摘要:Methylmercury distribution and production in the environment are reviewed. As for methylmercury distribution, the proportions of methylmercury to the total mercury in waters, soils, sediments and airs are mainly discussed. The origin of methylmercury in fish is also discussed. Methylation of inorganic mercury in the environment can be roughly divided into two groups ; one is biological and the other is chemical methylation. In this article, chemical methylations are discussed in detail. Effects of environmental factors, such as pH, redox potential and temperature, on the methylmercury production are also mentioned.