Degradation of bisphenol A using a self-generated Fenton reagent in a water treatment system

doi:10.19965/j.cnki.iwt.2025-0202

Abstract

Abstract:

On the basis of microbial fuel cells, a carbon fiber brush electrode enriched with iron reducing bacteria was used as the biocathode to form a bioanode-biocathode fuel cell. Combined with carbon nanotubes and polytetrafluoroethylene modified carbon felt as the cathode electrolytic cell unit, a three-chamber self-generated Fenton reagent water treatment system was constructed. The microbial composition, in-situ production capacity of Fe²⁺ and H₂O₂, and the biodegradation and Fenton oxidation degradation performances of bisphenol A(BPA) in the system were investigated. The results indicated that Geobacter was the main electricity producing microorganism on the biological anode, and there were strong iron reducing microorganisms Comamonas and Acinetobacter present on the biological cathode. Under the optimized conditions of pH=4.5 in the biological cathode chamber, citric acid addition of 0.3 mmol/L, electrolytic cell unit voltage of 3.0 V, and aeration rate of 40 mL/min, the mass concentrations of Fe²⁺ and H₂O₂ produced by the system were 10 mg/L and 30 mg/L, respectively. The degradation rate of 5 mg/L BPA in synthetic wastewater by the biocathode was 31.0%. After further adding 5 mg/L of self-generated H₂O₂ from the system for Fenton oxidation, the total degradation rate of BPA by the system increased to 93.1%. In addition, the system also had a good explanatory effect on BPA in actual wastewater.

Key words: microbial fuel cell, biocathode, electrolytic cell, iron sludge recycling, bisphenol A

摘要：

在微生物燃料电池的基础上，采用富集铁还原菌的碳纤维刷电极作为生物阴极，构成生物阳极-生物阴极燃料电池，并结合碳纳米管和聚四氟乙烯改性碳毡作为阴极的电解池单元，构建三室自产Fenton试剂水处理系统。考察了该系统中微生物组成、Fe²⁺和H₂O₂的原位生产能力以及对双酚A（BPA）的生物降解与Fenton氧化降解性能。结果表明，Geobacter为生物阳极上主要的产电微生物，生物阴极存在具有较强铁还原功能的微生物Comamonas和Acinetobacter。在生物阴极室pH=4.5、柠檬酸添加量0.3 mmol/L、电解池单元电压3.0 V、曝气量40 mL/min的优化条件下，系统自产Fe²⁺和H₂O₂的质量浓度分别为10 mg/L和30 mg/L。生物阴极对合成废水中5 mg/L BPA的降解率为31.0%，进一步投加5 mg/L系统自产H₂O₂进行Fenton氧化后，系统对BPA的总降解率提升至93.1%。此外，系统对实际废水中的BPA也具有较好的降解效果。

关键词: 微生物燃料电池, 生物阴极, 电解池, 铁泥循环, 双酚A

CLC Number:

X703
O646.5

Peijian ZHANG, Sheng ZHANG, Changyong WU, Yougang XU, Yunian HU, Min XU. Degradation of bisphenol A using a self-generated Fenton reagent in a water treatment system[J]. Industrial Water Treatment, 2026, 46(2): 150-159.

张培健, 张胜, 吴昌永, 许有刚, 胡宇年, 徐敏. 自产Fenton试剂水处理系统降解双酚A的研究[J]. 工业水处理, 2026, 46(2): 150-159.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2025-0202

https://www.iwt.cn/EN/Y2026/V46/I2/150

Figures/Tables 13

Fig.1 Schematic diagram of the reaction apparatus（a） and photograph of the actual device（b）

Table 1 Composition of bioanode synthetic matrix

项目	试剂	混合前各组分溶液质量浓度/（g‧L^-1）
乙酸钠	乙酸钠（C₂H₃NaO₂）	1.00
缓冲溶液	二水合磷酸二氢钠（NaH₂PO₄‧2H₂O）	3.32
	十二水磷酸氢二钠（Na₂HPO₄‧12H₂O）	10.36
	氯化铵（NH₄Cl）	0.31
	氯化钾（KCl）	0.31
维生素溶液	叶酸（C₁₉H₁₉N₇O₆）	0.30
	烟酸（C₆H₅NO₂）	0.50
	维生素B₁（C₁₂H₁₇N₄OS⁺）	0.50
	对氨基苯甲酸（C₇H₇NO₂）	0.50
	维生素B₂（C₁₇H₂₀N₄O₆）	0.50
金属盐溶液	七水硫酸镁（MgSO₄‧7H₂O）	6.14
	硫酸锰（MnSO₄‧H₂O）	0.56
	氯化钠（NaCl）	1.00
	七水合硫酸亚铁（FeSO₄‧7H₂O）	0.10
	二水氯化钙（CaCl₂‧2H₂O）	0.10
	硫酸锌（ZnSO₄）	0.15
	五水硫酸铜（CuSO₄‧5H₂O）	0.01

Fig.2 Output voltage of the bioanode during the enrichment cultivation stage of electrogenic microorganisms

Fig.3 The variation in Fe²⁺ production with operating time after MFC startup （a）， and the change in output voltage with testing time after biocathode acclimation completion（b）

Fig.4 Microbial compositions at the genus level for the bioanode （a） and biocathode （b）

Fig.5 The morphology change of Fe³⁺ with pH

Fig.6 Mass concentration of Fe²⁺ in the cathode chamber under different pH conditions

Fig.7 Effect of citrate enhancement on Fe²⁺ regeneration by the biocathode

Fig.8 H₂O₂ production performances（a），cyclic voltammetry curves（b） and Nyquist curves（c），and SEM images of CF and CF-CNT electrodes（d）

Fig.9 The influence of voltage （a） and aeration rate （b） on the H₂O₂ production performance of Pt/CF-CNT electrolysis cell

Fig.10 The influence of citric acid concentration （a） and H₂O₂ concentration （b） on the degradation of BPA in the system

Fig.11 Recycling performance of iron sludge within the system

Fig.12 Degradation performance of the system for BPA in real wastewater

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