Liu, Qiang Green synthesis of tannin-hexamethylendiamine based adsorbents for efficient removal of Cr(VI). [electronic resource] - Journal of hazardous materials 06 2018 - 27-35 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1873-3336 Standard No.: 10.1016/j.jhazmat.2018.02.040 doi