relation: https://khub.utp.edu.my/scholars/7023/ title: Process analysis of mercury adsorption onto chemically modified rice straw in a fixed-bed adsorber creator: Song, S.-T. creator: Hau, Y.-F. creator: Saman, N. creator: Johari, K. creator: Cheu, S.-C. creator: Kong, H. creator: Mat, H. description: The potential application of chemically modified rice straw (RSGM) was investigated in a fixed-bed adsorber as an extension of our previous batch adsorption studies. The effect of flow rates (2 mL/min, 4 mL/min and 8 mL/min), Hg(II) concentrations (50 mg/L, 100 mg/L, and 200 mg/L), and bed heights (1.5-4.5 cm) on the breakthrough characteristics of the fixed-bed adsorber was investigated. The adsorption isotherm data were best fitted to the Langmuir isotherm model, while the breakthrough data were found to be in good agreement with the Thomas and Yoon-Nelson models. The adsorbent bed regeneration results indicate a good adsorption-desorption reversibility with retaining adsorption performance of more than 90 after four cycles. The process design of the fixed-bed adsorber was demonstrated using the height of an equivalent transfer unit (HETU) method. The prediction of breakthrough curve was successfully carried out by scaling-up the Yoon-Nelson constants obtained from empty bed contact time (EBCT) plots. © 2016 Elsevier Ltd. All rights reserved. publisher: Elsevier Ltd date: 2016 type: Article type: PeerReviewed identifier: Song, S.-T. and Hau, Y.-F. and Saman, N. and Johari, K. and Cheu, S.-C. and Kong, H. and Mat, H. (2016) Process analysis of mercury adsorption onto chemically modified rice straw in a fixed-bed adsorber. Journal of Environmental Chemical Engineering, 4 (2). pp. 1685-1697. ISSN 22133437 relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959562739&doi=10.1016%2fj.jece.2016.02.033&partnerID=40&md5=fd2ae0acfba71f2936dd565e8e92bcf4 relation: 10.1016/j.jece.2016.02.033 identifier: 10.1016/j.jece.2016.02.033