups dye Direct Fast Black G (DFBG).The result shows that 78.60 % of DFBG was depreciated when using K-nZVI, but only 41.39 % using nZVI alone and 12.56 % for calcinated Kaolin after reacting for 10 ain with an initial concentration of DBG 100 mg/L (pH=9.49).UV-vis demonstrated that the peak in the visible light region of DFBG was degraded.Kinetics studies show that the degradation of DFBG fitted well to the pseudo first-order model.Finally, the deeoloration rate of DFBG was 99.84 % from actual wastewater when employing K-nZVI after 60 min.