... from farmland, water treatment equipment containing wood charcoal was devised to enable the charcoal to remove organic matter, nutrients and heavy metals in the drainage from a paddy field, and ... organic matter, nutrients, and heavy metals in a test paddy field was investigated The following results were obtained: (1) The TOC, TN, TP, Cr, Fe and Pb in the drainage from the paddy field were ... chemical property for charcoal and heavy metals in soil and water, and so on Since heavy metals are known to be transported in water combined with DOM, the removal of heavy metals linked with DOM needs...