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http://dx.doi.org/10.5389/KSAE.2015.57.4.021

Safety Evaluation of a Wastewater Reuse for the Farmland Irrigation in Jeju Island  

Son, Yeong Kwon (Department of Environmental and Occupational Health Science, Rutgers University)
Rhee, Han-Pil (ETWATERS Inc.)
Kim, Haedo (Rural Research Institute, Korea Rural Community Corporation)
Choi, Sun Wha (Rural Research Institute, Korea Rural Community Corporation)
Kim, Jeong Dae (Rural Research Institute, Korea Rural Community Corporation)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.57, no.4, 2015 , pp. 21-29 More about this Journal
Abstract
Safety of reclaimed wastewater irrigation needs to be evaluated to promote public health. Quantitative microbial and toxic risk assessment was conducted to identify the level of risk for farmland workers who use reclaimed wastewater and groundwater in Jeju island. Microbial risk through inhalation and ingestion exposure was below acceptable level (less than $10^{-3}$) of $7.07{\times}10^{-6}$ for reclaimed wastewater and $9.99{\times}10^{-8}$ for groundwater irrigation worker. Aggregate exposure risk of Ni, As and Cu was most contributable to overall risk in both reclaimed wastewater and groundwater irrigation plot. High cumulative exposure risk was estimated through non-dietary soil ingestion and dermal contact of soil, due to the high concentration of As, Cu and Ni in farmland soil. Overall toxic risk was $2.68{\times}10^{-4}$ for reclaimed water and $2.39{\times}10^{-4}$ for groundwater irrigation, which could not meet acceptable toxic risk level of $10^{-6}$. Further efforts, such as provide personal protective equipments or public health education, need to be implicated to reduce adverse health risk.
Keywords
Jeju island; wastewater reuse; farmland irrigation; safety evaluation; risk assessment;
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Times Cited By KSCI : 3  (Citation Analysis)
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