纳米Fe_3O_4强化PAC混凝沉淀处理印染废水
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摘要
采用FeCl_3·6H_2O及硫酸亚铁铵制备纳米Fe_3O_4,并将其应用于强化PAC混凝沉淀处理印染废水,结果显示所制备的纳米Fe_3O_4对PAC处理印染废水的效果有着明显的增强作用,以PAC及纳米Fe_3O_4的投加浓度分别为2.5 g/L及2.0 g/L条件下所制备的复合混凝剂在废水初始pH值为6.5,搅拌速度300 r/min,反应时间为20 min时,其COD及色度的去除率可达54.09%及90.72%。
Using FeCl_3·6 H_2O and ammonium ferrous sulfate to prepare the nano Fe_3O_4 which is used to strength the treatment effect on dyeing wastewater by aluminium polychlorid(PAC), the results show that it had obvious enhancement effect on the treatment,the COD and chroma removal rate reached to54.09% and 90.72% under the condition as follows:the PAC is 2.5 g/L and the nano Fe_3O_4 is 2.0 g/L(for prepared the complex coagulant),the pH value is 6.5,the speed is 300 r/min and the reaction time is 20 min.The vemoval rate of COD and chroma can reach 54.09% and 90.72%.
Using FeCl_3·6 H_2O and ammonium ferrous sulfate to prepare the nano Fe_3O_4 which is used to strength the treatment effect on dyeing wastewater by aluminium polychlorid(PAC), the results show that it had obvious enhancement effect on the treatment,the COD and chroma removal rate reached to54.09% and 90.72% under the condition as follows:the PAC is 2.5 g/L and the nano Fe_3O_4 is 2.0 g/L(for prepared the complex coagulant),the pH value is 6.5,the speed is 300 r/min and the reaction time is 20 min.The vemoval rate of COD and chroma can reach 54.09% and 90.72%.
引文
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[2] GAN Baohong,WU Zhongbiao,XU Genliang.Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment[J].Journal of Zhejiang University Science,2004,5(4):441-449.
[3] 薛懂,李长波,张洪林,等.絮凝-Fenton试剂氧化处理印染废水[J].环境工程学报,2014(9):3601-3606.
[4] 宋梦琪,周春江,马鲁铭.水解酸化工艺处理印染废水的机理[J].环境工程学报,2015(1):102-106.
[5] 范俊.基于新型磁性离子交换树脂的印染废水深度处理技术研究[D].南京:南京大学,2014.
[6] 刘忠煌.纳米四氧化三铁的制备及其对含酚废水的处理[D].合肥:合肥工业大学,2010.
[7] 王恒志,吴东辉,李建华.Fe3O4超细粉体的制备[J].江苏化工,2001(5):28-30.
[8] 周长波.PAC-生物联合絮凝除磷效能及机理分析[D].武汉:华中科技大学,2013.
[9] 姜翠玉,李亮,魏清,等.Fe3O4磁性纳米粒子的助凝性能及机理分析[J].石油学报(石油加工),2013(6):1047-1053.
[10] 彭贤玉,杨春平,董君英,等.Fenton-混凝沉淀法处理焦化废水的研究[J].环境科学与技术,2006(10):72-74,119.
[11] GAO B Y,CHU Y B,YUE Q Y,et al.Characterization and coagulation of a polyaluminum chloride (PAC) coagulant with high Al13 content[J].Journal of Environmental Management,2005,76(2):143-147.
[12] 高宝玉,王燕,岳钦艳,等.聚合铝基复合絮凝剂的电荷特性及絮凝作用[J].环境科学,2003(1):103-106.