Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China.
J Environ Health Sci Eng. 2014 Mar 12;12(1):63. doi: 10.1186/2052-336X-12-63.
Dyes released into the environment have been posing a serious threat to natural ecosystems and aquatic life due to presence of heat, light, chemical and other exposures stable. In this study, the Pleurotus ostreatus (a macro-fungus) was used as a new biosorbent to study the biosorption of hazardous malachite green (MG) from aqueous solutions. The effective disposal of P. ostreatus is a meaningful work for environmental protection and maximum utilization of agricultural residues.The operational parameters such as biosorbent dose, pH, and ionic strength were investigated in a series of batch studies at 25°C. Freundlich isotherm model was described well for the biosorption equilibrium data. The biosorption process followed the pseudo-second-order kinetic model. Taguchi method was used to simplify the experimental number for determining the significance of factors and the optimum levels of experimental factors for MG biosorption. Biosorbent dose and initial MG concentration had significant influences on the percent removal and biosorption capacity. The highest percent removal reached 89.58% and the largest biosorption capacity reached 32.33 mg/g. The Fourier transform infrared spectroscopy (FTIR) showed that the functional groups such as, carboxyl, hydroxyl, amino and phosphonate groups on the biosorbent surface could be the potential adsorption sites for MG biosorption. P. ostreatus can be considered as an alternative biosorbent for the removal of dyes from aqueous solutions.
由于热、光、化学和其他稳定因素的存在，释放到环境中的染料对自然生态系统和水生生物构成了严重威胁。在这项研究中，平菇（一种大型真菌）被用作一种新的生物吸附剂，用于研究从水溶液中吸附危险的孔雀石绿（MG）。有效处理平菇对环境保护和最大限度地利用农业废弃物具有重要意义。在 25°C 的一系列批量研究中，研究了生物吸附剂剂量、pH 值和离子强度等操作参数。Freundlich 等温模型很好地描述了生物吸附平衡数据。生物吸附过程遵循拟二级动力学模型。田口法用于简化确定因素重要性和 MG 生物吸附最佳实验因素水平的实验数量。生物吸附剂剂量和初始 MG 浓度对去除率和生物吸附容量有显著影响。最高去除率达到 89.58%，最大生物吸附容量达到 32.33 mg/g。傅里叶变换红外光谱（FTIR）表明，生物吸附剂表面的羧基、羟基、氨基和膦酸基团等官能团可能是 MG 生物吸附的潜在吸附位点。平菇可以被认为是一种从水溶液中去除染料的替代生物吸附剂。
