Synthesis of Al2O3/carbon composites from wastewater as superior adsorbents for Pb(II) and Cd(II) removal
作者： Hang Chen , Jianmin Luo , Xiao Wang , Xiaoyu Liang , Yunlong Zhao
DOI: 10.1016/J.MICROMESO.2017.07.023
关键词:
摘要: Abstract Al2O3/carbon (Al2O3/C) composites obtained from the alkaline wastewater of oil refinery and acid aluminum anodizing factory have been studied with principle “using waste to treat waste”. The process includes these steps: (1) acid-alkali neutralization, (2) evaporation, (3) calcination, (4) washing drying. Al2O3/C prepared by calcinating precursors under Ar atmosphere are used as high-capacity adsorbents for removal Pb(II) Cd(II) aqueous solutions. For Pb(II), adsorptive behavior satisfies Langmuir assumptions maximum adsorption capacity reaches 709.2 mg g−1. Cd (II), Freundlich equilibrium is up 1299.4 mg g−1. single Cd(II), kinetics follows Pseudo-second-order model well. This route shows a possible way reducing emissions environment, recovering resource valuable material, providing novel strategy treatment.
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