Development of a photoelectrochemical sensor for monitoring algal biomass(Chlorella vulgaris)
- Development of a photoelectrochemical sensor for monitoring algal biomass(Chlorella vulgaris)
- Hyeon Jin Jeon; Yong-Keun Choi; 송경근; Sang Hyun Lee; Yung-Hun Yang; Hyungsup Kim; Sunghyun Kim; Rangarajulu Kumaran; 홍석원; Hyung Joo Kim
- Photoelectrochemical sensor; Algal biomass; Algae dection sensor; 2-Hydroxyl-1,4-naphthoquinone; Chlorella vulgaris
- Issue Date
- Sensors and actuators. B, Chemical
- VOL 185, 405-410
- tHerein, we present a novel photoelectrochemical sensor system for the rapid enumeration of algalbiomass. The photosynthesis-based reducing action of algal cells on the electrochemical mediator 2-hydroxyl-1,4-naphthoquinone (HNQ) was used as the basis of an amperometric sensor system. By usinga simple LED (Light-Emitting Diode) installed three-electrode cell, the mediator that was reduced by algalmetabolic activity was reoxidized at a platinum-working electrode and held at a positive potential. Inthe presence of CO2as an electron donor, and LED illumination as an energy source for the algal cells, thereoxidation current and its rate of increase were found to depend on the concentration of algal biomass.Regression analyses plotting the initial rate of current (μA min−1) against algal biomass concentrations(g L−1) produced a reasonable correlation coefficient (r2= 0.9938). The sensor system exhibited a highsensitivity to algal biomass at a concentration as low as 0.065 g L−1and a rapid response time, which ispromising for further applications of the sensor system in algal-related industries.
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