响应面法优化Fenton法预处理腈纶废水
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摘要
为得到Fenton法预处理腈纶废水的最优条件参数,以初始pH、H_2O_2投加量、Fe~(2+)投加量、反应时间为考察因素,废水COD去除率为评价指标,在单因素实验基础上,通过Box-Behnken方案构建与拟合响应面模型,分析4个独立因素及各因素之间的交互作用对COD去除效果的影响。确定了最佳Fenton法预处理工艺:初始pH为3.0,H_2O_2投加量为5.0mL/L,Fe~(2+)投加量为4.9g/L,反应时间为150min时。此时,COD去除率预测结果为44.08%,实际运行结果为43.89%,表明该模型可靠。考察了无机离子对Fenton法预处理的影响,并研究预处理前后腈纶废水可生化性的变化。结果表明,SO~(2-)_4对腈纶废水的降解无明显影响,Fenton法预处理显著改善了腈纶废水可生化性。通过对比Fenton法预处理前后腈纶废水的傅立叶变换红外光谱(FTIR)可以得出,Fenton法预处理有效去除了腈纶废水中难降解有机物。
The purpose was to obtain optimal process parameters for the Fenton pretreatment of acrylic fibre wastewater.Based on the single factor test,the Box-Behnken response surface methodology was conducted for modeling and optimization.In this case,COD removal efficiency was selected as response values while the influent pH,H_2O_(2 )dosage,Fe~(2+)dosage and reaction time were considered as operational variables.Effects of the independent parameters and their interaction on COD removal efficiency were studied respectively.Furthermore,the optimum conditions of Fenton pretreatment were as follows:influent pH of 3.0,H_2O_(2 )dosage of 5.0mL/L,Fe~(2+)dosage of 4.9g/L and reaction time of 150min.Under such condition,the predictive value of regression model was 44.08%,while the removal efficiency of COD was 43.89%,implying this model was reliable.Effect of inorganic ions on Fenton reaction was studied,as well as the biodegradability of wastewater before and after pretreatment.The SO~(2-)_4had no obvious effect on degradation rate of actual wastewater by Fenton pretreatment.Under the optimum Fenton pretreatment conditions,the biodegradability of wastewater was significantly improved.By comparing the Fourier transform infrared spectroscopy(FTIR)before and after Fenton pretreatment,the refractory organic pollutants were proved effectively removed.
The purpose was to obtain optimal process parameters for the Fenton pretreatment of acrylic fibre wastewater.Based on the single factor test,the Box-Behnken response surface methodology was conducted for modeling and optimization.In this case,COD removal efficiency was selected as response values while the influent pH,H_2O_(2 )dosage,Fe~(2+)dosage and reaction time were considered as operational variables.Effects of the independent parameters and their interaction on COD removal efficiency were studied respectively.Furthermore,the optimum conditions of Fenton pretreatment were as follows:influent pH of 3.0,H_2O_(2 )dosage of 5.0mL/L,Fe~(2+)dosage of 4.9g/L and reaction time of 150min.Under such condition,the predictive value of regression model was 44.08%,while the removal efficiency of COD was 43.89%,implying this model was reliable.Effect of inorganic ions on Fenton reaction was studied,as well as the biodegradability of wastewater before and after pretreatment.The SO~(2-)_4had no obvious effect on degradation rate of actual wastewater by Fenton pretreatment.Under the optimum Fenton pretreatment conditions,the biodegradability of wastewater was significantly improved.By comparing the Fourier transform infrared spectroscopy(FTIR)before and after Fenton pretreatment,the refractory organic pollutants were proved effectively removed.
引文
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[18]郝海艳,王刚,徐敏,等.响应面法优化制备螯合絮凝剂巯基乙酰化聚丙烯酰胺[J].环境化学,2016,35(6):1269-1279.
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[20]HSUEH C L,HUANG Y H,WANG C C,et al.Degradation of azo dyes using low iron concentration of Fenton and Fenton-like system[J].Chemosphere,2005,58(10):1409-1414.
[21]王烨,蒋进元,周岳溪,等.Fenton法深度处理腈纶废水的特性[J].环境科学研究,2012,25(8):911-915.
[22]WALLING C.Fenton’s reagent revisited[J].Accounts of Chemical Research,1975,8(4):125-131.
[23]魏志勇.腈纶聚合单元废水处理实验研究[D].兰州:兰州交通大学,2014.
[24]翁诗甫.傅里叶变换红外光谱分析[M].2版.北京:化学工业出版社,2010.
[2]明爱玲,赵朝成.干法腈纶废水混凝处理研究[J].环境污染与防治,2010,32(7):62-65.
[3]王永杰,蒋进元,周岳溪,等.序批式生物膜法处理腈纶废水的试验研究[J].水处理技术,2012,38(1):93-95.
[4]沃原,吕晓磊,程寒飞,等.铁炭微电解―混凝沉淀―MBBR工艺处理腈纶废水[J].工业水处理,2011,31(7):74-77.
[5]李艳华,杨凤林,张捍民,等.内电解-Fenton氧化-膜生物反应器处理腈纶废水[J].中国环境科学,2008,28(3):220-224.
[6]崔晓宇,曾萍,田智勇,等.铁碳微电解法预处理湿法腈纶废水试验研究[J].环境工程技术学报,2014,4(3):187-191.
[7]WANG L Q,YANG Q,WANG D B,et al.Advanced landfill leachatetreatment using iron-carbon microelectrolysis-Fenton sprocess:process optimization and column experiments[J].Journal of Hazardous Materials,2016,318:460-467.
[8]ISHAK S,MALAKAHMAD A.Optimization of Fenton process for refinery wastewater biodegradability augmentation[J].Korean Journal of Chemical Engineering,2013,30(5):1083-1090.
[9]AMIRI A,SABOUR M R.Multi-response optimization of Fenton process for applicability assessment in landfill leachate treatment[J].Waste Management,2014,34(12):2528-2536.
[10]ZHANG Y F,WANG Y,ANGELIDAKIA I.Alternate switching between microbial fuel cell and microbial electrolysis cell operation as a new method to control H2O2level in Bioelectro-Fenton system[J].Journal of Power Sources,2015,219:108-116.
[11]PADOLEY K V,MUDLIAR S N,BANERJEE S K,et al.Fenton oxidation:apretreatment option for improved biological treatment of pyridine and 3-cyanopyridine plant wastewater[J].Chemical Engineering Journal,2011,166(1):1-9.
[12]FILLZ A,CATALKAYA,COKAY E,et al.A statistical experiment design approach for advanced oxidation of Direct Red azodye by photo-Fenton treatment[J].Journal of Hazardous Materials,2009,162(1):230-236.
[13]章琴琴,宋诚,华亚妮,等.Fenton法降解垃圾渗滤液中的溶解性有机质[J].环境工程学报,2017,11(4):2219-2226.
[14]马艳宁,刘晓亮,冯海军,等.制药废水处理工艺设计与运行实例[J].中国给水排水,2016,32(24):94-96.
[15]TAN I,HAMEED B H,AHMAD A L.Optimization of preparation conditions for activated carbons from coconut husk using response surface methodology[J].Chemical Engineering Journal,2008,137(3):462-470.
[16]SAEED M O,AZIZLIAB K,ISAAC M H,et al.Application of CCD in RSM to obtain optimize treatment of POME using Fenton oxidation process[J].Journal of Water Process Engineering,2015,8:e7-e16.
[17]GURAY G,ALTUNAY P,ABDURRAHMAN T.Electrochemical treatment of deproteinated whey wastewater and optimization of treatment conditions with response surface methodology technology for industrial wastewater treatment[J].Journal of Hazardous Materials,2008,157(1):69-78.
[18]郝海艳,王刚,徐敏,等.响应面法优化制备螯合絮凝剂巯基乙酰化聚丙烯酰胺[J].环境化学,2016,35(6):1269-1279.
[19]ZHANG H,CHOI H J,CANAZO,et al.Multivariate approach to the Fenton process for the treatment of landfill leachate[J].Journal of Hazardous Materials,2009,161(2/3):1306-1312.
[20]HSUEH C L,HUANG Y H,WANG C C,et al.Degradation of azo dyes using low iron concentration of Fenton and Fenton-like system[J].Chemosphere,2005,58(10):1409-1414.
[21]王烨,蒋进元,周岳溪,等.Fenton法深度处理腈纶废水的特性[J].环境科学研究,2012,25(8):911-915.
[22]WALLING C.Fenton’s reagent revisited[J].Accounts of Chemical Research,1975,8(4):125-131.
[23]魏志勇.腈纶聚合单元废水处理实验研究[D].兰州:兰州交通大学,2014.
[24]翁诗甫.傅里叶变换红外光谱分析[M].2版.北京:化学工业出版社,2010.