文摘
Relationship between KBD and the environment was studies by examining the chemistry of the surface waters in NW Sichuan, China; Surface waters in the study area were found to be near neutral to slightly alkaline, mostly soft and low in salinity; Spatially, water hardness/salinity was found to be lower towards the center of the area where most severe KBD has been observed; Long-term consumption of such soft and low salinity waters may lead to a deficiency of some essential elements in humans; And such a deficiency of essential elements such as Ca, Mg, Se and I in humans may be a factor in inducing KBD.