The recovery of gold from secondary sources Introduction S. Syed Green reagent for leaching of gold from spent mobile phone printed circuit boards Jae chun Lee Electroless displacement deposition of gold from aqueous source recovery from waste electrical and electronic equipment (WEEE) using waste silicon powder Kenji Fukuda and Shinji Yae Adsorption of gold on granular activated carbons and new sources of renewable and eco friendly activated carbons Gerrard Eddy Jai Poinern Shashi Sharma Derek Fawcett Development of novel biosorbents for gold and their application for the recovery of gold from spent mobile phones Katsutoshi Inoue Manju Gurung Hidetaka Kawakita Keisuke Ohto Durga Parajuli Bimala Pangeni and Shafiq Alam Environmentally friendly processes for the recovery of gold from waste electrical and electronic equipment (WEEE) : a review Isabella Lancellotti Roberto Giovanardi Elena Bursi and Luisa Barbieri Study on the influence of various factors in the hydrometallurgical processing of waste electronic materials for gold recovery Ionela Birloaga and Francesco Veglio