ACTIVE CHARCOAL FROM WASTE OF AVOCADO SEEDS AS A CHROMIC (CR) METAL ADSORBENT USING CHLORIDE ACID (HCL) AND SULFURIC ACID (H2SO4) ACTIVATORDody Guntama, Lukman Nulhakim, Ika Mahardini et al.|Journal of Community Based Environmental Engineering and Management|2020Cited by 3