科研之友
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摘要
Industrial bloom has emerged to meet the human needs. However, industrial releases have become a major concern and risk to human health. The present investigation is directed at the synthesis of glucose-alumina hybrids using two precursors: conventional and greener standard chemical and spent foil, respectively, following sol-gel synthesis. Each synthesized hybrid was characterized using Fourier transform infra red spectroscopy, scanning electron microscopy, and EDX techniques. The significant contribution of synthesized hybrids is toward remediation of metals (Pb and Cr) from aqueous media. Frequencies at -OH (3,487-3,504cm(-1)), C-H (2,935-2,964cm(-1)), Al-O (798-800cm(-1)), Al-O-C (1,380-1,383cm(-1)), and Al-O-Al (659-669cm(-1)) indicate that metal cations bind to surface of hybrid through these linkages. Mesoporous structure with narrow distribution (26-40nm) and significant mass percentage of C, Al, and O is characterized on SEM-EDX. Batch experiments resulted in significantly higher removal of Pb (88%) than Cr (58%) that might be attributed to higher molecular weight of earlier. Further, divalent cation (Pb) provides more chelation for charge transfer with hydroxyl group on hybrids surface. Equilibrium studies are in good agreement with Freundlich and pseudo-second-order kinetics for adsorption process. Study concludes the efficiency of glucose-alumina hybrids from the greener and conventional routes is comparable. The study proposes a model for sustainable wastewater management.
- 出版日期2016-1-2
