[Construction and performance analysis of a microbial electrochemical sensor for monitoring heavy metals in water environment].
Sheng Wu Gong Cheng Xue Bao
; 38(5): 1903-1914, 2022 May 25.
Article
in Zh
| MEDLINE
| ID: mdl-35611737
ABSTRACT
A microbial fuel cell (MFC)-based microbial electrochemical sensor was developed for real-time on-line monitoring of heavy metals in water environment. The microbial electrochemical sensor was constructed with staggered flow distribution method to optimize the parameters such as external resistance value and external circulation rate. The inhibition of concentration of simulated heavy metal wastewater on voltage under optimal parameters was analyzed. The results showed that the best performance of MFC electrochemical sensor was achieved when the external resistance value was 130 Ω and the external circulation rate was 1.0 mL/min. In this case, the microbial electrochemical sensors were responsive to 1-10 mg/L Cu2+, 0.25-1.25 mg/L Cd2+, 0.25-1.25 mg/L Cr6+ and 0.25-1.00 mg/L Hg2+ within 60 minutes. The maximum rejection rates of the output voltage were 92.95%, 73.11%, 82.76% and 75.80%, respectively, and the linear correlation coefficients were all greater than 0.95. In addition, the microbial electrochemical sensor showed a good biological reproducibility. The good performance for detecting heavy metals by the newly developed microbial electrochemical sensor may facilitate the real-time on-line monitoring of heavy metals in water environment.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bioelectric Energy Sources
/
Metals, Heavy
Language:
Zh
Journal:
Sheng Wu Gong Cheng Xue Bao
Journal subject:
BIOTECNOLOGIA
Year:
2022
Document type:
Article
Affiliation country:
China