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环境化学  2015 

DOI:10.7524/j.issn.0254-6108.2014.04.020

Keywords: 电化学,废水处理,泡沫铜,气体扩散电极,活性艳红废水

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Abstract:

采用铜基泡沫材料作为阴极,并根据泡沫材料电阻小、强度高、孔隙多的特点设计气体扩散电极,开发了一套基于铜基泡沫材料的气体扩散电解废水处理方法.实验结果表明,该方法在电解电压仅为1.65V时,120min内原位生成14.29mg·L-1的H2O2.采用该系统对活性艳红废水进行降解,结果表明其在电解电压为2V时即可快速高效地降解活性艳红X-3B模拟染料废水,120min内模拟废水色度去除率达96.19%,色度被快速消除.UV-Vis与LC-TOFMS检测结果表明,降解过程中,萘环、三嗪结构及较稳定的苯环均被同步快速降解.该方法所需降解电压较低,只有2V,而普通电解方法通常需8—25V,能耗显著下降.这种低电压气体扩散电极电解不仅极大地抑制了水的无效电解,由于产生了·OH,还能维持相对高的有效氧化还原电位,高效降解污染物,是一种高效低耗的电化学水处理方法.

References

[1]  Oller I, Malato S, Sánchez-Pérez J A. Combination of advanced oxidation processes and biological treatments for wastewater decontamination-A review[J].Sci Total Environ, 2011, 409(20):4141-4166
[2]  Ayoub K, van Hullebusch E D, Cassir M, et al. Application of advanced oxidation processes for TNT removal: A review[J]. J Hazard Mater, 2010, 178(1/3):10-28
[3]  Ying D W, Peng J, Li K, et al. Dual-cell reduction and group effect in an internal microelectrolysis reactor[J]. Electrochim Acta, 2013, 89(0), 861-867
[4]  Jia J P, Yang J, Liao J, Wang W H, et al. Treatment of dyeing wastewater with ACF electrodes[J]. Water Res, 1999, 33(3):881-884
[5]  Chen X M, Chen G H, Gao F R, et al. High-Performance Ti/BDD Electrodes for Pollutant Oxidation[J]. Environ Sci Technol. 2003, 37 (21):5021-5026
[6]  熊方文, 余蜀灵. 脉冲电解处理工业污水技术[J]. 工业水处理, 1990 (02):11-13,17
[7]  Shen Z M, Yang J, Hu X f, et al. Dual electrodes oxidation of dye wastewater with gas diffusion cathode[J]. Environ Sci Technol, 2005, 39 (6):1819-1826
[8]  Reis R M, Beati A A G F, Rocha R S,et al. Use of gas diffusion electrode for the in situ generation of hydrogen peroxide in an electrochemical flow-by reactor[J]. Ind Eng Chem Res, 2011, 51(2):649-654
[9]  Kim J, Kim R, Kwon H. Preparation of copper foam with 3-dimensionally interconnected spherical pore network by electrodeposition[J]. Electrochem Commun, 2008, 10(8): 1148-1151
[10]  Yang B, Yu G, Huang J. Electrocatalytic hydrodechlorination of 2,4,5-trichlorobiphenyl on a palladium-modified nickel foam cathode[J]. Environ Sci Technol, 2007, 41(21): 7503-7508
[11]  Almajali M, Lafdi K, Prodhomme P H, et al. Mechanical properties of copper-coated carbon foams[J]. Carbon, 2010, 48(5):1604-1608
[12]  Banhart J. Manufacture, characterisation and application of cellular metals and metal foams[J]. Prog Mater Sci, 2001, 46(6):559-632
[13]  Lemos VA, Santos M S, Santos E S, et al. Application of polyurethane foam as a sorbent for trace metal pre-concentration-A review. Spectrochimica Acta Part B: At Spectrosc, 2007, 62(1): 4-12
[14]  黎华亮, 李忠, 夏启斌. 两种钛电极电生过氧化氢性能的比较[C]. 第六届中国功能材料及其应用学术会议, 中国湖北武汉, 2007, 38:4032-4035
[15]  Drogui P, Elamleh S, Rumeau M, et al. Hydrogen peroxide production by water electrolysis: application to disinfection[J]. J Appl Electrochem, 2001, 32(8):877-882
[16]  贺文静, 兰华春, 赵旭, 等. 活性炭纤维电极产生过氧化氢的影响因素与机制研究[J]. 环境科学学报, 2013 (03):725-729
[17]  Xu Y L, He Y, Jia J P, et al. Cu-TiO2/Ti dual rotating disk photocatalytic (PC) reactor: Dual Electrode degradation facilitated by spontaneous electron transfer[J]. Environ Sci Technol, 2009, 43(16): 6289-6294
[18]  Xu Y L, He Y, Cao X D, et al. TiO2/Ti rotating disk photoelectrocatalytic (PEC) reactor: A combination of highly effective thin-film PEC and conventional PEC processes on a single electrode[J]. Environ Sci Technol, 2008, 42(7): 2612-2617

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