International Centre for Bamboo and Rattan, Beijing 100102, China.
Key Laboratory of NFGA/Beijing for Bamboo & Rattan Science and Technology, Beijing 100102, China.
Molecules. 2023 Apr 12;28(8):3410. doi: 10.3390/molecules28083410.
To effectively remove methylene blue (MB) from dye wastewater, a novel activated carbon (BAC) was manufactured through co-pyrolysis of bamboo shoot shell and KFeO. The activation process was optimized to a temperature of 750 °C and an activation time of 90 min based on its excellent adsorption capacity of 560.94 mg/g with a yield of 10.03%. The physicochemical and adsorption properties of BACs were investigated. The BAC had an ultrahigh specific surface area of 2327.7 cm/g and abundant active functional groups. The adsorption mechanisms included chemisorption and physisorption. The Freundlich model could be used to describe the isothermal adsorption of MB. The kinetics confirmed that the adsorption of MB belonged to the pseudo-second-order model. Intra-particle diffusion was the main rate-limiting step. The thermodynamic study showed that the adsorption process was endothermic and temperature was beneficial for the improvement of adsorption property. Furthermore, the removal rate of MB was 63.5% after three cycles. The BAC will have great potential for commercial development for purifying dye wastewater.
为了有效去除染料废水中的亚甲基蓝（MB），通过竹壳和 KFeO 的共热解制备了一种新型活性炭（BAC）。基于其出色的吸附能力 560.94mg/g 和产率 10.03%，将其吸附容量优化至 750°C 和 90min。研究了 BAC 的物理化学和吸附性能。BAC 具有超高的比表面积 2327.7cm/g 和丰富的活性官能团。吸附机制包括化学吸附和物理吸附。Freundlich 模型可用于描述 MB 的等温吸附。动力学证实 MB 的吸附属于准二级模型。内扩散是主要的速率限制步骤。热力学研究表明，吸附过程是吸热的，温度有利于提高吸附性能。此外，三次循环后 MB 的去除率为 63.5%。BAC 在净化染料废水方面具有很大的商业开发潜力。
