Myanmar Health Sciences Research Journal
Volume 29, Number 2
TITLE: Monitoring of Water Quality in Inle Lake, Myanmar
AUTHOR: Mayuko Yagishita*, Mya Thandar, Minoru Yoneda, Takehiro Suzuki, Tin Tin Win Shwe, Daisuke Nakajima & Nay Soe Maung
SOURCE: Myanmar Health Sciences Research Journal, Vol. 29, No. 2, 2017
ABSTRACT: Inle Lake, one of the best tourist attraction places, is located in the Nyaung Shwe Township of Taunggyi District of Shan State in Myanmar. It is now suffering from the environmental effects due to deforestation, water pollution, disposal of solid garbage and lake sedimentation. The objective was to monitor water quality of Inle Lake by detecting endocrine disrupting chemicals, Escherichia coli and coliform groups. Water samplings of Inle Lake were conducted in dry and rainy seasons. Seven sampling points; boat station, the center area of the lake, near tomato farm, residential area, hotel, pagoda, and dye factory were selected. Samples were collected into empty clean plastic bottles. These samples were filtered using glass fiber filters and C18 discs at University of Public Health (Yangon), Myanmar. C18 discs were eluted by methanol and applied to chemical analysis. LC-QTOFMS and Triple Quad LC-MS were used as analytical equipment. The concentration level of bisphenol A was 167-241 ng/l, and that of p-nonylphenol was 99-375 ng/l. P-nonylphenol, however, was detected from mineral water as blank with highest concentration. This means that source of p-nonylphenol may be the plastic bottle. 17-beta-estradiol was detected from the sampling points in both the residential area and the tomato farm with high concentration. Their concentrations were 2.2-15 ng/l. The concentration of 17-beta-estradiol in the residential area, Inle Lake was considerably higher than those in Japan. These findings suggest that there is a need to continue assessment of water quality for confirmation of data of this pilot study and awareness of the local people on community development and environmental conservation is important for water quality control in Inle Lake.
SUBJECT HEADINGS: Inle Lake, Water quality, Dry and rainy seasons, Endocrine disrupting chemicals