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An internal circulation iron-carbon micro-electrolysis reactor for aniline wastewater treatment:Parameter optimization,degradation pathways and mechanism
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作者 Yanhe Han Han Xu +4 位作者 Lei Zhang Xuejiao Ma Yang Man Zhimin Su Jing Wang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第11期96-107,共12页
Aniline is a vital industrial raw material.However,highly-toxic aniline wastewater usually deteriorated effluent quality,posed a threat to human health and ecosystem safety.Therefore,this study reported a novel intern... Aniline is a vital industrial raw material.However,highly-toxic aniline wastewater usually deteriorated effluent quality,posed a threat to human health and ecosystem safety.Therefore,this study reported a novel internal circulation iron-carbon micro-electrolysis(ICE)reactor to treat aniline wastewater.The effects of reaction time,pH,aeration rate and iron-carbon(Fe/C)ratio on the removal rate of aniline and the chemical oxygen demand were investigated using single-factor experiments.This process exhibited high aniline degradation performance of approximately 99.86% under optimal operating conditions(reaction time=20 min,pH=3,aeration rate=0.5 m3·h^(-1),and Fe/C=1:2).Based on the experimental results,the response surface method was applied to optimize the aniline removal rate.The Box–Behnken method was used to obtain the interaction effects of three main factors.The result showed that the reaction time had a dominant effect on the removal rate of aniline.The highest aniline removal rate was obtained at pH of 2,aeration rate of 0.5 m^(3)·h^(-1)and reaction time of 30 min.Under optional experimental conditions,the aniline content of effluent was reduced to 3 mg·L^(-1)and the removal rate was as high as 98.24%,within the 95% confidence interval(97.84%-99.32%)of the predicted values.The solution was treated and the reaction intermediates were identified by high-performance liquid chromatography,ultraviolet-visible spectroscopy,Fourier-transform infrared spectroscopy,gas chromatography-mass spectrometry,and ion chromatography.The main intermediates were phenol,benzoquinone,and carboxylic acid.These were used to propose the potential mechanism of aniline degradation in the ICE reactor.The results obtained in this study provide optimized conditions for the treatment of industrial wastewater containing aniline and can strengthen the understanding of the degradation mechanism of iron-carbon micro-electrolysis. 展开更多
关键词 ANILINE iron-carbon micro-electrolysis Circulating fluidized bed Waste water DEGRADATION
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Nitrogen removal efficiency of iron-carbon micro-electrolysis system treating high nitrate nitrogen organic pharmaceutical wastewater 被引量:4
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作者 周健 段送华 +1 位作者 陈垚 胡斌 《Journal of Central South University》 SCIE EI CAS 2009年第S1期368-373,共6页
The nitrate nitrogen removal efficiency of iron-carbon micro-electrolysis system was discussed in treating pharmaceutical wastewater with high nitrogen and refractory organic concentration. The results show that the g... The nitrate nitrogen removal efficiency of iron-carbon micro-electrolysis system was discussed in treating pharmaceutical wastewater with high nitrogen and refractory organic concentration. The results show that the granularity of fillings,pH,volume ratios of iron-carbon and gas-water,and HRT. have significant effects on the nitrogen removal efficiency of iron-carbon micro-electrolysis system. The iron-carbon micro-electrolysis system has a good removal efficiency of pharmaceutical wastewater with high nitrogen and refractory organic concentration when the influent TN,NH4+-N,NO3--N and BOD5/CODCr are 823 mg/L,30 mg/L,793 mg/L and 0.1,respectively,at the granularity of iron and carbon 0.425 mm,pH 3,iron-carbon ratio 3,gas-water ratio 5,HRT 1.5 h,and the removal rates of TN,NH4+-N and NO3--N achieve 51.5%,70% and 50.94%,respectively. 展开更多
关键词 iron-carbon micro-electrolysis NITROGEN NITRATE NITROGEN REMOVAL efficiency REMOVAL rate
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Treatment of Wastewater from Pharmaceutical Intermittent Production by Fe/C-Fenton-Hydrolysis Acidification-A/O Process 被引量:1
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作者 Zhai Jian Jiang Chunhua +2 位作者 Wang Ya Zhang Jingjing Wang Yina 《Meteorological and Environmental Research》 CAS 2018年第1期71-74,82,共5页
The design and running effect of treatment of wastewater from pharmaceutical intermittent production by iron-carbon(Fe/C)-Fentonhydrolysis acidification-anoxic/aerobic(A/O)process were introduced.The results of co... The design and running effect of treatment of wastewater from pharmaceutical intermittent production by iron-carbon(Fe/C)-Fentonhydrolysis acidification-anoxic/aerobic(A/O)process were introduced.The results of continuous operation showed that when the flow rate of the influent wastewater was 300 m^3/d,after the influent high-concentration wastewater(CODCrand NH4+-N concentration were 35 000 and 1 000 mg/L,respectively)and medium-concentration wastewater(CODCrand NH4+-N concentration were 1 500 and 100 mg/L,respectively)were treated by the process,CODCrand NH4+-N concentration in the effluent decreased to 360-410 and 20-25 mg/L,respectively,and the quality of the effluent could meet the Grade III standard of Integrated Wastewater Discharge Standard(GB 8978-1996).The combined process was proved to be an effective method to treat wastewater from pharmaceutical intermittent production,and its operation was stable. 展开更多
关键词 iron-carbon micro-electrolysis Fenton reagent Hydrolysis acidification Anoxic/aerobic Wastewater from pharmaceutical intermittentproduction
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