Decolorization mechanism of azo dyes enhanced by <i>Raoultella Planticola</i>/MoS<sub>2</sub> biohybrids

WEN Xian; HOU Yanan; LI Haibo; HAN Yi; ZHANG Daohong; SONG Yuanyuan; GUO Jianbo; LIU Zhihua; HUANG Cong

doi:10.13205/j.hjgc.202505008

Volume 43 Issue 5

May 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(5): 67-74

WEN Xian, HOU Yanan, LI Haibo, HAN Yi, ZHANG Daohong, SONG Yuanyuan, GUO Jianbo, LIU Zhihua, HUANG Cong. Decolorization mechanism of azo dyes enhanced by Raoultella Planticola/MoS2 biohybrids[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 67-74. doi: 10.13205/j.hjgc.202505008

Citation:

WEN Xian, HOU Yanan, LI Haibo, HAN Yi, ZHANG Daohong, SONG Yuanyuan, GUO Jianbo, LIU Zhihua, HUANG Cong. Decolorization mechanism of azo dyes enhanced by Raoultella Planticola/MoS₂ biohybrids[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 67-74. doi: 10.13205/j.hjgc.202505008

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Decolorization mechanism of azo dyes enhanced by Raoultella Planticola/MoS₂ biohybrids

doi: 10.13205/j.hjgc.202505008

1. Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin Chengjian University, Tianjin 300384, China;
2. Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China;
3. Taizhou University, Taizhou 318000, China

Received Date: 2024-03-08
Accepted Date: 2024-07-12
Rev Recd Date: 2024-05-21

Available Online: 2025-09-11

Abstract

Abstract

The biological decolorization of traditional azo dyes is usually limited by low electron transfer rates， which can be addressed by the addition of nanoparticles with redox-active properties to form a stable biohybrid system. A surface-precipitated R. planticola/MoS₂ biohybrid with good biocompatibility was constructed. Batch experiments showed that biohybrids incorporating 0.1-0.7 mmol/L molybdic sulfide （MoS₂） promoted the biological decolorization of methyl orange （MO），with R. planticola/MoS_{2（0.5mmol/L）} exhibiting the fastest decolorization efficiency. The R. planticola/MoS₂ biohybrid improved microbial metabolic activity and electron transfer capacity， as evidenced by a respective increase of 92.08%， 42.61%， 85.89%， and 37.58% in the levels of nicotinamide adenine dinucleotide （NADH）， adenosine triphosphate （ATP）， and electron transfer system activity （ETSA）. In addition， the R. planticola/MoS₂ biohybrid increased the content of extracellular polymeric substances（EPS） and promoted the expression of redox-active substances and functional groups. This study provided a novel strategy for accelerating the biodegradation of azo dyes and deepened the understanding of the interactions between nanomaterials and microorganisms.
- R. planticola/MoS₂,
- methyl orange,
- electron transfer,
- substance metabolism

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References(35)

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