Perchlorate removal using granular activated carbon supported iron compounds: Synthesis, characterization and reactivity  

作　　者：Jianhong Xu Naiyun Gao Yulin Tang Yang Deng Minhao Sui 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Resue, Tongji University, Shanghai 200092, China [2]Jiangxi University of Science and Technology, Ganzhou 341000, China [3]Department of Earth and Environmental Studies, Montclair State University, Montclair, New Jersey 07043, USA

出　　处：《Journal of Environmental Sciences》2010年第11期1807-1813,共7页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50878163;50708067);the National Major Project of Science&Technology Ministry of China(No.2008ZX07421-002);the Research and Development Project of Ministry of Housing and Urban-Rural Development(No.2009K7-4)

摘　　要：Synthesis and use of the iron compounds supported on granular activated carbon （ICs/GAC） have shown significant environmental implications for perchlorate （ClO4^- ） removal. ICs/GAC was synthesized via hydrolyzing FeSO 4 ·7H2O on GAC, reduced by NaBH 4 solution in polyethylene glycol 6000 and ethanol solution, dried in vacuum condition and exposed to air. Synthesized ICs/GAC was characterized using transmission electron micrograph （TEM）, Brunauer-Emmett-Teller, X-ray photoelectron spectroscopy （XPS）. ICs/GAC was determined to be containing a large amount of FeOHSO 4 , Fe2O3 and a small amount of zero-valent iron （ZVI） nanoparticles according to TEM and XPS measurements. Batch static kinetic tests showed that 97% of ClO4^- was removed within 10 hr at 90°C and 86% of ClO4^- was removed within 12 hr at 25°C, at ICs/GAC dosage of 20 g/L. The experimental results also showed that FeOHSO 4 and Fe 2 O 3 nanoparticles have the function of perchlorate adsorption and play important roles in ClO4^- removal. The activation energy （E a ） was determined to be 9.56 kJ/mol.Synthesis and use of the iron compounds supported on granular activated carbon （ICs/GAC） have shown significant environmental implications for perchlorate （ClO4^- ） removal. ICs/GAC was synthesized via hydrolyzing FeSO 4 ·7H2O on GAC, reduced by NaBH 4 solution in polyethylene glycol 6000 and ethanol solution, dried in vacuum condition and exposed to air. Synthesized ICs/GAC was characterized using transmission electron micrograph （TEM）, Brunauer-Emmett-Teller, X-ray photoelectron spectroscopy （XPS）. ICs/GAC was determined to be containing a large amount of FeOHSO 4 , Fe2O3 and a small amount of zero-valent iron （ZVI） nanoparticles according to TEM and XPS measurements. Batch static kinetic tests showed that 97% of ClO4^- was removed within 10 hr at 90°C and 86% of ClO4^- was removed within 12 hr at 25°C, at ICs/GAC dosage of 20 g/L. The experimental results also showed that FeOHSO 4 and Fe 2 O 3 nanoparticles have the function of perchlorate adsorption and play important roles in ClO4^- removal. The activation energy （E a ） was determined to be 9.56 kJ/mol.

关 键 词：perchlorate removal ICs /GAC activation energy SYNTHESIS 

分 类 号：O614.33[理学—无机化学] TQ351.471[理学—化学]