首页|Microbial desalination cell treated spent geothermal brine as a nutrient medium in hydroponic lettuce cultivation: Health risk assessment

Microbial desalination cell treated spent geothermal brine as a nutrient medium in hydroponic lettuce cultivation: Health risk assessment

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  • NETL
  • NSTL
  • Elsevier
The scarcity and contamination of freshwater resources are extremely critical issues today, and the expansion ofwater reuse has been considered as an option to decrease its impact. Therefore, the reuse of microbial desalination(MDC)-treated spent geothermal brine for agricultural purposes arises as a good solution to prevent watercontamination and provide sustainable water usage. In this study, the potential of treated spent geothermal waterfrom MDC system as a nutrient solution for the hydroponic cultivation of lettuce was evaluated. The effects ofdifferent water samples (Hoagland solution (R1) as a control, MDC-treated water (R2), 1:1, v/v mixture of MDCtreatedwater and Hoagland solution (R3), 4:1, v/v mixture of MDC-treated water and Hoagland solution (R4),and tap water (R5)) on lettuce growth were considered. The application of R3 and R4 samples for hydroponiclettuce cultivation was promising since the lettuce plants uptake sufficient nutrients for their growth and productivitywith low toxic metal concentrations. In addition, the chlorophyll-a, chlorophyll-b, and carotene contentsof lettuce were in the range of 1.045–2.391 mg/g, 0.761–1.986 mg/g, and 0.296–0.423 mg/g in differentwater samples, respectively. The content of chlorophyll-a was highest in R1 (2.391 mg/g), followed by R3 (2.371mg/g). Furthermore, the health risk assessment of heavy metal accumulations in the lettuce plants cultivated inthe various water samples was determined. Results showed that heavy metal exposure via lettuce consumption isunlikely to suffer noticeable adverse health problems with values below the permissible limit value.

Spent geothermal brineHydroponic systemLettuce cultivationMicrobial desalination cellHealth risk assessment

A.Y. Goren、D.N. Eskisoy、S. Genisoglu、H.E. Okten

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Izmir Institute of Technology, Department of Environmental Engineering, Izmir, Turkey

Izmir Institute of Technology, Department of Bioengineering, Izmir, Turkey

Izmir Institute of Technology, Department of Environmental Engineering, Izmir, Turkey||Environmental Development Application and Research Center, Izmir, Turkey

2024

10.1016/j.scitotenv.2023.167778

Science of the Total Environment

Science of the Total Environment

EISCI
ISSN：0048-9697
年,卷(期)：2024.907(Jan.10)
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