煤基电极材料吸附性能优化处理氰化废水研究
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摘要
以碘吸附值为响应,采用JMP软件定制设计优化煤基电极材料吸附性能。重点研究了热解终温、升温速率及添加剂比例对其吸附性能的影响规律,确定了优化制备条件及技术参数,并将其应用到氰化废水的处理过程。研究表明:热解终温是影响煤基电极材料吸附性能的显著因素,预测模型相关系数R2=0.999 7,刻画最优热解终温900℃,升温速率5℃/min,添加剂比例(质量分数)为20%,碘吸附值的预测值401 mg/g与验证实验平均值408mg/g吻合较好。以优化后的煤基电极材料为阴阳极,采用三维电吸附体系处理氰化废水,废水中CNT,CN-,Cu,Zn,SCN-的去除率分别为76.21%,77.86%,78.93%,66.78%和77.54%,达到较好的吸附去除效果。煤基电极材料的优化制备可用于提高废水中有害离子的去除率。
The custom design of JMP software was used to explore the optimal adsorption performance of coal-based electrode materials in cyanide wastewater treatment systerm.Set the iodine adsorption value as response value,final temperature,heating rate and additive ratio were considered as parameters.The model was established to characterize the optimal parameters and verify the adsorption performance of coal-based electrode materials.The results show the final temperature of pyrolysis is the most significant factor and the correlation coefficient R2 of prediction model is 0.999 7.The coal-based materials are prepared with the optimal condition of pyrolysis final temperature 900 ℃,the heating rate 5 ℃/min,the addition ratio 20%.The predicted of iodine adsorption value is 401 mg/g,which is in good agreement with the average value of 408 mg/g in the validation experiments.Threedimensional electrosorption cyanide wastewater treatment system was conducted by using optimized coal-based electrode material as cathodic and anode,the removal rates of CNT,CN-,Cu,Zn,SCN-were 76.21%,77.86%,78.93%,66.78%,77.54% respectively,which achieved better processing results.Optimized preparation of coalbased electrode materials can be used to increase the removal rate of harmful ions in wastewater.
The custom design of JMP software was used to explore the optimal adsorption performance of coal-based electrode materials in cyanide wastewater treatment systerm.Set the iodine adsorption value as response value,final temperature,heating rate and additive ratio were considered as parameters.The model was established to characterize the optimal parameters and verify the adsorption performance of coal-based electrode materials.The results show the final temperature of pyrolysis is the most significant factor and the correlation coefficient R2 of prediction model is 0.999 7.The coal-based materials are prepared with the optimal condition of pyrolysis final temperature 900 ℃,the heating rate 5 ℃/min,the addition ratio 20%.The predicted of iodine adsorption value is 401 mg/g,which is in good agreement with the average value of 408 mg/g in the validation experiments.Threedimensional electrosorption cyanide wastewater treatment system was conducted by using optimized coal-based electrode material as cathodic and anode,the removal rates of CNT,CN-,Cu,Zn,SCN-were 76.21%,77.86%,78.93%,66.78%,77.54% respectively,which achieved better processing results.Optimized preparation of coalbased electrode materials can be used to increase the removal rate of harmful ions in wastewater.
引文
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[3]邱陆明,刘影,张宇,等.印染废水中极高质量浓度氰化物处理试验研究[J].黄金,2018(3):71-73.
[4]宋永辉,姚迪,张珊,等.三维电极处理氰化废水的研究[J].黄金科学技术,2017(5):116-121.
[5]FANG Qile,SHEN Yi,CHEN Baoliang.Synthesis,decoration and properties of three-dimensional graphenebased macrostructures[J].Chemical Engineering Journal,2015,264:753-771.
[6]SHENG Jie,MA Chang,MA Yuan,et al.Synthesis of microporous carbon nanofibers with high specific surface using tetraethyl orthosilicate template for supercapacitors[J].International Journal of Hydrogen Energy,2016,41(22):9383-9393.
[7]FERNNDEZ P,ARENILLAS A,CALVO E,et al.Carbon xerogels as electrochemical supercapacitors.Relation between impedance physicochemical parameters and electrochemical behaviour[J].Int J Hydrogen Energy,2012,37:10249-10255.
[8]CHANG Binbin,ZHANG Shouren,YIN Hang.Convenient and large-scale synthesis of nitrogen-rich hierarchical porous carbon spheres for supercapacitors and CO2capture[J].Applied Surface Science,2017,412:606-615.
[9]LIU Mengyue,NIU Jin,ZHANG Zhengping.Potassium compound-assistant synthesis of multi-heteroatom doped ultrathin porous carbon nanosheets for high performance supercapacitors[J].Nano Energy,2018,51:366-372.
[10]JCKELN N,SIMON P,GOGOTSI Y.Presser Increase in capacitance by subnanometer pores in carbon ACS[J].Energy Lett,2016,1(6):1262-1265.
[11]宋永辉,田慧,雷思明,等.电吸附处理氰化废水过程中外加电压的影响研究[J].稀有金属,2017(8):904-911.
[12]雷伟,汪圣毅,张涛,等.JMP定制实验设计优化胃癌患者PBMC分离方案[J].基因组学与应用生物学,2017,36(5):1749-1754.
[13]MA Hongzhou,YAN Chao,WANG Yaoning.Statistical analysis and optimization of recovering indium from jarositr residue with vacuum carbothermic reduction by response surface methodlogy(RSM)[J].Green Process Synth,2017,6:211-216.
[14]雷祥,江凌,张少华,等.JMP二次开发方法研究[J].Saftwear,2014,35(2):48-49.
[15]凌丽霞,赵俐娟,章日光.苯甲酸和苯甲醛热解机理的量子化学研究[J].化工学报,2009,60(5):1224-1230.
[16]李少华,张学斌,车德勇.松木屑与褐煤共气化TG-FT-IR实验研究[J].燃料化学学报,2014,42(2):181-186.
[17]XU Weichun,TOMITA Akrial.Effect of coal type on the flash pyrolysis of various coals[J].Fuel,1987,66(5):627-631.
[18]PENG Xiaowei,MA Xiaoqian,LIN Yousheng,et al.Copyrolysis between microalgae and textile dyeing sludge by TG-FTIR:Kinetics and products[J].Energy Conversion and Management,2015,100:391-402.
[19]WEN C Y,LEE E S,DUTTA S.Coal conversion technology[M].Bonwick:Addison-Wesley,1979.
[20]宋永辉,马巧娜,贺文晋,等.煤直接液化残渣热解过程气体产物的析出[J].光谱学与光谱分析,2016(7):2017-2021.