本文關(guān)鍵詞： 人工濕地型微生物燃料電池 X-B 脫色 產(chǎn)電 濕地基質(zhì) 陰極面積　出處：《環(huán)境科學(xué)》2017年05期 　論文類型：期刊論文

【摘要】：本研究采用人工濕地型微生物燃料電池處理偶氮染料X-3B,實(shí)現(xiàn)降解偶氮染料同步產(chǎn)電的效果.為了構(gòu)建性能最優(yōu)的人工濕地型微生物燃料電池(CW-MFC)系統(tǒng),本研究主要從濕地基質(zhì)和陰極面積兩個(gè)方面研究系統(tǒng)構(gòu)型對(duì)去除X-3B同步產(chǎn)電的影響,提高系統(tǒng)性能.研究表明以粒徑10 mm、孔隙率30%的小石子作為濕地基質(zhì)構(gòu)造的CW-MFC系統(tǒng)微生物生物量最大,去除X-3B效果最好,脫色率高達(dá)92.70%,但其產(chǎn)電性能最差.較小的粒徑和孔隙率使底層微生物生物量增加,促進(jìn)X-3B的去除,但隨著濕地基質(zhì)粒徑和孔隙率的減小,導(dǎo)致陰陽極營養(yǎng)物質(zhì)不足,系統(tǒng)傳質(zhì)阻力增加,抑制了系統(tǒng)產(chǎn)電性能.X-3B的去除效果隨著陰極面積的增加而提高直到陰極面積為594 cm~2時(shí)取得最大脫色率99.41%.當(dāng)陰極面積繼續(xù)增加時(shí),CW-MFC系統(tǒng)產(chǎn)電性能上升趨勢(shì)趨于平緩,X-3B去除效果呈現(xiàn)下降趨勢(shì),這是因?yàn)殛帢O反應(yīng)過快導(dǎo)致更多的陽極電子輸送到陰極用于產(chǎn)生電流,與X-3B發(fā)生反應(yīng)的電子減少,陽極成為提高CW-MFC系統(tǒng)性能的限制因素.
[Abstract]:In this study, an artificial wetland microbial fuel cell was used to treat azo dye X-3B in order to produce electricity synchronously. In order to construct a CW-MFCsystem with optimal performance, an artificial wetland microbial fuel cell system was developed. In this study, the effects of system configuration on the removal of X-3B synchronous power generation were studied from two aspects of wetland substrate and cathode area. The results showed that the CW-MFC system with 10mm diameter and 30% porosity as the wetland substrate had the largest microbial biomass and the best removal efficiency was X-3B. The decolorization rate is up to 92.70%, but its electrical performance is the worst. The smaller particle size and porosity increase the biomass of the bottom microorganism and promote the removal of X-3B, but with the decrease of the particle size and porosity of the wetland matrix, there is a shortage of nutrients in the anode and cathode. System mass transfer resistance increases, With the increase of cathode area, the removal efficiency of the system. X-3B increases with the increase of cathode area until the maximum decolorization rate of 99.41% is obtained at 594 cm ~ 2:00. When the cathode area continues to increase, the rising trend of the electrical performance of CW-MFC system tends to be gentle. The removal efficiency of X-3B decreased, This is because the rapid cathodic reaction leads to more anode electrons being transported to the cathode to generate current, and the number of electrons reacting with X-3B decreases. The anode becomes the limiting factor to improve the performance of CW-MFC system.
【作者單位】： 東南大學(xué)能源與環(huán)境學(xué)院;
【基金】：國家水體污染控制與治理科技重大專項(xiàng)(2012ZX07101-005) 國家自然科學(xué)基金項(xiàng)目(21277024)
【分類號(hào)】：TM911.45;X788
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本文編號(hào)：1538466