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[en] The research of chromium (VI) waste adsorption by zeolite has done. Wastes which are produced by Industries, both radioactive waste and heavy metal waste need done more processing so that they are not endanger environment and human health. Zeolite has very well-ordered crystal form with cavity each other to way entirely so that cause surface wide of zeolite become very big and very good as adsorbents. This research intends to know appropriate isotherm adsorption method to determine maximum capacity of zeolite to chromium (VI) waste. The equations which used in adsorption process are Langmuir and Freundlich isotherm Adsorption equations. The instrument was used in adsorption process by using Atomic Adsorption Spectroscopy (AAS). The experiment result showed that the biggest mass of chromium (VI) metal ion which was absorb by zeolite in 20 ppm concentration was 7.71 mg/gram zeolite. Adsorption process of Chromium (VI) waste by zeolite followed Langmuir and Freundlich isotherm equations with R2>0,9 . Appropriate equation to determine maximum adsorption capacity of zeolite for chromium (VI) waste adsorption is Langmuir equation. The maximum adsorption capacity of zeolite is 52.25 mg/gram. (author)
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Duyeh Setiawan; Rochestri Sofyan; Nurlaila Z; Poppy Intan Tjahaja; Efrizon Umar; Muhayatun; Nanny K Oekar; Sudjatmi K Alfa; Dani Gustaman Syarif; Didi Gayani; Djoko Hadi P; Saeful Hidayat (National Nuclear Energy Agency, Bandung (Indonesia)); Ari Darmawan Pasek; Nathanel P Tandian; Toto Hardianto (Bandung Institute of Technology, Bandung (Indonesia)) (eds.); Centre for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency (Indonesia); 386 p; ISSN 1858-3601; 
; Nov 2009; p. 130-136; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 6 refs.; 3 tabs.; 4 figs.
; Nov 2009; p. 130-136; National Seminar in Nuclear Science Technology; Seminar Nasional Sains dan Teknologi Nuklir; Bandung (Indonesia); 3 Jun 2009; Also available from Center for Nuclear Technology Material and Radiometry, National Nuclear Energy Agency, Jl. Tamansari 71, Telp. 62-22-2503997 Fax. 62-22-2504081, Bandung 40132 (ID); 6 refs.; 3 tabs.; 4 figs.