(1. 昆明理工大學(xué) 環(huán)境科學(xué)與工程學(xué)院，昆明 650500；
2. 天津市水利科學(xué)研究院 水環(huán)境研究所，天津 300061)
摘 要: 采用脈沖電催化內(nèi)電解流化床技術(shù)同時(shí)去除浮選廢水中的Pb2+和苯胺黑藥，運(yùn)用序批試驗(yàn)和SEM、XPS等分析研究影響污染物去除的工藝條件、脈沖電催化效應(yīng)、Pb2+和苯胺黑藥的去除或降解機(jī)制。結(jié)果表明：當(dāng)pH為4、電流密度為20 mA/cm2、脈沖周期為2 s、停留時(shí)間為90 min時(shí)，Pb2+和苯胺黑藥的去除率分別為99.80%和78.83%，BOD5/CODCr值由0.15上升至0.41。該技術(shù)能較好地同時(shí)去除浮選廢水中的Pb2+和苯胺黑藥，顯著提高廢水的可生化性。Pb2+和苯胺黑藥的去除得益于脈沖電催化內(nèi)電解體系下的氧化還原反應(yīng)、電沉積和高聚合度鐵氫氧化物的絮凝沉淀作用等；苯胺黑藥在新生態(tài)Fe2+、[H]、H2O2、？OH等活性物質(zhì)的作用下先后脫除二硫代磷酸基、脫氨基、苯環(huán)開(kāi)環(huán)斷裂而被降解為有機(jī)小分子和無(wú)機(jī)物。
關(guān)鍵字: 浮選廢水；鉛；苯胺黑藥；脈沖電催化；內(nèi)電解；流化床
（1. Faculty of Environmental Science and Technology, Kunming University of Science and Technology,
Kunming 650500, China;
2. Institute of Environment and Water Research, Tianjin Hydraulic Science Research Institute, Tianjin 300061, China）
Abstract:Pulsed electro-catalytic internal micro-electrolysis fluidized bed (PEIMEF) was used for simultaneous removal of Pb2+ and dianilino dithiophosphoric acid (DDA) from flotation wastewater. Sequencing batch tests and SEM, XPS were conducted to investigate the process conditions, the effect of pulsed electro-catalytic and removal mechanism. The results show that the removal efficiency of Pb2+ and DDA are 99.80% and 78.83%, respectively, and BOD5/CODCr increases to 0.41 from 0.15 at pH of 4, current density of 20 mA/cm2, pulse time of 2 s and hydraulic retention time of 90 min. PEIMEF can removes Pb2+ and DDA well, and improve the biodegradability significantly. The removal of Pb2+ and DDA is due to the redox reaction, electro-deposition and flocculation precipitation of iron hydroxide of high degree of polymerization under the function of PEIMEF. The degradation of DDA to small organic molecule and inorganic substance may be attributed to the repture of dithiophosphate groups, deamination and ring opening of benzene ring successively by the catalytic redox of the generated active substances of Fe2+, [H], H2O2, ？OH.
Key words: flotation wastewater; lead; dianilino dithiophosphoric acid; pulsed electro-catalysis; internal micro- electrolysis; fluidized bed
