Enrichment of heavy metals in coal gangue by puff balls and .
WEBOct 29, 2014 · Coal gangue with/without wild puff balls growing on or covering up were analyzed by means of inductively coupled plasma atomic emission spectrometry (ICPAES) and atomic fluorescence spectrometry (AFS) to detect the contents of heavy metal elements in the plants. Seven heavy metals were chosen to do the experiments, which showed .