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Human and Natural Resources Studies Centre, Kathmandu University, P.O. Box 6250, Kathmandu, Nepal


Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 10085, China


Laboratory of Green Chemistry, Lappeenranta University of Technology, Sammonkatu 12, FI-50130 Mikkeli, Finland


State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China


Author to whom correspondence should be addressed.

Abstract The risk of mercury exposure through consumption of fish from Lake Phewa, Nepal was investigated. A total of 170 people were surveyed to know their fish consumption levels. The weekly mercury Hg intake in the form of methylmercury MeHg through fish was calculated by using the data on average MeHg concentrations in fish, the average consumption of fish per week, and an average body weight of the people. Hotel owners were consuming significantly high amounts of fish, followed by fishermen, in comparison to the government staff, army-police, locals and others visitors. Some individuals exceeded the Provisional Tolerable Weekly Intake PTWI of 1.6 µg per kg body weight of MeHg FAO-WHO. The minimum intake of MeHg 0.05 µg-kg-week was found in the visitors others category, whereas the hotel owners had the maximum intake 3.71 µg-kg-week. In general, it was found that a person of 60 kg can consume at least 2 kg of fish per week without exceeding PTWI such that it does not pose any health risk associated with Hg poisoning at the present contamination level. Hg based PTWI values for Nepal has not been proposed yet in fishery resources so as to reduce health risk of the people. View Full-Text

Keywords: fish consumption; mercury exposure; Lake Phewa; Nepal fish consumption; mercury exposure; Lake Phewa; Nepal

Autor: Devna Singh Thapa 1, Chhatra Mani Sharma 1,2,3,* , Shichang Kang 2,4 and Mika Sillanpää 3



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