期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 53, 期 33, 页码 12911-12919出版社
AMER CHEMICAL SOC
DOI: 10.1021/ie501727a
关键词
-
资金
- National Natural Science Foundation of China [50478053]
- National Key Science and Technology Project for Water Environmental Pollution Control [2009ZX07212-001-02]
Exposure to antimony (Sb) and arsenic (As) through contaminated surface water poses a great threat to human health. In this work, Sb and As were removed simultaneously by electrocoagulation (EC) using Fe-Al electrodes. The effects of current density, pH, initial concentration, aeration intensity, and anions were investigated. A higher current density achieved better removal performance. The optimum pH range was 5.0-7.0. Sb and As removals were slower at higher initial concentrations. Preoxidation was beneficial to As removal, whereas anoxic conditions were more favorable for Sb removal. Nitrate and sulfate had little influence on the performance of the EC process, but significant inhibition was observed in phosphate-rich solutions. Scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) analysis demonstrated that adsorption onto iron and aluminum hydroxides/oxyhydroxides was the predominant mechanism involved in Sb and As removal. Finally, over 9996 of Sb and As were removed from a practical wastewater sample, indicating that EC using Fe-Al electrodes provides an alternative method for Sb and As removal.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据