PMID- 28407589 OWN - NLM STAT- MEDLINE DCOM- 20180730 LR - 20181202 IS - 1879-1026 (Electronic) IS - 0048-9697 (Linking) VI - 595 DP - 2017 Oct 1 TI - Transport of anionic azo dyes from aqueous solution to gemini surfactant-modified wheat bran: Synchrotron infrared, molecular interaction and adsorption studies. PG - 723-732 LID - S0048-9697(17)30859-8 [pii] LID - 10.1016/j.scitotenv.2017.04.031 [doi] AB - From the view of economic efficiency and technology sustainability, biomass adsorbent has a high potential for pollution control. In the present study, the performance of gemini 12-2-12 surfactant-modified wheat bran (MWB) for the removal of anionic azo dyes from aqueous solution was investigated. A new insight was gained into the modification mechanism through synchrotron-assisted infrared analysis and molecular interaction simulation. The equilibrium and kinetic studies for the adsorption of Acid Red 18 (AR-18), Acid Orange 7 (AO-7) and Acid Black 1 (AB-1) on MWB were conducted. The Langmuir model well fit the adsorption isotherm data. The adsorption kinetics could be described by the pseudo-second-order and intra-particle diffusion models. The results of thermodynamic studies indicated the adsorption of AR-18 and AB-1 onto MWB was endothermic and spontaneous, while the adsorption of AO-7 was exothermic. The optimum pH for the adsorption of anionic azo dyes on MWB was 3. The adsorbed amount of anionic azo dyes onto MWB decreased when NaCl concentration increased from 0 to 0.4molL(-1). The potential of modified wheat bran as a suitable adsorbent for the removal of dyes from wastewater was presented in this study. The results can help understand the migration patterns of organic pollutants at wheat bran-water interface. CI - Copyright (c) 2017 Elsevier B.V. All rights reserved. FAU - Zhang, Yan AU - Zhang Y AD - MOE Key Laboratory of Resources and Environmental Systems Optimization, Institute for Energy, Environment and Sustainability Research, UR-NCEPU, North China Electric Power University, Beijing 102206, China; Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina S4S 0A2, Canada. FAU - Huang, Guohe AU - Huang G AD - MOE Key Laboratory of Resources and Environmental Systems Optimization, Institute for Energy, Environment and Sustainability Research, UR-NCEPU, North China Electric Power University, Beijing 102206, China. Electronic address: huang@iseis.org. FAU - An, Chunjiang AU - An C AD - Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina S4S 0A2, Canada. FAU - Xin, Xiaying AU - Xin X AD - Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina S4S 0A2, Canada. FAU - Liu, Xia AU - Liu X AD - Canadian Light Source, Saskatoon, S7N 2V3, Canada. FAU - Raman, Maya AU - Raman M AD - Bioengineering and Drug Design Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology-Madras, Chennai 600 036, India. FAU - Yao, Yao AU - Yao Y AD - Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina S4S 0A2, Canada. FAU - Wang, Wenxia AU - Wang W AD - MOE Key Laboratory of Resources and Environmental Systems Optimization, Institute for Energy, Environment and Sustainability Research, UR-NCEPU, North China Electric Power University, Beijing 102206, China. FAU - Doble, Mukesh AU - Doble M AD - Bioengineering and Drug Design Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology-Madras, Chennai 600 036, India. LA - eng PT - Journal Article DEP - 20170411 PL - Netherlands TA - Sci Total Environ JT - The Science of the total environment JID - 0330500 RN - 0 (Azo Compounds) RN - 0 (Coloring Agents) RN - 0 (Surface-Active Agents) RN - 0 (Water Pollutants, Chemical) SB - IM MH - Adsorption MH - Azo Compounds/*isolation & purification MH - Coloring Agents/isolation & purification MH - Hydrogen-Ion Concentration MH - Kinetics MH - Surface-Active Agents/chemistry MH - Synchrotrons MH - Thermodynamics MH - Triticum MH - Water Pollutants, Chemical/*isolation & purification MH - Water Purification/*methods OTO - NOTNLM OT - Adsorption OT - Anionic azo dyes OT - Gemini surfactant modification OT - Molecular interaction simulation OT - Synchrotron infrared analysis OT - Wheat bran EDAT- 2017/04/14 06:00 MHDA- 2018/07/31 06:00 CRDT- 2017/04/14 06:00 PHST- 2017/02/08 00:00 [received] PHST- 2017/04/04 00:00 [revised] PHST- 2017/04/05 00:00 [accepted] PHST- 2017/04/14 06:00 [pubmed] PHST- 2018/07/31 06:00 [medline] PHST- 2017/04/14 06:00 [entrez] AID - S0048-9697(17)30859-8 [pii] AID - 10.1016/j.scitotenv.2017.04.031 [doi] PST - ppublish SO - Sci Total Environ. 2017 Oct 1;595:723-732. doi: 10.1016/j.scitotenv.2017.04.031. Epub 2017 Apr 11.