Hu Chenchen, Zhang Heng, Liu Xueming, Lin Zhang, Su Xintai, Chen Huamei
Ministry Key Laboratory of Oil and Gas Fine Chemicals, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
J Nanosci Nanotechnol. 2020 Feb 1;20(2):769-778. doi: 10.1166/jnn.2020.16935.
A super absorbent was synthesized from calcium-aluminum waste residue of aluminum industrial using a facile hydrothermal method. The XRD results revealed that the main phase of hydrothermal product at 120 °C is CaSO₄ ·2H₂O, with a small amount of Al(OH)₃. The as-prepared products were used to investigate the adsorptive applications in Congo red (CR) removal, and the results showed that the products treated at 120 °C had the best adsorption properties. The maximum adsorption capacity reaches about 1860.11 mg/g with a removal rate of 99.75%. Furthermore, the used adsorbent could be regenerated for at least four cycles through a calcination procedure, indicating its potential as an excellent adsorbent for the removal of CR dye from wastewater. The adsorption behavior was analyzed by Langmuir, Freundlich and Sips isotherms, and the adsorption proved to be a multilayer adsorption. This facile method presented here may provide promise synthesis of high-effective and low-cost adsorbents from industrial solid waste and achieve the goal of "using waste to treat waste" in the future.
采用简便的水热法，以铝工业的钙铝废渣为原料合成了一种高吸水性材料。X射线衍射结果表明，120℃水热产物的主要物相为CaSO₄·2H₂O，还有少量Al(OH)₃。将所制备的产物用于刚果红（CR）去除的吸附应用研究，结果表明，120℃处理的产物具有最佳的吸附性能。最大吸附量达到约1860.11mg/g，去除率为99.75%。此外，用过的吸附剂可通过煅烧程序至少再生四个循环，表明其作为从废水中去除CR染料的优良吸附剂的潜力。通过Langmuir、Freundlich和Sips等温线对吸附行为进行了分析，结果表明该吸附为多层吸附。本文提出的这种简便方法可能为从工业固体废物中合成高效低成本吸附剂提供希望，并在未来实现“以废治废”的目标。
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