绿色合成纳米铁联用过氧化氢降解水中酸性大红的研究
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摘要
以葡萄籽提取液合成纳米铁粒子,将其与过氧化氢(H_2O_2)联用类芬顿法降解水中的酸性大红(AR)。考察了H_2O_2加入量、AR初始浓度、温度和pH对降解效果的影响。结果表明,AR降解率随AR初始浓度的降低,温度的升高,pH的降低而提高;在5～30 m L内,H_2O_2(10%)加入量20 m L时AR降解率最高。在pH值3～9,经反应180 min后,AR的降解率均可达到90%以上,说明pH值对AR降解的影响不显著。分别采用伪一级、伪二级、层间扩散模型对酸性大红降解的动力学行为进行描述,结果显示伪二级模型(R2=0. 998)对实验数据的拟合度最好,活化能为23. 7 k J/mol。
Green nanoscale iron particles were synthesized by using grape seed extract,and combined with H_2O_2 to degrade acid red( AR) by Fenton-like method from aqueous solution.The effects of H_2O_2 addition,initial concentration of AR,temperature and pH were investigated.The results showed that the AR degradation rate increased with the decrease of initial concentration of AR,the rise of temperature and the decrease of pH in the range of the research.The AR got the highest degradation rate with 20 m L H_2O_2( 10%) in the range of 5 ～ 30 m L.The degradation rate could reach more than 90% for 180 min in the pH range of 3 ～ 9,indicating that the effect of pH on AR degradation was insignificant.Pseudo-first-order kinetic model,pseudo-second-order kinetic model and intra-particular diffusion model were used to describe the kinetic behavior.The results showed that the second order kinetic model( R2= 0.998) had the best agreement with the experimental data,the activation energy is 23.7 k J/mol.
Green nanoscale iron particles were synthesized by using grape seed extract,and combined with H_2O_2 to degrade acid red( AR) by Fenton-like method from aqueous solution.The effects of H_2O_2 addition,initial concentration of AR,temperature and pH were investigated.The results showed that the AR degradation rate increased with the decrease of initial concentration of AR,the rise of temperature and the decrease of pH in the range of the research.The AR got the highest degradation rate with 20 m L H_2O_2( 10%) in the range of 5 ～ 30 m L.The degradation rate could reach more than 90% for 180 min in the pH range of 3 ～ 9,indicating that the effect of pH on AR degradation was insignificant.Pseudo-first-order kinetic model,pseudo-second-order kinetic model and intra-particular diffusion model were used to describe the kinetic behavior.The results showed that the second order kinetic model( R2= 0.998) had the best agreement with the experimental data,the activation energy is 23.7 k J/mol.
引文
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[14] Zhu F,Li L,Xing J. Selective adsorption behavior of Cd(II)ion imprinted polymers synthesized by microwave-assisted inverse emulsion polymerization:Adsorption performance and mechanism[J]. Journal of Hazardous Materials,2017,321:103-110.
[2] McMullan G,Meehan C,Conneely A,et al. Microbial decolourisation and degradation of textile dyes[J]. Applied Microbiology and Biotechnology,2001(56):81-87.
[3]董振,刘亮,郝艳,等.偶氮染料废水处理技术的研究进展[J].水处理技术,2017,43(4):6-10.
[4]肖惠群,顾早立,陶智伟,等. Fenton氧化法预处理并提高垃圾渗沥液可生化性的研究[J].环境科学学报,2015,35(12):3937-3942.
[5] Singh L,Rekha P,Chand S. Cu-impregnated zeolite Y as highly active and stable heterogeneous Fenton-like catalyst for degradation of Congo red dye[J]. Separation&Purification Technology,2016,170:321-336.
[6]欧阳琼,方战强.类芬顿催化剂研究进展[J].广东化工,2017,16:107-110.
[7]焦秀梅,习钰兰,曹占平,等. Fe_Ce负载型非均相类芬顿系统催化降解孔雀石绿的研究[J].天津城建大学学报,2014,20(3):186-193.
[8]高佳,李娜,方雪,等.铁酸锰纳米材料的制备及其对直接黑38的类芬顿催化降解研究[J].四川环境,2016,35(3):8-16.
[9] Hsueh C,Huang Y,Wang C,et al. Decolorization of an azo dye using low iron concentration of Fenton and Fenton-like system[J]. Chemosphere,2005,58(10):1409-1414.
[10]黄挺,张光明,张楠,等. Fe0类芬顿法深度处理制药废水[J].环境工程学报,2017,11(11):5892-5896.
[11]林正峰,陈艳,黄圣南.基于纳米零价铁的类芬顿体系降解土霉素的研究[J].环境工程,2017(11):35-40.
[12] Smuleac V,Varma R,Sikdar S,et al. Green synthesis of Fe and Fe/Pd bimetallic nanoparticles in membranes for reductive degradation of chlorinated organics[J]. Journal of Membrane Science,2011,379:131-137.
[13]刘清,张美,韩科昌,等.生物法合成纳米铁的研究进展[J].环境工程,2015(10):163-167.
[14] Zhu F,Li L,Xing J. Selective adsorption behavior of Cd(II)ion imprinted polymers synthesized by microwave-assisted inverse emulsion polymerization:Adsorption performance and mechanism[J]. Journal of Hazardous Materials,2017,321:103-110.