School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China.
Water Sci Technol. 2011;63(12):2775-80. doi: 10.2166/wst.2011.542.
This study focuses on the possible use of the spent corncob substrate (SCS), an agricultural waste used after the cultivation of white rot fungus Pleurotus ostreatus, to adsorb Methylene Blue (MB) from aqueous solutions. A batch adsorption study was carried out with variable solution pH, adsorption time, temperature and initial MB concentration. It was found that MB uptake was favorable at pH ranging from 4.0 to 12.0 and the equilibrium adsorption capacity can be reached promptly within about 180 min. The biosorption data were also calculated by the pseudo-second-order kinetic model and Langmuir isotherm model. Thermodynamic parameters show that the adsorption is a spontaneous and endothermic process. The study highlighted a new pathway to develop potential low-cost biosorbent for the removal of dye pollutants from wastewater.
本研究关注的是利用已用于栽培糙皮侧耳（Pleurotus ostreatus）后的废弃玉米芯作为吸附剂，从水溶液中吸附亚甲基蓝（MB）的可能性。采用批次吸附实验，考察了溶液 pH 值、吸附时间、温度和初始 MB 浓度等变量。结果表明，在 pH 值为 4.0 至 12.0 范围内有利于 MB 的吸附，且在约 180 分钟内即可迅速达到吸附平衡。通过准二级动力学模型和 Langmuir 等温模型对吸附数据进行了计算。热力学参数表明，吸附是一个自发的吸热过程。该研究为开发潜在的低成本生物吸附剂，以去除废水中的染料污染物提供了新途径。
