电极材料对双池电化学降解靛蓝废水的影响
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摘要
为探讨电极材料对双池电化学降解靛蓝废水的影响,选取不锈钢和石墨作为阴/阳极电极材料,分析FeCl_3和NaCl质量浓度、电解时间和电压对脱色率的影响。测量了在最佳脱色效率条件下COD和BOD值,评价废水可生化性。结果表明,采用阳极区单独对废水进行降解,阴/阳电极材料同为不锈钢时脱色效率最好,脱色率达到99.01%,COD去除率为63.40%,B/C值为2.7。极差分析表明,NaCl质量浓度对脱色影响最为显著;采用阴/阳极区同时进行降解,阴极电极为不锈钢、阳极电极为石墨时,脱色效率最佳,脱色率为98.71%,阳极废水COD去除率为57.41%,B/C值为2.7,阴极区废水COD去除率为88.81%,B/C值高达7.1。FeCl_3质量浓度对阴极废水脱色影响最为显著,电压对阳极区废水脱色影响更显著。
In order to investigate the effect of electrode materials on the electrochemical degradation of indigo wastewater by double cell, stainless steel and graphite are selected as the electrode materials, respectively. The orthogonal experiments are designed to explore the concentrations of FeCl_3 and NaCl,electrolysis time and voltage on decolorization rate. The decolorization efficiency and the effect of each factor are analyzed by means of mean and range, and the COD and BOD values are measured under the optimal decolorization efficiency to evaluate the biodegradability of wastewater. The results show that the wastewater is degraded in the anode zone with stainless steel as the cathode/anode electrode material, the decolorization efficiency is the best, reaching 99.01%, the COD removal rate is 63.40%, and the B/C value is 2.7. Range analysis shows that NaCl concentration has the most significant effect on decolorization. When the wastewater is degraded in both the cathode and anode zone at the same time,stainless steel as the cathode electrode and graphite as the anode electrode, the decolorization efficiency is the best, which is 98.71%. The COD removal rate of the anode wastewater is 57.41%, and the B/C value is 2.7, and the values for the cathode are 88.81% and 7.1, respectively. The range analysis indicates that FeCl_3 concentration has the most significant effect on the decolorization of cathode wastewater, while the effect of voltage on the decolorization of anode wastewater is more significant.
In order to investigate the effect of electrode materials on the electrochemical degradation of indigo wastewater by double cell, stainless steel and graphite are selected as the electrode materials, respectively. The orthogonal experiments are designed to explore the concentrations of FeCl_3 and NaCl,electrolysis time and voltage on decolorization rate. The decolorization efficiency and the effect of each factor are analyzed by means of mean and range, and the COD and BOD values are measured under the optimal decolorization efficiency to evaluate the biodegradability of wastewater. The results show that the wastewater is degraded in the anode zone with stainless steel as the cathode/anode electrode material, the decolorization efficiency is the best, reaching 99.01%, the COD removal rate is 63.40%, and the B/C value is 2.7. Range analysis shows that NaCl concentration has the most significant effect on decolorization. When the wastewater is degraded in both the cathode and anode zone at the same time,stainless steel as the cathode electrode and graphite as the anode electrode, the decolorization efficiency is the best, which is 98.71%. The COD removal rate of the anode wastewater is 57.41%, and the B/C value is 2.7, and the values for the cathode are 88.81% and 7.1, respectively. The range analysis indicates that FeCl_3 concentration has the most significant effect on the decolorization of cathode wastewater, while the effect of voltage on the decolorization of anode wastewater is more significant.
引文
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[2]高立新,王燕,张大全.电化学法处理印染废水[J].印染,2010,36(10):12-15.
[3]张峰,李文奇,冯传平,等.Ti/IrO2-Pt电极电化学降解酸性橙II染料废水研究[J].水处理技术,2011,37(08):77-80.
[4]朱应良,万金泉,马邕文,等.电化学协同过硫酸盐法氧化处理橙黄G染料废水[J].水处理技术,2016,42(8):48-51+56.
[5]宋诗稳,刘冉彤,王天孝,等.活性炭负载活性氧化铝电极电化学降解染料废水[J].延安大学学报(自然科学版),2018,37(1):54-58.
[6]胡必清,朱亚伟.印染废水的化学法处理研究进展[J].印染,2016,42(13):46-50.
[7]罗平,许杨晨,张辉.活性炭对印染废水的吸附性能[J].印染,2016,42(1):14-20.
[8]蒋霞,杨智迪,徐岗,等.印染废水的铁碳微电解预处理工艺[J].印染,2015,41(19):38-41.
[9]CHANG S.Anaerobic Membrane Bioreactors(AnMBR)for Wastewater Treatment[J].Advances in Chemical Engineering and Science,2014,04(1):56-61.
[10]IRFAN M,BUTT T,IMTIAZ N,et al.The removal of COD,TSSand colour of black liquor by coagulation-flocculation process at optimized p H,settling and dosing rate[J].Arabian Journal of Chemistry,2017,(10):2307-2318.
[11]胡维超.印染废水的酸化水解-电解絮凝-MBR处理工艺[J].印染,2006,32(13):27-30.
[12]史亚君,许佩瑶.电解法处理高浓度印染废水[J].印染,2005,31(20):27-29.
[13]张伟.导电金刚石复合电极的制备及其降解氯苯废水的研究[D].上海:上海应用技术大学,2016.
[14]DENNYS FERNáNDEZ,IRMA ROBLES,FRANCISCO J,et al.Novel arrangement for an electro-Fenton reactor that does not require addition of iron,acid and a final neutralization stage.Towards the development of a cost-effective technology for the treatment of wastewater[J].Chemosphere,2018,(199):251-255.
[15]刘晓成,魏建宏,周耀渝,等.修饰碳阴极电化学降解废水研究进展[J].当代化工,2018,47(3):625-627+631.
[16]许佩瑶,王淑娜,王德宏,等.高浓度印染废水的电解-内电解法复合处理[J].印染,2004,30(8):26-28.
[17]卢雅莉.吸附材料在废水处理中的应用研究[J].当代化工研究,2018(8):143-144.
[18]王辉.阴阳极室同时作用氧化降解酸性媒介漂兰B染料废水的研究[C].智能信息技术应用学会,2011:4.
[19]班福忱,王艳欣,戴美月,等.隔膜体系阴阳极共同作用电化学法降解水中的甲基橙[J].工业水处理,2018,38(2):18-21.
[20]姜亚玲.阴阳极同时作用电化学法降解染料废水试验研究[D].沈阳:沈阳建筑大学,2016.
[21]刘艳,左燕君.电化学法处理染料废水的脱色实验研究[J].环境与发展,2018,30(1):84-85.