Fe₂O₃/Al₂O₃ microboxes for efficient removal of heavy metal ions Rini Ravindranath, Prathik Roy, Arun Prakash Periasamy, Yu-Wen Chen, Chi-Te Liang, Huan-Tsung Chang Jun 8, 2017 Fe₂O₃/Al₂O₃ microboxes heavy metal ions removal