Cr(VI) and Dye Biosorption in Batik Wastewater using Biosorbent in The Tea Bag Lestari Sri, Sudarmadji, Djalal Tandjung Shilahuddin and Juari Santosa Sri E3S Web Conf., 73 (2018) 05011 Published online: 21 December 2018 DOI: 10.1051/e3sconf/20187305011