Kaushik A, Basu S, Singh K, Batra V S, Balakrishnan M
The Energy and Resources Institute (TERI), Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi, 110003, India.
The Energy and Resources Institute (TERI), Darbari Seth Block, IHC Complex, Lodhi Road, New Delhi, 110003, India.
J Environ Manage. 2017 Sep 15;200:29-34. doi: 10.1016/j.jenvman.2017.05.060. Epub 2017 May 25.
This work investigates the value added utilization of two sugar-distillery wastes: (i) melanoidins, which are complex Maillard reaction products in molasses distillery wastewater, and (ii) unburnt carbon in sugarcane bagasse ash. Activated unburnt carbon (AUC), prepared by deashing and steam activation, had properties comparable to commercial activated carbon (CAC). Both carbons are suitable for melanoidins adsorption followed by desorption using 25% pyridine solution. For AUC, the equilibrium adsorption data is well described by Langmuir isotherm up to 35 °C while Freundlich model fits better at higher temperature. Adsorption using CAC followed Freundlich isotherm at all temperatures. Both carbons followed pseudo second order kinetics and displayed endothermic physisorption. Recovery of melanoidins from AUC (78%) was close to that observed with CAC (80%).
（i）类黑素，它是糖蜜制糖废水里复杂的美拉德反应产物；（ii）甘蔗渣灰中的未燃碳。通过脱灰和蒸汽活化制备的活性未燃碳（AUC），其性能与商业活性炭（CAC）相当。两种碳都适用于类黑素的吸附，随后用25%吡啶溶液进行解吸。对于AUC，在35°C以下，朗缪尔等温线能很好地描述其平衡吸附数据，而在较高温度下，弗伦德里希模型拟合效果更好。使用CAC进行吸附，在所有温度下均符合弗伦德里希等温线。两种碳均遵循准二级动力学，并表现出吸热物理吸附。从AUC中回收类黑素的回收率（78%）与使用CAC时观察到的回收率（80%）相近。
