Pollution On Water And Fish Production
Aug 16, 2017 Cement production. Mercury use in manufacturing in Ghana is mainly in cement production. Mercury is introduced to the process via raw materials or fuels, in varied concentrations. Mercury contents are found in the raw materials such as natural and artificial gypsum, earth crust, limestone, lime marl, chalk, clay, sand and iron ore.Sand mining in rivers is a major cause of coastal erosion in many countries. Sand mining in a river lowers the river bed, causes bank erosion and reduces the supply of sand to the coast. There are five components in the sediment balance for a degrading river section, schematically represented in.