Preparation of T-FMSAC and its catalytic ozonation performance on the removal of p-CBA in water
LU Si-ying, SUN Zhong-en, FENG Li, ZHANG Li-qiu
Beijing Key Lab for Source Control Technology of Water Pollution, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
Basing on the activated carbon prepared from sludge, different transition metals (Mn, Co, and Cu) doped ferromagnetic sludge-based activated carbons (T-FMSAC, T=Mn, Co, and Cu) were prepared by chemical coprecipitation method. The effects of metal species and doping ratio on the removal efficiency of p-chlorobenzoic acid (p-CBA) in water by T-FMSAC catalytic ozonation were investigated, and the optimal dosages of initial ozone and T-FMSAC catalyst were further determined. Experimental results showed that, after 40minutes of ozonation, Mn-FMSAC exhibited the highest catalytic activity under the initial ozone and catalyst dosage of 1mg/L and 40mg/L respectively, and the removal efficiency was 76%, higher than that for Co-FMSAC (72%) or Cu-FMSAC (65%). In addition, the removal efficiency of p-CBA decreased with the increase in the doping ratio from SAC:metal=100:1 to 10:1. With the doping ratio of 100:1, the T-FMSAC exhibited the optimal magnetic separation property and catalytic activity. The optimal condition for 100:1Mn-FMSAC catalytic ozonation was determined to be[O3]0=1mg/L and[FMSAC]0=40mg/L. Besides, the inhibition of p-CBA degradation by tertiary butyl alcohol (TBA) indicated that this process followed the hydroxyl radical reaction mechanism.
卢思颖, 孙中恩, 封莉, 张立秋. T-FMSAC制备及其催化臭氧氧化去除p-CBA效能研究[J]. 中国环境科学, 2017, 37(6): 2139-2144.
LU Si-ying, SUN Zhong-en, FENG Li, ZHANG Li-qiu. Preparation of T-FMSAC and its catalytic ozonation performance on the removal of p-CBA in water. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(6): 2139-2144.
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