title: Water quality improvement by natural plant-mineral composites and field temperatures of a eutrophic lake in South Korea.
abstract: To improve the water quality of Shingal Reservoir, a eutrophic lake in South Korea, field tests were performed to assess the influence of water temperature on water quality improvement (WQI) ability of domestic plant-mineral composites (PMCs). Interestingly, Cyanobacterium was found to be dominant even in low-temperature seasons, especially winter leading to more effective for diatom growth. Factors such as phytoplankton, biological oxygen demand (BOD) and phosphorous showed high WQI over 70% at 20 degrees C, but declined to 40% at temperatures above 25 degrees C. WQI for Cyanobacteria decreased with increasing water temperature, whereas for diatoms WQI was 90% regardless of water temperature. Additionally, bacterial density and total nitrogen showed very low WQI without water temperature. Collectively, the results indicate that high water temperature decreased WQI ability of a PMC to control phytoplankton (Microcystis aeruginosa) and increased their ability to control diatoms.
authors.forename: Byung
authors.initials: B
authors.lastname: Jung-Hwan
authors.forename: Ha-Kyung
authors.initials: HK
authors.lastname: Kim
authors.forename: Sun-Ki
authors.initials: SK
authors.lastname: Mun
authors.forename: Baik-Ho
authors.initials: BH
authors.lastname: Kim
mesh_terms: D005068:Eutrophication; D008903:Minerals; D010839:Phytoplankton; D028321:Plant Preparations; D056910:Republic of Korea; D014871:Water Microbiology; D060753:Water Quality
chemical_list: D008903:Minerals; D028321:Plant Preparations